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POWERBOX Marine Line PT578 Series

  • Marine Supply up to 500W
  • GL approved for bridge use (pending)
  • EN60945 compliant
  • Efficiency above 93%
  • Active Power Factor Correction
  • Overload and overvoltage protection
  • Thermal overload protection
  • Conformal coating
  • DC OK potential free contact
  • Cooling by free air convection
  • DIN-Rail mounting on back or side
  • RoHS compliant
  • Internal redundancy diode
  • Single or parallel mode user selectable

PT578 Series

Product Overview

POWERBOX Marine Line 500 

500W AC/DC DIN-Rail for Marine and Off Shore Applications 

Description   Powerbox Marine Line PT578 power supplies for marine, offshore and demanding industrial applications have DIN-rail mounting and GL approval for ship bridges placement (EN60945). In addition the products meet requirements set for tough environmental standards, which makes them suitable for demanding areas.


Input voltage 90 - 265 VAC, 125 - 375 VDC
Frequency 47 - 63 Hz, 440 Hz with reduced PFC.
Inrush current 30 A; cold start @ 230 VAC / 25°C
Input current <1.3 A @ 230Vac
Input fuse 10 AT; internal, not user serviceable
Efficiency >93%
Leakage current < 3.5 mA.
Output Voltage 24 V, adjustable 23 - 29 V
Output power 500 W.
Peak power 750W (10s)..
Minimum load 0 A
Load Regulation ±0.5%.
Temperature coefficient ±0.02%/°C.
Overvoltage protection 24 V model 32 V
Overload protection User selectable (see table 1).
Peak short circuit current 40 A (< 100 ms).
Overtemp. protection +90°C internal temp.
Turn-on delay < 2 s @ 90 VAC.
DC OK signalling

LED on front:

Green = DC OK

Flashing Red = Overload

Red = DC Fail

Potential free contact;

active closed; I < 1 A.

open voltage < 30V.

Isolation voltage

3000 VAC Input/Output.

2000 VAC Input/Chassis.

Weight < 1.8 kg.
Dimensions (LxWxH)

132 x 67 x 128 mm. (H x W x D) .

Excluding DIN-Rail mounting device.

Add 10mm for standard mounting device and

EN50022 DIN-Rail.

Warranty 2 Years.
Operating temperature –25 to +70°C without derating.
Storage temperature –40°C to +85°C.

Up to 100% condensing at all relevant

temperatures. Conformal coating.


DNV-GL table 7 High vibration strain, class B,

±1.6mm displacement, 2-25Hz, 4g; 25-100Hz

(1 octave/min).


10,000 feet; operating.

30,000 feet; non-operating.

EMC Emissions EN60945 conducted & radiated.
Harmonics EN61000-3-2 compliant.
ESD EN61000-4-2 Air ±8kV, Contact ±6kV.
Electromagnetic fields EN61000-4-3 10V/m 8MHz-2GHz.
EFT/Burst EN61000-4-4 2kV.
Surge EN61000-4-5 Line-Line 0.5kV, Line-GND 1kV
Conducted immunity EN61000-4-6 3VRMS 150kHz-80MHz
Conducted LF

IEC60533 3VRMS 50Hz-12kHz.

HV immunity

IEC60947-2 2kV, 60s



Temperature, class D –25°C to +55°C.

Humidity, class B, up to 100%.

Vibration, class B, ±1.6mm displ. 2-25Hz,

4g 25-100Hz.

HV immunity

IEC60947-2 2kV, 60s


Class B, bridge and open deck.

Class guideline

DNVGL-CG-0339, November 2015.


EMC Directive 2014/30/EU.

Low Voltage Directive is 2014/35/EU

Technical Illustration

  • PT578 - Mechanical PT578 - Mechanical
  • PT578 - Pin Connection PT578 - Pin Connection
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