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Mean Well IOB-05-03 AC-DC On Board Type Power Module 3.3W 3.3V 1A

Name: Mean Well IOB-05-03 AC-DC On Board Type Power Module 3.3W 3.3V 1A
Brand: Mean Well
SKU: IOB-05-03
Price: 6.51 USD
Availability: InStock

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Overview

IOB-05-03 is the 3.3V output model of this series: rated current 1A, rated power 3.3W, typical efficiency 69%.

The IOB-05 series is a compact and reliable AC-DC open frame power module featuring high efficiency and low power consumption. It is particularly well-suited for space-constrained applications with stringent energy efficiency requirements. The product features a compact design and supports universal input voltage range of 85~305Vac.With ultra-low standby power consumption <0.15W, it is energy efficiency and eco-friendly. It also offers an ultra-wide operating temperature range of -40℃~+85℃ as well as complete protection functions to ensure safe and reliable operation. These features make the product suitable for applications with strict space constraints, such as industrial automation, power metering, and smart devices.

Features

Assemble on the main PCB of the system
1.03x0.58x0.43inch compact size
85~305Vac input (277Vac available)
No load power consumption <0.15W
-40~85℃ wide operating temperature
Protections: Short circuit / Overload / Over voltage
Cooling by free air convection
Safety Class Ⅱ
3 years warranty

Specifications

IOB-05-03Specifications from the official datasheet (2025-09-12 edition)Download datasheet PDF

OUTPUT

DC VOLTAGE: 3.3V
RATED CURRENT: 1A
CURRENT RANGE: 0.1 ~ 1A
RATED POWER: 3.3W
RIPPLE & NOISE (max.)^Note.2: 150mV
INITIAL SET POINT ACCURACY: ±5% @10% ~ 100% load
LINE REGULATION: ±1.5%
LOAD REGULATION: ±3%
CAPACITOR LOAD (Max.): 2200μF

INPUT

VOLTAGE RANGE: 85 ~ 305Vac 100 ~ 430Vdc
FREQUENCY RANGE: 47 ~ 63Hz
EFFICIENCY (Typ.): 69%
AC CURRENT (Typ.): 0.2A/115Vac 0.1A/230Vac
INRUSH CURRENT (Typ.): 20A/115Vac 40A/230Vac
NO LOAD POWER CONSUMPTION: <0.15W

PROTECTION

SHORT CIRCUIT: Protection type : Continuous, automatic recovery, Hiccup mode
OVERLOAD: >110% rated output power Protection type : Hiccup mode, recovers automatically after fault condition is removed
OVER VOLTAGE (Max.): 9Vdc Protection type : Output voltage clamp

ENVIRONMENT

COOLING: Free-air convection
WORKING TEMP.^Note.4: -40 ~ +85℃ (Refer to "Derating Curve")
WORKING HUMIDITY: 20% ~ 90% RH non-condensing
STORAGE TEMP., HUMIDITY: -40 ~ +105℃, 10 ~ 95% RH non-condensing
TEMP. COEFFICIENT: ±0.15% / ℃ max. (0 ~ 85℃)
VIBRATION: 10 ~ 500Hz, 2G 10min./1cycle, period for 60min. each along X, Y, Z axes

SAFETY & EMC (Note.5)

SAFETY STANDARDS: LVD IEC62368-1 approved
WITHSTAND VOLTAGE: I/P-O/P:3KVac leakage current <5mA
ISOLATION RESISTANCE: I/P-O/P:1000M Ohms / 500Vdc / 25℃ / 70% RH
EMC EMISSION: Parameter Standard Test Level

Conducted BS EN/EN55032(CISPR32) Class A without external components
Radiated BS EN/EN55032(CISPR32) Class B with external components
EMC IMMUNITY: Parameter Standard Test Level

ESD BS EN/EN61000-4-2 Level 3, ±6KV contact
Radiated Susceptibility BS EN/EN61000-4-3 Level 3, 10m/V
EFT/Bursts BS EN/EN61000-4-4 Level 2, ±2KV
Surge BS EN/EN61000-4-5 Level 2, ±1KV Line-Line
Conducted BS EN/EN61000-4-6 Level 3, 10V(e.m.f.)
Voltage Dips and Interruptions BS EN/EN61000-4-11 0%, 70% perf. Criteria B

