Mean Well IRM-90-24ST 99W 24V 4.13A Switching Power Supply - Encapsulated

Name: Mean Well IRM-90-24ST Switching Power Supply 99W 24V 4.13A - Encapsulated
Brand: Mean Well
SKU: IRM-90-24ST
Price: 31.01 USD
Availability: InStock

Overview

IRM-90-24ST is the 24V output model of this series: typical efficiency 93%. Type ST: Screw terminal style.

IRM-90 is a 90W miniature (87*52*29.5mm) AC-DC PCB-mount 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 80~305Vac. The 94V-0 flame retardant plastic case and potted with silicone enhance the heat dissipation and meet the anti-vibration demand up to 2~5G anti-vibration by model; moreover, it provides the fundamental resistance to dust and moisture. With the high efficiency up to 93% and the extremely low no-load power consumption below 0.3W, IRM-90 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 super EMC features keep the end electronic units from from electromagnetic interference. In addition to the PCB mounting style model, IRM-90 series also offers the screw terminal style model (ST).

Features

3.43"x2.05" compact size
PCB, chassis or screw terminal mounting version
Universal input 80~305Vac
No load power consumption<0.3W
EMI BS EN/EN55032 ClassB without additional components
Wide operating temp. rage -40~+85℃
Protections: Short circuit / Overload / Over voltage
Cooling by free air convection
Isolation Class Ⅱ
Over voltage category Ⅲ
Operating altitude up to 4000 meters (Note.7)
100W peak(10 sec.)
3 years warranty

Specifications

IRM-90-24STSpecifications from the official datasheet (2026-06-16 edition)

OUTPUT

DC VOLTAGE: 24V
CURRENT Peak(10 sec.): 4.13A
CURRENT Convection: 3.75A
RATED POWER Peak(10 sec.)^Note.2: 99W
RATED POWER Convection: 90W
RIPPLE & NOISE (max.)^Note.3: 200mVp-p
VOLTAGE TOLERANCE^Note.4: ±2.0%
LINE REGULATION: ±0.5%
LOAD REGULATION: ±0.5%
SETUP, RISE TIME: 1000ms, 30ms/230Vac 1000ms, 30ms/115Vac at full load
HOLD UP TIME (Typ.): 30ms/230Vac 10ms/115Vac at full load

INPUT

VOLTAGE RANGE^Note.5: 80 ~ 305Vac 113 ~ 431Vdc
FREQUENCY RANGE: 47 ~ 63Hz
EFFICIENCY (Typ.): 93%
AC CURRENT (Typ.): 1.9A/115Vac 1.1A/230Vac
INRUSH CURRENT (Typ.): COLD START 30A/115Vac 65A/230Vac
LEAKAGE CURRENT (max.)^Note.6: < 0.25mA/240Vac

PROTECTION

OVERLOAD: 115% ~ 160% rated output power Protection type : Hiccup mode, recovers automatically after fault condition is removed
OVER VOLTAGE: 25.2 ~ 32.4V Protection type : Shut down o/p voltage, re-power on to recover
OVER TEMPERATURE: Protection type : Shut down o/p voltage, re-power on to recover

ENVIRONMENT

WORKING TEMP.: -40 ~ +85℃ (Refer to "Derating Curve")
WORKING HUMIDITY: 20 ~ 90% RH non-condensing
STORAGE TEMP.: -40 ~ +85℃
TEMP. COEFFICIENT: ±0.03%/℃ (0 ~ 50℃)
SOLDERING TEMPERATURE: Wave soldering: 265℃,5s (max.); Manual soldering: 390℃,3s (max.)
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
OPERATING ALTITUDE^Note.7: Ⅲ; EN62368-1;altitude up to 2000 meters

SAFETY & EMC

SAFETY STANDARDS: IEC62368-1, IEC60335-1, Dekra BS EN/EN60335-1,BS EN/EN62368-1,UL62368-1, TUV BS EN/EN62368-1, EAC TP TC 004 approved
WITHSTAND VOLTAGE: I/P-O/P:4KVac
ISOLATION RESISTANCE: I/P-O/P:100M Ohms / 500Vdc / 25℃/ 70% RH
EMC EMISSION: Parameter Standard Test Level

Conducted BS EN/EN55032 (CISPR32),BS EN/EN55014-1 Class B
Radiated BS EN/EN55032 (CISPR32),BS EN/EN55014-1 Class B
Harmonic Current BS EN/EN61000-3-2 Class A
Voltage Flicker BS EN/EN61000-3-3
EMC IMMUNITY: BS EN/EN55035, BS EN/EN61000-6-2,BS EN/EN55014-2

