Mean Well IRM-01-3.3 Switching Power Supply 1W 3.3V 300mA - Encapsulated

Name: Mean Well IRM-01-3.3 Switching Power Supply 1W 3.3V 300mA - Encapsulated
Brand: Mean Well
SKU: IRM-01-3.3
Price: 6.6 USD
Availability: InStock

Overview

IRM-01-3.3 is the 3.3V output model of this series: rated current 300mA, rated power 1W, typical efficiency 66%.

IRM-01 is a 1W 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-01 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

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-01-3.3Specifications from the official datasheet (2026-07-01 edition)

OUTPUT

DC VOLTAGE: 3.3V
RATED CURRENT: 300mA
CURRENT RANGE: 0 ~ 300mA
RATED POWER: 1W
RIPPLE & NOISE (max.)^Note.2: 150mVp-p
VOLTAGE TOLERANCE^Note.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.): 25mA/115Vac 18mA/230Vac 16mA/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

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: 33.7*22.2*15mm (L*W*H)
PACKING: 0.024Kg; 640pcs/ 16.3 Kg/ 0.84CUFT

Test conditions and notes4

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 0.1uf & 47uf 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).

Technical drawings

IRM-01-3.3 Block Diagram — Block Diagram

IRM-01-3.3 Derating Curve — Derating Curve

Typical applications

Industrial electrical equipment
Mechanical equipment
Factory automation equipment
Handheld electronic device

Downloads

Datasheet1

IRM-01-3.3 datasheetIRM-01-SPEC.PDF · 2026-07-01 edition PDF Download

Certificates4

EMC Certificate (IRM-01)(EN) PDF Download

UL Certificate (IRM-01)(EN) PDF Download

CB Certificate (IRM-01)(EN) PDF Download

TUV Certificate (IRM-01)(EN) PDF Download

Test reports1

Test Report (IRM-01-3.3)(EN) PDF Download

Catalogues1

Mean Well Catalog (Industrial) PDF Download

FAQ

Can I use the IRM-01-3.3 for a 3.3V microcontroller or embedded logic board?

Yes, this model is aimed at low-power 3.3V electronics where 1W is enough. With a 3.3V constant voltage output and 1W rating, it fits embedded control, sensing, or monitoring boards that need direct AC-to-DC conversion on the PCB.

Is the IRM-01-3.3 a good fit for industrial monitoring or IoT nodes running at 3.3V?

It can be a fit for compact industrial or embedded nodes that operate from 3.3V and stay within the 1W limit. The 85-305VAC input range is useful when the source side may vary across common AC line conditions.

Can this model power a small 3.3V sensor-processing or communication circuit?

Yes, if the circuit is a low-consumption 3.3V DC load and the total demand remains within the 1W output rating. This makes more sense for compact logic, sensing, or communications sections than for anything with a larger power draw.

Is the IRM-01-3.3 suitable for indoor control panels or outdoor equipment?

Its operating temperature range is -30°C to +85°C, with output derating at higher ambient temperatures per the derating curve. No IP rating is listed, so it is better treated as an internal encapsulated module for protected enclosures rather than exposed outdoor service.

What are the main output options around the IRM-01-3.3 in the IRM family?

In the 1W IRM-01 series, the related models are 3.3V 300mA, 5V 200mA, 9V 111mA, 12V 83mA, 15V 67mA, and 24V 42mA. All six share the 85-305VAC input and the 33.7 × 22.2 × 15 mm encapsulated package; the 3.3V version has the lowest typical efficiency of the series at 66%.

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