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IRM-20-24 24V 0.84A 20W PCB Mount AC-DC Power Supply Module
Rp170,000.00
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DAPPRA IRM-20-24 (SKU: PM95) is a 20W single output PCB-mount industrial power module with 24V DC / 0.84A output. Universal 85–264 VAC input, compact encapsulated design, 3000VAC isolation, short circuit and overcurrent protection — ideal for embedded systems and space-constrained PCB applications.
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Overview
IRM-20-24 (PM95) Overview
The DAPPRA IRM-20-24 (internal code PM95) is a 20W PCB-mount AC-DC encapsulated power module delivering 24V DC at 0.9A. It belongs to the IRM Series miniature PCB-mount power module platform, which is designed for direct soldering onto a printed circuit board inside industrial control equipment, instrumentation and compact electronic devices.
The module accepts a universal AC input range of 85–264VAC (or 120–370VDC) and provides a regulated 24V output with approximately 85% typical efficiency. Its fully encapsulated construction and free air convection cooling eliminate the need for a fan or external heatsink, making it suitable for space-constrained PCB assemblies where a conventional enclosed or DIN rail power supply will not fit.
The IRM-20-24 is typically used to derive a 24V control rail directly on a control board, sensor interface board or relay driver board. Short circuit, overload and over voltage protection are built in. The module is Class II construction in most configurations, meaning an FG/PE connection is not required for basic operation, although the final equipment must still satisfy its own EMC and safety requirements.
Key Features
IRM-20-24 Key Features
A 20W PCB-mount 24V power module for direct on-board AC-DC conversion.
- 20W Output · 24V / 0.9A24V DC at 0.9A (21.6W) from a compact encapsulated module.
- Universal AC Input 85–264VACFull-range single-phase input; also 120–370VDC. Some IRM-20 variants accept 85–305VAC.
- PCB-Mount Through-Hole PinsDesigned for direct soldering onto a printed circuit board — no DIN rail or chassis mounting required.
- Fully Encapsulated ConstructionPotting compound protects the module against dust, moisture and mechanical vibration.
- Free Air Convection CoolingNo fan, no external heatsink. Reliable operation inside sealed or semi-sealed enclosures.
- ~85% Typical EfficiencyLow heat dissipation for a 20W-class module.
- Short Circuit / Overload / Over Voltage ProtectionBuilt-in protection functions with auto-recovery where applicable.
- Class II Construction (Most Configurations)No FG/PE terminal required for basic operation; simplifies PCB layout and wiring.
- -30°C to +70°C Operating RangeWith derating above +50°C or +60°C depending on load and input voltage.
- Compact 52.4 × 27.2 × 24 mm FootprintFits into tight PCB assemblies and embedded power sections.
Specifications
IRM-20-24 (PM95) Specifications
Output
| Model | IRM-20-24 (PM95) |
| DC Voltage | 24V |
| Rated Current | 0.9A |
| Current Range | 0–0.9A |
| Rated Power | 21.6W |
| Ripple & Noise (max.) | 200mVp-p |
| Voltage Tolerance | ±2.0% |
| Line Regulation | ±0.5% |
| Load Regulation | ±1.0% |
Protection
| Short Circuit | Auto-recovery |
| Overload | Hiccup mode or constant current limiting, auto-recovery |
| Over Voltage | Shutdown with auto-recovery or re-power |
Input
| Voltage | 85–264VAC / 120–370VDC (some IRM-20 variants: 85–305VAC / 120–430VDC) |
| Frequency | 47–63Hz |
| AC Current (typ.) | 0.5A @ 115VAC · 0.3A @ 230VAC |
| Inrush Current | Cold start, limited by internal circuitry |
| Efficiency (typ.) | ~85% |
Isolation & Construction
| Isolation | I/P–O/P: 3kVAC (Class II, no FG required) |
| Encapsulation | Fully potted / encapsulated module |
| Cooling | Free air convection |
Environment
| Working Temperature | -30 ~ +70°C (derating above +50°C or +60°C) |
| Storage Temperature | -40 ~ +85°C |
| Working Humidity | 20–90% RH non-condensing |
| Cooling | Free air convection |
| Pollution Degree | 2 |
Safety & EMC
| Safety Standards | UL / IEC / EN 62368-1 (confirm marking on unit) |
| Isolation Class | Class II (most configurations) |
| EMC Emission | EN 55032 Class B (typical) |
| EMC Immunity | EN 61000-4 series |
Mechanical
| Dimensions (L×W×H) | Approx. 52.4 × 27.2 × 24 mm |
| Weight | Approx. 60 g |
| Mounting | PCB through-hole pins |
| Housing | Encapsulated module |
| Warranty | 3 Years |
Pin Assignment
| Pin | Function |
|---|---|
| 1 | AC/L |
| 2 | AC/N |
| 3 | DC OUTPUT +V |
| 4 | DC OUTPUT −V |
Verify pin numbering against the unit marking before soldering. Do not reverse AC and DC pins.
