MEAN WELL MPM-90-48ST is a screw-terminal medical AC/DC power module delivering 48 V DC at 1.88 A (90.2 W) by convection, with a conditional 2.07 A / 99.2 W peak rating for up to 10 seconds. It accepts 80–264 V AC or 113–370 V DC and provides Class II insulation with 2 × MOPP; BF application suitability depends on the completed system.
Product Datasheet
Download MEAN WELL MPM-90 Datasheet (PDF)
The MPM-90 section is on PDF pages 29, 30, 31, 32. Refer to the complete mechanical drawings and notes when planning installation.
Model and mounting
| Complete model |
MPM-90-48ST |
| Product type |
Isolated AC/DC medical power module, single 48 V DC output |
| Mounting configuration |
ST suffix: screw-terminal mounting version. |
| Model code |
MPM identifies the series; 90 identifies the family; 48 identifies nominal output voltage. Use the actual continuous and peak ratings below. |
Output and peak load
| Nominal DC output |
48 V |
| Continuous convection rating |
1.88 A; 90.2 W |
| Peak rating |
2.07 A; 99.2 W, for up to 10 seconds under the duty and average-power limits. |
| Ripple and noise, maximum |
240 mV peak-to-peak |
| Voltage tolerance |
±2.0%, including set-up tolerance, line regulation and load regulation. |
| Line / load regulation |
±0.5% / ±0.5% |
| Minimum load |
No minimum load required. |
Peak operation is limited to a maximum 33% duty cycle within every 30-second interval, and average output power must not exceed the continuous rated power. The peak duration, duty cycle, average power and thermal/input derating conditions all apply together.
Ripple and noise are measured with a 20 MHz bandwidth using a 12-inch twisted pair terminated with 0.1 µF and 47 µF capacitors in parallel. Unless separately stated, catalogue parameters use 230 V AC input, rated load and 25°C ambient.
Input, efficiency and timing
| Input range |
80–264 V AC or 113–370 V DC; output derating applies at low input. |
| AC frequency |
47–63 Hz |
| Typical efficiency |
93% at the catalogue reference conditions. |
| Typical AC current |
1.9 A at 115 V AC; 1.1 A at 230 V AC. |
| Typical cold-start inrush |
30 A at 115 V AC; 65 A at 230 V AC. |
| Set-up / rise time |
1000 ms / 30 ms at 230 V AC or 115 V AC, full load. |
| Typical hold-up time |
30 ms at 230 V AC; 10 ms at 115 V AC, full load. |
| No-load input power |
Less than 0.1 W. |
The 60 Hz input-voltage curve on PDF page 31 permits 80% load at 80 V AC, rising to 100% at 100 V AC and remaining at 100% through 264 V AC. Apply this together with the ambient-temperature curve. The block diagram identifies a 70 kHz switching frequency.
Protection
| Short circuit / overload |
Overload threshold: 115–160% of rated output power. Hiccup protection recovers automatically after the fault is removed. |
| Overvoltage |
50.4–64.8 V; output shuts down. Re-power the unit to recover. |
| Overtemperature |
Output shuts down; re-power the unit to recover. |
Temperature, cooling and altitude
| Working ambient range |
-30 to +80°C, subject to the applicable load derating curve. |
| Storage temperature |
-40 to +85°C. |
| Working humidity |
20–90% RH, non-condensing. |
| Temperature coefficient |
±0.03%/°C over 0–50°C. |
| Maximum operating altitude / overvoltage category |
4000 m / OVC II. |
The horizontal-mounting curve allows 100% load from -30°C to 50°C at 100 V AC, or to 55°C at 230 V AC. Follow the respective sloping curve above those temperatures; both show 50% load at 70°C and 25% at 80°C.
Above 2000 m, reduce the allowable ambient temperature by 3.5°C per additional 1000 m for this convection-cooled module. A generic 5°C/1000 m note for fan-equipped models does not identify a fan in this version. The upper ambient limit is not a full-load rating.
