MEAN WELL RPS-45-48 is an open-frame medical AC/DC power supply rated at 48 V, 0.94 A and 45.1 W. Its 3 × 2-inch PCB format uses free-air convection cooling and Class II system construction without FG. Primary-to-secondary insulation is specified as 2 × MOPP; BF use requires appropriate consideration of the complete medical system. Continuous and short-duration output limits are given separately below.
Product Datasheet
Download MEAN WELL RPS-45 Datasheet (PDF)
The RPS-45 section is on PDF pages 5, 6, 7, 8. Refer to the complete mechanical drawings and notes when planning installation.
Model and Product Configuration
Exact model
RPS-45-48.
Product type
Open-frame, PCB-type medical AC/DC power supply with a single DC output and free-air convection cooling.
System protection class
Class II, no FG.
Typical integration applications
Medical computer monitors, oral irrigators, hemodialysis machines and sleep-apnea equipment, subject to the finished system’s safety assessment.
Select by the complete model and the actual ratings below. The series number does not replace the model-specific continuous power rating.
Model-Specific DC Output
DC output voltage
48 V.
Rated current
0.94 A.
Printed current range
0–1.03 A; the part above rated current is subject to the short-duration peak rating.
Rated output power
45.1 W, as printed for this exact model.
Peak load
49.4 W for 10 seconds maximum, subject to the conditions below.
Ripple and noise, maximum
120 mVp-p.
Output-voltage adjustment
45.6–52.8 V.
Voltage tolerance
±1.0%; includes set-up tolerance, line regulation and load regulation.
Line regulation
±0.5%.
Load regulation
±1.0%.
Efficiency, typical
91%.
The printed peak-load rating is 49.4 W for no more than 10 seconds. It is not a continuous rating. Peak duty cycle must not exceed 33% within every 30 seconds, and average output power must not exceed this model’s rated power. These limits apply together.
Unless stated otherwise, parameters are measured at 230 VAC, rated load and 25°C ambient. Preserve the printed power and current limits together rather than increasing either limit through rounding.
Ripple and noise are measured at 20 MHz bandwidth using a 12-inch twisted pair terminated with parallel 0.1 µF and 47 µF capacitors.
Input, Timing and Leakage
Input range
80–264 VAC; the assigned specification lists no DC input range. Apply the input-voltage derating curve.
AC frequency
47–63 Hz.
Input current, typical
1.2 A at 115 VAC; 1 A at 230 VAC.
Cold-start inrush, typical
30 A at 115 VAC; 60 A at 230 VAC.
No-load power consumption
Less than 0.1 W.
Set-up and rise time
500 ms set-up and 30 ms rise at both 230 VAC and 115 VAC, full load.
Hold-up time, typical
30 ms at 230 VAC; 16 ms at 115 VAC, full load.
Leakage current
touch current less than 100 µA at 264 VAC. Touch current is measured from primary input to DC output.
Block-diagram frequency
65 kHz switching-frequency reference.
Protection
Short circuit and overload
Short-circuit protection is listed. Overload threshold: 115–150% of rated output power; hiccup mode recovers automatically after the fault is removed.
Overvoltage threshold
55.2–64.8 V.
Overvoltage recovery
Output voltage shuts down; re-power on to recover.
Protection thresholds are not extra continuous-output allowances. Apply the model-specific continuous and peak limits as well as temperature and input-voltage derating.
Cooling, Derating and Environment
Cooling and working ambient
Free-air convection; −30 to +70°C with derating.
Horizontal temperature/load curve
100% load from −30 to +50°C, reducing to 50% at +70°C.
Input-voltage/load curve, 60 Hz
70% load at 80 VAC, rising to 100% at 115 VAC; 100% plateau through 264 VAC.
Humidity and storage
Working: 20–90% RH, non-condensing. Storage: −40 to +85°C and 10–95% RH, non-condensing.
Temperature coefficient
±0.03%/°C over 0–50°C.
Vibration
10–500 Hz, 2 G, 10 minutes per cycle; 60 minutes each along X, Y and Z.
Operating altitude
4000 m maximum. Above 2,000 m, reduce the allowable ambient temperature by 3.5°C per additional 1,000 m for this fanless supply.
Apply temperature and input-voltage limits together. Use the complete plotted curves for intermediate conditions; the upper operating temperature is a derated point, not a full-power rating.
