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Mean Well

Mean Well IRM-02-3.3S Switching Power Supply 2W 3.3V 600mA - Encapsulated

miniature encapsulated typeSMD style
SKU IRM-02-3.3S
$7.47 USD
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IRM-02-3.3S
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Overview

IRM-02-3.3S is the 3.3V output model of this series: rated current 600mA, rated power 2W, typical efficiency 66%. Type S: SMD style.

IRM-02 is a 2W miniature (33.7*22.2*15mm) 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 a universal input voltage range of 85~305Vac. The phenolic case and potted with silicone enhance the heat dissipation and meet the anti-vibration demand up to 5G; moreover, it provides the fundamental resistance to dust and moisture. With the high efficiency up to 77% and the extremely low no-load power consumption below 0.075W, IRM-02 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. In addition to module-type model, IRM-02 series also offers the SMD style model.

Features

  • Universal AC input / Full range
  • No load power consumption<0.075W
  • Compact size
  • Comply with BS EN/EN55032 Class B without any additional components
  • Wide operating temp. range -30~85℃
  • Protections: Short circuit / Overload / Over voltage
  • Cooling by free air convection
  • Isolation ClassⅡ
  • High reliability, low cost
  • 3 years warranty

Specifications

IRM-02-3.3SSpecifications from the official datasheet (2025-11-21 edition)

OUTPUT

DC VOLTAGE
3.3V
RATED CURRENT
600mA
CURRENT RANGE
0 ~ 600mA
RATED POWER
2W
RIPPLE & NOISE (max.)Note.2
150mVp-p
VOLTAGE TOLERANCENote.3
±2.5%
LINE REGULATION
±0.5%
LOAD REGULATION
±0.5%
SETUP, RISE TIME
600ms, 30ms/230Vac 600ms, 30ms/115Vac at full load
HOLD UP TIME (Typ.)
40ms/230Vac 12ms/115Vac at full load

INPUT

VOLTAGE RANGE
85 ~ 305Vac 120 ~ 430Vdc
FREQUENCY RANGE
47 ~ 63Hz
EFFICIENCY (Typ.)
66%
AC CURRENT (Typ.)
45mA/115Vac 30mA/230Vac 25mA/277Vac
INRUSH CURRENT (Typ.)
5A/115Vac 10A/230Vac
LEAKAGE CURRENT
< 0.25mA/277Vac

PROTECTION

OVERLOAD
≥110% rated output power Protection type : Hiccup mode, recovers automatically after fault condition is removed
OVER VOLTAGE
3.8 ~ 4.9V 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 ~ +100℃, 10 ~ 95% RH
TEMP. COEFFICIENT
±0.03%/℃ (0 ~ 75℃)
VIBRATION
10 ~ 500Hz, 5G 10min./1cycle, period for 60min. each along X, Y, Z axes
SOLDERING TEMPERATURE
Wave soldering: 265℃,5s (max.); Manual soldering: 390℃,3s (max.); Reflow soldering(SMD style): 240℃,10s (max.)

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 Ⅱ, 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
Compliance to BS EN/EN55032 (CISPR32) Class B, BS EN/EN61000-3-2,-3, EAC TP TC 020, CNS15936 Class B
EMC IMMUNITY
Compliance to BS EN/EN61000-4-2,3,4,5,6,8,11, BS EN/EN55035, heavy industry level (surge L-N : 1KV), EAC TP TC 020

OTHERS

MTBF
13571.4K hrs min. Telcordia SR-332 (Bellcore) ; 1960.2K hrs min. MIL-HDBK-217F (25℃)
DIMENSION
PCB mounting style : 33.7*22.2*15mm (L*W*H) SMD style : 33.7*22.2*16mm (L*W*H)
PACKING
PCB mounting style : 0.024Kg; 640pcs/ 16.3 Kg/ 0.84CUFT SMD style : 0.024Kg; 640 pcs/ 16.3 Kg/ 0.84CUFT

Certifications & ratings

Marked features
LPS

MODEL ENCODING

Blank
PCB mounting style
S (this model)
SMD style
Test conditions and notes4
  1. 1. All parameters NOT specially mentioned are measured at 230Vac input, rated load and 25℃ of ambient temperature.
  2. 2. Ripple & noise are measured at 20MHz of bandwidth by using a 12" twisted pair-wire terminated with a 0.1uf & 47uf parallel capacitor.
  3. 3. Tolerance : includes set up tolerance, line regulation and load regulation.
  4. 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).

