Happy Holidays – thank you for your magnificent Business !!! Christmas 2020 & Chinese New Year 2021

The hustle and bustle of the Christmas season is exciting for our staff.

But we have not forgotten about our loyal customers + partners.

Thank you for your excellent support this year. We look forward to continuing our successful partnership in 2021!

Karl Kruse will begin its annual winter shutdown on December 24, 2020. After that day, the team will be out of the office, returning on Monday, January 4, 2021.

If you need to place an order you can check out our webshop  www.kruse24.com .

Karl Kruse would also like to make our customers aware of the impact of Chinese New Year on lead-times. From February 8th to February 18th, 2021, manufacturing factories will be closed which will affect manufacturing times significantly.

Karl Kruse recommends placing orders early to reduce the possible impact on your business and would like to remind customers of the current shortage in ICs which is already impacting lead times on displays, especially on TFT products. We expect deliveries to extend by at least a further four weeks.

The team at Karl Kruse would like to take this opportunity to thank our customers and vendors for their support in a challenging year which has been impacted by the COVID-19 pandemic. We wish you a Merry Christmas, and a prosperous New Year. Have a happy and safe holiday season.

Santa Klaus with Team.

New series of Enclosed AC-DC switching power supplies

Power supplies for 15-150W in particularly flat housings

The power supplies of the new LMxx-23Bxx series with their first-class electrical, climatic and mechanical parameters are an ideal choice for demanding applications in many areas of application.

The new AC / DC power supplies of the LMxx-23Bxx series can be used very universally in the industrial, laboratory and consumer sectors. Typical applications are e.g. Measuring and control devices, automation equipment, distributed networks, security technology, smart home, IoT and household appliances.

The power supplies of the LM series have a highly compact metal housing and can be operated with either AC or DC voltage. New devices with particularly wide input voltage ranges of 85-305 VAC or 100 / 120-430 VDC were recently introduced under the name LMxx-23Bxx. The addition to the program includes a total of seven series with output powers of 15W, 25W, 35W, 50W, 75W, 100W and 150W, each of which has up to seven product versions with an output voltage of 3.3V, 5V, 12V, 15V, 25V, 36V or 48V.

The isolation between input and output is designed for voltages up to 4 kVAC and the EM interference emission fulfills the requirements of class B of EN 55032 even without additional external components high efficiency of the new power supplies. The output is protected against short circuit, overcurrent and overvoltage; a range of -30 ° C to + 70 ° C is permitted for the temperature at the place of use. A protective coating of the housing (article number with suffix “Q”) and a protective cover for the connections (article number with suffix “C”) are available as optional equipment.

Power supplies for 100-320W with active PFC and wide range input

The power supplies of the new LMFxx-23Bxx series are ideal solutions for demanding applications.

As they are equipped with high peak input voltages, the LMFxx-23Bxx power supplies have wide input voltage ranges of 85-305 VAC or 120-430 VDC. This makes them suitable for connection to networks with nominal voltages of 115V, 230V and 277V and remain operationally reliable even in the event of significant transient or long-term overvoltages. The new series deliver output powers of up to 100W, 150W, 200W and 320W and nominal output voltages of 5V, 12V, 15V, 24V or 48V, which can be trimmed with a potentiometer. An active power factor correction (PFC) ensures, among other things, ensure that the harmonic currents always remain well below the relevant limit values ​​for electromagnetic interference emissions according to EN 61000-3-2.

The isolation between input and output is designed for voltages up to 4.0 kVAC. Functions for protection against short circuit, overcurrent, overvoltage and overtemperature and an MTBF over 250,000 h ensure safe and reliable operation. A protective coating of the housing (article number with suffix “Q”) or a protective cover for the connections (article number with suffix “C”) are available as optional equipment.

Application Areas

The new AC / DC power supplies of the LMxx-23Bxx + LMF100 / 150/200 / 320-23Bxx series can be used very universally in the industrial, laboratory and consumer sectors. Typical applications are e.g. Measuring and control devices, automation equipment, distributed networks, security technology, smart home, IoT and household appliances.

Contact Karl Kruse at Schirmer Strasse 59, 40211 Düsseldorf by phone at + 49-211 27403530, e-mail to info@kruse.de .

You will find the perfect switching power supplies for your application here.

Develop healthcare/medical equipment

KARL KRUSE is gratefully cooperating with GIGAIPC to develop healthcare/medical equipment implemented with their QBiP Series (3.5″SBC), to help medical personnel worldwide. and fight against COVID-19.


GIGAIPC 3.5″ SBC wide-temperate embedded board supports -40~85 degree.