Notes
24V / 0.9A / 21.6W. PCB-mount encapsulated module. Input 85–264VAC (confirm exact range on label). Class II construction in most configurations — no FG/PE required for basic operation. Free air convection cooling. Derating above +50°C or +60°C.
Dimensions
IRM-20-24 Dimensions
Compact PCB-mount encapsulated module. All dimensions in mm, tolerance ±1 mm.
Mechanical
| Length (L) | Approx. 52.4 mm |
| Width (W) | Approx. 27.2 mm |
| Height (H) | Approx. 24 mm |
| Weight | Approx. 60 g |
| Housing | Encapsulated module |
Mounting & Clearance
| Mounting | PCB through-hole pins |
| Pin Pitch | Verify against datasheet / unit marking |
| Clearance (sides) | At least 5 mm recommended |
| Clearance (top) | At least 10 mm recommended for convection |
| Soldering | Hand-solder or wave-solder per profile |
Installation
IRM-20-24 Installation
The IRM-20-24 is soldered directly onto a PCB. Correct pin orientation and thermal management are essential.
01 / 06
PCB Through-Hole Soldering
Solder the module pins into the PCB through-hole pads. Confirm pin 1 orientation before soldering. Use a temperature-controlled soldering iron.
02 / 06
Pin Orientation
AC/L, AC/N, +V and −V pins must be correctly identified. Reversing AC and DC pins can destroy the module. Check the unit marking.
03 / 06
Thermal Clearance
Allow free air convection around the module. Do not place tall components directly against the module body. Keep at least 5 mm side clearance and 10 mm top clearance.
04 / 06
No FG/PE Required (Class II)
Most IRM-20-24 configurations are Class II and do not require an FG/PE connection for basic operation. However, the final equipment must still satisfy its own EMC and safety requirements.
05 / 06
Input Fusing
Provide an external fuse or circuit breaker on the AC input side in accordance with the final equipment safety standard. The module does not replace branch-circuit protection.
06 / 06
Derating Above +50°C
Full rated output is available up to approximately +50°C ambient. Above +50°C, derate output power according to the derating curve in the datasheet.
Wiring
IRM-20-24 Wiring & Pin Assignment
Four-pin PCB-mount configuration. Verify pin numbering before soldering.
Pin Assignment
| Pin | Function |
|---|---|
| 1 | AC/L |
| 2 | AC/N |
| 3 | DC OUTPUT +V |
| 4 | DC OUTPUT −V |
Wiring Notes
| AC Input | Connect AC/L and AC/N to the mains supply through an external fuse. |
| DC Output | Connect +V and −V to the on-board load circuit. |
| FG/PE | Not required in Class II configurations; follow final equipment grounding practice. |
| Output Capacitor | Add a low-ESR electrolytic capacitor near the load if long output traces are used. |
Do not reverse AC and DC pins. Provide external input fusing. Keep AC and DC traces separated on the PCB. The module output is isolated, but the final equipment must still be evaluated for creepage, clearance and EMC.
Safety
IRM-20-24 Safety & Cautions
- Qualified technician only. Do not disassemble the encapsulated module.
- Risk of electric shock. Disconnect AC mains before soldering, desoldering or handling the module.
- Do not reverse AC and DC pins — permanent damage may result.
- Provide external input fusing or branch-circuit protection.
- Burn hazard. The module body may be hot during operation.
- Do not exceed 0.9A / 21.6W rated output.
- Class II construction does not remove the need for final equipment EMC and safety evaluation.
- Keep ventilation clearances around the module.
- Component for final equipment; final EMC must be re-confirmed.
