Mean Well HEP-320-12 Power Supply 264W 12V | Auckland, New Zealand

Overview

HEP-320-12 is the 12V output model of this series: rated current 22A, rated power 264W, typical efficiency 91%.

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-320-12Specifications from the official datasheet (2025-10-10 edition)

OUTPUT

DC VOLTAGE: 12V
RATED CURRENT: 22A
RATED POWER: 264W
RIPPLE & NOISE (max.)^Note.2: 150mVp-p
VOLTAGE ADJ. RANGE^Note.5: 10.8 ~ 13.5V
CURRENT ADJ. RANGE^Note.5: 11 ~ 22A
VOLTAGE TOLERANCE^Note.3: ±3.0%
LINE REGULATION: ±0.5%
LOAD REGULATION: ±2.0%
SETUP, RISE TIME^Note.6: 2500ms,80ms/115VAC 600ms,80ms/230VAC at full load
HOLD UP TIME (Typ.): 15ms at full load 230VAC /115VAC

INPUT

VOLTAGE RANGE^Note.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.): 91%
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: 14 ~ 17V 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 STANDARDS^Note.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. All parameters NOT specially mentioned are measured at 230VAC input, rated load and 25℃ of ambient temperature.
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. Tolerance : includes set up tolerance, line regulation and load regulation.
4. Derating may be needed under low input voltages. Please check the static characteristics for more details.
5. A-type only.
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. 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. 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. The water protection level test for the IP68 rating is performed 1000mm below the surface of the water for 1 month.

Technical drawings

HEP-320-12 Block Diagram — Block Diagram

HEP-320-12 Derating Curve — Derating Curve

HEP-320-12 Mechanical Specification — Mechanical Specification

Typical applications

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

Downloads

Certificates5

Mean Well HEP-EAC Certificate PDF Download

Mean Well HEP-320-CB(UL) Certificate PDF Download

Mean Well HEP-320-EMC Certificate PDF Download

Mean Well HEP-320-CE-dec Certificate PDF Download

Mean Well HEP-320-UK-dec Certificate PDF Download

Test reports1

Mean Well HEP-320-12 Test Report PDF Download

Catalogues1

Mean Well Catalog (Industrial) PDF Download

FAQ

Can I use the HEP-320-12 for a 12V industrial control panel with multiple loads?

Yes, this model is a 12V constant voltage power supply rated for 264W and 22A, which suits larger 12V control panels with multiple devices sharing the same 12V bus. It is better matched to systems that need higher available current than lower-power 12V supplies.

Is the HEP-320-12 suitable for 12V automation equipment in harsh environments?

It is designed for harsh conditions, with IP68 protection, a fanless design, and a stated ability to withstand 10G vibration. The operating temperature range of -55°C to +70°C also supports demanding industrial and outdoor environments.

Can this 12V power supply run higher-current embedded or vehicle-adjacent 12V electronics?

It can support 12V electronics that need a stable constant voltage source up to 22A and 264W. That makes it a fit for heavier 12V embedded loads where lower-power 12V models may not provide enough current headroom.

Can I use the HEP-320-12 for 12V LED or signage systems that need more than 16A?

Yes, this unit provides 12V at up to 22A, so it covers constant-voltage 12V loads that need more than 16A. Its 264W capacity also makes it suitable when the total 12V load is above what smaller 12V power supplies can deliver.

Is the HEP-320-12 appropriate for outdoor or washdown locations?

This version is rated IP68, so it is better suited to wet, dusty, and outdoor environments than water-resistant indoor-only designs. Its -55°C to +70°C operating range also supports very cold and very hot installation areas.

How does the HEP-320-12 compare with the other HEP-320 models?

Within the HEP-320 range, the 12V model is 264W at 22A, the 15V model is 285W at 19A, the 24V model is 320.16W at 13.34A, the 36V model is 320.4W at 8.9A, the 48V model is 321.6W at 6.7A, and the 54V model is 321.3W at 5.95A. The A variants mirror those same electrical ratings in the sibling list, while this unit is the IP68 version.

Payment & Security

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Model	Power	Voltage	Current
Mean Well HEP-320-54A Power Supply 321.3W 54V 5.95A	321.3W	54V	5.95A	View
Mean Well HEP-320-54 Power Supply 321.3W 54V 5.95A	321.3W	54V	5.95A	View
Mean Well HEP-320-48A Power Supply 321.6W 48V 6.7A	321.6W	48V	6.7A	View
Mean Well HEP-320-48 Power Supply 321.6W 48V 6.7A	321.6W	48V	6.7A	View
Mean Well HEP-320-36A Power Supply 320.4W 36V 8.9A	320.4W	36V	8.9A	View
Mean Well HEP-320-36 Power Supply 320.4W 36V 8.9A	320.4W	36V	8.9A	View
Mean Well HEP-320-24A Power Supply 320.16W 24V 13.34A	320.16W	24V	13.34A	View
Mean Well HEP-320-24 Power Supply 320.16W 24V 13.34A	320.16W	24V	13.34A	View
Mean Well HEP-320-15A Power Supply 285W 15V 19A	285W	15V	19A	View
Mean Well HEP-320-15 Power Supply 285W 15V 19A	285W	15V	19A	View
Mean Well HEP-320-12A Power Supply 264W 12V 22A	264W	12V	22A	View

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Mean Well HEP-320-12 Power Supply 264W 12V 22A

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Overview

Features

Specifications

OUTPUT

INPUT

PROTECTION

ENVIRONMENT

SAFETY & EMC

OTHERS

Certifications & ratings

Technical drawings

Typical applications

Downloads

Certificates5

Test reports1

Catalogues1

FAQ

Payment & Security

Other HEP-320 Models

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Mean Well HEP-320-12 Power Supply 264W 12V 22A

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