They also supply various 3.5” solutions in normal temp with Intel Apollo Lake, Kaby Lake, Baytrail, AMD CPUs Platform.

A complete range of standard form-factors includes GIGAIPC’s industrial motherboard series, as well as small-size industrial motherboards for single-board computers and Intel® Certified Smart Display Modules. GIGAIPC’s industrial motherboards offer high reliability and long product life-time support, at the same time various features are offered in each product to fulfill specific customer’s requirements. To fit in extreme surrounding environments GIGAIPC offers products with a Wide Operation Temperature Range, diverse and rich I / O combinations, same as Wide Range DC IN to be able to fit in industrial automation fields. Motherboards can fulfill demands from Retail and Digital Signage to Factory Automation, Medical and Transportation vertical markets.

EC Fans – Growing in Popularity

Energy conservation is of ever increasing importance in today’s world. About 25% of the primary energy consumption in the residential and commercial sectors is used by electric motor-driven systems and components in appliances and equipment. Replacing existing equipment with advanced energy-efficient motors results in a substantial reduction in energy usage and cost.For today’s demanding applications that require increased electrical efficiency,EC (electronically commutated) fans represent a significant advancement in power savings technology, providing cooling and air flow solutions.

What Are EC Fans

EC fans are powered by brushless DC motors, which are also known as EC motors. Due to its inherent design that uses permanent magnets to generate a secondary magnetic field rather than copper windings, DC motors can be up to 30% more efficient than AC motors . Brushless DC motors are typically 85-90% efficient while brushed DC motors are generally in the range of 75- 80% efficient; the brushed motors lose efficiency from brush friction. The increased efficiency of the brushless motor means that less energy is lost as heat, while more energy is turned into rotational force and therefore power.

EC motors are controlled by external or onboard electronics that convert the incoming AC power signal to the DC voltage needed by the motor. The electronic circuitry performs the function of the mechanical commutation that switches the direction of the current and the magnetic field polarity to induce the motor’s rotation. As adjusting the power to the EC motor controls the EC fan speed, thereby improving performance, the design allows for more accurate and efficient motor control.

Why Use EC Fans

As long as the interface between the fan and the device is left unchanged, EC fans can be used in most applications where AC fans are used.When this interface is properly designed, EC fans can be used as “drop-in” replacements for AC fans. Compared to AC fans, EC fans are the same size while offering the same or higher airflow capacity — all with significantly less power.

Because they have built-in variable speed control a A large portion of the energy efficiency of EC fans occurs . Small reductions in the fan speed lead to large reductions in the power requirement, since the relationship between the fan speed and the power required by the fan is a cube function. Precisely controlling the fan speed to match the airflow demand of the application can result in substantial energy savings.

High efficiency EC fans have gained popularity and are being used in applications where there is a need to meet energy efficiency regulations, yet they offer other advantages as well. EC motors avoid the sparking and potential electromagnetic interference of brushed motors. They have longer service life due to the smaller heat losses and lower operating temperatures. The lower operating temperature means that the fan does not have to do extra work to remove wasted heat that is generated by the motor itself. EC motors offer a wide operating window of fairly constant efficiency over a range of speeds due to their variable fan speed control, when compared to AC motors, which tend to have peak efficiency at a single speed. In addition, EC motors require little to no maintenance and provide increased reliability. Since EC fans have lower operating costs, this leads to shorter payback periods for new equipment.

EC fans are ideal for use in major home appliances such as refrigerators, freezers, ovens, range hoods, microwaves, dishwashers and clothes washer-dryers.

Originally used only in high-end appliances, they are now used in high volume/mass market appliances due to their energy savings advantages (i.e., their higher efficiencies). Additional applications may include air conditioning units, heat pumps, furnace fans, dehumidifiers, beverage vending machines, automatic icemakers, commercial appliances, commercial chillers, duct fans for ventilation, condenser units and extraction fans for removing smoke and exhaust. However, the biggest uses for motor-driven elements in both the residential and commercial sectors are refrigeration and HVAC (heating, ventilation and air conditioning).

Market Requirements for Energy Usage

Government eco-design regulations and marketplace requirements for energy efficiency standards are driving design considerations, in the consumer appliance market.Energy efficiency has become one of the performance specifications for new appliances. The high electrical efficiency of EC fans aids in meeting these requirements.

