Actuator control – CHB100W Series

"We want a DC DC Converter for our solar power installations"


Our customer wanted a 75W dc dc converter to replace an existing ac dc power supply within an actuator used for fluid valve control.

The actuators had to be driven from a dc source derived from solar panel and would be fitted in remote sites with no access to mains electricity.

The dc dc converter had to meet the following unique requirements

  • Size constraints, with connectors in specific points
  • Heat had to dissipated into the main casting
  • Protection against motor generated back emfs and lightning strikes.

Protection against reverse polarity protection

  • CHB100W Series

    Input: 9-36V or 18-75V dc
    Outputs: 3V to 48V dc
    Power:100 Watt
    Tamb: -40°C to +100°C
    Dims: Half Brick
    UL / CE EN60950 Approved


The CHB100W conduction cooled half brick dc dc converters sourced from Cincon were the ideal building blocks for this application.  They are compact and designed specifically for conduction cooling.

We recommended the addition of a custom cooling plate and EMC filtering designed to withstand the demands of large electrical surges and issues from  back EMFs associated with inductive loads.  We were able to offer a simple and effective turnkey solution within the customer’s cost target.

  • CQB100W Series

    Input: 9-36V or 18-75V dc
    Outputs: 3V to 48V dc
    Power: 100 Watt
    Tamb: -40°C to +100°C
    Dims: Quarter Brick
    1500V dc Isolation
    Safety Meets IEC/EN/UL 62368-1


Over 8 weeks we shared layout information and breadboard test data before shipping the first working units.

We then supported the customer throughout their own performance and EMC tests where we were able to modify and cost reduce the units further to provide an optimised solution.

  • CQE50W Series

    Input: 9-36V or 18-75V dc
    Outputs: 5V to 48V dc
    Power: 60 Watt
    Tamb: -40°C to +100°C
    Dims: Quarter Brick
    3000V dc isolation

LET’S MAKE THIS EASY. CALL 01929 555 700

why choose relec?
  • Faster

    Our aim is to get back to you with an initial response within the hour.

  • Attention to detail

    We pride ourselves on getting you the right product, at the right price and on time.

  • New ideas

    We are constantly looking for latest technology and products for your applications.

  • Beyond standard

    It’s not just about the product.  Our service goes way beyond the norm.

  • Easy

    We want to make your life as simple as it can be. Call us to find out what we can offer.

jQuery(document).ready(function($) { function updateActiveItem() { try { var carouselItems = $('.center-grow-carousel .elementor-carousel-item'); var centerIndex = Math.floor(carouselItems.length / 2); carouselItems.each(function(index) { if (index === centerIndex) { $(this).addClass('active'); } else { $(this).removeClass('active'); } }); } catch (error) { console.error('Error updating active item:', error); } } // Initial update updateActiveItem(); // Update on slide change var carousel = $('.center-grow-carousel .elementor-swiper'); if (carousel.length) { carousel.on('transitionend animationend', function() { updateActiveItem(); }); } else { console.error('Carousel element not found.'); } });