MEAN WELL MFM-15-24 is a compact on-board medical AC/DC power supply with 24 V output, 0.63 A rated current and 15.1 W catalogue-rated output power. Class II construction and primary-secondary 2 MOPP isolation support integration into suitable medical equipment. Peak operation and BF applications require the conditions below.
Product Datasheet
Download MEAN WELL MFM-15 Datasheet (PDF)
The MFM-15 section is on PDF pages 9, 10, 11, 12. Refer to the complete mechanical drawings and notes when planning installation.
Model Code and Application
| Complete model |
MFM-15-24 |
| Series |
MFM-15 on-board medical AC/DC power supply. |
| Output code |
24 V nominal DC output. |
| Construction |
Open-board format; Class II, double insulation, without FG. |
| Medical insulation |
Primary-to-secondary isolation: 2 × MOPP. |
Suitable for BF applications with appropriate system consideration. The power module alone does not certify the completed equipment as a BF medical device. Typical applications include portable medical devices, mobile clinical workstations, medical computer monitors and medical examination instruments.
DC Output and Peak Loading
| Nominal DC voltage |
24 V. |
| Rated output current |
0.63 A. |
| Current range |
0–0.63 A; no minimum load required. |
| Catalogue-rated output power |
15.1 W. |
| Peak current / peak output power |
0.69 A / 16.6 W, for up to 10 seconds subject to the limits below. |
| Ripple and noise, maximum |
180 mVp-p. |
| Voltage tolerance |
±2.0%; includes setup tolerance, line regulation and load regulation. |
| Line regulation |
±0.3%. |
| Load regulation |
±0.5%. |
| Efficiency, typical |
86.5%. |
Peak operation is limited to a maximum 33% duty cycle within every 30 seconds. Average output power must not exceed the rated power. The 10-second peak limit does not remove either restriction; observe the model-specific current and power limits together.
Ripple and noise are measured at 20 MHz bandwidth using a 12-inch twisted pair terminated with 0.1 µF and 47 µF capacitors in parallel. Power and current figures retain the catalogue’s printed precision.
Input and Timing
| Input voltage |
80–264 VAC or 113–370 VDC; apply low-input derating. |
| AC frequency |
47–440 Hz. |
| AC current, typical |
0.6 A at 115 VAC; 0.3 A at 230 VAC. |
| Cold-start inrush, typical |
20 A at 115 VAC; 45 A at 230 VAC. |
| Setup / rise time |
1500 ms / 30 ms at both 230 VAC and 115 VAC, full load. |
| Hold-up time, typical |
40 ms at 230 VAC; 10 ms at 115 VAC, full load. |
| No-load consumption |
Less than 0.1 W. |
| Touch current |
Less than 80 µA at 264 VAC, measured from the primary input to the DC output. |
| Switching frequency reference |
100 kHz in the block diagram. |
Unless otherwise specified, 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 protection operates at 110–150% of rated output power; hiccup mode, automatic recovery after the fault is removed. |
| Overvoltage threshold |
27.6–32.4 V. |
| Overvoltage response |
Output voltage shuts off and is clamped by a zener diode. |
| Overtemperature response |
Output shuts down and recovers automatically after temperature falls. |
Protection thresholds are not continuous-output ratings or additional peak-load allowances.
Cooling and Environmental Limits
| Operating temperature |
−35 to +85°C, subject to the model-specific derating curve. |
| Cooling / curve orientation |
Fanless operation; horizontal mounting for the published ambient-temperature curve. |
| Temperature/load curve for this output |
-35°C: 100%; 55°C: 100%; 60°C: 85%; 70°C: 50%; 80°C: 30%; 85°C: 25%. |
| Curve group |
12V–24V output versions. |
| Input-voltage derating |
At 60 Hz: 80% load at 80 VAC, rising to 100% at 100 VAC; 100% from 100 to 264 VAC. |
| Working humidity |
20–90% RH, non-condensing. |
| Storage |
−40 to +85°C; 10–95% RH, non-condensing. |
| Temperature coefficient |
±0.03%/°C over 0–55°C. |
| Vibration |
5 G, 10–500 Hz, 10 minutes per cycle; 60 minutes each along X, Y and Z. |
| Operating altitude |
Up to 5,000 m. |
| Altitude derating |
Above 2,000 m (6,500 ft), reduce the allowable ambient temperature by 3.5°C per additional 1,000 m for this fanless model. |
Use the full published curves for intermediate conditions and apply the input, temperature, altitude and peak-load limits together. The upper operating temperature is not a full-load rating.