In the U.S. market, the Department of Energy (DOE) is responsible for upholding the minimum energy efficiency standards for household appliances that were established in 1987 as the National Appliance Conservation Act. Under the Federal Trade Commission falls, labeling appliances with the ENERGY GUIDE, which lists energy consumption, efficiency and operating cost information. The ENERGY STAR label, a voluntary program under the Environmental Protection Agency, has even more strict requirements on energy savings. The Building Technologies Office of the DOE has outlined potential energy savings using EC motors in commercial and residential equipment.

While others are in process, some energy conservation standards have been established so far.

Examples of some of these standards are as follows:

  • Residential refrigerators and freezers – 76 FR 57516 (September 15, 2011)
  • Residential clothes dryers – 80 FR 16309 (March 27, 2015 – proposed rule)
  • Commercial and industrial fans and blowers – 81 FR 75742 (November 1, 2016 – proposed rule)
  • Residential mechanical ventilation system fans – 82 FR 2857 (January 10, 2017)

The European Union established two eco-design directives on minimum energy efficiency requirements. Directive 2009/125/EC extends the requirements for energy-related products (ErP) which help to reduce electrical usage, such as insulation materials, while Directive 2005/32/EC sets the requirements for energy-using products (EuP) such as household appliances.

Several energy conservation standards have been established, and others are under consideration:

  • Household refrigerators – Commission Regulation (EC) No 643/2009
  • Household dryers – Commission Regulation (EU) No 932/2012
  • Domestic ovens, cook tops, and range hoods – Commission Regulation (EU) No 66/2014
  • Professional refrigeration units (storage cabinets, blast cabinets, condensing units and process chillers) – Commission Regulation (EU) 1095/2015


Home appliances, those that operate continuously, such as refrigerators and freezers, provide the best opportunity for energy savings. Improvements on features such as seals and compressors, the usage of vacuum panels for added insulation, and the switch to LED lighting made some reduction in energy consumption for these appliances. The best opportunity for energy savings offers the use of EC motors and fans. Fans and motors are used both inside the refrigerator, to circulate air around the coils and maintain specified temperatures, and outside, to cool air around the condenser.

Range hoods provide another opportunity for using EC fans. While not in continuous operation, the function of a range hood, or exhaust hood, is to remove heat, steam, fumes, smoke, odors, grease and airborne particles in the area above a cooktop by means of an electric fan. To remove all these potential contaminants while not being so noisy that it is never used, the fan needs to be sufficiently powerful . In a more energy-efficient way EC fans provide both of these functions. As the appropriate fan speed can be selected as needed, Dual-speed range hoods provide even greater energy savings.

Washer-dryer combos and Clothes dryers (which, while more common in the European market, are growing in popularity in the U.S. market) are a third example of home appliances where EC fans provide a great benefit. To remove moisture from the clothing EC fans are used to bring hot air into the dryer . The humid air is either sent out through an exhaust vent or passed by a heat exchanger to remove moisture through condensation before more hot air enters the dryer. Increases in air flow performance are provided by EC fans, and this improves the energy efficiency of these appliances, while their lower noise level improves customer satisfaction.

Central air conditioning systems use several motors, one each for the compressor, the outdoor fan and the indoor blower. To circulate air throughout the ductwork a similar indoor blower is used in furnace systems. Replacing existing AC fans with more energy- efficient EC fans offers the highest potential savings due to the variable fan speed motor, although maximum energy savings can only be achieved if the entire system, including the compressor, is designed for variable speed. Also, running a furnace fan at a reduced speed may require it to operate for a longer time period, reducing some of the savings.


To meet the more stringent energy efficiency standards in place EC fans are being used in both the U.S. and European markets. EC fans can be used as drop-in replacements for less efficient AC fans, by maintaining the same interface between the fan and the appliance. EC motors can drive both axial and radial fans, as needed by the specific application. Orion Fans will be introducing a family of EC fans and blowers offering low power, dual speed, energy-efficient cooling solutions. Ranging in sizes from 60mm to 280mm, some of these EC series fans feature universal voltage input making them easy to design in for a wide variety of applications. Enabling customers to meet energy-consumption requirements from agencies like ENERGY STAR, they offer energy savings of up to 50%. Additional models and sizes of EC fans will be available from Orion Fans.

Living Automotive and Industrial DRAMs

Long-term product support is a key consideration for autmotive and industrial applications, Etron’s Automotive and Industrial DRAMs provide benefits of continuity of supply, long-term reliability, wide temperature range operation , low power for small form factors.


  • Continuity of Supply
  • Long-Term Reliability
  • Wide Temperature Range Operation
  • Low Power and Small Form Factor

EML Program Overview

Supply Mechanism for Making Long-term Business Partners

Etron has maintained the flexibility, agility and product focus of a fabless IC company by establishing strong partnerships with leading Memory foundries and companies with complementary skills from different specialty segments. With the benefit of worry-free supply Etron has secured long-term business with our local and overseas car electronics partners since 2004.

