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Mean Well EPS-45-3.3 Power Supply 26W 3.3V 8A

Name: Mean Well EPS-45-3.3 Power Supply 26W 3.3V 8A
Brand: Mean Well
SKU: EPS-45-3.3
Price: 16.88 USD
Availability: InStock

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

SKU EPS-45-3.3

$16.88 USD

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In stock

Overview

EPS-45-3.3 is the 3.3V output model of this series: rated current 8A, rated power 26.4W, typical efficiency 80%. 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-45-3.3Specifications from the official datasheet (2026-03-31 edition)

OUTPUT

DC VOLTAGE: 3.3V
RATED CURRENT: 8A
CURRENT RANGE: 0 ~ 9A
RATED POWER: 26.4W
PEAK LOAD(10sec.)^Note.6: 29.7W
RIPPLE & NOISE (max.)^Note.2: 80mVp-p
VOLTAGE ADJ. RANGE: 3.1 ~ 3.6V
VOLTAGE TOLERANCE^Note.3: ±3.0%
LINE REGULATION: ±0.5%
LOAD REGULATION: ±2.0%
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.): 80%
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: 3.7 ~ 4.45V 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-45-3.3 Mechanical Specification — Mechanical Specification

EPS-45-3.3 Block Diagram — Block Diagram

EPS-45-3.3 Output Derating — Output Derating

Downloads

Datasheet1

EPS-45-3.3 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-45-3.3)(EN) PDF Download

Catalogues1

Mean Well Catalog (Industrial) PDF Download

FAQ

Can I use the EPS-45-3.3 to power 3.3V logic boards or embedded controllers?

Yes, this model is designed for constant voltage 3.3V output and can deliver up to 8A, with a total power rating of 26.4W. That makes it relevant for embedded and digital electronics that require a regulated 3.3VDC source from a 90-264VAC input.

Is the EPS-45-3.3 suitable for FPGA, MCU, or industrial communication boards that run on 3.3V?

It can be used for 3.3V industrial and embedded boards when their combined demand stays within 26.4W and 8A. The key fit point is that the load must be specified for constant voltage 3.3V operation.

Can this power supply support multiple 3.3V control modules in one system?

It can, provided the total current draw of all 3.3V modules does not exceed 8A and the total output power does not exceed 26.4W. For AC-fed cabinets or equipment, the 90-264VAC input range gives flexibility on the supply side.

Is the EPS-45-3.3 meant for indoor electronics rather than outdoor exposed use?

The published operating temperature range is -30°C to +70°C, with output load derating per the derating curve, which supports a wide range of equipment-room and enclosure conditions. No IP rating is listed, so it should not be treated as an outdoor-exposed or sealed-enclosure power supply by itself.

How does the EPS-45-3.3 compare with other 3.3V EPS models?

Among the 3.3V models on this spec sheet, EPS-45-3.3 and EPS-45-3.3-C share the same 26.4W, 8A rating. EPS-45-3.3 is the PCB version at 101.6 × 50.8 × 29 mm and 0.14 kg, while EPS-45-3.3-C is the cased version at 103.4 × 62 × 37 mm and 0.3 kg.

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Mean Well EPS-45-3.3 Power Supply 26W 3.3V 8A

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

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Mean Well EPS-45-3.3 Power Supply 26W 3.3V 8A

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