MEAN WELL MSP-100 series: Single-Output Medical Power Supply with PFC - MSP-100-3.3

Description

MEAN WELL MSP-100-3.3 is a single-output medical-type power supply rated at 3.3 V DC, 20 A and 66 W. The 38 mm low-profile enclosure uses free-air convection. Universal AC input, active PFC and remote ON/OFF are provided. Over-temperature protection is an optional configuration on MSP-100, not an assumed feature of every unit. Medical isolation levels and leakage test conditions are specified below; final-equipment suitability requires integration assessment.

Product Datasheet

Download MEAN WELL MSP-100 Datasheet (PDF)

The MSP-100 section is on PDF pages 1, 2. Refer to the complete mechanical drawings and notes when planning installation.

Model and Output

Complete model / catalogue MSP-100-3.3; MSP-100 revision 2025-03-17. The final code identifies the nominal 3.3 V output.
Rated DC output 3.3 V / 20 A / 66 W. Current range at nominal voltage: 0–20 A.
Voltage adjustment 3.1–3.8 V using SVR1. Observe rated current and power when adjusting voltage.
Ripple and noise 80 mVp-p maximum; 20 MHz bandwidth, a 12-inch twisted pair terminated by parallel 0.1 µF and 47 µF capacitors.
Voltage tolerance +2.5 / −3.5%; includes setup tolerance, line regulation and load regulation.
Line / load regulation ±0.5% / ±2.0%, respectively.
Typical efficiency 78%, under the default 230 VAC, rated-load and 25°C test conditions.

The 100 series designation is not a promise of that wattage at every output voltage. Use this model’s 66 W rating together with its current limit and both derating curves.

Input, Timing and Low-load Consumption

Input / frequency 85–264 VAC or 120–370 VDC; 47–63 Hz AC. Full-range input with built-in active PFC.
Typical power factor >0.95 at 230 VAC and >0.98 at 115 VAC, at full load.
Typical AC input current 1.2 A at 115 VAC; 0.6 A at 230 VAC.
Typical inrush current 35 A at 115 VAC; 65 A at 230 VAC. The block diagram includes active inrush-current limiting.
Short-duration input withstand 300 VAC surge input for 5 seconds, as the feature list states. This does not extend the continuous 264 VAC input limit.
Setup / rise at full load 230 VAC: 2500 / 100 ms; 115 VAC: 2500 / 100 ms.
Typical hold-up at full load 50 ms at 230 VAC; 20 ms at 115 VAC.
No-load input power <0.5 W, as stated in the MSP-100 feature list.

Unless otherwise stated, specifications are measured at 230 VAC input, rated load and 25°C ambient.

Protection

Short circuit / overload Short-circuit and overload protection; threshold 105–135% of rated output power. Constant-current limiting for output voltage at 50–100% of nominal, with automatic recovery after the fault is removed.
Over-voltage 3.96–4.62 V; output shutdown, with re-powering required to recover.
Over-temperature Optional on MSP-100. When this protection is fitted, the specified action is output shutdown with automatic recovery after temperature decreases. Confirm the required configuration when ordering.

Protection thresholds are fault-response limits, not continuous or peak-output ratings.

Remote Control and Power Connections

Remote ON/OFF logic Across RC+ and RC−: 0–0.8 VDC = ON; 4–10 VDC = OFF. CN100 pin 1 is RC− and pin 2 is RC+.
AC / earth terminals Terminal 1: AC/L; terminal 2: AC/N; terminal 3: FG protective earth.
DC output terminals Terminals 4–5: −V; terminals 6–7: +V. Use the numbered mechanical drawing for polarity.
CN100 signals 1 RC−; 2 RC+. These control pins are distinct from the AC and DC power terminals.

Use the remote-control logic specified for this family; it must not be inferred from another MSP series.

Cooling, Derating and Environment

Cooling Free-air convection; keep ventilation openings unobstructed. The specified curves are for horizontal mounting.
Working temperature / thermal load −40°C to +60°C, subject to derating. The horizontal curve shows 100% load through +40°C, then falls to 50% at +60°C.
Input-voltage load curve At 60 Hz, the graph rises from 80% load at 85 VAC to its full-load plateau at 100 VAC, continuing to 264 VAC. Apply this percentage to the model’s own output rating.
Altitude derating For this fanless model, reduce allowable ambient temperature by 3.5°C per additional 1000 m above 2000 m. This adjustment is not an independently specified maximum operating altitude.
Humidity / storage Working: 20–90% RH, non-condensing. Storage: −40°C to +85°C, 10–95% RH.
Temperature coefficient ±0.04%/°C over 0–50°C.
Vibration 10–500 Hz, 5G; 10 minutes per cycle, 60 minutes along each X, Y and Z axis.