Applications
IRM-20-24 Applications
Industrial Control Boards
Sensor Interface Boards
Relay Driver Boards
Instrumentation
Embedded Power Sections
Compact Electronic Devices
Communication Equipment
Test & Measurement
Next Step
Need the IRM-20-24 (PM95)?
Contact DAPPRA Automation — or explore the full IRM Series.
Support
IRM-20-24 FAQ
What is the DAPPRA IRM-20-24 (PM95)?
The IRM-20-24 (internal code PM95) is a 20W PCB-mount AC-DC encapsulated power module delivering 24V DC at 0.9A. It belongs to the DAPPRA IRM Series miniature PCB-mount power module platform, accepts universal 85–264VAC input, and is designed for direct soldering onto a printed circuit board.
What is the input voltage range of the IRM-20-24?
The IRM-20-24 accepts a universal AC input range of 85–264VAC (or 120–370VDC). Some IRM-20 variants are rated 85–305VAC / 120–430VDC; confirm the exact marking on the unit label.
What output voltage and current does the IRM-20-24 provide?
The IRM-20-24 provides 24V DC at 0.9A for a rated output of 21.6W.
Does the IRM-20-24 require a fan?
No. The IRM-20-24 uses free air convection cooling and is fully encapsulated. No fan or external heatsink is required under normal operating conditions.
What is the efficiency of the IRM-20-24?
The IRM-20-24 achieves approximately 85% typical efficiency, depending on input voltage and load conditions.
How is the IRM-20-24 mounted?
The IRM-20-24 is a PCB-mount module with pins designed for through-hole soldering directly onto a printed circuit board. It is not a DIN rail or chassis-mount unit.
What are the dimensions of the IRM-20-24?
The IRM-20-24 measures approximately 52.4 × 27.2 × 24 mm (L × W × H).
What is the operating temperature range of the IRM-20-24?
The IRM-20-24 operates from -30°C to +70°C with derating required above +50°C or +60°C depending on the load and input voltage.
What protections does the IRM-20-24 include?
The IRM-20-24 includes short circuit protection, overload protection and over voltage protection. It also features an isolated Class II construction without a required FG/PE connection in most configurations.
What certifications does the IRM-20-24 have?
The IRM Series is typically certified to UL / IEC / EN 62368-1 and related ITE safety standards. Confirm the specific certification marking on the DAPPRA-labeled unit.
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Overview
IRM-20-24 (PM95) Overview
The DAPPRA IRM-20-24 (internal code PM95) is a 20W PCB-mount AC-DC encapsulated power module delivering 24V DC at 0.9A. It belongs to the IRM Series miniature PCB-mount power module platform, which is designed for direct soldering onto a printed circuit board inside industrial control equipment, instrumentation and compact electronic devices.
The module accepts a universal AC input range of 85–264VAC (or 120–370VDC) and provides a regulated 24V output with approximately 85% typical efficiency. Its fully encapsulated construction and free air convection cooling eliminate the need for a fan or external heatsink, making it suitable for space-constrained PCB assemblies where a conventional enclosed or DIN rail power supply will not fit.
The IRM-20-24 is typically used to derive a 24V control rail directly on a control board, sensor interface board or relay driver board. Short circuit, overload and over voltage protection are built in. The module is Class II construction in most configurations, meaning an FG/PE connection is not required for basic operation, although the final equipment must still satisfy its own EMC and safety requirements.
Key Features
IRM-20-24 Key Features
A 20W PCB-mount 24V power module for direct on-board AC-DC conversion.
- 20W Output · 24V / 0.9A24V DC at 0.9A (21.6W) from a compact encapsulated module.
- Universal AC Input 85–264VACFull-range single-phase input; also 120–370VDC. Some IRM-20 variants accept 85–305VAC.
- PCB-Mount Through-Hole PinsDesigned for direct soldering onto a printed circuit board — no DIN rail or chassis mounting required.
- Fully Encapsulated ConstructionPotting compound protects the module against dust, moisture and mechanical vibration.
- Free Air Convection CoolingNo fan, no external heatsink. Reliable operation inside sealed or semi-sealed enclosures.
- ~85% Typical EfficiencyLow heat dissipation for a 20W-class module.
- Short Circuit / Overload / Over Voltage ProtectionBuilt-in protection functions with auto-recovery where applicable.