Parameter Standard Test Level

ESD BS EN/EN61000-4-2 Level 3, 8KV air; Level 2, 4KV contact, criteria A
RF field susceptibility BS EN/EN61000-4-3 Level 3, criteria A
EFT bursts BS EN/EN61000-4-4 Level 3, criteria A
Surge susceptibility BS EN/EN61000-4-5 Level 4,2KV/L-N, criteria A
Conducted susceptibility BS EN/EN61000-4-6 Level 3, criteria A
Magnetic field immunity BS EN/EN61000-4-8 Level 4, criteria A
Voltage dip, interruption 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),BS EN/EN55014-1	Class B
Radiated	BS EN/EN55032 (CISPR32),BS EN/EN55014-1	Class B
Harmonic Current	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
RF field susceptibility	BS EN/EN61000-4-3	Level 3, criteria A
EFT bursts	BS EN/EN61000-4-4	Level 3, criteria A
Surge susceptibility	BS EN/EN61000-4-5	Level 4,2KV/L-N, criteria A
Conducted susceptibility	BS EN/EN61000-4-6	Level 3, criteria A
Magnetic field immunity	BS EN/EN61000-4-8	Level 4, criteria A
Voltage dip, interruption	BS EN/EN61000-4-11	＞95% dip 0. 5 periods, 30% dip 25 periods, ＞95% interruptions 250 periods

OTHERS

MTBF: 5088.4K hrs min. Telcordia SR-332 (Bellcore) ; 609.9K hrs min. MIL-HDBK-217F (25℃)
DIMENSION: PCB mounting style : 87*52*29.5mm (L*W*H) Screw terminal style : 109*52*33.5mm (L*W*H)
PACKING: PCB mounting style : 0.197Kg;60pcs/11.8Kg/0.94CUFT Screw terminal style :0.219Kg;50pcs/12Kg/0.56CUFT

MODEL ENCODING

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

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. Leakage 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. 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

IRM-90-24ST Block Diagram — Block Diagram

IRM-90-24ST Derating Curve — Derating Curve

IRM-90-24ST Mechanical Specification — Mechanical Specification

Typical applications

Industrial electrical equipment
Mechanical equipment
Factory automation equipment
Handheld electronic device

Downloads

Datasheet1

IRM-90-24ST datasheetIRM-90-spec.pdf · 2026-06-16 edition PDF Download

Certificates9

Mean Well IRM-90-Dekra seal.PDF Certificate PDF Download

Mean Well IRM-90(ST)-DEKRA-Mark Certificate PDF Download

Mean Well IRM-90(ST)-CB Certificate PDF Download

Mean Well IRM-90(ST)-CB(UL) Certificate PDF Download

Mean Well IRM-90-EMC Certificate PDF Download

Mean Well IRM-90-UK-dec Certificate PDF Download

Mean Well IRM-90-CE-dec Certificate PDF Download

Mean Well 0147476-EAC Certificate PDF Download

Mean Well E183223 UL Certificate PDF Download

Test reports1

Mean Well PHP-3500-24 Test Report PDF Download

Catalogues1

Mean Well Catalog (Industrial) PDF Download

FAQ

Can I use the IRM-90-24ST for a 24V industrial automation panel or control module?

Yes, this model delivers constant voltage 24V output rated at 90W and 3.75A. That output is appropriate for 24V automation panels, industrial controls, and machine subsystems that need a higher-power encapsulated supply.

Is the IRM-90-24ST suitable for 24V DIN-style control loads inside equipment, even if it is not a DIN rail supply itself?

It can supply 24V control loads that fit within 90W and 3.75A, provided the equipment uses an internal encapsulated AC-DC module. The input range is 80-305VAC, and the package size is 109.0 x 52.0 x 33.5 mm.

Can this power supply support 24V industrial sensors, I/O, or monitoring hardware from one source?

Yes, when the combined 24V load remains within 3.75A and 90W. Its constant voltage operation makes it suitable for grouped 24V industrial electronics that need one centralized internal supply.

Is the IRM-90-24ST appropriate for equipment that needs screw terminal style instead of PCB mounting?

Yes, screw terminal style is one of the defining features of this version. Electrically it provides the same 24V, 90W, and 3.75A rating as IRM-90-24, but in the larger 109.0 x 52.0 x 33.5 mm ST format.

What are the main IRM-90 output choices in this series?

The IRM-90 series includes 12V at 80.4W and 6.7A, 15V at 85.05W and 5.67A, 24V at 90W and 3.75A, and 48V at 90.2W and 1.88A. For 24V specifically, IRM-90-24 and IRM-90-24ST share the same electrical rating, with PCB mounting on the non-ST version and screw terminal style on the ST version.

Can the IRM-90-24ST handle cold or hot operating conditions, and is it rated for outdoor use?

The stated operating temperature range is -40C to +85C, with output derating at higher temperatures per the derating curve, so it is specified for wide temperature conditions. No IP rating is provided, so these specs do not confirm outdoor or wet-location suitability.

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Mean Well IRM-90-24ST Switching Power Supply 99W 24V 4.13A - Encapsulated

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Overview

Features

Specifications

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INPUT

PROTECTION

ENVIRONMENT

SAFETY & EMC

OTHERS

MODEL ENCODING

Technical drawings

Typical applications

Downloads

Datasheet1

Certificates9

Test reports1

Catalogues1

FAQ

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Mean Well IRM-90-24ST Switching Power Supply 99W 24V 4.13A - Encapsulated

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