MEAN WELL IRM-90-15ST is an encapsulated industrial AC/DC power module with screw-terminal mounting, 15 V output, 5.67 A continuous rated current and 85.05 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-90 Datasheet (PDF)
The IRM-90 section is on PDF pages 37, 38, 39, 40. Refer to the complete mechanical drawings and notes when planning installation.
Model Code and Construction
| Complete model |
IRM-90-15ST |
| Series |
IRM-90 industrial AC/DC power module. |
| Output code |
15 V nominal DC output. |
| Mounting suffix |
ST means screw-terminal 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 |
15 V. |
| Continuous rated current |
5.67 A. |
| Catalogue-rated output power |
85.05 W. |
| Peak current / peak power |
6.23 A / 93.5 W for up to 10 seconds. |
| Ripple and noise, maximum |
150 mVp-p. |
| Voltage tolerance |
±2.0%; includes setup tolerance, line regulation and load regulation. |
| Line regulation |
±0.5%. |
| Load regulation |
±0.5%. |
| Efficiency, typical |
92.5%. |
Peak operation is limited to a maximum 33% duty cycle within every 30 seconds, and average output power must not exceed the continuous rated power. Apply both current and power limits together; the 10-second allowance does not remove either restriction.
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 |
80–305 VAC or 113–431 VDC. |
| AC frequency |
47–63 Hz. |
| AC current, typical |
1.9 A at 115 VAC; 1.1 A at 230 VAC. |
| Cold-start inrush, typical |
30 A at 115 VAC; 65 A at 230 VAC. |
| Setup / rise time |
1000 ms / 30 ms at 230 VAC; 1000 ms / 30 ms at 115 VAC, full load. |
| Hold-up time, typical |
30 ms at 230 VAC; 10 ms at 115 VAC, full load. |
| No-load power consumption |
Less than 0.3 W. |
| Leakage current |
Less than 0.25 mA at 240 VAC; measured from primary input to DC output. |
| Block-diagram switching frequency |
70 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 |
15.8–20.3 V. |
| Overvoltage action |
Output shuts down; re-power on to recover. |
| Overtemperature protection |
Output shuts down; re-power on to recover. |
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; the 230 VAC curve extends through 55°C. Both reduce to 50% at 70°C, 25% at 80°C and 5% at 85°C. Follow the separate curves between their full-load knees and 70°C. |
| Input/load limits |
At 60 Hz: 80% load at 80 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. |
| Temperature coefficient |
±0.03%/°C over 0–50°C. |
| Vibration for this version |
5 G, 10–500 Hz, 10 minutes per cycle; 60 minutes each along X, Y and Z. |
| Altitude and overvoltage-category scope |
The feature page lists operation up to 4,000 m with Note 7 derating. The EN62368-1 OVC III statement is limited to 2,000 m; it does not establish OVC III approval at 4,000 m. |
| High-altitude temperature derating |
Above 2,000 m (6,500 ft), reduce allowable ambient temperature by 3.5°C per additional 1,000 m for this fanless model. |
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 |
109 × 52 × 33.5 mm. |
| Mechanical drawing tolerance |
±1 mm, unless an individual dimension is separately toleranced. |
| Input terminal layout |
As drawn in top view, AC/N is on the left and AC/L on the right. Input terminal pitch is 7.5 mm. |
| Output terminal layout |
As drawn, the four terminals are −V, −V, +V, +V from left to right; adjacent pitch 5 mm. These are duplicated connections to one output, not four outputs. |
| Mounting geometry |
Four Ø3.5 mm mounting holes; drawing centre distances 33 × 98 mm. The side drawing marks 6.7 mm at the mounting flange. |
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 kVAC. |
| Input-to-output insulation resistance |
100 MΩ at 500 VDC, 25°C and 70% RH. |
| Listed safety approvals |
IEC62368-1; IEC60335-1; Dekra BS EN/EN60335-1 and BS EN/EN62368-1; UL62368-1; TUV BS EN/EN62368-1; EAC TP TC004. |
| Overvoltage category |
OVC III according to EN62368-1, within the stated altitude limit of 2,000 m. |
| Conducted and radiated emissions |
BS EN/EN55032 (CISPR32) and BS EN/EN55014-1: 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; BS EN/EN55014-2 also listed. |
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 |
219 g, from the explicit 0.219 kg per-unit PACKING entry for this mounting version; not a measured net or shipping weight. |
| Carton reference |
50 pieces / 12 kg / 0.56 CUFT; not used to calculate unit weight. |
| Minimum MTBF estimates |
5088.4 thousand hours by Telcordia SR-332 (Bellcore); 609.9 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-90-SPEC, 2025-11-12; combined PDF pages 37–40. |
MTBF is a statistical reliability estimate, not a guaranteed service life.
