• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar
  • Skip to footer
  • Subscribe
  • Advertise

Power Electronic Tips

Power Electronic News, Editorial, Video and Resources

  • Products
    • Power Supplies
    • AC-DC
    • DC-DC
    • Battery Management
    • Capacitors
    • Magnetics
    • MOSFETS
    • Power Management
    • RF Power
    • Resistors
    • Transformers
    • Transistors
  • Applications
    • 5G
    • AI
    • Automotive
    • EV Engineering
    • LED Lighting
    • Industrial
    • IoT
    • Wireless
  • Learn
    • eBooks / Tech Tips
    • EE Training Days
    • FAQ
    • Learning Center
    • Tech Toolboxes
    • Webinars & Digital Events
  • Resources
    • Design Guide Library
    • Digital Issues
    • Engineering Diversity & Inclusion
    • LEAP Awards
    • Podcasts
    • White Papers
    • Design Fast
  • Video
    • EE Videos & Interviews
    • Teardown Videos
  • EE Forums
    • EDABoard.com
    • Electro-Tech-Online.com
  • Engineeering Training Days
  • Newsetter Subscription

UL/EN62368-1 certified low-profile open-frame supplies handle up to 300 W

December 9, 2019 By Aimee Kalnoskas

LHA series open-frame power suppliesCosel announced the addition of four new series of open frame, low profile, compact power supplies covering the range of 30W to 100W and UL/EN62368-1 certified. The LHA30F, LHA50F, LHA75F and LHA100F complement Cosel’s existing, leading LHA150F and LHA300F models, now offering an efficient power solution from 30W to 300W for demanding industrial applications. Benefiting from the latest power switching technologies, the LHA30-50-75-100F power supplies have a typical efficiency up to 90% high-line and 86% low-line. In addition to higher efficiency, by using partial resonance technology, noise and ripple levels have also been reduced. Designed for use in a wide range of applications, the LHA30-50-75-100F offers a wide temperature range from -10 to +70 degrees C.

Based upon 10 years of successful sales and operation of its predecessor the LFA series, the LHA series has been designed to simplify choice for systems designers when selecting power supplies for demanding applications. From the 30W LHA30F to the 300W LHA300F, the complete family is UL/EN 62368-1 certified and ready to power the latest industrial applications requiring the highest level of quality and safety.

Designed for worldwide applications, the LHA30-50-75-100F power supplies have an input voltage range of 85VAC to 264VAC single phase, and conform to the safety standards input voltage range of 100-240VAC (50/60Hz).

The 30W LHA30F is available in five output voltages, 3.3, 5, 12, 15 and 24V. Designed for an extended range of applications, the LHA50-75F is available in seven output voltages, 3.3, 5, 12, 15, 24, 36 and 48V, while the LHA100F comes in six output voltages, 5, 12, 15, 24 and 48V. Standard products are delivered with a factory trimmed output voltage though it is possible to order the LHA30-50-75-100F with a built-in potentiometer making it possible to adjust the voltage up and down (option Y).

In addition to their optimized switching topology that provides an energy efficiency figure of up to 90%, to reduce energy consumption when a unit is operating at light loads or is in standby, the LHA30-50-75-100F automatically switches to an energy saving mode using intermittent pulse modulation. This contributes to excellent performance and high reliability. The power supplies include inrush current protection, over-current protection with automatic recovery when the default is removed, and over-voltage protection.

The units can be mounted in any orientation, though depending on the ambient temperature and environment a derating may apply.

In conducted noise tests, LHA30-50-75-100F power supplies comply with FCC-B, VCCI-B, CISPR11-B, CISPR32-B, EN55011-B, and EN55032-B. For further improved noise performance COSEL offers EMI/EMC filters type EAC-03-472.

The units have a 3,000VAC input to output isolation voltage, 2,000VAC input to ground and 500VAC output to ground.

Designed for use in demanding applications where space is often limited, the LHA30F measures 50 X 27 X 87.5mm (1.97 X 1.07 X 3.44 inches) and weighs 100g maximum. The LHA50F measures 50 X 27 X 112mm (1.9 7 X 1.07 X 4.41 inches) and weighs 140g maximum. The LHA75F comes in at 50 X 27 X 150mm (1.97 X 1.07 X 5.91 inches] and weighs 190g maximum, and finally the LHA100F measures 62 X 27 X 155mm (2.44 X 1.07 X 6.10 inches] and weighs 250g maximum.

Additional options are available for specific applications, option-C for a conformal coating for improved moisture resistance, option-G for a lower leakage current (0.15mA max.), option-J4 for input and output EP connectors, and option-Y for an output voltage potentiometer.

The LHA30-50-75-100F power supplies are suitable for a wide range of applications including measurement and analysis equipment, machine tools and industrial robots, display equipment, and semiconductor manufacturing equipment.

For higher power and applications requiring EN62477-1 (OVC III) certification, models LHA150F and LHA300F are also available.

The power supplies comply with the RoHS directive and are CE marked in accordance with the Low Voltage Directive.

You may also like:

  • replacement external power supply
    Selecting a replacement external power supply – what you need…

Filed Under: Power Supplies Tagged With: coselcoltd

Primary Sidebar

Featured Contributions

Robust design for Variable Frequency Drives and starters

Meeting demand for hidden wearables via Schottky rectifiers

The case for vehicle 48 V power systems

GaN reliability milestones break through the silicon ceiling

Developing power architecture to support autonomous transportation

More Featured Contributions

EE LEARNING CENTER

EE Learning Center

EE TECH TOOLBOX

“ee
Tech Toolbox: Internet of Things
Explore practical strategies for minimizing attack surfaces, managing memory efficiently, and securing firmware. Download now to ensure your IoT implementations remain secure, efficient, and future-ready.

EE ENGINEERING TRAINING DAYS

engineering
“power
EXPAND YOUR KNOWLEDGE AND STAY CONNECTED
Get the latest info on technologies, tools and strategies for EE professionals.
“bills

RSS Current EDABoard.com discussions

  • Wireless microphone reviews
  • Why do I hear whistling sounds in my vents?
  • ISL8117 buck converter blowing up
  • 10A fuse keeps blowing on an Okamoto Surface Grinding Machine Power supply
  • Will this TL084C based current clamp circuit work?

RSS Current Electro-Tech-Online.com Discussions

  • using a RTC in SF basic
  • RS485 bus: common ground wire needed or not?
  • AC Blower Motor Speed Control
  • how can we detect a stack overflow
  • Image stitching software

DesignFast

Component Selection Made Simple.

Try it Today
design fast globle

Footer

EE World Online Network

  • 5G Technology World
  • EE World Online
  • Engineers Garage
  • Analog IC Tips
  • Battery Power Tips
  • Connector Tips
  • DesignFast
  • EDA Board Forums
  • Electro Tech Online Forums
  • EV Engineering
  • Microcontroller Tips
  • Sensor Tips
  • Test and Measurement Tips

Power Electronic Tips

  • Subscribe to our newsletter
  • Advertise with us
  • Contact us
  • About us

Copyright © 2025 · WTWH Media LLC and its licensors. All rights reserved.
The material on this site may not be reproduced, distributed, transmitted, cached or otherwise used, except with the prior written permission of WTWH Media.

Privacy Policy