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Mean Well

Mean Well HEP-320-54A Power Supply 321.3W 54V 5.95A

fanless designhigh efficiency up to 96%rugged metal case with IP65 design(IP68 option available)withstand 10G vibrationsuitable for harsh environment
SKU HEP-320-54A
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Select model — 14 in this family

HEP-320-54A
Available to order
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Overview

HEP-320-54A is the 54V output model of this series: rated current 5.95A, rated power 321.3W, typical efficiency 95%.

HEP-320 is a 320W industrial AC/DC power supply featuring the outstanding capability to operate under a harsh environment with high dust density, humidity, vibration and altitude. The entire series is housed with a robust aluminum case and fully potted with heat-conducted silicone. Thanks to state-of-the-art design, the working efficiency is up to 95%, enabling HEP-320, with a fanless design, perfectly work between -55℃ and +70℃ under free air convection.

Features

  • Universal AC input / Full range
  • Built-in active PFC function
  • High efficiency up to 95%
  • Fanless design, cooling by free air convection
  • -55~+70℃ wide operating range
  • Aluminum case and filling with heat-conducted silicone
  • IP65 design, optional IP68 rated model available
  • Meet 6KV surge immunity level
  • Withstand 10G vibration test
  • Operating altitude up to 5000 meters (Note.8)
  • Protections: Short circuit / Overload / Over voltage / Over temperature
  • 6 years warranty

Specifications

HEP-320-54ASpecifications from the official datasheet (2025-10-10 edition)

OUTPUT

DC VOLTAGE
54V
RATED CURRENT
5.95A
RATED POWER
321.3W
RIPPLE & NOISE (max.)Note.2
350mVp-p
VOLTAGE ADJ. RANGENote.5
49 ~ 58V
CURRENT ADJ. RANGENote.5
2.97 ~ 5.95A
VOLTAGE TOLERANCENote.3
±1.0%
LINE REGULATION
±0.5%
LOAD REGULATION
±0.5%
SETUP, RISE TIMENote.6
2500ms,80ms/115VAC 600ms,80ms/230VAC at full load
HOLD UP TIME (Typ.)
15ms at full load 230VAC /115VAC

INPUT

VOLTAGE RANGENote.4
90~264VAC (277VAC operational) 128~370VDC(390VDC operational)
FREQUENCY RANGE
47 ~ 63Hz
POWER FACTOR (Typ.)
PF>0.98/115VAC, PF>0.95/230VAC, PF>0.94/277VAC at full load
EFFICIENCY (Typ.)
95%
AC CURRENT (Typ.)
3.5A / 115VAC 1.65A / 230VAC 1.45A / 277VAC
INRUSH CURRENT(Typ.)
COLD START 70A at 230VAC
LEAKAGE CURRENT
<0.75mA / 277VAC

PROTECTION

OVER CURRENT
105 ~ 125% Protection type : Hiccup mode, recovers automatically after fault condition is removed
SHORT CIRCUIT
Hiccup mode, recovers automatically after fault condition is removed
OVER VOLTAGE
59 ~ 65V Protection type : Shut down and latch off o/p voltage, re-power on to recover
OVER TEMPERATURE
Shut down and latch off o/p voltage, re-power on to recover

ENVIRONMENT

WORKING TEMP.
-55 ~ +70℃ (Refer to "Derating Curve")
WORKING HUMIDITY
20 ~ 95% RH non-condensing
STORAGE TEMP., HUMIDITY
-60 ~ +80℃, 10 ~ 95% RH non-condensing
TEMP. COEFFICIENT
±0.03%/℃ (0 ~ 60℃)
VIBRATION
20 ~ 500Hz, 10G 12min./1cycle, period for 72min. each along X, Y, Z axes

SAFETY & EMC

SAFETY STANDARDSNote.8
UL62368-1,IEC62368-1, IP65 (or IP68 for HEP-320 Blank-Type), EAC TP TC 004 approved ; Design refer to BS EN/EN62368-1
WITHSTAND VOLTAGE
I/P-O/P:3.75KVAC I/P-FG:2KVAC O/P-FG:1.5KVAC
ISOLATION RESISTANCE
I/P-O/P, I/P-FG, O/P-FG:100M Ohms / 500VDC / 25℃/ 70% RH
EMC EMISSION
Compliance to BS EN/EN55032 (CISPR32) Class B, BS EN/EN61000-3-2,-3, EAC TP TC 020
EMC IMMUNITY
Compliance to BS EN/EN61000-4-2,3,4,5,6,8,11, BS EN/EN55035, light industry level (surge 6KV), EAC TP TC 020

OTHERS

MTBF
1565.6K hrs min. Telcordia SR-332 (Bellcore) ; 154.2Khrs min. MIL-HDBK-217F (25℃)
DIMENSION
252*90*43.8mm (L*W*H)
PACKING
1.88Kg; 8pcs/16Kg/0.92CUFT

