MEAN WELL IOB-15 series: Industrial AC-DC power module - IOB-15-03A

Description

IOB-15-03A — Industrial AC-DC power module

MEAN WELL IOB-15-03A is an open-frame PCB power module with 3.3 V DC output at 3 A and a catalog rating of 9.9 W. It accepts 85–305 V AC or 100–430 V DC and uses natural convection. The A suffix selects the edge-connector mechanical configuration. Required external circuit components and derating conditions apply.

Download MEAN WELL IOB-15 Datasheet (PDF)
Download MEAN WELL EMI Testing Guidance (PDF)

IOB-15 series: datasheet PDF pages 9–19, specification edition 2025-09-23.

Model and output

Model and construction IOB-15-03A; industrial open-frame AC-DC power module for assembly on the system main PCB. Type A: edge-connector mounting; compact 1.75 × 0.86 inch series format. The suffix identifies the mechanical configuration.
DC output voltage 3.3 V DC
Rated output current 3 A
Output current range 0–3 A; observe the input-voltage, temperature and external-component requirements.
Rated output power 9.9 W
Ripple and noise 150 mV maximum; measured with 20 MHz bandwidth and a 12-inch twisted pair terminated with 0.1 µF and 47 µF capacitors in parallel.
Initial set-point accuracy ±3%
Line regulation ±0.5%
Load regulation ±2%
Capacitive load 20000 µF maximum; this load limit is separate from the required circuit capacitors below.

Input and efficiency

Input voltage 85–305 V AC, including 277 V AC; 100–430 V DC.
AC input frequency 47–63 Hz
Efficiency 75% typical
AC input current 0.4 A at 115 V AC / 0.25 A at 230 V AC, typical.
Inrush current 18 A at 115 V AC / 35 A at 230 V AC, typical.
No-load power consumption <0.25 W
Measurement conditions Unless stated otherwise, specifications are measured at 230 V AC input, rated load and 25°C ambient. Setup time is assessed at the first cold start; repeated power switching may increase it.

Protection and insulation

Short-circuit protection Continuous short-circuit protection with hiccup operation and automatic recovery.
Overload protection Above 110% of rated output power; hiccup mode with automatic recovery after the fault is removed.
Overvoltage protection Output-voltage clamp; 9 V DC maximum.
Safety classification and standard Safety Class II. LVD IEC 62368-1 approved; the finished equipment must meet its applicable safety requirements.
Dielectric withstand Input to output: 3 kV AC, with leakage current <5 mA during the withstand test.
Insulation resistance Input to output: 1000 MΩ at 500 V DC, 25°C and 70% RH.

Temperature and operating limits

Cooling and working temperature Natural free-air convection; −40 to +85°C, subject to the applicable derating curve. Starting at −40°C requires a solid output capacitor to meet the derating requirements.
Temperature derating The curve shows 40% load at −40°C, 100% from −25 to +55°C and 10% at +85°C. Use the required low-temperature output-capacitor arrangement.
Input-voltage derating At 25°C, the AC curve shows 75% load at 85 V AC, 100% from 100 to 277 V AC and 80% at 305 V AC.
Humidity and storage Working: 20–90% RH, non-condensing. Storage: −40 to +105°C and 10–95% RH, non-condensing.
Temperature coefficient ±0.15%/°C maximum over 0–85°C.
Vibration 10–500 Hz, 2 G, 10 minutes per cycle; 60 minutes each along X, Y and Z.

Required external circuit components

Primary capacitor C1 and fuse Required C1: 33 µF/450 V across +V(cap) and −V(cap). The basic component-selection table specifies a required 1 A/300 V fuse; use the fuse type and rating of the selected complete EMC reference circuit.
Output filter C2, L1 and C3 Required C2: 470 µF/16 V polymer capacitor. Required L1: 2.2 µH, 22 mΩ maximum. Required C3: 220 µF/16 V. Follow the complete circuit on PDF page 11.
C4, CY1 and TVS C4: 0.1 µF/50 V. CY1: 2.2 nF/400 V AC, required. The TVS reference for this output is SMBJ7.0A.
Output-capacitor selection C2 and C3 are recommended to be high-frequency electrolytic capacitors with low ESR. For −40°C operation, the catalog recommends polymer capacitors with at least 20% voltage-rating margin. Required external components are system-design parts; their listing does not imply that they are included with the module.