Dimensions, PCB Connections and Installation
| Catalogue dimensions, L × W × H |
49 × 23.8 × 23 mm. |
| Drawing tolerance |
±0.5 mm; follow the labelled mechanical drawing for all dimension reference points. |
| Input connections, top view |
With the input side at the left as illustrated: upper connection AC/L; lower connection AC/N. |
| Output connections, top view |
At the right as illustrated: upper connection +V; lower connection −V. |
| Input connection positions |
20.75 mm vertical spacing; the input connection column is 1.75 mm from the left edge. Top and bottom offsets are marked 1.55 mm and 1.5 mm. |
| Output connection positions |
8 mm vertical spacing; the output connection column is 2.25 mm from the right edge, with the lower connection 1.5 mm from the lower edge. |
| Side-view connection dimensions |
The drawing marks 1.8 mm and 1.05 mm at the pin profile, and separate 4.5 mm and 3.5 mm vertical callouts. Use their exact reference positions in the drawing for PCB layout. |
| Soldering limits |
Wave soldering: 265°C for 5 seconds maximum. Manual soldering: 390°C for 3 seconds maximum. |
These are top-view connection locations; do not mirror them as a bottom view. Use the complete mechanical drawing and the manufacturer installation instructions for the PCB footprint and installation clearances.
The assigned catalogue pages give no complete order code for a mating connector, accessory kit, mounting bracket or separately supplied fuse. FS1 is a drawing reference, not an accessory ordering code; no unlisted kit or terminal tightening torque is implied.
Safety and EMC
| Medical safety approvals |
IEC60601-1:2005+A1; TUV BS EN/EN60601-1:2006+A1+A12+A2; ANSI/AAMI ES60601-1:2005/A2:2021; CAN/CSA C22.2 No.60601-1:2014+A2. |
| Other listed approvals |
IEC60335-1:2010/AMD2:2016; Dekra BS EN/EN60335-1:2012+A11+A13+A1+A14+A2+A15; EAC TP TC004. |
| Withstand voltage |
Input to output: 4 kVAC. |
| Insulation resistance |
Input to output: 100 MΩ at 500 VDC, 25°C and 70% RH. |
| Emissions |
BS EN/EN55011 (CISPR11): Class B conducted and radiated emissions, for Class II configuration. BS EN/EN61000-3-2: Class A harmonic current. BS EN/EN61000-3-3: voltage flicker. |
| Immunity framework |
BS EN/EN55035 and BS EN/EN60601-1-2. |
ESD, BS EN/EN61000-4-2: Level 4, 15 kV air and 8 kV contact. RF field, -4-3: Level 3, 10 V/m at 80 MHz–2.7 GHz; Table 9 levels 9–28 V/m at 385 MHz–5.78 GHz. EFT/burst, -4-4: Level 3, 2 kV. Surge, -4-5: Level 3, 1 kV line-to-line. Conducted susceptibility, -4-6: Level 3, 10 V. Magnetic immunity, -4-8: Level 4, 30 A/m.
Voltage dips and interruptions, BS EN/EN61000-4-11: 100% dip for 1 period, 30% dip for 25 periods, and 100% interruption for 250 periods.
The power supply is a component for installation in final equipment. Reconfirm the completed equipment’s EMC compliance and medical-system suitability; component approvals do not establish all protection measures of the assembled equipment.
Weight, Reliability and Catalogue Notes
| Catalogue unit-weight reference |
28 g, converted from the explicit 0.028 kg per-unit PACKING entry. This is not a measured shipping or net weight. |
| Packing reference |
200 pieces / 6.6 kg / 0.94 CUFT; not used to calculate unit weight. |
| Minimum MTBF estimates |
7319.8 thousand hours by Telcordia SR-332 (Bellcore); 1210.1 thousand hours by MIL-HDBK-217F at 25°C. |
| Manufacturer warranty statement |
The catalogue lists a three-year warranty; manufacturer terms apply. |
| Specification revision |
MFM-15-SPEC, 2024-10-30; combined catalogue pages 9–12. |
MTBF is a statistical reliability estimate, not a guaranteed service life.
