Mean Well IRM-20-5 Switching Power Supply 3W 5V 4A

Name: Mean Well IRM-20-5 Switching Power Supply 3W 5V 4A - Encapsulated
Brand: Mean Well
SKU: IRM-20-5
Price: 10.77 USD
Availability: InStock

Overview

IRM-20-5 is the 5V output model of this series: rated current 4A, rated power 20W, typical efficiency 79%.

IRM-20 is a 20W miniature (52.4*27.2*24mm) AC-DC module-type power supply, ready to be soldered onto the PCB boards of various kinds of electronic instruments or industrial automation equipments. This product allows the universal input voltage range of 85~ 305 Vac. The 94V-0 flame retardant plastic case and potted with silicone enhance the heat dissipation and meet the anti-vibration demand up to 2G; moreover, it provides the fundamental resistance to dust and moisture. With the high efficiency up to 85% and the extremely low no-load power consumption below 0.1W, IRM-20 series fulfills the worldwide regulation for the low power consumption requirement for electronics. The entire series is a Class Ⅱ design (no FG pin), incorporating the built-in EMI filtering components, enabling the compliance with BS EN/EN55032 Class B; the supreme EMC features keep the end electronic units from electromagnetic interference.

Features

2.06''x1.07''compact size
Universal input 85~305Vac
No load power consumption<0.1W
EMI Class B without additional components
Wide operating temp. range -30~85℃
Protections: Short circuit / Overload / Over voltage
Cooling by free air convection
Isolation Class Ⅱ
Over voltage category Ⅲ (OVC Ⅲ)
Pass LPS
3 years warranty

Specifications

IRM-20-5Specifications from the official datasheet (2025-11-21 edition)

OUTPUT

DC VOLTAGE: 5V
RATED CURRENT: 4A
CURRENT RANGE: 0 ~ 4A
RATED POWER: 20W
RIPPLE & NOISE (max.)^Note.2: 200mVp-p
VOLTAGE TOLERANCE^Note.3: ±2.5%
LINE REGULATION: ±0.5%
LOAD REGULATION: ±1%
SETUP, RISE TIME: 1000ms, 20ms/230Vac 1000ms, 20ms/115Vac at full load
HOLD UP TIME (Typ.): 40ms/230Vac 8ms/115Vac at full load

INPUT

VOLTAGE RANGE: 85 ~ 305Vac 120 ~ 430Vdc
FREQUENCY RANGE: 47 ~ 440Hz
EFFICIENCY (Typ.): 79%
AC CURRENT (Typ.): 0.6A/115Vac 0.4A/230Vac 0.3A/277Vac
INRUSH CURRENT (Typ.): COLD START 20A/115Vac 40A/230Vac
LEAKAGE CURRENT: < 0.25mA/277Vac

PROTECTION

OVERLOAD: 115%~160% rated output power Protection type : Hiccup mode, recovers automatically after fault condition is removed
OVER VOLTAGE: 5.75 ~ 6.75V Protection type : Shut off o/p voltage, clamping by zener diode

ENVIRONMENT

WORKING TEMP.: -30 ~ +85℃ (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℃)
VIBRATION: 10 ~ 500Hz, 2G 10min./1cycle, period for 60min. each along X, Y, Z axes
SOLDERING TEMPERATURE: Wave soldering: 265℃,5s (max.); Manual soldering: 390℃,3s (max.)
OPERATING ALTITUDE^Note.4: 2000 meters

SAFETY & EMC

SAFETY STANDARDS: IEC62368-1,IEC61558-1/-2-16,UL62368-1,TUV BS EN/EN62368-1,BS EN/EN61558-1/-2-16,EAC TP TC 004, BSMI CNS15598-1 approved
OVER VOLTAGE CATEGORY: IEC/EN 61558-1/-2-16(OVC Ⅲ, altitude up to 2000m); IEC/EN/UL 62368-1(OVC Ⅱ, altitude up to 2000m)
WITHSTAND VOLTAGE: I/P-O/P:4.2KVac
ISOLATION RESISTANCE: I/P-O/P:100M Ohms / 500Vdc / 25℃/ 70% RH
EMC EMISSION: Parameter Standard Test Level

Conducted BS EN/EN55032(CISPR32), CNS15936 Class B
Radiated BS EN/EN55032(CISPR32), CNS15936 Class B
Harmonic Current (Note 5) BS EN/EN61000-3-2 Class A
Voltage Flicker BS EN/EN61000-3-3
EMC IMMUNITY: BS EN/EN55035, BS EN/EN61000-6-2