EMC reference circuits

General AC reference circuit 85–305 V AC, −40 to +85°C; emissions Class A / immunity Class III reference. NTC: 10D-10; LDM: 1.2 mH, 0.4 A minimum / 4 Ω maximum; CX: 0.1 µF/310 V AC; fuse: 1 A/300 V slow-blow. Use the required basic circuit components above.
Indoor general AC reference circuit 85–305 V AC, −25 to +55°C; emissions Class B / immunity Class III reference. NTC: 10D-10; CY1/CY2: 2.2 nF/400 V AC; LCM: 10 mH, 0.4 A minimum / 600 mΩ maximum; LDM: 0.33 mH, 0.4 A minimum / 1 Ω maximum; CX: 0.22 µF/310 V AC; fuse: 1 A/300 V slow-blow.
Indoor industrial AC reference circuit 85–305 V AC, −25 to +55°C; emissions Class B / immunity Class IV reference. MOV: S14K350; CY1: 2.2 nF/400 V AC; LCM: 10 mH, 0.4 A minimum / 600 mΩ maximum; LDM: 0.33 mH, 0.4 A minimum / 1 Ω maximum; CX: 0.22 µF/310 V AC; required R1: 12 Ω/3 W wirewound; fuse: 2 A/300 V slow-blow.
Outdoor general AC reference circuit 85–305 V AC, −40 to +85°C; emissions Class A / immunity Class IV reference. MOV: D14K350; LDM: 1.2 mH, 0.4 A minimum / 4 Ω maximum; CX: 0.1 µF/310 V AC; required R1: 12 Ω/3 W wirewound; fuse: 2 A/300 V slow-blow.
Reference-circuit selection Use the complete selected circuit on PDF pages 12–14. Where R1 is specified, use a wirewound resistor rather than a chip or carbon-film type. For the household indoor-general circuit, use two 2.2 nF/400 V AC Y capacitors in series; the non-household arrangement may use one 2.2 nF/400 V AC CY capacitor. An outdoor application circuit does not provide a protective enclosure or an IP rating.

EMC performance and system verification

Conducted and radiated emissions BS EN/EN 55032 (CISPR 32): Class A without additional EMC components; Class B with the prescribed EMC components. The basic required circuit components are still needed. Select a complete reference circuit appropriate to the application and verify the finished equipment.
ESD and radiated immunity BS EN/EN 61000-4-2: Level 3, ±6 kV contact; performance criterion B. BS EN/EN 61000-4-3: Level 3, performance criterion A.
EFT and surge immunity BS EN/EN 61000-4-4: Level 2, ±2 kV. BS EN/EN 61000-4-5: Level 2, ±1 kV line-to-line.
Conducted immunity and voltage dips BS EN/EN 61000-4-6: Level 2, 10 Vrms, performance criterion A. BS EN/EN 61000-4-11: 0% and 70% voltage-dip/interruption tests, performance criterion B.

Mechanical details and reliability

Dimensions Type A edge-connector construction: 44.5 × 25 × 15 mm (L × W × H); these overall body dimensions are marked maximum in the mechanical drawing.
Pin assignment 1 = AC/N; 3 = AC/L; 5 = +V(cap); 7 = −V(cap); 14 = −Vout; 16 = +Vout. The V(cap) pins connect the primary bulk capacitor; use the separate Vout pins for the load.
PCB footprint Use the top-view edge-connector footprint on PDF page 15. It uses a 2.54 × 2.54 mm reference grid and 2.2 × 1.4 mm slots. The connection tabs are 1.5 mm wide and project 3 mm. Pin-section tolerance is ±0.3 mm; the general drawing tolerance is ±0.5 mm.
Weight and packing reference 11.2 g, catalog packing reference per unit; not a measured net weight. Catalog packing: 49 pieces per tray and 637 pieces in 13 trays per carton. Packing quantities describe the manufacturer arrangement, not the quantity supplied by this listing.
MTBF >10,000 K hours typical, MIL-HDBK-217F at 25°C; this reliability estimate is not a service-life or warranty duration.
Applications and warranty For industrial electrical and mechanical equipment, factory automation, hand-held electronic devices, smart homes, industrial control and related compact embedded systems. The manufacturer catalog states a 3-year warranty; applicable manufacturer terms govern.

Component EMI testing guidance

EMC system verification This converter is a component power supply. Reconfirm EMC in the finished equipment with the converter installed and connected to its load; application, wiring and assembly affect the result.
EMI test guidance The linked guidance describes representative tests on a metal plate with twisted output wires laid flat within the plate area. Select a test arrangement that represents the intended application.

