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Mean Well IOB-15-03B AC-DC On Board Type Power Module 9.9W 3.3V, Horizontal 3A

1.75"x0.86" compact size85~305Vac inputno load power consumption<0.25W

SKU IOB-15-03B

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Overview

IOB-15-03B is the 3.3V output model of this series: rated current 3A, rated power 9.9W, typical efficiency 75%.

The IOB-15 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 <0.25W, 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
1.75''x0.86''compact size
85~305Vac input (277Vac available)
No load power consumption <0.25W
-40~85℃ wide operating temperature
Protections: Short circuit / Overload / Over voltage
Cooling by free air convection
Safety Class Ⅱ
3 years warranty

Specifications

IOB-15-03BSpecifications from the official datasheet (2025-09-23 edition)

OUTPUT

DC VOLTAGE: 3.3V
RATED CURRENT: 3A
CURRENT RANGE: 0 ~ 3A
RATED POWER: 9.9W
RIPPLE & NOISE (max.)^Note.2: 150mV
INITIAL SET POINT ACCURACY: ±3% for 3.3Vdc output, ±2% for other output
LINE REGULATION: ±0.5%
LOAD REGULATION: ±2% for 3.3Vdc output, ±1.5% for 5Vdc output, ±1% for other output
CAPACITOR LOAD (Max.): 20000μF

INPUT

VOLTAGE RANGE: 85 ~ 305Vac 100 ~ 430Vdc
FREQUENCY RANGE: 47 ~ 63Hz
EFFICIENCY (Typ.): 75%
AC CURRENT (Typ.): 0.4A/115Vac 0.25A/230Vac
INRUSH CURRENT (Typ.): 18A/115Vac 35A/230Vac
NO LOAD POWER CONSUMPTION: <0.25W

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 criteria B
Radiated Susceptibility BS EN/EN61000-4-3 Level 3, 10m/V contact criteria A
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 2, 10Vrms Criteria A
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 criteria B
Radiated Susceptibility	BS EN/EN61000-4-3	Level 3, 10m/V contact criteria A
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 2, 10Vrms Criteria A
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): A Type : 44.5*25*15mm (1.751*0.984*0.59 inch) ; B Type : 44.5*25.5*15mm (1.751*1.003*0.59 inch) C Type : 44.5*23*15.5mm (1.751*0.905*0.61 inch)
PACKING: A,B Type :11.2g ; 49pcs/per Tray, 637pcs/13 Tray/per carton C Type :11.2g ; 56pcs/per Tray, 448pcs/8 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-15-03B Additional Circuit Design Reference — Additional Circuit Design Reference

IOB-15-03B Additional EMC Suggestion Circuit — Additional EMC Suggestion Circuit

IOB-15-03B 2.Circuit 2 - Indoor Civil / Indoor General Environment — 2.Circuit 2 - Indoor Civil / Indoor General Environment

IOB-15-03B 3.Circuit 3 - Indoor General Environment — 3.Circuit 3 - Indoor General Environment

IOB-15-03B Immunity Emissions — Immunity Emissions

IOB-15-03B Pin Assignment — Pin Assignment

Typical applications

Downloads

Catalogues2

Mean Well DC-DC Catalog PDF Download

Mean Well Catalog (Industrial) PDF Download

FAQ

What type of applications is the Mean Well IOB-15-03B best suited for?

The IOB-15-03B is designed for on-board power use inside compact electronic equipment where space is limited. Its small 44.5 x 25.5 x 15 mm package, low no-load power draw, and wide operating temperature range make it a practical fit for embedded industrial, control, and OEM system designs.

What input range does the IOB-15-03B support?

This model accepts a very wide input range of 85 to 305Vac, and it also supports 100 to 430Vdc input. That wide range helps when the product needs to be used across varying mains conditions or in designs that may use either AC or DC input sources.

Can the IOB-15-03B be used in demanding temperature conditions?

Yes. The specified operating temperature range is -40 to +85 degrees C, which is broader than many standard enclosed power modules. That makes it better suited to equipment expected to operate in cold starts, warm cabinets, or other industrial environments, provided the overall system stays within the product's derating guidance.

What protection features are included in the IOB-15-03B?

The IOB-15-03B includes short circuit, overload, and over-voltage protection. Short circuit and overload protection use automatic recovery hiccup behavior, which helps protect both the module and the host equipment during abnormal load conditions.

How does the IOB-15-03B differ from larger enclosed power supplies?

The IOB-15-03B is an on-board power module rather than a larger enclosed chassis-style supply. Its value is in compact size, low standby consumption under 0.25W, free-air cooling, and direct integration into space-constrained equipment where a bulkier standalone supply would be less practical.

What certifications and compliance points matter for B2B buyers evaluating the IOB-15-03B?

This model is listed as Safety Class II and approved to LVD IEC62368-1. For B2B buyers, that matters when reviewing component suitability for commercial or industrial equipment that needs recognized safety compliance at the power-module level.

Payment & Security

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Model	Power	Voltage	Current	IP Rating
Mean Well IOB-15-24C AC-DC On Board Type Power Module 15W 24V, Vertical 625mA	15W	24V	0.625A	IP20	View
Mean Well IOB-15-24B AC-DC On Board Type Power Module 15W 24V, Horizontal 625mA	15W	24V	0.625A	IP20	View
Mean Well IOB-15-24A AC-DC On Board Type Power Module 15W 24V, Gold Finger PCB 625mA	15W	24V	0.625A	IP20	View
Mean Well IOB-15-15C AC-DC On Board Type Power Module 15W 15V, Vertical 1A	15W	15V	1A	IP20	View
Mean Well IOB-15-15B AC-DC On Board Type Power Module 15W 15V, Horizontal 1A	15W	15V	1A	IP20	View
Mean Well IOB-15-15A AC-DC On Board Type Power Module 15W 15V, Gold Finger PCB 1A	15W	15V	1A	IP20	View
Mean Well IOB-15-12C AC-DC On Board Type Power Module 15W 12V, Vertical 1.25A	15W	12V	1.25A	IP20	View
Mean Well IOB-15-12B AC-DC On Board Type Power Module 15W 12V, Horizontal 1.25A	15W	12V	1.25A	IP20	View
Mean Well IOB-15-12A AC-DC On Board Type Power Module 15W 12V, Gold Finger PCB 1.25A	15W	12V	1.25A	IP20	View
Mean Well IOB-15-09C AC-DC On Board Type Power Module 15W 9V, Vertical 1.67A	15W	9V	1.67A	IP20	View
Mean Well IOB-15-09B AC-DC On Board Type Power Module 15W 9V, Horizontal 1.67A	15W	9V	1.67A	IP20	View
Mean Well IOB-15-09A AC-DC On Board Type Power Module 15W 9V, Gold Finger PCB 1.67A	15W	9V	1.67A	IP20	View
Mean Well IOB-15-05C AC-DC On Board Type Power Module 14W 5V, Vertical 2.8A	14W	5V	2.8A	IP20	View
Mean Well IOB-15-05B AC-DC On Board Type Power Module 14W 5V, Horizontal 2.8A	14W	5V	2.8A	IP20	View
Mean Well IOB-15-05A AC-DC On Board Type Power Module 14W 5V, Gold Finger PCB 2.8A	14W	5V	2.8A	IP20	View
Mean Well IOB-15-03C AC-DC On Board Type Power Module 9.9W 3.3V, Vertical 3A	9.9W	3.3V	3A	IP20	View
Mean Well IOB-15-03A AC-DC On Board Type Power Module 9.9W 3.3V, Gold Finger PCB 3A	9.9W	3.3V	3A	IP20	View

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