Parameter Standard Test Level

ESD BS EN/EN61000-4-2 Level 3, 8KV air; Level 2, 4KV contact, criteria A
Radiated Susceptibility BS EN/EN61000-4-3 Level 3, criteria A
EFT/Burest BS EN/EN61000-4-4 Level 3, criteria A
Surge BS EN/EN61000-4-5 Level 4,2KV/L-N, criteria A
Conducted BS EN/EN61000-4-6 Level 3, criteria A
Magnetic Field BS EN/EN61000-4-8 Level 4, criteria A
Voltage Dips and interruptions BS EN/EN61000-4-11 ＞95% dip 0. 5 periods, 30% dip 25 periods, ＞95% interruptions 250 periods

Parameter	Standard	Test Level
Conducted	BS EN/EN55032(CISPR32), CNS15936	Class B
Radiated	BS EN/EN55032(CISPR32), CNS15936	Class B
Harmonic Current (Note 5)	BS EN/EN61000-3-2	Class A
Voltage Flicker	BS EN/EN61000-3-3

Parameter	Standard	Test Level
ESD	BS EN/EN61000-4-2	Level 3, 8KV air; Level 2, 4KV contact, criteria A
Radiated Susceptibility	BS EN/EN61000-4-3	Level 3, criteria A
EFT/Burest	BS EN/EN61000-4-4	Level 3, criteria A
Surge	BS EN/EN61000-4-5	Level 4,2KV/L-N, criteria A
Conducted	BS EN/EN61000-4-6	Level 3, criteria A
Magnetic Field	BS EN/EN61000-4-8	Level 4, criteria A
Voltage Dips and interruptions	BS EN/EN61000-4-11	＞95% dip 0. 5 periods, 30% dip 25 periods, ＞95% interruptions 250 periods

OTHERS

MTBF: 10656.2K hrs min. Telcordia SR-332 (Bellcore) ; 970.3K hrs min. MIL-HDBK-217F (25℃)
DIMENSION: 52.4*27.2*24mm (L*W*H)
PACKING: 0.05Kg/240pcs/13Kg/0.94CUFT

Test conditions and notes5

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. 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).
5. The power supply is considered as an independent unit ,but the final equipment still need to re-confirm that the whole system complies with the 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

IRM-20-5 Derating Curve — Derating Curve

Typical applications

Industrial electrical equipment
Mechanical equipment
Factory automation equipment
Hand-held electronic device

Downloads

Datasheet1

IRM-20-5 datasheetIRM-20-SPEC.PDF · 2025-11-21 edition PDF Download

Certificates4

EMC Certificate (IRM-20)(EN) PDF Download

UL Certificate (IRM-20)(EN) PDF Download

CB Certificate (IRM-20)(EN) PDF Download

TUV Certificate (IRM-20)(EN) PDF Download

Test reports1

Test Report(IRM-20-5)(EN) PDF Download

Catalogues1

Mean Well Catalog (Industrial) PDF Download

FAQ

Can I use the IRM-20-5 to power a 5V single-board computer or embedded controller?

Yes, this model provides constant-voltage 5V output up to 4A, with 20W total power. That makes it suitable for 5V embedded controllers, SBCs, and supporting logic hardware that stay within that load range. It accepts 85-305VAC input for direct AC-powered equipment designs.

Is the IRM-20-5 appropriate for USB-level 5V logic and peripheral power inside industrial equipment?

It can be appropriate for internal 5V logic and peripheral rails if the combined load does not exceed 4A. The fixed 5V output suits many digital boards, interface modules, and low-voltage automation electronics. The encapsulated PCB-mount construction is intended for integration on the board side of equipment.

Can this model run a 5V HMI controller, touchscreen logic board, or industrial display electronics?

Yes, for 5V display and control electronics that operate within 20W and 4A. That includes low-voltage HMI controller boards or display logic sections that need a regulated 5V rail. The miniature 52.4 x 27.2 x 24.0 mm package helps in compact equipment layouts.

Would the IRM-20-5 fit a compact automation gateway or edge device?

It can fit a compact automation gateway or edge device when the device runs on 5V DC and remains under 4A. The unit weighs 0.05 kg and uses an encapsulated miniature form factor, which supports small internal assemblies. This is a constant-voltage supply, so it is intended for fixed 5V loads rather than variable-output requirements.

Can the IRM-20-5 be used in outdoor or washdown environments?

The operating temperature range is -30C to +85C, with output derating at higher temperatures per the derating curve, so the temperature spec is broad for internal equipment use. The provided specifications do not include an IP rating, which means outdoor or washdown suitability should not be assumed. It is best used inside a protected enclosure.

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Mean Well IRM-20-5 Switching Power Supply 3W 5V 4A - Encapsulated

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