Technical drawings

IRM-02-3.3S Block Diagram
Block Diagram
IRM-02-3.3S Mechanical Specification
Mechanical Specification
IRM-02-3.3S Recommended PCB Layout (for SMD
Recommended PCB Layout (for SMD

Typical applications

  • Industrial electrical equipment
  • Mechanical equipment
  • Factory automation equipment
  • Handheld electronic device

Downloads

FAQ

Can I use the IRM-02-3.3S on an SMD-based control board that needs 3.3V DC?

Yes, this version provides 3.3V constant-voltage output with a 2W rating and is built in an SMD style. That makes it relevant for compact surface-mount control, logic, and embedded boards powered from 85-305VAC input.

Is this model suitable for powering 3.3V automation electronics inside a panel or instrument?

It can be suitable for low-power 3.3V electronics used in automation panels, instruments, or monitoring products as long as the load remains within 2W. Its small 33.7 × 22.2 × 16.0 mm size supports dense internal layouts.

Can the IRM-02-3.3S be used for a small embedded processor board running at 3.3V?

Yes, for embedded processor or logic boards that need a regulated 3.3V constant-voltage supply and do not exceed the 2W output rating. It is aimed at low-power board-level use rather than larger 3.3V loads.

Would this be appropriate for low-power 3.3V sensing or telemetry hardware powered directly from AC input?

It can be appropriate where the sensing or telemetry hardware is a low-power 3.3V load and the design benefits from 85-305VAC input capability. The SMD encapsulated construction is suited to internal electronics assemblies, not external exposed hardware.

Can I use the IRM-02-3.3S outdoors if temperatures vary widely?

The temperature range is -30°C to +85°C, subject to the derating curve, but no IP rating or outdoor-use classification is listed. For that reason, it is better treated as a component for protected indoor enclosures rather than direct outdoor exposure.

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Mean Well IRM-02-3.3S Switching Power Supply 2W 3.3V 600mA - Encapsulated
Mean Well

Mean Well IRM-02-3.3S Switching Power Supply 2W 3.3V 600mA - Encapsulated

$7.47 USD

IRM-02-3.3S is the 3.3V output model of this series: rated current 600mA, rated power 2W, typical efficiency 66%. Type S: SMD style.

IRM-02 is a 2W miniature (33.7*22.2*15mm) 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 a universal input voltage range of 85~305Vac. The phenolic case and potted with silicone enhance the heat dissipation and meet the anti-vibration demand up to 5G; moreover, it provides the fundamental resistance to dust and moisture. With the high efficiency up to 77% and the extremely low no-load power consumption below 0.075W, IRM-02 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. In addition to module-type model, IRM-02 series also offers the SMD style model.

Features

  • Universal AC input / Full range
  • No load power consumption<0.075W
  • Compact size
  • Comply with BS EN/EN55032 Class B without any additional components
  • Wide operating temp. range -30~85℃
  • Protections: Short circuit / Overload / Over voltage
  • Cooling by free air convection
  • Isolation ClassⅡ
  • High reliability, low cost
  • 3 years warranty

Typical applications

  • Industrial electrical equipment
  • Mechanical equipment
  • Factory automation equipment
  • Handheld electronic device

Model

  • 1W 3.3V
  • 1W +S 3.3V
  • 2W 3.3V
  • 2W +S 3.3V
  • 3W 3.3V
  • 3W +S 3.3V
  • 5W 3.3V
  • 10W 3.3V
  • 15W 3.3V
  • 20W 3.3V
View product

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