Parameter	Standard	Test Level
Conducted	BS EN/EN55032(CISPR32)	Class A without external components
Radiated	BS EN/EN55032(CISPR32)	Class B with external components

Parameter	Standard	Test Level
ESD	BS EN/EN61000-4-2	Level 3, ±6KV contact
Radiated Susceptibility	BS EN/EN61000-4-3	Level 3, 10m/V
EFT/Bursts	BS EN/EN61000-4-4	Level 2, ±2KV
Surge	BS EN/EN61000-4-5	Level 2, ±1KV Line-Line
Conducted	BS EN/EN61000-4-6	Level 3, 10V(e.m.f.)
Voltage Dips and Interruptions	BS EN/EN61000-4-11	0%, 70% perf. Criteria B

OTHERS

MTBF (Typ.): >10000Khrs MIL-HDBK-217F(25℃)
DIMENSION (L*W*H): 26.4*14.73*11mm (1.039*0.579*0.433 inch)
PACKING: 5.45g ; 150pcs/per Tray, 1500pcs/10 Tray/per carton

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.Length of set up time is measured at first cold start. Turning ON/OFF the power supply may lead to increase of the set up time.
4.When starting at a low temperature of -40℃, the output capacitor needs to be equipped with a solid capacitor to meet the load reduction curve requirements.
5.The final equipment must be re-confirm that it still meet EMC directives. For guidance on how to perform these EMC tests, please refer to “EMI testing of component power supplies.”(as available on http://www.meanwell.com)

Technical drawings

IOB-05-03 Additional Circuit Design Reference — Additional Circuit Design Reference

IOB-05-03 Additional EMC Suggestion Circuit — Additional EMC Suggestion Circuit

IOB-05-03 I O B - 0 5 series — I O B - 0 5 series

IOB-05-03 3.Circuit 3 - Indoor General Environment — 3.Circuit 3 - Indoor General Environment

IOB-05-03 Immunity Emissions — Immunity Emissions

IOB-05-03 Pin Assignment — Pin Assignment

Typical applications

Downloads

Datasheet1

IOB-05-03 datasheetIOB_05_Spec_Sheet.pdf · 2025-09-12 edition PDF Download

Catalogues2

Mean Well DC-DC Catalog PDF Download

Mean Well Catalog (Industrial) PDF Download

FAQ

What is the Mean Well IOB-05-03 used for?

The IOB-05-03 is a compact AC-DC on-board power module designed for systems that need a regulated 3.3V DC output. With a 3.3W power rating and 1A rated current, it suits low-power embedded and control applications where board space is limited.

What are the key electrical specifications of the IOB-05-03?

This model provides a 3.3V DC output at up to 1A, for a total rated power of 3.3W. It accepts a wide 85 to 305Vac input range and can also operate from 100 to 430Vdc input.

Is the IOB-05-03 suitable for wide input voltage environments?

Yes. The IOB-05-03 supports a broad 85 to 305Vac input range, which makes it suitable for equipment used across different mains conditions. That wide range can simplify product selection for OEMs serving multiple markets.

Can the IOB-05-03 operate in demanding temperature conditions?

This module is rated for operation from -40°C to +85°C, which is wider than many standard indoor-only power modules. That makes it a practical option for equipment exposed to cold starts or elevated internal enclosure temperatures, subject to the product's derating guidance.

What protection features are included in the Mean Well IOB-05-03?

The IOB-05-03 includes short circuit, overload, and over voltage protection. Short circuit protection is continuous with automatic recovery in hiccup mode, and overload protection also recovers automatically after the fault condition is removed.

How compact is the IOB-05-03 compared with larger enclosed power supplies?

The IOB-05-03 is designed as an on-board module with a 26.4 x 14.73 x 11mm body, roughly a 1 inch by 0.6 inch footprint. Compared with larger enclosed or chassis-mount supplies, it is intended for applications where compact size and direct PCB integration are priorities.

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