Input and ambient derating apply together. The maximum working temperature is not a full-load guarantee.

Medical Isolation, Leakage and EMC

Listed medical safety standards IEC 60601-1:2005+A1+A2; ANSI/AAMI ES60601-1:2005+A2; CAN/CSA C22.2 No.60601-1:2014+A2; EAC TP TC004 approved, as listed in this catalogue.
Isolation levels Primary to secondary: 2×MOOP; primary to earth: 1×MOOP; secondary to earth: 1×MOOP.
Leakage-current limits Earth leakage <300 µA at 264 VAC; touch leakage <100 µA at 264 VAC. Touch current is measured from primary input to DC output.
Withstand voltage Input–output: 4 kVAC; input–FG: 2 kVAC; output–FG: 0.5 kVAC.
Insulation resistance 100 MΩ at 500 VDC, 25°C and 70% RH, for input–output, input–FG and output–FG.
Other design references BS EN/EN60335-1 and BS EN/EN62368-1 are design references by request; they are distinct from the listed medical approvals.
EMC emissions BS EN/EN55011 (CISPR11) Class B; BS EN/EN61000-3-2 and -3; EAC TP TC020.
EMC immunity BS EN/EN61000-4-2, -3, -4, -5, -6, -8, -11; BS EN/EN55035; BS EN/EN60601-1-2; EAC TP TC020.

These MOOP and leakage statements describe the supply under the stated tests; they do not establish MOPP, a patient-applied-part classification, or compliance of a complete medical device.

The manufacturer’s EMC tests mount the unit on a 360 × 360 mm metal plate, 1 mm thick. As this supply is a component of final equipment, reconfirm EMC compliance after integration.

At input below 40 VAC, performance can degrade; the final-equipment manufacturer must verify that this abnormal-input behavior does not affect basic safety or essential performance. This note does not extend the rated 85 VAC operating range.

Mechanical Installation, Connectors and Weight

Body dimensions / case 159 × 97 × 38 mm (L × W × H), general tolerance ±1 mm; case drawing 901I. The 38 mm height is the low-profile / 1U feature stated by the manufacturer.
Terminal projection The mechanical drawing marks a terminal projection of 10 mm maximum beyond the body; allow this additional connection clearance.
Mounting-hole callouts 2-M3 L=4; 6-M3 (Both Sides) L=6. The L values are drawing thread-length labels in mm. They do not identify an included screw kit.
Adjustment / indicator SVR1 and CN100 are located in the mechanical drawing.
Control connector as printed CN100: JST B-XH or equivalent. Mating housing: JST XHP or equivalent. Contact: JST SXH-001T or equivalent.
Connector selection Header and mating-housing names are printed prefixes; do not infer unprinted order-code suffixes. The printed mating-part references identify compatible connector families; they do not state that a mating housing, contacts or cable are supplied.
Catalogue unit packing reference 0.55 kg per unit = 550 g. The complete PACKING entry is 0.55 kg; 24 pcs / 14.3 kg / 0.9 CUFT; the carton weight is not the individual unit weight.

Use the full case drawing on PDF page 2 for hole positions, slots and terminal layout. No separate MEAN WELL bracket, cover or cable order code is listed on these MSP-100 pages.

Reliability and Manufacturer Information

MTBF reference 2272.8 K hours minimum under Telcordia SR-332 (Bellcore); 352.4 K hours minimum under MIL-HDBK-217F at 25°C. These are reliability calculations, not a guaranteed operating lifetime.
Manufacturer warranty statement The catalogue lists a five-year warranty, subject to applicable manufacturer terms.
Capacitor specification The MSP-100 feature list specifies 105°C long-life electrolytic capacitors.