Certifications & ratings

IP rating
IP65 IP68 (Optional)
Test conditions and notes9
  1. 1. All parameters NOT specially mentioned are measured at 230VAC input, rated load and 25℃ of ambient temperature.
  2. 2. Ripple & noise are measured at 20MHz of bandwidth by using a 12" twisted pair-wire terminated with a 0.1uf & 47uf parallel capacitor.
  3. 3. Tolerance : includes set up tolerance, line regulation and load regulation.
  4. 4. Derating may be needed under low input voltages. Please check the static characteristics for more details.
  5. 5. A-type only.
  6. 6. Length of set up time is measured at cold first start. Turning ON/OFF the power supply may lead to increase of the set up time.
  7. 7. The power supply is considered as a component that will be operated in combination with final equipment. Since EMC performance will be affected by the complete installation, the final equipment manufacturers must re-qualify EMC Directive on the complete installation again. (as available on https://www.meanwell.com//Upload/PDF/EMI_statement_en.pdf)
  8. 8. The ambient temperature derating of 3.5℃/1000m with fanless models and of 5℃/1000m with fan models for operating altitude higher than 2000m(6500ft).
  9. 9. The water protection level test for the IP68 rating is performed 1000mm below the surface of the water for 1 month.

Technical drawings

HEP-320-54A Block Diagram
Block Diagram
HEP-320-54A Derating Curve
Derating Curve
HEP-320-54A Mechanical Specification
Mechanical Specification

Typical applications

  • Outdoor telecommunication equipment
  • Outdoor electronic signage and billboard
  • Petroleum plant or mine shaft facility

Downloads

FAQ

Can I use the HEP-320-54A for a 54V automation panel or machine subsystem?

Yes, if the subsystem requires constant 54V DC and stays within 321.3W and 5.95A. This makes it suitable for 54V automation, industrial control, or embedded equipment that is specified for that output range.

Is the HEP-320-54A a good fit for 54V industrial electronics that need a fanless supply?

It can be, because this unit provides constant 54V output up to 5.95A and 321.3W in a fanless design. That is relevant for enclosed industrial electronics where a fanless power source is preferred and the load is sized for 54V.

Can this model support 54V embedded controllers or communications equipment?

Yes, for equipment designed to accept constant 54V input. The key sizing limits are 321.3W total output power and 5.95A maximum output current.

Is the HEP-320-54A meant for indoor or outdoor use?

This version is rated IP65 Water-Resistant, so it is intended for tougher environments than a non-sealed supply but is not the IP68 version. Its operating temperature range is -55°C to +70°C, which supports use across very wide ambient conditions when the installation environment matches the IP65 rating.

What is the difference between the HEP-320-54A and other 54V HEP series power supplies?

In the HEP-320 series, the HEP-320-54A and HEP-320-54 share the same 54V, 5.95A, 321.3W rating. The HEP-320-54A is the IP65 A-Type, with output voltage (49 ~ 58V) and current level (2.97 ~ 5.95A) adjustable through an internal potentiometer, while the HEP-320-54 is the IP68 Blank-Type.

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Mean Well HEP-320-54A Power Supply 321.3W 54V
Mean Well

Mean Well HEP-320-54A Power Supply 321.3W 54V 5.95A

Log in to see price

HEP-320-54A is the 54V output model of this series: rated current 5.95A, rated power 321.3W, typical efficiency 95%.

HEP-320 is a 320W industrial AC/DC power supply featuring the outstanding capability to operate under a harsh environment with high dust density, humidity, vibration and altitude. The entire series is housed with a robust aluminum case and fully potted with heat-conducted silicone. Thanks to state-of-the-art design, the working efficiency is up to 95%, enabling HEP-320, with a fanless design, perfectly work between -55℃ and +70℃ under free air convection.

Features

  • Universal AC input / Full range
  • Built-in active PFC function
  • High efficiency up to 95%
  • Fanless design, cooling by free air convection
  • -55~+70℃ wide operating range
  • Aluminum case and filling with heat-conducted silicone
  • IP65 design, optional IP68 rated model available
  • Meet 6KV surge immunity level
  • Withstand 10G vibration test
  • Operating altitude up to 5000 meters (Note.8)
  • Protections: Short circuit / Overload / Over voltage / Over temperature
  • 6 years warranty

Typical applications

  • Outdoor telecommunication equipment
  • Outdoor electronic signage and billboard
  • Petroleum plant or mine shaft facility

Model

  • 100W 54V
  • 100W 54V Adjustable
  • 150W 54V
  • 150W 54V Adjustable
  • 185W 54V
  • 185W 54V Adjustable
  • 240W 54V
  • 240W 54V Adjustable
  • 320W 54V
  • 320W 54V Adjustable
  • 480W 54V
  • 480W 54V Adjustable
  • 600W 54V
  • 600W 54V Adjustable
View product

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