MEAN WELL IRM-45 series: Encapsulated AC/DC Power Module - IRM-45-48

Description

MEAN WELL IRM-45-48 is an encapsulated industrial AC/DC power module with PCB mounting, 48 V output, 0.94 A continuous rated current and 45.12 W rated output power under the specified conditions. It uses free-air convection cooling and Class II insulation without an FG pin.

Product Datasheet

Download MEAN WELL IRM-45 Datasheet (PDF)

The IRM-45 section is on PDF pages 29, 30, 31, 32. Refer to the complete mechanical drawings and notes when planning installation.

Model Code and Construction

Complete model IRM-45-48
Series IRM-45 industrial AC/DC power module.
Output code 48 V nominal DC output.
Mounting suffix No suffix means PCB mounting style.
Housing 94V-0 flame-retardant plastic case with silicone potting for heat dissipation and fundamental resistance to dust and moisture.

Typical applications include industrial electrical equipment, mechanical equipment, factory automation and handheld electronic devices. Select the actual mounting version when designing the assembly; the PCB and ST versions have different dimensions, connections, weight and vibration ratings.

Output Ratings and Performance

Nominal DC voltage 48 V.
Continuous rated current 0.94 A.
Catalogue-rated output power 45.12 W.
Output current range 0–0.94 A.
Ripple and noise, maximum 300 mVp-p.
Voltage tolerance ±2.5%; includes setup tolerance, line regulation and load regulation.
Line regulation ±0.5%.
Load regulation ±0.5%.
Efficiency, typical 90.5%.

Ripple and noise are measured at 20 MHz bandwidth with a 12-inch twisted pair terminated by 0.1 µF and 47 µF capacitors in parallel. Catalogue power and current retain their printed precision.

Input and Timing

Input voltage 85–305 VAC.
AC frequency 47–440 Hz.
AC current, typical 1.5 A at 115 VAC; 0.9 A at 230 VAC; 0.75 A at 277 VAC.
Cold-start inrush, typical 30 A at 115 VAC; 60 A at 230 VAC.
Setup / rise time 1000 ms / 30 ms at 230 VAC; 2000 ms / 30 ms at 115 VAC, full load.
Hold-up time, typical 50 ms at 230 VAC; 12 ms at 115 VAC, full load.
No-load power consumption Less than 0.15 W.
Leakage current Less than 0.25 mA at 277 VAC.
Block-diagram switching frequency 65 kHz.

Unless stated otherwise, catalogue parameters are measured at 230 VAC input, rated load and 25°C ambient. Typical values are not guaranteed minima.

Protection

Short circuit / overload Short-circuit protection is listed. Overload operates at 115–160% of rated output power: hiccup mode with automatic recovery after the fault is removed.
Overvoltage threshold 50.4–64.8 V.
Overvoltage action Output voltage shuts off and is clamped by a zener diode.

Protection thresholds are not additional continuous-output or peak-power ratings.

Cooling, Derating and Environment

Cooling Free-air convection; the ambient derating graph is for horizontal mounting.
Operating temperature −30 to +85°C, subject to all applicable derating curves.
Temperature/load limits The 100 VAC curve permits full load through 50°C, then 75% at 60°C, 50% at 70°C, 33% at 80°C and 25% at 85°C. The shaded −30 to −25°C region is for 230 VAC input only.
Input/load limits At 60 Hz: 80% load at 85 VAC, increasing to 100% at 100 VAC; 100% from 100 to 305 VAC.
Working humidity 20–90% RH, non-condensing.
Storage −40 to +85°C; 10–95% RH.
Temperature coefficient ±0.03%/°C over 0–50°C.
Vibration for this version 2 G, 10–500 Hz, 10 minutes per cycle; 60 minutes each along X, Y and Z.
Operating altitude The specification lists 2,000 m.
Altitude note The general catalogue note states 3.5°C ambient-temperature derating per 1,000 m above 2,000 m for fanless models. This note does not by itself extend the listed 2,000 m operating or approval limit.

Use the complete published curves for intermediate conditions. Apply input-voltage, ambient-temperature, installation and any peak-load restrictions together; +85°C is not a full-load operating point.