Medical isolation and integration
| Insulation class |
Class II, double insulation; no functional-ground terminal. |
| Primary-to-secondary protection |
2 × MOPP (means of patient protection). |
| Input-to-output withstand voltage |
4 kV AC. |
| Input-to-output insulation resistance |
100 MΩ at 500 V DC, 25°C and 70% RH. |
| Maximum touch current |
Less than 100 µA at 264 V AC, measured from primary input to DC output. |
Suitable for BF (body-floating, patient-contact) applications only with appropriate system consideration. The module is a component, so the completed medical equipment and its applied-part isolation must be assessed as a system.
The specification lists IEC 60601-1:2005+A1; TUV BS EN/EN 60601-1:2006+A1+A12+A2; ANSI/AAMI ES60601-1:2005+A2; CAN/CSA C22.2 No. 60601-1:2014+A2; and EAC TP TC 004 approvals. Design reference to BS EN/EN 60335-1 is by request and is not a blanket approval for every delivered unit.
Catalogue application examples include portable medical devices, mobile clinical workstations, medical computer monitors and medical examination instruments.
EMC
| Conducted and radiated emissions |
BS EN/EN 55011 (CISPR 11), Class B; the family feature states Class B without additional components. |
| Harmonic current |
BS EN/EN 61000-3-2, Class A. |
| Voltage flicker |
BS EN/EN 61000-3-3 is listed; no separate class or level is stated. |
| Immunity standards |
BS EN/EN 55035 and BS EN/EN 60601-1-2. |
Immunity test entries: BS EN/EN 61000-4-2, ESD Level 4, 15 kV air and 8 kV contact; 61000-4-3, RF Level 3, 10 V/m from 80 MHz to 2.7 GHz, plus Table 9 fields of 9–28 V/m from 385 MHz to 5.78 GHz; 61000-4-4, EFT Level 3, 2 kV; 61000-4-5, surge Level 3, 1 kV line-to-line; 61000-4-6, conducted Level 3, 10 V; and 61000-4-8, magnetic field Level 4, 30 A/m.
The BS EN/EN 61000-4-11 entries are greater than 95% dip for 0.5 periods, 30% dip for 25 periods, and greater than 95% interruption for 250 periods. These component test entries do not replace final-equipment EMC verification.
Dimensions, terminals and installation
| Overall dimensions, L × W × H |
109 × 52 × 33.5 mm |
| Catalogue case / general tolerance |
IRM60 / ±1 mm unless otherwise marked. |
| Connection method |
Screw terminals marked AC/N, AC/L, −Vo and +Vo. |
| Vibration |
10–500 Hz, 5 G; 10 minutes per cycle, 60 minutes along each X, Y and Z axis. |
The top-view drawing on PDF page 32 labels the input terminals AC/N then AC/L from left to right. The output bank is −Vo, −Vo, +Vo, +Vo from left to right. Input terminal pitch is 7.5 mm and output pitch is 5 mm. Four 3.5 mm diameter mounting holes form the dimensioned 33 × 98 mm pattern. Overall height is 33.5 mm; the separate 6.7 mm side-view dimension is a drawing reference, not an additional overall height.
Use the model-specific installation drawing and the manufacturer installation instructions referenced in the PDF. The catalogue does not specify a separate mating-connector, bracket or wiring-kit order code for this version; it also does not give terminal torque or wire-gauge values. Select installation hardware for the actual mounting and electrical conditions.
Reference mass and reliability
| Catalogue packing reference per unit |
219 g, from the explicit unit value in the PACKING entry on PDF page 30. This is not a measured net weight or shipping-package weight. |
| MTBF, catalogue minimum estimates |
4548.9 thousand hours, Telcordia SR-332 (Bellcore); 570.5 thousand hours, MIL-HDBK-217F at 25°C. |
| Manufacturer datasheet warranty |
3 years. |
