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

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

Name: Mean Well EPS-45S-5 Power Supply 40W 5V 8A
Brand: Mean Well
SKU: EPS-45S-5
Price: 15.69 USD
Availability: InStock
Rating: 5.0 (1 reviews)

5.0 (1 review)

3" x 2"economical non-PFCsmall sizehigh efficiency

SKU EPS-45S-5

$15.69 USD

Shipping calculated at checkout.

Notify me when it's back in stock

Your order will be processed within 24 hours

Overview

EPS-45S-5 is the 5V output model of this series: rated current 8A, rated power 40W, typical efficiency 83%.

EPS-45S is a 45W highly reliable green PCB type industrial power supply with a high power density on the 3” by 2” footprint. It accepts 80~264VAC input and offers various output voltages between 3.3V and 48V. The working efficiency is up to 91% and the extremely low no load power consumption is down below 0.1W. EPS-45S is able to be used for ClassⅡ(no FG) system design.

Features

3"×2" miniature size
Universal AC input / Full range
ClassⅡ(without FG) installations
No load power consumption<0.1W
High efficiency up to 91%
For 1U applications
Protections: Short circuit / Overload / Over voltage
Cooling by free air convection
-30~70℃wide range of operating temperature
Operating altitude up to 5000 meters
LED indicator for power on
3 years warranty

Specifications

EPS-45S-5Specifications from the official datasheet (2026-03-31 edition)

OUTPUT

DC VOLTAGE: 5V
RATED CURRENT: 8A
CURRENT RANGE: 0 ~ 8.8A
RATED POWER: 40W
PEAK LOAD(10sec.)^Note.2: 44W
RIPPLE & NOISE (max.)^Note.3: 80mVp-p
VOLTAGE ADJ.RANGE: 4.7~5.5V
VOLTAGE TOLERANCE^Note.4: ±2.0%
LINE REGULATION: ±0.5%
LOAD REGULATION: ±2.0%
SETUP, RISE TIME: 500ms, 30ms / 230VAC 500ms, 30ms / 115VAC at full load
HOLD UP TIME (Typ.): 30ms / 230VAC 12ms / 115VAC at full load

INPUT

VOLTAGE RANGE^Note.5: 80 ~ 264VAC
FREQUENCY RANGE: 47 ~ 63Hz
EFFICIENCY (Typ.): 83%
AC CURRENT (Typ.): 1.2A / 115VAC 1A / 230VAC
INRUSH CURRENT (Typ.): COLD STAR 30A/115VAC 60A/230VAC
LEAKAGE CURRENT(max.): 0.25mA/264VAC

PROTECTION

OVERLOAD: 115 ~ 150% rated output power Protection type : Hiccup mode, recovers automatically after fault condition is removed
OVER VOLTAGE: 5.7~6.8V Protection type : Shut down o/p voltage, re-power on to recover

ENVIRONMENT

WORKING TEMP.: -30 ~ +70℃ (Refer to "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: 5000 meters
VIBRATION: 10 ~ 500Hz, 2G 10min./1cycle, period for 60min. each along X, Y, Z axes

SAFETY & EMC (Note. 8)

SAFETY STANDARDS: UL62368-1, TUV BS EN/EN62368-1, BS EN/EN60335-1, CCC GB4943.1, EAC TP TC 004 approved
WITHSTAND VOLTAGE: I/P-O/P: 3KVAC
ISOLATION RESISTANCE: I/P-O/P: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: 3334.3K hrs min. Telcordia SR-332 (Bellcore) ; 706.6K hrs min. MIL-HDBK-217F (25℃)
DIMENSION: 76.2*50.8*24mm or 3" * 2" *0.945" inch (L*W*H)
PACKING: 0.11Kg; 120pcs/14.2Kg/0.94CUFT

Test conditions and notes8

1. All parameters NOT specially mentioned are measured at 230VAC input, rated load and 25℃ of ambient temperature.
2. 33% Duty cycle maximum within every 30 seconds. Average output power should not exceed the rated power.
3. Ripple & noise are measured at 20MHz of bandwidth by using a 12" twisted pair-wire terminated with a 0.1μF & 47μF parallel capacitor.
4. Tolerance : includes set up tolerance, line regulation and load regulation.
5. Derating may be needed under low input voltages. Please check the derating curve for more details.
6. Touch current was measured from primary input to DC output.
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).
8. 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 )

