Power > CHB300-300SXX-CMFC Series
CHB300-300Sxx CMFC(D) Series

CHB300-300SXX-CMFC Series

Input: 180 to 425V dc
Outputs: 5V to 48V dc
Power: 300 Watt
Built in EMC Filter
3000V ac reinforced isolation

Make an enquiry

Make an Enquiry

  • This field is for validation purposes and should be left unchanged.
have a question? Contact us now


The CHB300-300SXX-CMFC(D) series of chassis mountable DC-DC converters offers 300 watts of output power @ single output voltages of 5, 12, 24, 28, 48VDC. It has a wide (2:1) input voltage range of 180 to 425VDC (300VDC nominal) and 3000VAC renforced isolation.

High efficiency up to 90%, allowing case operating temperature range of –40°C to 100°C. An external heat sink is required to extend the full power range of the unit. Very low no load power consumption (10mA), an ideal solution for energy critical systems. Built-in EMI EN55032 (EN55022) filter. Meet EN45545.

The standard control functions include remote on/off (positive or negative) and +10%, -20% adjustable output voltage.

Fully protected against input UVLO (under voltage lock out), output over-current, output over-voltage and overtemperature and continuous short circuit conditions.

CHB300-300SXX-CMFC(D) series is designed primarily for common applications of 300V nominal voltage and also suitable for distributed power architectures, telecommunications, battery operated equipment and industrial applications.

180V-425V dc5V300W
180V-425V dc12V300W
180V-425V dc24V300W
180V-425V dc28V300W
180V-425V dc48V300W


Click on the link below for an instant download.

  • CHB300-300Sxx CMFC Series Datasheet
  • CHB300-300Sxx CMFC Series Application Notes

We would love to know more about the problem you are trying to solve

Our experts are on hand to help you find the best solution!

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.

sign up for our newsletter

Enter your email address below

  • This field is for validation purposes and should be left unchanged.
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.'); } });