Mean Well IRM-30-12ST Switching Power Supply - Open Frame Type

Name: Mean Well IRM-30-12ST Switching Power Supply 3W 12V 2.5A - Encapsulated
Brand: Mean Well
SKU: IRM-30-12ST
Price: 18.09 USD
Availability: InStock

Overview

IRM-30-12ST is the 12V output model of this series: rated current 2.5A, rated power 30W, typical efficiency 88%. Type ST: Screw terminal style.

IRM-30 is a 30W miniature (69.5*39*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 85~305Vac. The 94V-0 flame retardant plastic case and potted with silicone enhance the heat dissipation. PCB mounting style model(Blank) meet the anti-vibration demand up to 2G and screw terminal style model (ST) meet the anti-vibration demand up to 5G; moreover, it provides the fundamental resistance to dust and moisture. With the high efficiency up to 90% and the extremely low no-load power consumption below 0.1W, IRM-30 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 superlative EMC features keep the end electronic units from electromagnetic interference. In addition to module-type model, IRM-30 series also offers the screw terminal style model (ST).

Features

2.74"x1.54"compact size
PCB, chassis or screw terminal mounting version
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(except for 5V)
3 years warranty

Specifications

IRM-30-12STSpecifications from the official datasheet (2026-04-03 edition)

OUTPUT

DC VOLTAGE: 12V
RATED CURRENT: 2.5A
CURRENT RANGE: 0 ~ 2.5A
RATED POWER: 30W
RIPPLE & NOISE (max.)^Note.2: 150mVp-p
VOLTAGE TOLERANCE^Note.3: ±2.5%
LINE REGULATION: ±0.5%
LOAD REGULATION: ±0.5%
SETUP, RISE TIME: 1000ms, 30ms/230Vac 1500ms, 30ms/115Vac at full load
HOLD UP TIME (Typ.): 40ms/230Vac 12ms/115Vac at full load

INPUT

VOLTAGE RANGE: 85 ~ 305Vac
FREQUENCY RANGE: 47 ~ 440Hz
EFFICIENCY (Typ.): 88%
AC CURRENT (Typ.): 0.75A/115Vac 0.5A/230Vac 0.375A/277Vac
INRUSH CURRENT (Typ.): COLD START 25A/115Vac 45A/230Vac
LEAKAGE CURRENT: < 0.25mA/277Vac

PROTECTION

OVERLOAD: 105% ~ 160% rated output power Protection type : Hiccup mode, recovers automatically after fault condition is removed
OVER VOLTAGE: 12.6 ~ 16.2V 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: Blank:10 ~ 500Hz, 2G 10min./1cycle, period for 60min. each along X, Y, Z axes ST:10 ~ 500Hz, 5G 10min./1cycle, period for 60min. each along X, Y, Z axes

SAFETY & EMC

SOLDERING TEMPERATURE: Wave soldering: 265℃,5s (max.); Manual soldering: 390℃,3s (max.)
OVER VOLTAGE CATEGORY: Ⅲ; According to EN62368-1;altitude up to 2000 meters
OPERATING ALTITUDE^Note.4: 2000 meters
SAFETY STANDARDS: IEC62368-1,IEC61558-1/-2-16, UL62368-1, TUV BS EN/EN62368-1, BS EN/EN60335-1, 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 Ⅲ, 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^Note.5: 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: 7713.0K hrs min. Telcordia SR-332 (Bellcore) ; 593.4K hrs min. MIL-HDBK-217F (25℃)
DIMENSION: PCB mounting style : 69.5*39*24mm (L*W*H) Screw terminal style : 91*39.5*28.5mm (L*W*H)
PACKING: PCB mounting style : 0.094Kg;144pcs/14.5Kg/0.94CUFT Screw terminal style :0.113Kg;120pcs/14.6Kg/0.83CUFT

MODEL ENCODING

Blank: PCB mounting style
ST (this model): Screw terminal style

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-30-12ST Derating Curve — Derating Curve

IRM-30-12ST Mechanical Specification — Mechanical Specification

Typical applications

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

Downloads

Datasheet1

IRM-30-12ST datasheetIRM-30-SPEC.PDF · 2026-04-03 edition PDF Download

Certificates4

EMC Certificate (IRM-30)(EN) PDF Download

UL Certificate (IRM-30)(EN) PDF Download

CB Certificate (IRM-30)(EN) PDF Download

TUV Certificate (IRM-30)(EN) PDF Download

Test reports1

Test Report(IRM-30-12)(EN) PDF Download

Catalogues1

Mean Well Catalog (Industrial) PDF Download

FAQ

Can I use the IRM-30-12ST to power a 12V industrial control board or embedded controller?

Yes, this model provides a constant 12V output with up to 2.5A and 30W. That makes it suitable for 12V industrial control boards, embedded controllers, and similar low-power automation electronics that stay within those output limits.

Is the IRM-30-12ST suitable for 12V sensors, relays, and small automation loads in one enclosure?

It can be a fit for grouped 12V sensors, relays, and other small automation loads as long as the combined load stays within 2.5A and 30W. The wide 85-305VAC input also helps when the same design may be used across different AC supply ranges.

Can this power supply run a 12V HMI or operator interface in a compact machine?

It can be used for a compact 12V HMI or operator interface if the device’s demand is within the 12V, 2.5A, and 30W rating. Its compact 91 × 39.5 × 28.5 mm screw terminal style package supports use where internal space is limited.

Is the IRM-30-12ST a good choice for 12V industrial electronics that need screw terminal style power?

Yes, this version is the screw terminal style variant and delivers 12V constant voltage at up to 2.5A. It is aimed at compact industrial or embedded equipment that needs 30W output and a wide 85-305VAC input range.

What is the difference between the IRM-30-12ST and the other IRM-30 output options?

Within the IRM-30 range, the comparable output options are IRM-30-5 and IRM-30-5ST at 30W, 5V, 6A; IRM-30-12 and IRM-30-12ST at 30W, 12V, 2.5A; IRM-30-15 and IRM-30-15ST at 30W, 15V, 2A; IRM-30-24 and IRM-30-24ST at 31.2W, 24V, 1.3A; and IRM-30-48 and IRM-30-48ST at 30.2W, 48V, 0.63A. The IRM-30-12ST matches the 12V, 2.5A, 30W rating of the IRM-30-12, while this ST version uses screw terminal style.

Can the IRM-30-12ST be used in outdoor or harsh-temperature equipment?

Its operating temperature range is -30°C to +85°C (with load derating at higher ambient temperatures per the derating curve), so it can suit equipment exposed to a wide internal temperature range. No IP rating is listed, so it should be used in a protected enclosure for indoor or shielded applications rather than exposed outdoor placement.

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Mean Well IRM-30-12ST Switching Power Supply 3W 12V 2.5A - Encapsulated

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Overview

Features

Specifications

OUTPUT

INPUT

PROTECTION

ENVIRONMENT

SAFETY & EMC

OTHERS

MODEL ENCODING

Technical drawings

Typical applications

Downloads

Datasheet1

Certificates4

Test reports1

Catalogues1

FAQ

Payment & Security

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Mean Well IRM-30-12ST Switching Power Supply 3W 12V 2.5A - Encapsulated

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