- Class II Construction (Most Configurations)No FG/PE terminal required for basic operation; simplifies PCB layout and wiring.
- -30°C to +70°C Operating RangeWith derating above +50°C or +60°C depending on load and input voltage.
- Compact 52.4 × 27.2 × 24 mm FootprintFits into tight PCB assemblies and embedded power sections.
Specifications
IRM-20-24 (PM95) Specifications
Output
| Model | IRM-20-24 (PM95) |
| DC Voltage | 24V |
| Rated Current | 0.9A |
| Current Range | 0–0.9A |
| Rated Power | 21.6W |
| Ripple & Noise (max.) | 200mVp-p |
| Voltage Tolerance | ±2.0% |
| Line Regulation | ±0.5% |
| Load Regulation | ±1.0% |
Protection
| Short Circuit | Auto-recovery |
| Overload | Hiccup mode or constant current limiting, auto-recovery |
| Over Voltage | Shutdown with auto-recovery or re-power |
Input
| Voltage | 85–264VAC / 120–370VDC (some IRM-20 variants: 85–305VAC / 120–430VDC) |
| Frequency | 47–63Hz |
| AC Current (typ.) | 0.5A @ 115VAC · 0.3A @ 230VAC |
| Inrush Current | Cold start, limited by internal circuitry |
| Efficiency (typ.) | ~85% |
Isolation & Construction
| Isolation | I/P–O/P: 3kVAC (Class II, no FG required) |
| Encapsulation | Fully potted / encapsulated module |
| Cooling | Free air convection |
Environment
| Working Temperature | -30 ~ +70°C (derating above +50°C or +60°C) |
| Storage Temperature | -40 ~ +85°C |
| Working Humidity | 20–90% RH non-condensing |
| Cooling | Free air convection |
| Pollution Degree | 2 |
Safety & EMC
| Safety Standards | UL / IEC / EN 62368-1 (confirm marking on unit) |
| Isolation Class | Class II (most configurations) |
| EMC Emission | EN 55032 Class B (typical) |
| EMC Immunity | EN 61000-4 series |
Mechanical
| Dimensions (L×W×H) | Approx. 52.4 × 27.2 × 24 mm |
| Weight | Approx. 60 g |
| Mounting | PCB through-hole pins |
| Housing | Encapsulated module |
| Warranty | 3 Years |
Pin Assignment
| Pin | Function |
|---|---|
| 1 | AC/L |
| 2 | AC/N |
| 3 | DC OUTPUT +V |
| 4 | DC OUTPUT −V |
Verify pin numbering against the unit marking before soldering. Do not reverse AC and DC pins.
Notes
24V / 0.9A / 21.6W. PCB-mount encapsulated module. Input 85–264VAC (confirm exact range on label). Class II construction in most configurations — no FG/PE required for basic operation. Free air convection cooling. Derating above +50°C or +60°C.
Dimensions
IRM-20-24 Dimensions
Compact PCB-mount encapsulated module. All dimensions in mm, tolerance ±1 mm.
Mechanical
| Length (L) | Approx. 52.4 mm |
| Width (W) | Approx. 27.2 mm |
| Height (H) | Approx. 24 mm |
| Weight | Approx. 60 g |
| Housing | Encapsulated module |
Mounting & Clearance
| Mounting | PCB through-hole pins |
| Pin Pitch | Verify against datasheet / unit marking |
| Clearance (sides) | At least 5 mm recommended |
| Clearance (top) | At least 10 mm recommended for convection |
| Soldering | Hand-solder or wave-solder per profile |
Installation
IRM-20-24 Installation
The IRM-20-24 is soldered directly onto a PCB. Correct pin orientation and thermal management are essential.
01 / 06
PCB Through-Hole Soldering
Solder the module pins into the PCB through-hole pads. Confirm pin 1 orientation before soldering. Use a temperature-controlled soldering iron.
02 / 06
Pin Orientation
AC/L, AC/N, +V and −V pins must be correctly identified. Reversing AC and DC pins can destroy the module. Check the unit marking.
03 / 06
Thermal Clearance
Allow free air convection around the module. Do not place tall components directly against the module body. Keep at least 5 mm side clearance and 10 mm top clearance.