Dimensions, Installation and Connectors
Dimensions, L × W × H
76.2 × 50.8 × 24 mm.
PCB footprint and mounting holes
3 × 2 inches; four Ø3.2 mm holes on a 69.85 × 44.45 mm centre pattern, with 3.175 mm edge offsets.
Drawing orientation and clearance
Top-view connector numbering; dimensions in millimetres, general tolerance ±1 mm unless noted. The side view separately marks underside projections of 3 mm maximum; allow clearance according to the complete drawing.
AC input connector CN1
JST B3P-VH or equivalent. Pin 1: AC/N; pin 2: no pin; pin 3: AC/L.
DC output connector CN2
JST B4P-VH or equivalent. Pin 1: +V; Pin 2: +V; Pin 3: −V; Pin 4: −V.
Mating connector references
Housing: JST VHR or equivalent, as printed. Terminal: JST SVH-21T-P1.1 or equivalent. The VHR reference is a series name; select the exact housing position count and compatible terminal for CN1 or CN2.
Board component references
FS1: T2A/250V. SVR1 is the output-voltage adjustment reference. The drawing also identifies the power-on LED.
Protection-class configuration
Class II system configuration with no FG connection on the listed input connector.
The connector, housing and terminal references identify interface parts for selection; the catalogue does not state that loose mating housings, terminals, cables or mounting hardware are included. Select the compatible position count and wiring arrangement without inventing unprinted ordering suffixes. The duplicated +V or −V pins, where present, belong to the same single output. Use the complete mechanical drawing and installation instructions.
Safety and EMC
Medical safety standards listed as approved
IEC60601-1:2005+A1+A2; TUV BS EN/EN60601-1:2006+A1+A12+A2; ANSI/AAMI ES60601-1:2005+A2; CAN/CSA C22.2 No.60601-1:2014+A2; EAC TP TC004.
Isolation and BF application
Primary-to-secondary isolation: 2 × MOPP. Suitable for BF applications with appropriate system consideration; this component does not by itself establish BF compliance of the complete medical equipment.
Withstand voltage
Input-to-output: 4 kVAC.
Insulation resistance
Input-output: 100 MΩ at 500 VDC, 25°C and 70% RH.
By-request design reference
BS EN/EN60335-1 is a design reference available by request, not an unconditional additional approval for every supplied unit.
Emissions and system configuration
BS EN/EN55011 (CISPR11) conducted and radiated emissions: Class B in Class II configuration. Harmonic current: BS EN/EN61000-3-2 Class A; voltage flicker: BS EN/EN61000-3-3.
Immunity is specified to BS EN/EN55035 and BS EN/EN60601-1-2. BS EN/EN61000-4-2 ESD: level 4, 15 kV air and 8 kV contact; -4-3 RF: level 3, 10 V/m over 80 MHz–2.7 GHz, plus Table 9 fields of 9–28 V/m over 385 MHz–5.78 GHz.
BS EN/EN61000-4-4 EFT: level 3, 2 kV; -4-5 surge: level 4, 2 kV line-to-line; -4-6 conducted susceptibility: level 3, 10 V; -4-8 magnetic immunity: level 4, 30 A/m. BS EN/EN61000-4-11: 100% dip for 1 period, 30% dip for 25 periods and 100% interruption for 250 periods.
The catalogue EMC tests used the unit mounted on a 360 × 360 mm metal plate, 1 mm thick. Confirm EMC compliance again in the final assembled equipment.
Weight, Reliability and Catalogue
Single-unit catalogue weight
110 g (0.11 kg), explicitly stated in PACKING; this is a catalogue unit reference, not a measured shipping-parcel weight.
Packing reference
120 pieces / 14.2 kg / 0.94 CUFT.
Minimum MTBF estimates
3334.3 thousand hours by Telcordia SR-332 (Bellcore); 726.2 thousand hours by MIL-HDBK-217F at 25°C.
Warranty and applicable version
3-year manufacturer warranty, subject to applicable terms. RPS-45-SPEC dated 2024-11-22; combined PDF pages 5–8.
Catalogue lifetime feature
The feature page states a lifetime above 50,000 hours. This is not an unconditional service-life guarantee for every load, temperature or installation.
MTBF is a statistical reliability estimate, not a guaranteed service life.
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