New Industry Products

COSEL Debuts Two Power Supplies With 200% Peak Power Capabilities

September 05, 2021 by Gary Elinoff

Designed with safety in mind, the new devices are cooled via free air convection and offer typical efficiencies of 93%

The LHP150F (150W) and the LHP300F (300W) are certified to meet the EN62477-1 (OVC III) standard. Each operates over input ranges of 85 to 264VAC and offers single output voltages of 24V, 30V, 36V, 42V, or 48V, which are adjustable via a built-in potentiometer.

The LHP150F and the LHP300 Power Supplies. Image courtesy of COSEL

Aimed at industrial applications, the new power supplies can deliver 200% of their rated power for a period of up to 10 seconds to accommodate dynamic loads. This is of vital importance because industrial applications often require greater power during system start-up or during peak periods. The situation is illustrated in an example cited by COSEL involving the LHP150F. This unit, which can deliver 24 volts at around 6.3 amps (150 watts) continuously, is capable of supplying twice that current, or 12.6 amps, for the specified 10 seconds.


Harmonics and Power Factor Correction

The LHP150F and the LHP300 feature active Power Factor Corrector (PFC), and the switching stage employs LLC resonant topology. These contribute to the devices’  low harmonic current distortions.


Connected Directly to the Main Distribution Panel

Industrial applications require power supplies to be able to function safely in a wide variety of situations and environments. Their certification to the EN62477-1 Over Voltage Category Three (OVC III) standard assures designers that equipment powered by the LHP150F and LHP300F can be connected directly to the main distribution panel, with no extra level of isolation needed. This greatly simplifies the systems designer’s task, reducing both costs and final solution size.


Protections and Isolation

The units field protections for overvoltage, overcurrent, and excessive inrush current. They also feature isolation ratings of:

  • Input to ground (FG) protection of 2,000VAC 

  • Input to output isolation of 3,000VAC

  • Output to ground (FG) of 500VAC 


Available Options

These include:

  • Coating (C)

  • Low leakage current (G)

  • EP connector type (J4)

  • Remote ON/OFF (R)

  • Chassis (S)

  • Chassis and Cover (SN)

  • Terminal block type (T)

  • Connector to an external capacitor bank (U1)

  • Output 8 pin connector is available for the LHP300 only (J5)

  • Push-in terminal block (T4)

  • Built-in DC fuse (DC)

See the Instruction Manual for more detail on these and other features.


Physical Considerations

  • The standard product is available in an open-frame PCB configuration, with a chassis and a cover available as options

  • The power supplies are optimized for convection cooling and can be operated over a temperature range of -10 to +70 ℃ ambient. Depending on ventilation, derating may apply 

For open frame types:

  • The LHP150F measures 75 x 27 x 160mm (2.95 x 1.07 x 6.30 inches and weighs 320g max. 

  • The LHP300F measures 84 x 37 x 180mm (3.31 x 1.46 x 7.09 inches) and weighs 580g max.


Regulatory and Safety

In addition to EN62477-1 (OVC III) standard, the two new power supplies comply with:

  • UL62368-1

  • C-UL (equivalent to CAN/CSA-C22.2 No.62368-1)

  • EN62368-1

  • UL (USA)

  • C-UL (Canada)

  • DEMKO (Denmark)

  • TUV (Germany)



  • RoHS


  • European low voltage directives