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Mean Well

Mean Well HEP-480-54A Power Supply 321.3W 54V 8.9A

fanless designhigh efficiency up to 96%rugged metal case with IP65 design(IP68 option available)withstand 10G vibrationsuitable for harsh environment
SKU HEP-480-54A
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Select model — 14 in this family

HEP-480-54A
Available to order
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Overview

HEP-480-54A is the 54V output model of this series: rated current 8.9A, rated power 480.6W, typical efficiency 95%.

HEP-480 is a 480W industrial AC/DC power supply featuring the outstanding capability to operate under highly humid, dusty, oily, and high-vibration harsh environment. The entire series is housed with the 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-480 perfectly work between -55℃ and +65℃ 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~+65℃ 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.7)
  • Protections: Short circuit / Overload / Over voltage / Over temperature
  • 6 years warranty

Specifications

HEP-480-54ASpecifications from the official datasheet (2025-10-10 edition)

OUTPUT

DC VOLTAGE
54V
RATED CURRENT
8.9A
RATED POWER
480.6W
RIPPLE & NOISE (max.)Note.2
350mVp-p
VOLTAGE ADJ. RANGENote.5
45.9 ~ 56.7V
CURRENT ADJ. RANGE
4.4 ~ 8.9A
VOLTAGE TOLERANCENote.3
±1.0%
LINE REGULATION
±0.5%
LOAD REGULATION
±0.5%
SETUP, RISE TIMENote.4
500ms, 80ms 115VAC/230VAC
HOLD UP TIME (Typ.)
16ms 115VAC/230VAC

INPUT

VOLTAGE RANGENote.5
90~264VAC (277VAC operational) 128~370VDC(390VDC operational)
FREQUENCY RANGE
47 ~ 63Hz
POWER FACTOR (Typ.)
PF≧0.98/115VAC, PF≧0.97/230VAC, PF≧0.95/277VAC at full load
EFFICIENCY (Typ.)
95%
AC CURRENT (Typ.)
5A / 115VAC 2.45A / 230VAC 2A/277VAC
INRUSH CURRENT(Typ.)
COLD START 35A at 230VAC
LEAKAGE CURRENT
<0.75mA / 277VAC

PROTECTION

OVER CURRENT
105 ~ 125% Constant current limiting, recovers automatically after fault condition is removed
SHORT CIRCUIT
Constant current limiting, recovers automatically after fault condition is removed
OVER VOLTAGE
60 ~ 70V Shut down output voltage, re-power on to recover
OVER TEMPERATURE
Shut down output voltage, re-power on to recover

ENVIRONMENT

WORKING TEMP.
-55 ~ +65℃ (Refer to "Derating Curve")
WORKING HUMIDITY
20 ~ 95% RH non-condensing
STORAGE TEMP., HUMIDITY
-60 ~ +80℃, 10 ~ 95% RH non-condensing
TEMP. COEFFICIENT
±0.02%/℃ (0 ~ 60℃)
VIBRATION
20 ~ 500Hz, 10G 12min./1cycle, period for 72min. each along X, Y, Z axes

SAFETY & EMC

SAFETY STANDARDSNote.7
UL62368-1,IEC62368-1, IP65 (or IP68 for HEP-480 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
1036.8K hrs min. Telcordia SR-332 (Bellcore) ; 89.8Khrs min. MIL-HDBK-217F (25℃)
DIMENSION
262*125*43.8mm (L*W*H)
PACKING
2.8Kg;4pcs/11.5Kg/0.55CUFT
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. Length of set up time is measured at cold first start. Turning ON/OFF the power supply may lead to increase of the setup time.
  5. 5. Derating may be needed under low input voltages. Please refer to the “STATIC CHARACTERISTICS” for more details.
  6. 6. The power supply shall be regarded as one component of the final system. The EMC performance will be affected by the complete system installation and/or configuration, the final system manufacturers must re-verify overall EMC directive with the complete installation and/or configuration. (as available on https://www.meanwell.com//Upload/PDF/EMI_statement_en.pdf)
  7. 7. The water protection level test for the IP68 rating is performed 1000mm below the surface of the water for 1 month.
  8. 8. Please refer to the warranty statement on MEAN WELL's website at http://www.meanwell.com
  9. 9. 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).

Technical drawings

HEP-480-54A Block Diagram
Block Diagram
HEP-480-54A Derating Curve
Derating Curve
HEP-480-54A Mechanical Specification
Mechanical Specification
HEP-480-54A ※Blank-Type (optional model)
※Blank-Type (optional model)
HEP-480-54A For Others
For Others

Typical applications

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

Downloads

FAQ

Can the HEP-480-54A be used for 54V DC automation equipment?

Yes, for equipment that requires constant-voltage 54V DC and draws no more than 8.9A. With 480.6W output capacity, it is positioned for higher-load 54V systems rather than compact low-power controls.

Is this power supply a fit for 54V communications or network hardware?

It can be a fit for communications or network hardware that is specified for a regulated 54V DC source. The supply accepts 90-264VAC input (277VAC operational) and delivers constant-voltage 54V output, which is useful when the incoming AC source may vary by site.

Can I use the HEP-480-54A in rugged embedded or OEM systems?

Yes, if the system is built around 54V constant-voltage power and remains within 480.6W total demand. The 95% typical efficiency, IP65 rating, and 10G vibration specification support use in sealed or maintenance-sensitive equipment.

Is the HEP-480-54A rated for demanding indoor and outdoor conditions?

This model carries an IP65 water-resistant rating and operates from -55°C to +65°C (with load derating at higher temperatures), so it is suitable for tough industrial environments with dust, spray, and wide temperature swings. It is also specified to withstand 10G vibration for harsher service conditions.

Where does the HEP-480-54A fit in the HEP-54V series?

Within the HEP-480 series, the HEP-480-54A is the 54V model at 480.6W and 8.9A, the highest-voltage, lowest-current option next to the 24V, 36V and 48V versions. It is the A-type, with built-in potentiometers for 45.9-56.7V voltage and 4.4-8.9A current adjustment and an IP65 rating; the HEP-480-54 Blank-Type is the IP68 alternative without adjustment.

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Mean Well HEP-480-54A Power Supply 321.3W 54V
Mean Well

Mean Well HEP-480-54A Power Supply 321.3W 54V 8.9A

Log in to see price

HEP-480-54A is the 54V output model of this series: rated current 8.9A, rated power 480.6W, typical efficiency 95%.

HEP-480 is a 480W industrial AC/DC power supply featuring the outstanding capability to operate under highly humid, dusty, oily, and high-vibration harsh environment. The entire series is housed with the 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-480 perfectly work between -55℃ and +65℃ 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~+65℃ 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.7)
  • 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
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