Image shown is a representation only. Exact specifications should be obtained from the product datasheet.

Mean Well EPS-45-12 Power Supply 45W 12V 3.75A

Name: Mean Well EPS-45-12 Power Supply 45W 12V 3.75A
Brand: Mean Well
SKU: EPS-45-12
Price: 16.88 USD
Availability: InStock

4" x 2"high efficiencyoptional L-bracket and coverno load power consumption<0.3W

SKU EPS-45-12

$16.88 USD

Shipping calculated at checkout.

In stock

Overview

EPS-45-12 is the 12V output model of this series: rated current 3.75A, rated power 45W, typical efficiency 87%. Type Blank: Blank=PCB only.

Features

Universal AC input / Full range
Optional L-Bracket and cover
High efficiency up to 90%
Protections: Short circuit / Overload / Over voltage
Cooling by free air convection
4"×2" compact size
LED indicator for power on
No load power consumption<0.3W
Operating altitude up to 4000 meters
3 years warranty

Specifications

EPS-45-12Specifications from the official datasheet (2026-03-31 edition)

OUTPUT

DC VOLTAGE: 12V
RATED CURRENT: 3.75A
CURRENT RANGE: 0 ~ 4.2A
RATED POWER: 45W
PEAK LOAD(10sec.)^Note.6: 50.4W
RIPPLE & NOISE (max.)^Note.2: 120mVp-p
VOLTAGE ADJ. RANGE: 10.8 ~ 13.5V
VOLTAGE TOLERANCE^Note.3: ±2.0%
LINE REGULATION: ±0.5%
LOAD REGULATION: ±1.0%
SETUP, RISE TIME: 1000ms, 50ms/230VAC 2000ms, 50ms/115VAC at full load
HOLD UP TIME (Typ.): 50ms/230VAC 16ms/115VAC at full load

INPUT

VOLTAGE RANGE^Note.5: 90 ~ 264VAC 127 ~ 370VDC [DC input operation possible by connecting AC/N(+), AC/L(-)]
FREQUENCY RANGE: 47 ~ 63Hz
EFFICIENCY (Typ.): 87%
AC CURRENT (Typ.): 1.8A/115VAC 1 A/230VAC
INRUSH CURRENT (Typ.): COLD START 60A/230VAC
LEAKAGE CURRENT: <2mA/240VAC

PROTECTION

OVER LOAD: 115 ~ 160% rated output power Protection type : Hiccup mode, recovers automatically after fault condition is removed
OVER VOLTAGE: 13.8 ~ 16.2V Protection type : Shut down o/p voltage, re-power on to recover

ENVIRONMENT

WORKING TEMP.: -30 ~ +70℃ (Refer to output load derating curve)
WORKING HUMIDITY: 20 ~ 90% RH non-condensing
STORAGE TEMP., HUMIDITY: -40 ~ +85℃, 10 ~ 95% RH
TEMP. COEFFICIENT: ±0.03%/℃ (0 ~ 50℃)
OPERATING ALTITUDE^Note.7: 4000 meters
VIBRATION: 10 ~ 500Hz, 2G 10min./1cycle, period for 60min. each along X, Y, Z axes

SAFETY & EMC (Note 4)

SAFETY STANDARDS: UL62368-1, TUV BS EN/EN62368-1, CCC GB4943.1, EAC TP TC 004 approved
WITHSTAND VOLTAGE: I/P-O/P:3KVAC I/P-FG:2KVAC O/P-FG:0.5KVAC
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, GB9254.1 Class B,GB17625 Class A,EAC TP TC 020
EMC IMMUNITY: Compliance to BS EN/EN61000-4-2,3,4,5,6,8,11, BS EN/EN55035, heavy industry level, EAC TP TC 020

OTHERS

MTBF: 2981.8K hrs min. Telcordia SR-332 (Bellcore) ; 652.4K hrs min. MIL-HDBK-217F (25℃)
DIMENSION: PCB:101.6*50.8*29mm (L*W*H) ; with optional CASE:103.4*62*37mm (L*W*H)
PACKING: PCB: 0.14Kg; 96pcs/ 14.5Kg/1.39CUFT ; with optional CASE: 0.3Kg; 45pcs/ 14.5Kg/0.63CUFT

