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Mean Well

Mean Well EPS-45-5 Power Supply 40W 5V 8A

5.0 (1 review)
4" x 2"high efficiencyoptional L-bracket and coverno load power consumption<0.3W
SKU EPS-45-5
$15.19 USD
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Overview

EPS-45-5 is the 5V output model of this series: rated current 8A, rated power 40W, typical efficiency 82%. 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-45-5Specifications from the official datasheet (2026-03-31 edition)

OUTPUT

DC VOLTAGE
5V
RATED CURRENT
8A
CURRENT RANGE
0 ~ 9A
RATED POWER
40W
PEAK LOAD(10sec.)Note.6
45W
RIPPLE & NOISE (max.)Note.2
80mVp-p
VOLTAGE ADJ. RANGE
4.75 ~ 5.5V
VOLTAGE TOLERANCENote.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 RANGENote.5
90 ~ 264VAC 127 ~ 370VDC [DC input operation possible by connecting AC/N(+), AC/L(-)]
FREQUENCY RANGE
47 ~ 63Hz
EFFICIENCY (Typ.)
82%
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
5.6 ~ 6.75V 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 ALTITUDENote.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. 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 0.1μF & 47μF parallel capacitor.
  3. 3. Tolerance : includes set up tolerance, line regulation and load regulation.
  4. 4. Derating may be needed under low input voltage. Please check the static characteristics for more details.
  5. 5. 33% Duty cycle maximum within every 30 seconds. Average output power should not exceed the rated power.
  6. 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. 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-45-5 Mechanical Specification
Mechanical Specification
EPS-45-5 Block Diagram
Block Diagram
EPS-45-5 Output Derating
Output Derating

Downloads

FAQ

Can I use the EPS-45-5 for a 5V embedded computer or controller?

Yes, if the device needs 5V constant voltage and the total load stays within 8A. This model provides up to 40W at 5V, which is useful for embedded controllers, logic boards, and computing assemblies that need higher current on a 5V rail.

Is the EPS-45-5 suitable for powering multiple 5V industrial logic or sensor boards?

It can be, as long as the combined 5V load does not exceed 8A or 40W. That makes it a practical option for grouped low-voltage logic, interface, and sensor electronics in industrial or automation equipment.

Would this work for a 5V test bench, programmer, or electronics fixture?

Yes, for bench and fixture applications that need a regulated 5V constant-voltage source with higher current capacity. The 8A output gives more headroom than lower-current 5V supplies for development and validation setups.

Can the EPS-45-5 power a 5V HMI, display, or control accessory?

Yes, if the accessory is built for 5V DC and stays within the 40W output limit. The 101.6 × 50.8 × 29.0 mm size and 0.14 kg weight also make it easier to use in compact equipment designs.

Is the EPS-45-5 meant for outdoor use or only protected environments?

The operating temperature range is -30°C to +70°C, with output load derating per the derating curve, so it is specified for a wide range of ambient temperatures. No IP rating is listed, so the published specs support protected indoor use rather than direct outdoor exposure.

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Customer reviews

5.0 Reviews verified for authenticity
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4 ★ (0)
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1 ★ (0)

Reviewed by 1 customer across the EPS series

  1. Replacement PS

    By Gary Z.|2026-07-09✓ Verified Buyer
    Model: EPS-15-15 ×1, EPS-15-5 ×1, EPS-15-7.5 ×1Quantity: 1

    Power Supplies were used to replace the one that was removed on a Phillips PM6680 counter, a +5V, +15V and -7V. They seem to work well so far. I have to put in a boost converter on the +15V for space and not use the +15V EPS.

Mean Well

Mean Well EPS-45-5 Power Supply 40W 5V 8A

$15.19 USD

EPS-45-5 is the 5V output model of this series: rated current 8A, rated power 40W, typical efficiency 82%. 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
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