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Mean Well IRM-90-48ST Switching Power Supply 99.2W 48V 2.07A - Encapsulated

Name: Mean Well IRM-90-48ST Switching Power Supply 99.2W 48V 2.07A - Encapsulated
Brand: Mean Well
SKU: IRM-90-48ST
Price: 31.15 USD
Availability: InStock

miniature encapsulated typescrew terminal style

SKU IRM-90-48ST

$31.15 USD

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In stock

Overview

IRM-90-48ST is the 48V 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

Model encoding

Type	Function
Blank	PCB mounting style
ST (this model)	Screw terminal style

Specifications

IRM-90-48STSpecifications from the official datasheet (2026-06-16 edition)

OUTPUT

DC VOLTAGE: 48V
CURRENT Peak(10 sec.): 2.07A
CURRENT Convection: 1.88A
RATED POWER Peak(10 sec.)^Note.2: 99.2W
RATED POWER Convection: 90.2W
RIPPLE & NOISE (max.)^Note.3: 240mVp-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: 50.4 ~ 64.8V 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

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-90-48ST Block Diagram — Block Diagram

IRM-90-48ST Derating Curve — Derating Curve

IRM-90-48ST Mechanical Specification — Mechanical Specification

Typical applications

Industrial electrical equipment
Mechanical equipment
Factory automation equipment
Handheld electronic device

Downloads

Datasheet1

IRM-90-48ST 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-90-48ST for a 48V industrial control cabinet or panel supply?

Yes, it is a constant-voltage 48V power supply rated for up to 1.88A and 90.2W, which fits many industrial control and panel-level 48V loads. The screw terminal style makes it a practical choice where a compact encapsulated supply is needed in control equipment powered from 80-305VAC.

Is the IRM-90-48ST a good fit for 48V building automation or machine-control subsystems?

It can be used for 48V automation and machine-control subsystems when the connected load requires constant 48V DC and stays within 1.88A. The wide 80-305VAC input range also makes it usable across installations with different AC input conditions.

Can this model power a 48V communications, alarm, or supervisory device inside equipment?

Yes, it can support 48V communications, alarm, or supervisory devices in enclosed equipment as long as total demand does not exceed 90.2W. This model is best matched to applications that need a fixed 48V output rather than an adjustable or constant-current source.

Would the IRM-90-48ST work for a serviceable OEM product that uses 48V DC internally?

It is suitable for OEM products that need internal 48V DC power up to 1.88A and benefit from an encapsulated construction. Compared with the PCB mounting version, this ST version uses a screw terminal style and has a larger 109.0 × 52.0 × 33.5 mm footprint at 0.219 kg.

What is the difference between the IRM-90-48ST and IRM-90-48?

Both models have the same electrical rating: 90.2W, 48V, 1.88A, constant-voltage operation, 80-305VAC input, and -40°C to +85°C operating temperature (with derating per the derating curve). The difference is the mechanical format: IRM-90-48 is PCB mounting style at 87.0 × 52.0 × 29.5 mm and 0.197 kg, while IRM-90-48ST is screw terminal style at 109.0 × 52.0 × 33.5 mm and 0.219 kg.

Can the IRM-90-48ST be used in outdoor or temperature-variable locations?

Its rated operating range is -40°C to +85°C, with output derating at higher temperatures per the derating curve, so the temperature specification covers both cold and hot equipment environments. No IP rating is provided in the listed specs, so it should be used in protected indoor housings or sheltered enclosures instead of exposed outdoor conditions.

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Model	Power	Voltage	Current
Mean Well IRM-90-48 Switching Power Supply 99.2W 48V 2.07A - Encapsulated	90.2W	48V	1.88A	View
Mean Well IRM-90-24ST Switching Power Supply 99W 24V 4.13A - Encapsulated	90W	24V	3.75A	View
Mean Well IRM-90-24 Switching Power Supply 99W 24V 4.13A - Encapsulated	90W	24V	3.75A	View
Mean Well IRM-90-15ST Switching Power Supply 93.5W 15V 6.23A - Encapsulated	85.05W	15V	5.67A	View
Mean Well IRM-90-15 Switching Power Supply 93.5W 15V 6.23A - Encapsulated	85.05W	15V	5.67A	View
Mean Well IRM-90-12ST Switching Power Supply 88.4W 12V 7.37A - Encapsulated	80.4W	12V	6.7A	View
Mean Well IRM-90-12 Switching Power Supply 88.4W 12V 7.37A - Encapsulated	80.4W	12V	6.7A	View

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