MODEL ENCODING

Blank (this model): Blank=PCB only
C: Enclosed type

Test conditions and notes7

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 0.1μF & 47μF parallel capacitor.
3. Tolerance : includes set up tolerance, line regulation and load regulation.
4. Derating may be needed under low input voltage. Please check the static characteristics for more details.
5. 33% Duty cycle maximum within every 30 seconds. Average output power should not exceed the rated power.
6. The power supply is considered a component which will be installed into a final equipment. All the EMC tests are been executed by mounting the unit on a 360mm*360mm metal plate with 1mm of thickness. The final equipment must be re-confirmed that it still meets EMC directives. For guidance on how to perform these EMC tests, please refer to “EMI testing of component power supplies.” (as available on https://www.meanwell.com//Upload/PDF/EMI_statement_en.pdf )
7. 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

EPS-45-12 Mechanical Specification — Mechanical Specification

EPS-45-12 Output Derating — Output Derating

Downloads

Datasheet1

EPS-45-12 datasheetEPS-45-SPEC.PDF · 2026-03-31 edition PDF Download

Certificates4

EMC Certificate (ELG-75)(EN) PDF Download

UL Certificate (EPS-45)(EN) PDF Download

TUV Certificate (EPS-45)(EN) PDF Download

EMC Certificate (EPS-45)(EN) PDF Download

Test reports1

Test Report (EPS-45-12)(EN) PDF Download

Catalogues1

Mean Well Catalog (Industrial) PDF Download

FAQ

Can I use the EPS-45-12 for a 12V PLC accessory or industrial control device?

Yes, if the equipment is designed for constant-voltage 12V DC and its total draw stays within 3.75A and 45W. That makes it suitable for many low-power PLC accessories, relays, interface modules, and control electronics.

Is the EPS-45-12 a fit for a 12V HMI, operator panel, or embedded panel computer?

It can be, when the device requires 12V DC and does not exceed 45W. The 3.75A rated output current must cover the total draw of the panel or computer.

Can this power supply run multiple 12V sensors, fans, or small enclosure loads together?

Yes, if the combined 12V load remains at or below 3.75A and 45W. For grouped panel devices, the main sizing check is the total current on the 12V rail.

Would the EPS-45-12 work for IT, networking, or communications hardware that needs 12V DC?

It can work for 12V IT or communications hardware if the equipment is specified for constant-voltage 12V input and stays within 45W. Its 90-264VAC input supports operation across a broad AC input range.

Is the EPS-45-12 suitable for indoor equipment exposed to temperature swings?

The stated operating range is -30°C to +70°C, with output load derating at higher temperatures per the derating curve. No IP rating is listed in the provided specs, so those specs do not establish exposed outdoor or wet-environment use.

How does the EPS-45-12 compare with other 12V EPS models?

Among the 12V models on this spec sheet, EPS-45-12 and EPS-45-12-C share the same 45W, 3.75A rating. EPS-45-12 is the PCB version at 101.6 × 50.8 × 29 mm and 0.14 kg, while EPS-45-12-C is the cased version at 103.4 × 62 × 37 mm and 0.3 kg.

Payment & Security

Payment methods

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Please log in to write a review.

{ "id":8655421931840, "variants" :[{ "context":"default", "variant_id": 46624588595520, "sku":"EPS-45-12", "inventory_qty" : 160, "customer" :true, "custom_html" :"\u003cdiv class=\"price\"\u003e\n \u003cdiv class=\"price__default\"\u003e\n \u003cstrong class=\"price__current\"\u003e$16.88\u003c\/strong\u003e\n \u003cs class=\"price__was\"\u003e\u003c\/s\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"unit-price relative\" hidden\u003e\u003cspan class=\"visually-hidden\"\u003eUnit price\u003c\/span\u003e\u003cspan class=\"unit-price__price\"\u003e\u003c\/span\u003e\u003cspan class=\"unit-price__separator\"\u003e \/ \u003c\/span\u003e\u003cspan class=\"unit-price__unit\"\u003e\u003c\/span\u003e\u003c\/div\u003e\n\n \u003cdiv class=\"price__no-variant\" hidden\u003e\n \u003cstrong class=\"price__current\"\u003eUnavailable\u003c\/strong\u003e\n \u003c\/div\u003e\n\n \u003c\/div\u003e", "volume_html" :"\u003cvolume-pricing class=\"parent-display inside_product_form\" id=\"volume-pricing-main\" \u003e\u003c\/volume-pricing\u003e" } ] }

Mean Well EPS-45-12 Power Supply 45W 12V 3.75A

Overview

Features

Specifications

OUTPUT

INPUT

PROTECTION

ENVIRONMENT

SAFETY & EMC (Note 4)

OTHERS

MODEL ENCODING

Technical drawings

Downloads

Datasheet1

Certificates4

Test reports1

Catalogues1

FAQ

Payment & Security

Write a review

Your cart

Mean Well EPS-45-12 Power Supply 45W 12V 3.75A

Features

Company Information

Services and Support

Choose options