Mechanical Layout and Installation

Catalogue dimensions, L × W × H 87 × 52 × 29.5 mm.
Mechanical drawing tolerance ±1 mm, unless an individual dimension is separately toleranced.
PCB connection view BOTTOM VIEW: at the upper right, upper pin AC/L and lower pin AC/N. At the lower left, upper output pin −V and lower output pin +V.
PCB footprint Input spacing 6.75 mm; output spacing 5.5 mm. Pin-column horizontal spacing 76 mm, left column 5.7 mm from the left edge. The input upper pin is 5 mm from the top; output upper pin is 40.75 mm from the top.
PCB pin dimensions Input pins Ø1 mm and output pins Ø2 mm; projection 3.5 ±1 mm. Use the exact bottom-view footprint.
Soldering limits Wave soldering: 265°C for 5 seconds maximum. Manual soldering: 390°C for 3 seconds maximum.

Use the version-specific drawing for the mounting footprint and polarity. The assigned catalogue pages do not state a separate accessory, mating connector or conversion-kit order code; do not assume a PCB module can be converted to an ST model by adding an unlisted kit.

Follow the manufacturer installation instructions and actual terminal markings. No terminal tightening torque, wire gauge, installation clearance or separately supplied mounting screw is specified in these pages.

Safety and EMC

Insulation design Class II, with no FG pin.
Input-to-output withstand voltage 4.2 kVAC.
Input-to-output insulation resistance 100 MΩ at 500 VDC, 25°C and 70% RH.
Listed safety approvals IEC62368-1; IEC61558-1/-2-16; UL62368-1; TUV BS EN/EN62368-1; BS EN/EN60335-1; BS EN/EN61558-1/-2-16; EAC TP TC004; BSMI CNS15598-1.
Overvoltage category IEC/EN61558-1/-2-16 and IEC/EN/UL62368-1: OVC III up to 2,000 m. IEC/EN60335-1: OVC II up to 2,000 m.
Limited power source scope The catalogue LPS statement applies to this output version.
Conducted and radiated emissions BS EN/EN55032 (CISPR32) and CNS15936: Class B. Built-in EMI filtering supports the catalogue Class B statement without additional components.
Harmonics and flicker BS EN/EN61000-3-2: Class A harmonic current; BS EN/EN61000-3-3 voltage flicker.
Immunity framework BS EN/EN55035 and BS EN/EN61000-6-2.

ESD, BS EN/EN61000-4-2: 8 kV air, Level 3; 4 kV contact, Level 2, criterion A. RF field (-4-3), EFT/burst (-4-4) and conducted immunity (-4-6): Level 3, criterion A. Surge (-4-5): 2 kV line-to-neutral, Level 4, criterion A. Magnetic field (-4-8): Level 4, criterion A.

BS EN/EN61000-4-11: greater than 95% dip for 0.5 periods, 30% dip for 25 periods, and greater than 95% interruption for 250 periods.

The final equipment must be checked for EMC compliance in its installed configuration. Silicone potting provides fundamental resistance to dust and moisture; these pages do not assign an IP ingress-protection rating.

Weight, Reliability and Catalogue Reference

Catalogue unit-weight reference 195 g, from the explicit 0.195 kg per-unit PACKING entry for this mounting version; not a measured net or shipping weight.
Carton reference 60 pieces / 12.7 kg / 0.94 CUFT; not used to calculate unit weight.
Minimum MTBF estimates 6451.1 thousand hours by Telcordia SR-332 (Bellcore); 1212.1 thousand hours by MIL-HDBK-217F at 25°C.
Manufacturer warranty statement The catalogue lists a three-year warranty; manufacturer terms apply.
Specification revision IRM-45-SPEC, 2025-11-21; combined PDF pages 29–32.

MTBF is a statistical reliability estimate, not a guaranteed service life.