Technical drawings

EPS-45S-5 Derating Curve — Derating Curve

EPS-45S-5 Mechanical Specification — Mechanical Specification

Typical applications

Industrial electrical equipment
Mechanical equipment
Factory automation equipment
Handheld electronic device

Downloads

Datasheet1

EPS-45S-5 datasheetEPS-45S-SPEC.PDF · 2026-03-31 edition PDF Download

Certificates9

Mean Well E183223 UL Certificate PDF Download

Mean Well EPS-65S-45S TUV Certificate PDF Download

Mean Well EPS-45S-65S TUV Certificate PDF Download

Mean Well EPS-45S-65S CB Certificate PDF Download

Mean Well EPS-45S-65S CB(UL) Certificate PDF Download

Mean Well EPS-45S-65S CB(TUV) Certificate PDF Download

Mean Well EPS-45S-EMC Certificate PDF Download

Mean Well EPS-45S-65S CE-dec Certificate PDF Download

Mean Well EPS-45S-65S UK-dec Certificate PDF Download

Test reports1

Mean Well EPS-45S-5 Test Report PDF Download

Catalogues1

Mean Well Catalog (Industrial) PDF Download

FAQ

Can I use the EPS-45S-5 for a 5V industrial controller or embedded processor?

Yes, if the controller requires constant 5V DC and the total load stays within 8A and 40W. That makes it suitable for many 5V embedded processors, logic boards, and industrial control electronics.

Is the EPS-45S-5 a good choice for powering 5V HMI or operator interface electronics?

It can be, as long as the HMI electronics are designed for 5V constant voltage input and do not exceed 40W. With up to 8A rated current available, it suits 5V electronics with fairly high current draw.

Would this 5V supply work for industrial USB-style electronics or gateway hardware inside a control enclosure?

Yes, when the hardware runs from a regulated 5V DC source and stays within 8A. Its 76.2 x 50.8 x 24.0 mm size also makes it practical for compact enclosure-mounted electronics.

Can the EPS-45S-5 power 5V testing, monitoring, or automation support circuits?

It is a fit for 5V constant voltage support circuits that need up to 40W of available output. That includes many monitoring, test, and automation electronics used as internal low-voltage subsystems.

Is the EPS-45S-5 suitable for outdoor applications or exposed equipment cabinets?

No IP rating is listed in the provided specs, so this model is better suited to protected indoor enclosures than directly exposed locations. Its operating temperature range is -30°C to +70°C, but that does not replace a stated IP rating.

How does the EPS-45S-5 compare with the other EPS-45S models?

The EPS-45S range includes EPS-45S-3.3 at 26.4W, 3.3V, 8A; EPS-45S-5 at 40W, 5V, 8A; EPS-45S-7.5 at 40.5W, 7.5V, 5.4A; EPS-45S-12 at 45.6W, 12V, 3.8A; EPS-45S-15 at 45W, 15V, 3A; EPS-45S-24 at 45.6W, 24V, 1.9A; and EPS-45S-48 at 45.1W, 48V, 0.94A. This version keeps the same 8A current rating as the EPS-45S-3.3, but at a higher 5V output and 40W power level.

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.

Model	Power	Voltage	Current	IP Rating	Price
Mean Well EPS-45S-7.5 Power Supply 40W 7.5V 5.4A	40.5W	7.5V	5.4A	IP20	$15.69	View
Mean Well EPS-45S-48 Power Supply 45W 48V 940mA	45.1W	48V	0.94A	IP20	$15.69	View
Mean Well EPS-45S-3.3 Power Supply 26W 3.3V 8A	26.4W	3.3V	8A	IP20	$15.69	View
Mean Well EPS-45S-24 Power Supply 45W 24V 1.9A	45.6W	24V	1.9A	IP20	$15.69	View
Mean Well EPS-45S-15 Power Supply 45W 15V 3A	45W	15V	3A	IP20	$15.69	View
Mean Well EPS-45S-12 Power Supply 45W 12V 3.8A	45.6W	12V	3.8A	IP20	$15.69	View

Customer reviews

5.0 Reviews verified for authenticity

5 ★ (1)

4 ★ (0)

3 ★ (0)

2 ★ (0)

1 ★ (0)

Reviewed by 1 customer across the EPS series

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.

Please log in to write a review.