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PU300 SERIES DC-DC Converters - PU300-PU500 SERIES

  • 216W - 300W
  • Industrial Grade Converter Optimized input voltage ranges
  • Input ranges from 10 to 270Vdc
  • Single outputs from 12 to 60Vdc
  • Reverse input voltage protection
  • Fully encapsulated meets IP20
  • Overvoltage Protection OVP
  • Extra output with series diode
  • Over/under voltage alarm with relay output
  • Output voltage adjustable from front panel
  • 19' Rack Mount or Wall Mount

DC-DC Converters - PU300-PU500 SERIES

Product Overview


POLYAMP  DC/DC Industrial Converters

Polyamp provide free standing DC/DC converters, which means they meet EMC, EMI, electrical safety requirements and can be installed in any weather protected environment. The units are air cooled, convection cooled and can mostly be mounted in any direction.

The EMC performance is such they can be mounted in low noise applications. The output ripple is among the industries lowest. The immunity levels meet tough requirements in substations, trains, vehicles, railway and industrial applications. We have also models that meet EN50022 special low noise Telecom environment.

The mechanics are based on sturdy aluminum cases, that provides conduction cooling, mechanical stability for any type of vehicles, trains, locos, ships, marine, military rubber wheel vehicles. All units can be mounted on chassis, mounting plate, wall also with TS35 DIN rail. Most units are 19"-rack modular 2U, 3U, 6U.

Polyamp can provide special mechanics solution and systems based on our units, as well as Secure 2x N+1 redundant systems for power utilities, off shore applications and many more.

Polyamp production system is ISO9001:2008 certified


Input voltages

A: 10-30Vdc

B: 20-60Vdc

C: 50-150Vdc

D: 90-270Vdc

Output voltages See Selection Table
Adjustment range 95%–110%, Adjustment with 15 turn potentiometer
Output ripple Typ 15mVp-p (80kHz)
Source regulation 0.1%
Load regulation 0.2% (0 - 100%) load
Temperature coefficient 0.02% per °C
Current limit 105% Rectangular
Remote sense Yes
Transient recovery <3ms. Load step to within 3% of nominal output voltage  for 10% to 90%
Soft start Yes
Startup time, type 1 sec.
Holdup time 2–25ms
Efficiency 77%–88%
Design topology Push-pull
Switching frequency 40kH
Reverse input
voltage protection
Parallel diode, Code (A) (B) (24) (48)
Series diode, Code (C) (D) (110) (220)

Input- Output: 2kVdc (input code A,B)

Input- Output: 2.5kVac / 4kVdc (input code C,D)

Input- Case: 2kVdc (input code A,B)

Input- Case: 2.5kVac / 4kVdc (input code C,D)

Output- Case: 2kVdc (all outputs)

Operating temperature Range at 100% load: -25°C to +55°C 100% load
Conduction cooling width:260px; height:27px">With derating: -25°C to +70°C
Storage temperature range -40°C to +85°C
Overvoltage protection OVP The output voltage is limited to 15% over nominal output voltage by a extra regulated circuit
Voltage Sense External output voltage sense used when the voltage regulation at the load is critical. The sense can compensate voltage drops up to 5% of the nominal voltage
Remote sense External sense is used when the voltage regulation at the loa is critical. The sense can compensate voltage drops up to 5% of nominal voltage

Extra Output

with series diode

Use the series diode output when the output is connected in parallel with other power suppies to achieve redundancy
Voltage Alarm Over / Under voltage alarm built in relay changes state if converter output voltage is not with 90% to 115% of nominal output. User selects NO or NC relay function. The relay is rated 30V 0.5A
Conformally coating For environment with high non condensing humidity, max 98% RH
Inrush current Inrush current limit with NTC, reduces the inrush current during start up.  The input votlage range will be affected.  Only available on C & D inputs.
Mounting Options See Technical Illustrations
Safety standards IEC950, EN60950, CE LVD 73/23/EEC
C-Tick AS/NZS CISPR11 Group 1, Class A
EMC standards EN/IEC 61000-6-2, EN/IEC 61000-4-2,
EN/IEC 61000-4-3, EN/IEC 61000-4-4,
EN/IEC 61000-4-5, EN/IEC 61000-4-6
EMI standards EN/IEC 61000-6-3
EN55011/EN55022 Level B
Dimensions 86 x 210 x 232mm, See Technical Illustration
Weight 4.2kg
Mounting brackets Supplied with L86-1 mounting bracket,  See Technical Illustration

Selection Table

PU300A12 10-30V 12V 18A 216W
PU300A13.8 10-30V 13.8V 16A 220W
PU300A15 10-30V 15V 16A 240W
PU300A24 10-30V 24V 10A 240W
PU300A28 10-30V 28V 8.58A 240W
PU300A36 10-30V 36V 6.67A 240W
PU300A48 10-30V 48V 5A 240W
PU300A60 10-30V 60V 4A 240W
PU300B12 20-60V 12V 25A 300W
PU300B13.8 20-60V 13.8V 21.8A 300W
PU300B15 20-60V 15V 20A 300W
PU300B24 20-60V 24V 12.5A 300W
PU300B28 20-60V 28V 10.8A 300W
PU300B36 20-60V 36V 8.34A 300W
PU300B48 20-60V 48V 6.25A 300W
PU300B60 20-60V 60V 5A 300W
PU300C12 50-150V 12V 25A 300W
PU300C13.8 50-150V 13.8V 21.8A 300W
PU300C15 50-150V 15V 20A 300W
PU300C24 50-150V 24V 12.5A 300W
PU300C28 50-150V 28V 10.8A 300W
PU300C36 50-150V 36V 8.34A 300W
PU300C48 50-150V 48V 6.25A 300W
PU300C60 50-150V 60V 5A 300W
PU300D12 90-270V 12V 25A 300W
PU300D13.8 90-270V 13.8V 21.8A 300W
PU300D15 90-270V 15V 20A 300W
PU300D24 90-270V 24V 12.5A 300W
PU300D28 90-270V 28V 10.8A 300W
PU300D36 90-270V 36V 8.34A 300W
PU300D48 90-270V 48V 6.25A 300W
PU300D60 90-270V 60V 5A 300W

Technical Illustration

  • PU300 - PU500 PU300 - PU500
  • PU300 Mounting Option PU300 Mounting Option
  • PU500 Mounting Option PU500 Mounting Option
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