MEAN WELL IRM-45 series: Encapsulated AC/DC Power Module - IRM-45-48

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MEAN WELL IRM-45-48 is an encapsulated industrial AC/DC power module with PCB mounting, 48 V output, 0.94 A continuous rated... Read more

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    Description

    MEAN WELL IRM-45-48 is an encapsulated industrial AC/DC power module with PCB mounting, 48 V output, 0.94 A continuous rated current and 45.12 W rated output power under the specified conditions. It uses free-air convection cooling and Class II insulation without an FG pin.

    Product Datasheet

    Download MEAN WELL IRM-45 Datasheet (PDF)

    The IRM-45 section is on PDF pages 29, 30, 31, 32. Refer to the complete mechanical drawings and notes when planning installation.

    Model Code and Construction

    Complete model IRM-45-48
    Series IRM-45 industrial AC/DC power module.
    Output code 48 V nominal DC output.
    Mounting suffix No suffix means PCB mounting style.
    Housing 94V-0 flame-retardant plastic case with silicone potting for heat dissipation and fundamental resistance to dust and moisture.

    Typical applications include industrial electrical equipment, mechanical equipment, factory automation and handheld electronic devices. Select the actual mounting version when designing the assembly; the PCB and ST versions have different dimensions, connections, weight and vibration ratings.

    Output Ratings and Performance

    Nominal DC voltage 48 V.
    Continuous rated current 0.94 A.
    Catalogue-rated output power 45.12 W.
    Output current range 0–0.94 A.
    Ripple and noise, maximum 300 mVp-p.
    Voltage tolerance ±2.5%; includes setup tolerance, line regulation and load regulation.
    Line regulation ±0.5%.
    Load regulation ±0.5%.
    Efficiency, typical 90.5%.

    Ripple and noise are measured at 20 MHz bandwidth with a 12-inch twisted pair terminated by 0.1 µF and 47 µF capacitors in parallel. Catalogue power and current retain their printed precision.

    Input and Timing

    Input voltage 85–305 VAC.
    AC frequency 47–440 Hz.
    AC current, typical 1.5 A at 115 VAC; 0.9 A at 230 VAC; 0.75 A at 277 VAC.
    Cold-start inrush, typical 30 A at 115 VAC; 60 A at 230 VAC.
    Setup / rise time 1000 ms / 30 ms at 230 VAC; 2000 ms / 30 ms at 115 VAC, full load.
    Hold-up time, typical 50 ms at 230 VAC; 12 ms at 115 VAC, full load.
    No-load power consumption Less than 0.15 W.
    Leakage current Less than 0.25 mA at 277 VAC.
    Block-diagram switching frequency 65 kHz.

    Unless stated otherwise, catalogue parameters are measured at 230 VAC input, rated load and 25°C ambient. Typical values are not guaranteed minima.

    Protection

    Short circuit / overload Short-circuit protection is listed. Overload operates at 115–160% of rated output power: hiccup mode with automatic recovery after the fault is removed.
    Overvoltage threshold 50.4–64.8 V.
    Overvoltage action Output voltage shuts off and is clamped by a zener diode.

    Protection thresholds are not additional continuous-output or peak-power ratings.

    Cooling, Derating and Environment

    Cooling Free-air convection; the ambient derating graph is for horizontal mounting.
    Operating temperature −30 to +85°C, subject to all applicable derating curves.
    Temperature/load limits The 100 VAC curve permits full load through 50°C, then 75% at 60°C, 50% at 70°C, 33% at 80°C and 25% at 85°C. The shaded −30 to −25°C region is for 230 VAC input only.
    Input/load limits At 60 Hz: 80% load at 85 VAC, increasing to 100% at 100 VAC; 100% from 100 to 305 VAC.
    Working humidity 20–90% RH, non-condensing.
    Storage −40 to +85°C; 10–95% RH.
    Temperature coefficient ±0.03%/°C over 0–50°C.
    Vibration for this version 2 G, 10–500 Hz, 10 minutes per cycle; 60 minutes each along X, Y and Z.
    Operating altitude The specification lists 2,000 m.
    Altitude note The general catalogue note states 3.5°C ambient-temperature derating per 1,000 m above 2,000 m for fanless models. This note does not by itself extend the listed 2,000 m operating or approval limit.