MEAN WELL MSP-100 series: Single-Output Medical Power Supply with PFC - MSP-100-3.3

Product form

MEAN WELL MSP-100-3.3 is a single-output medical-type power supply rated at 3.3 V DC, 20 A and 66 W. The... Read more

$123.71 Incl. VAT

    • Guaranteed secure & safe checkout.

      shop pay

    Description

    MEAN WELL MSP-100-3.3 is a single-output medical-type power supply rated at 3.3 V DC, 20 A and 66 W. The 38 mm low-profile enclosure uses free-air convection. Universal AC input, active PFC and remote ON/OFF are provided. Over-temperature protection is an optional configuration on MSP-100, not an assumed feature of every unit. Medical isolation levels and leakage test conditions are specified below; final-equipment suitability requires integration assessment.

    Product Datasheet

    Download MEAN WELL MSP-100 Datasheet (PDF)

    The MSP-100 section is on PDF pages 1, 2. Refer to the complete mechanical drawings and notes when planning installation.

    Model and Output

    Complete model / catalogue MSP-100-3.3; MSP-100 revision 2025-03-17. The final code identifies the nominal 3.3 V output.
    Rated DC output 3.3 V / 20 A / 66 W. Current range at nominal voltage: 0–20 A.
    Voltage adjustment 3.1–3.8 V using SVR1. Observe rated current and power when adjusting voltage.
    Ripple and noise 80 mVp-p maximum; 20 MHz bandwidth, a 12-inch twisted pair terminated by parallel 0.1 µF and 47 µF capacitors.
    Voltage tolerance +2.5 / −3.5%; includes setup tolerance, line regulation and load regulation.
    Line / load regulation ±0.5% / ±2.0%, respectively.
    Typical efficiency 78%, under the default 230 VAC, rated-load and 25°C test conditions.

    The 100 series designation is not a promise of that wattage at every output voltage. Use this model’s 66 W rating together with its current limit and both derating curves.

    Input, Timing and Low-load Consumption

    Input / frequency 85–264 VAC or 120–370 VDC; 47–63 Hz AC. Full-range input with built-in active PFC.
    Typical power factor >0.95 at 230 VAC and >0.98 at 115 VAC, at full load.
    Typical AC input current 1.2 A at 115 VAC; 0.6 A at 230 VAC.
    Typical inrush current 35 A at 115 VAC; 65 A at 230 VAC. The block diagram includes active inrush-current limiting.
    Short-duration input withstand 300 VAC surge input for 5 seconds, as the feature list states. This does not extend the continuous 264 VAC input limit.
    Setup / rise at full load 230 VAC: 2500 / 100 ms; 115 VAC: 2500 / 100 ms.
    Typical hold-up at full load 50 ms at 230 VAC; 20 ms at 115 VAC.
    No-load input power <0.5 W, as stated in the MSP-100 feature list.

    Unless otherwise stated, specifications are measured at 230 VAC input, rated load and 25°C ambient.

    Protection

    Short circuit / overload Short-circuit and overload protection; threshold 105–135% of rated output power. Constant-current limiting for output voltage at 50–100% of nominal, with automatic recovery after the fault is removed.
    Over-voltage 3.96–4.62 V; output shutdown, with re-powering required to recover.
    Over-temperature Optional on MSP-100. When this protection is fitted, the specified action is output shutdown with automatic recovery after temperature decreases. Confirm the required configuration when ordering.

    Protection thresholds are fault-response limits, not continuous or peak-output ratings.

    Remote Control and Power Connections

    Remote ON/OFF logic Across RC+ and RC−: 0–0.8 VDC = ON; 4–10 VDC = OFF. CN100 pin 1 is RC− and pin 2 is RC+.
    AC / earth terminals Terminal 1: AC/L; terminal 2: AC/N; terminal 3: FG protective earth.
    DC output terminals Terminals 4–5: −V; terminals 6–7: +V. Use the numbered mechanical drawing for polarity.
    CN100 signals 1 RC−; 2 RC+. These control pins are distinct from the AC and DC power terminals.

    Use the remote-control logic specified for this family; it must not be inferred from another MSP series.

    Cooling, Derating and Environment

    Cooling Free-air convection; keep ventilation openings unobstructed. The specified curves are for horizontal mounting.
    Working temperature / thermal load −40°C to +60°C, subject to derating. The horizontal curve shows 100% load through +40°C, then falls to 50% at +60°C.
    Input-voltage load curve At 60 Hz, the graph rises from 80% load at 85 VAC to its full-load plateau at 100 VAC, continuing to 264 VAC. Apply this percentage to the model’s own output rating.
    Altitude derating For this fanless model, reduce allowable ambient temperature by 3.5°C per additional 1000 m above 2000 m. This adjustment is not an independently specified maximum operating altitude.
    Humidity / storage Working: 20–90% RH, non-condensing. Storage: −40°C to +85°C, 10–95% RH.
    Temperature coefficient ±0.04%/°C over 0–50°C.
    Vibration 10–500 Hz, 5G; 10 minutes per cycle, 60 minutes along each X, Y and Z axis.