MEAN WELL IOB-15 series: Industrial AC-DC power module - IOB-15-03A

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IOB-15-03A — Industrial AC-DC power module MEAN WELL IOB-15-03A is an open-frame PCB power module with 3.3 V DC output... Read more

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    Description

    IOB-15-03A — Industrial AC-DC power module

    MEAN WELL IOB-15-03A is an open-frame PCB power module with 3.3 V DC output at 3 A and a catalog rating of 9.9 W. It accepts 85–305 V AC or 100–430 V DC and uses natural convection. The A suffix selects the edge-connector mechanical configuration. Required external circuit components and derating conditions apply.

    Download MEAN WELL IOB-15 Datasheet (PDF)
    Download MEAN WELL EMI Testing Guidance (PDF)

    IOB-15 series: datasheet PDF pages 9–19, specification edition 2025-09-23.

    Model and output

    Model and construction IOB-15-03A; industrial open-frame AC-DC power module for assembly on the system main PCB. Type A: edge-connector mounting; compact 1.75 × 0.86 inch series format. The suffix identifies the mechanical configuration.
    DC output voltage 3.3 V DC
    Rated output current 3 A
    Output current range 0–3 A; observe the input-voltage, temperature and external-component requirements.
    Rated output power 9.9 W
    Ripple and noise 150 mV maximum; measured with 20 MHz bandwidth and a 12-inch twisted pair terminated with 0.1 µF and 47 µF capacitors in parallel.
    Initial set-point accuracy ±3%
    Line regulation ±0.5%
    Load regulation ±2%
    Capacitive load 20000 µF maximum; this load limit is separate from the required circuit capacitors below.

    Input and efficiency

    Input voltage 85–305 V AC, including 277 V AC; 100–430 V DC.
    AC input frequency 47–63 Hz
    Efficiency 75% typical
    AC input current 0.4 A at 115 V AC / 0.25 A at 230 V AC, typical.
    Inrush current 18 A at 115 V AC / 35 A at 230 V AC, typical.
    No-load power consumption <0.25 W
    Measurement conditions Unless stated otherwise, specifications are measured at 230 V AC input, rated load and 25°C ambient. Setup time is assessed at the first cold start; repeated power switching may increase it.

    Protection and insulation

    Short-circuit protection Continuous short-circuit protection with hiccup operation and automatic recovery.
    Overload protection Above 110% of rated output power; hiccup mode with automatic recovery after the fault is removed.
    Overvoltage protection Output-voltage clamp; 9 V DC maximum.
    Safety classification and standard Safety Class II. LVD IEC 62368-1 approved; the finished equipment must meet its applicable safety requirements.
    Dielectric withstand Input to output: 3 kV AC, with leakage current <5 mA during the withstand test.
    Insulation resistance Input to output: 1000 MΩ at 500 V DC, 25°C and 70% RH.

    Temperature and operating limits

    Cooling and working temperature Natural free-air convection; −40 to +85°C, subject to the applicable derating curve. Starting at −40°C requires a solid output capacitor to meet the derating requirements.
    Temperature derating The curve shows 40% load at −40°C, 100% from −25 to +55°C and 10% at +85°C. Use the required low-temperature output-capacitor arrangement.
    Input-voltage derating At 25°C, the AC curve shows 75% load at 85 V AC, 100% from 100 to 277 V AC and 80% at 305 V AC.
    Humidity and storage Working: 20–90% RH, non-condensing. Storage: −40 to +105°C and 10–95% RH, non-condensing.
    Temperature coefficient ±0.15%/°C maximum over 0–85°C.
    Vibration 10–500 Hz, 2 G, 10 minutes per cycle; 60 minutes each along X, Y and Z.

    Required external circuit components

    Primary capacitor C1 and fuse Required C1: 33 µF/450 V across +V(cap) and −V(cap). The basic component-selection table specifies a required 1 A/300 V fuse; use the fuse type and rating of the selected complete EMC reference circuit.
    Output filter C2, L1 and C3 Required C2: 470 µF/16 V polymer capacitor. Required L1: 2.2 µH, 22 mΩ maximum. Required C3: 220 µF/16 V. Follow the complete circuit on PDF page 11.
    C4, CY1 and TVS C4: 0.1 µF/50 V. CY1: 2.2 nF/400 V AC, required. The TVS reference for this output is SMBJ7.0A.
    Output-capacitor selection C2 and C3 are recommended to be high-frequency electrolytic capacitors with low ESR. For −40°C operation, the catalog recommends polymer capacitors with at least 20% voltage-rating margin. Required external components are system-design parts; their listing does not imply that they are included with the module.