04 / 06
No FG/PE Required (Class II)
Most IRM-20-24 configurations are Class II and do not require an FG/PE connection for basic operation. However, the final equipment must still satisfy its own EMC and safety requirements.
05 / 06
Input Fusing
Provide an external fuse or circuit breaker on the AC input side in accordance with the final equipment safety standard. The module does not replace branch-circuit protection.
06 / 06
Derating Above +50°C
Full rated output is available up to approximately +50°C ambient. Above +50°C, derate output power according to the derating curve in the datasheet.
Wiring
IRM-20-24 Wiring & Pin Assignment
Four-pin PCB-mount configuration. Verify pin numbering before soldering.
Pin Assignment
| Pin | Function |
|---|---|
| 1 | AC/L |
| 2 | AC/N |
| 3 | DC OUTPUT +V |
| 4 | DC OUTPUT −V |
Wiring Notes
| AC Input | Connect AC/L and AC/N to the mains supply through an external fuse. |
| DC Output | Connect +V and −V to the on-board load circuit. |
| FG/PE | Not required in Class II configurations; follow final equipment grounding practice. |
| Output Capacitor | Add a low-ESR electrolytic capacitor near the load if long output traces are used. |
Do not reverse AC and DC pins. Provide external input fusing. Keep AC and DC traces separated on the PCB. The module output is isolated, but the final equipment must still be evaluated for creepage, clearance and EMC.
Safety
IRM-20-24 Safety & Cautions
- Qualified technician only. Do not disassemble the encapsulated module.
- Risk of electric shock. Disconnect AC mains before soldering, desoldering or handling the module.
- Do not reverse AC and DC pins — permanent damage may result.
- Provide external input fusing or branch-circuit protection.
- Burn hazard. The module body may be hot during operation.
- Do not exceed 0.9A / 21.6W rated output.
- Class II construction does not remove the need for final equipment EMC and safety evaluation.
- Keep ventilation clearances around the module.
- Component for final equipment; final EMC must be re-confirmed.
Applications
IRM-20-24 Applications
Industrial Control Boards
Sensor Interface Boards
Relay Driver Boards
Instrumentation
Embedded Power Sections
Compact Electronic Devices
Communication Equipment
Test & Measurement
Next Step
Need the IRM-20-24 (PM95)?
Contact DAPPRA Automation — or explore the full IRM Series.
Support
IRM-20-24 FAQ
What is the DAPPRA IRM-20-24 (PM95)?
The IRM-20-24 (internal code PM95) is a 20W PCB-mount AC-DC encapsulated power module delivering 24V DC at 0.9A. It belongs to the DAPPRA IRM Series miniature PCB-mount power module platform, accepts universal 85–264VAC input, and is designed for direct soldering onto a printed circuit board.
What is the input voltage range of the IRM-20-24?
The IRM-20-24 accepts a universal AC input range of 85–264VAC (or 120–370VDC). Some IRM-20 variants are rated 85–305VAC / 120–430VDC; confirm the exact marking on the unit label.
What output voltage and current does the IRM-20-24 provide?
The IRM-20-24 provides 24V DC at 0.9A for a rated output of 21.6W.
Does the IRM-20-24 require a fan?
No. The IRM-20-24 uses free air convection cooling and is fully encapsulated. No fan or external heatsink is required under normal operating conditions.
What is the efficiency of the IRM-20-24?
The IRM-20-24 achieves approximately 85% typical efficiency, depending on input voltage and load conditions.
How is the IRM-20-24 mounted?
The IRM-20-24 is a PCB-mount module with pins designed for through-hole soldering directly onto a printed circuit board. It is not a DIN rail or chassis-mount unit.
What are the dimensions of the IRM-20-24?
The IRM-20-24 measures approximately 52.4 × 27.2 × 24 mm (L × W × H).
What is the operating temperature range of the IRM-20-24?
The IRM-20-24 operates from -30°C to +70°C with derating required above +50°C or +60°C depending on the load and input voltage.
What protections does the IRM-20-24 include?
The IRM-20-24 includes short circuit protection, overload protection and over voltage protection. It also features an isolated Class II construction without a required FG/PE connection in most configurations.
What certifications does the IRM-20-24 have?
The IRM Series is typically certified to UL / IEC / EN 62368-1 and related ITE safety standards. Confirm the specific certification marking on the DAPPRA-labeled unit.
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