    Input and ambient derating apply together. The maximum working temperature is not a full-load guarantee.

    Medical Isolation, Leakage and EMC

    Listed medical safety standards IEC 60601-1:2005+A1+A2; ANSI/AAMI ES60601-1:2005+A2; CAN/CSA C22.2 No.60601-1:2014+A2; EAC TP TC004 approved, as listed in this catalogue.
    Isolation levels Primary to secondary: 2×MOOP; primary to earth: 1×MOOP; secondary to earth: 1×MOOP.
    Leakage-current limits Earth leakage <300 µA at 264 VAC; touch leakage <100 µA at 264 VAC. Touch current is measured from primary input to DC output.
    Withstand voltage Input–output: 4 kVAC; input–FG: 2 kVAC; output–FG: 0.5 kVAC.
    Insulation resistance 100 MΩ at 500 VDC, 25°C and 70% RH, for input–output, input–FG and output–FG.
    Other design references BS EN/EN60335-1 and BS EN/EN62368-1 are design references by request; they are distinct from the listed medical approvals.
    EMC emissions BS EN/EN55011 (CISPR11) Class B; BS EN/EN61000-3-2 and -3; EAC TP TC020.
    EMC immunity BS EN/EN61000-4-2, -3, -4, -5, -6, -8, -11; BS EN/EN55035; BS EN/EN60601-1-2; EAC TP TC020.

    These MOOP and leakage statements describe the supply under the stated tests; they do not establish MOPP, a patient-applied-part classification, or compliance of a complete medical device.

    The manufacturer’s EMC tests mount the unit on a 360 × 360 mm metal plate, 1 mm thick. As this supply is a component of final equipment, reconfirm EMC compliance after integration.

    At input below 40 VAC, performance can degrade; the final-equipment manufacturer must verify that this abnormal-input behavior does not affect basic safety or essential performance. This note does not extend the rated 85 VAC operating range.

    Mechanical Installation, Connectors and Weight

    Body dimensions / case 159 × 97 × 38 mm (L × W × H), general tolerance ±1 mm; case drawing 901I. The 38 mm height is the low-profile / 1U feature stated by the manufacturer.
    Terminal projection The mechanical drawing marks a terminal projection of 10 mm maximum beyond the body; allow this additional connection clearance.
    Mounting-hole callouts 2-M3 L=4; 6-M3 (Both Sides) L=6. The L values are drawing thread-length labels in mm. They do not identify an included screw kit.
    Adjustment / indicator SVR1 and CN100 are located in the mechanical drawing.
    Control connector as printed CN100: JST B-XH or equivalent. Mating housing: JST XHP or equivalent. Contact: JST SXH-001T or equivalent.
    Connector selection Header and mating-housing names are printed prefixes; do not infer unprinted order-code suffixes. The printed mating-part references identify compatible connector families; they do not state that a mating housing, contacts or cable are supplied.
    Catalogue unit packing reference 0.55 kg per unit = 550 g. The complete PACKING entry is 0.55 kg; 24 pcs / 14.3 kg / 0.9 CUFT; the carton weight is not the individual unit weight.

    Use the full case drawing on PDF page 2 for hole positions, slots and terminal layout. No separate MEAN WELL bracket, cover or cable order code is listed on these MSP-100 pages.

    Reliability and Manufacturer Information

    MTBF reference 2272.8 K hours minimum under Telcordia SR-332 (Bellcore); 352.4 K hours minimum under MIL-HDBK-217F at 25°C. These are reliability calculations, not a guaranteed operating lifetime.
    Manufacturer warranty statement The catalogue lists a five-year warranty, subject to applicable manufacturer terms.
    Capacitor specification The MSP-100 feature list specifies 105°C long-life electrolytic capacitors.

    Recently viewed products

      Footer image

      © 2026 MEAN WELL, ,

      • US (USD $) US (USD $)
      • Ach Direct Debit
      • AliPay
      • Amazon
      • American Express
      • Apple Pay
      • Diners Club
      • Discover
      • Google Pay
      • Mastercard
      • PayPal
      • Shop Pay
      • USDC
      • Visa