    EMC reference circuits

    General AC reference circuit 85–305 V AC, −40 to +85°C; emissions Class A / immunity Class III reference. NTC: 10D-10; LDM: 1.2 mH, 0.4 A minimum / 4 Ω maximum; CX: 0.1 µF/310 V AC; fuse: 1 A/300 V slow-blow. Use the required basic circuit components above.
    Indoor general AC reference circuit 85–305 V AC, −25 to +55°C; emissions Class B / immunity Class III reference. NTC: 10D-10; CY1/CY2: 2.2 nF/400 V AC; LCM: 10 mH, 0.4 A minimum / 600 mΩ maximum; LDM: 0.33 mH, 0.4 A minimum / 1 Ω maximum; CX: 0.22 µF/310 V AC; fuse: 1 A/300 V slow-blow.
    Indoor industrial AC reference circuit 85–305 V AC, −25 to +55°C; emissions Class B / immunity Class IV reference. MOV: S14K350; CY1: 2.2 nF/400 V AC; LCM: 10 mH, 0.4 A minimum / 600 mΩ maximum; LDM: 0.33 mH, 0.4 A minimum / 1 Ω maximum; CX: 0.22 µF/310 V AC; required R1: 12 Ω/3 W wirewound; fuse: 2 A/300 V slow-blow.
    Outdoor general AC reference circuit 85–305 V AC, −40 to +85°C; emissions Class A / immunity Class IV reference. MOV: D14K350; LDM: 1.2 mH, 0.4 A minimum / 4 Ω maximum; CX: 0.1 µF/310 V AC; required R1: 12 Ω/3 W wirewound; fuse: 2 A/300 V slow-blow.
    Reference-circuit selection Use the complete selected circuit on PDF pages 12–14. Where R1 is specified, use a wirewound resistor rather than a chip or carbon-film type. For the household indoor-general circuit, use two 2.2 nF/400 V AC Y capacitors in series; the non-household arrangement may use one 2.2 nF/400 V AC CY capacitor. An outdoor application circuit does not provide a protective enclosure or an IP rating.

    EMC performance and system verification

    Conducted and radiated emissions BS EN/EN 55032 (CISPR 32): Class A without additional EMC components; Class B with the prescribed EMC components. The basic required circuit components are still needed. Select a complete reference circuit appropriate to the application and verify the finished equipment.
    ESD and radiated immunity BS EN/EN 61000-4-2: Level 3, ±6 kV contact; performance criterion B. BS EN/EN 61000-4-3: Level 3, performance criterion A.
    EFT and surge immunity BS EN/EN 61000-4-4: Level 2, ±2 kV. BS EN/EN 61000-4-5: Level 2, ±1 kV line-to-line.
    Conducted immunity and voltage dips BS EN/EN 61000-4-6: Level 2, 10 Vrms, performance criterion A. BS EN/EN 61000-4-11: 0% and 70% voltage-dip/interruption tests, performance criterion B.

    Mechanical details and reliability

    Dimensions Type A edge-connector construction: 44.5 × 25 × 15 mm (L × W × H); these overall body dimensions are marked maximum in the mechanical drawing.
    Pin assignment 1 = AC/N; 3 = AC/L; 5 = +V(cap); 7 = −V(cap); 14 = −Vout; 16 = +Vout. The V(cap) pins connect the primary bulk capacitor; use the separate Vout pins for the load.
    PCB footprint Use the top-view edge-connector footprint on PDF page 15. It uses a 2.54 × 2.54 mm reference grid and 2.2 × 1.4 mm slots. The connection tabs are 1.5 mm wide and project 3 mm. Pin-section tolerance is ±0.3 mm; the general drawing tolerance is ±0.5 mm.
    Weight and packing reference 11.2 g, catalog packing reference per unit; not a measured net weight. Catalog packing: 49 pieces per tray and 637 pieces in 13 trays per carton. Packing quantities describe the manufacturer arrangement, not the quantity supplied by this listing.
    MTBF >10,000 K hours typical, MIL-HDBK-217F at 25°C; this reliability estimate is not a service-life or warranty duration.
    Applications and warranty For industrial electrical and mechanical equipment, factory automation, hand-held electronic devices, smart homes, industrial control and related compact embedded systems. The manufacturer catalog states a 3-year warranty; applicable manufacturer terms govern.

    Component EMI testing guidance

    EMC system verification This converter is a component power supply. Reconfirm EMC in the finished equipment with the converter installed and connected to its load; application, wiring and assembly affect the result.
    EMI test guidance The linked guidance describes representative tests on a metal plate with twisted output wires laid flat within the plate area. Select a test arrangement that represents the intended application.

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