Etron have designed both automotive and industrial graded memory parts to provide predictable obsolescence cycles for variety of memory densities and package types. EML (Extended Manufacturing Longevity) guarantees availability for devices put into EML program. The program boasts with three primary life categories (5, 7 and 10 years). The program is designed for long-term customer support. Other categories may be available to support unique requests.

We can support you Automotive, Industrial and Medical applications!!! For more infos, pls drop us an email: info@kruse.de

Total Circuit Protection Solution for LED Lighting

AEM Components’ MF series of high-performance, wire-in-air fuses combined with the HSP series of high surge protection devices provide a complete surface-mount circuit protection solution for LED lighting applications.

These low-profile, compact devices offer the highest level of protection in the smallest package sizes. Together they provide the assurance of reliable, long-term performance under high surge and high temperature operating conditions while meeting stringent international safety specifications.

MF Series Fuses            #MF1210   #MF2410
  • Compact footprint
  • High inrush withstand
  • 125V and 250V ratings
  • Meets voltage surge requirements of
  • Energy Star and IEC61000-4-5
  • Lead-free and RoHS


HSP Series Surge Protection      #HSP1210   #HSP1812  #HSP2220
  • Compact footprint
  • High voltage withstand
  • High surge current withstand
  • Meets voltage surge requirements of
  • Energy Star and IEC61000-4-5
  • Lead-free and RoHS

For more information and complete design information,pls send us an email to  info@kruse.de
or visit our shop.

Electronics for medical technology

For the benefit of the patient, product development is subject to its own laws in medical technology. Treatment and diagnosis open up new ways for humans through the benefits of microelectronics.

In order to be able to make correct recommendations for customer wishes and markets, Karl Kruse checks in advance all components that are needed for a medical device.

Medical technology is operated at different supply voltages around the world. Karl Kruse offers fans from Orion fans with either AC, DC or wide-range voltage input for powering the electronics and drive. DC fans are suitable for mobile battery operation and low power consumption.

The fans in axial, diagonal or radial design are aerodynamically designed for a high flow rate with quiet running and can be used, for example, for cooling of CT devices, PET scanners and MRI machines.

Connectors and cable assemblies

In medicine, proven and reliable connectors are indispensable.

Karl Kruse offers connectors that are ideal for electronic medical devices such as surgical instruments, diagnostic equipment, disposable devices, cardiac support systems, therapeutic and dental devices. Customized designs and cable assemblies are also possible


AEM Inc (Sales: Karl Kruse www.kruse.de) has announced the availability of its DSCC-approved line of ferrite chip beads, which are particularly adapted for medical, military, aerospace and other critical applications where reliability a top concern is.

The HRB series is the first and only line of ferrite beads made with qualified materials and tested with the DSCC drawing 03024. The DSCC specifications of drawing 03024 prescribe the strict physical, electrical and operational specifications for the high reliability ferrite chip beads.

The HRB series are available in sizes 0603, 0805 and 1206 and with nominal currents from 0.2 A to 4.0A. They have an operating temperature range of -55ºC to + 125ºC, tin / lead or gold, Ni-barrier solder plated terminations to eliminate the possibility of tin whisker formation and ensure reliable solder joints. Materials and processes are fully traceable and all parts are supplied with group A / B test data. Group C inspection as an option.

The HRB series exemplifies the heritage of AEM in producing high-reliability components for medical technology. AEM is able to offer value-added product processing and high-reliability testing, which can be filmed to 03024 specification to meet our customers’ unique and crucial program requirements. These additional benefits are not offered by other ferrite chip bead manufacturers. “

Power for medical technology

Modern applications in medical technology are subject to strict regulatory requirements and have four main trends:

Safety, reliability, connectivity and low power consumption.

TOPPOWER (Distribution: Karl Kruse www.kruse.de) PCB-mountable converter modules are widely used in monitoring equipment, test equipment, operating equipment, medical auxiliary equipment, etc.

TOPPOWER offers various DC / DC converters in the product range with different designs and offers a suitable solution for every application.

Based on our core competence in the field of electronic components, we offer our customers a globally unique product and solution portfolio of electronic components and services.

Through our access to technology, development and knowledge, we can also offer you support in each of your development steps and thus a direct innovation advantage.

These include lighting, medical & life science, automation, aerospace, military, automotive, ship & rail, security & surveillance, communications & IT, consumer & home appliances, instrumentation and more.

You can find more information about our manufacturers here.