    Use the complete published curves for intermediate conditions. Apply input-voltage, ambient-temperature, installation and any peak-load restrictions together; +85°C is not a full-load operating point.

    Mechanical Layout and Installation

    Catalogue dimensions, L × W × H 87 × 52 × 29.5 mm.
    Mechanical drawing tolerance ±1 mm, unless an individual dimension is separately toleranced.
    PCB connection view BOTTOM VIEW: at the upper right, upper pin AC/L and lower pin AC/N. At the lower left, upper output pin −V and lower output pin +V.
    PCB footprint Input spacing 6.75 mm; output spacing 5.5 mm. Pin-column horizontal spacing 76 mm, left column 5.7 mm from the left edge. The input upper pin is 5 mm from the top; output upper pin is 40.75 mm from the top.
    PCB pin dimensions Input pins Ø1 mm and output pins Ø2 mm; projection 3.5 ±1 mm. Use the exact bottom-view footprint.
    Soldering limits Wave soldering: 265°C for 5 seconds maximum. Manual soldering: 390°C for 3 seconds maximum.

    Use the version-specific drawing for the mounting footprint and polarity. The assigned catalogue pages do not state a separate accessory, mating connector or conversion-kit order code; do not assume a PCB module can be converted to an ST model by adding an unlisted kit.

    Follow the manufacturer installation instructions and actual terminal markings. No terminal tightening torque, wire gauge, installation clearance or separately supplied mounting screw is specified in these pages.

    Safety and EMC

    Insulation design Class II, with no FG pin.
    Input-to-output withstand voltage 4.2 kVAC.
    Input-to-output insulation resistance 100 MΩ at 500 VDC, 25°C and 70% RH.
    Listed safety approvals IEC62368-1; IEC61558-1/-2-16; UL62368-1; TUV BS EN/EN62368-1; BS EN/EN60335-1; BS EN/EN61558-1/-2-16; EAC TP TC004; BSMI CNS15598-1.
    Overvoltage category IEC/EN61558-1/-2-16 and IEC/EN/UL62368-1: OVC III up to 2,000 m. IEC/EN60335-1: OVC II up to 2,000 m.
    Limited power source scope The catalogue LPS statement applies to this output version.
    Conducted and radiated emissions BS EN/EN55032 (CISPR32) and CNS15936: Class B. Built-in EMI filtering supports the catalogue Class B statement without additional components.
    Harmonics and flicker BS EN/EN61000-3-2: Class A harmonic current; BS EN/EN61000-3-3 voltage flicker.
    Immunity framework BS EN/EN55035 and BS EN/EN61000-6-2.

    ESD, BS EN/EN61000-4-2: 8 kV air, Level 3; 4 kV contact, Level 2, criterion A. RF field (-4-3), EFT/burst (-4-4) and conducted immunity (-4-6): Level 3, criterion A. Surge (-4-5): 2 kV line-to-neutral, Level 4, criterion A. Magnetic field (-4-8): Level 4, criterion A.

    BS EN/EN61000-4-11: greater than 95% dip for 0.5 periods, 30% dip for 25 periods, and greater than 95% interruption for 250 periods.

    The final equipment must be checked for EMC compliance in its installed configuration. Silicone potting provides fundamental resistance to dust and moisture; these pages do not assign an IP ingress-protection rating.

    Weight, Reliability and Catalogue Reference

    Catalogue unit-weight reference 195 g, from the explicit 0.195 kg per-unit PACKING entry for this mounting version; not a measured net or shipping weight.
    Carton reference 60 pieces / 12.7 kg / 0.94 CUFT; not used to calculate unit weight.
    Minimum MTBF estimates 6451.1 thousand hours by Telcordia SR-332 (Bellcore); 1212.1 thousand hours by MIL-HDBK-217F at 25°C.
    Manufacturer warranty statement The catalogue lists a three-year warranty; manufacturer terms apply.
    Specification revision IRM-45-SPEC, 2025-11-21; combined PDF pages 29–32.

    MTBF is a statistical reliability estimate, not a guaranteed service life.

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