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Mean Well MPS-120-3.3 Power Supply 79W 3.3V he rated current is based on there being a fan that can provide 25CFM. 24A

SKU MPS-120-3.3
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End of Life, Succeeded by RPS-120-3.3
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Overview

MPS-120-3.3 is the 3.3V output model of this series: rated current 24A, typical efficiency 68%.

Specifications

MPS-120-3.3Specifications from the official datasheet (2013-08-16 edition)Download datasheet PDF

Output Chart

OUTPUT VOLTAGE
3.3V
RATED CURRENT
24A
OUTPUT CURRENT MINIMUM LOAD
0A
OUTPUT CURRENT CONVECTION (max.)
16A
OUTPUT CURRENT WITH FAN WITH 25CFM FAN (Note 2)Note 2
24A
OUTPUT CURRENT PEAK LOAD WITH 25CFM FAN (Max.) (Note 4)Note 4
26A
RIPPLE & NOISE (Max.) (Note 2)Note 2
80mVp-p
VOLTAGE TOLERANCE (Note 3)Note 3
±3.0%
LINE REGULATION
±1.0%
LOAD REGULATION
±3.0%
EFFICIENCY
68%

Specification

AC INPUT VOLTAGE
90~264VAC, 47~440Hz / 127~370VDC
AC INPUT CURRENT (Typ.)
Maximum input current 2.9A at 115VAC, 60Hz or 1.7A at 230VAC, 60Hz with 100% output load
INRUSH CURRENT (Typ.)
Less than 22A at 115VAC or less than 50A at 230VAC under cold start conditions; limited by internal thermistors
SETUP, RISE TIME
800ms, 20ms / 230VAC at full load; 2000ms, 50ms / 115VAC at full load
HOLD-UP TIME (Typ.)
80ms / 230VAC at full load; 14ms / 115VAC at full load
LEAKAGE CURRENT (Note 7)Note 7
Earth leakage current < 150μA/264VAC, Touch current < 100μA/264VAC
DC OUTPUT ADJ. RANGE
-5%~+10% rated output voltage, adjustable by potential meter
OVERLOAD PROTECTION
Protected against short circuit and overload; hiccup mode at 120~160% rated load (MPS-120), recovers automatically after fault condition is removed
OVER VOLTAGE PROTECTION
115%~135% rated output voltage, shut down
WORKING TEMP.
-20~70℃ (refer to derating curves)
WORKING HUMIDITY
20~90% RH non-condensing
STORAGE TEMP., HUMIDITY
-40~+85℃, 10~90% RH
TEMP. COEFFICIENT
±0.04%/℃ on all outputs at full load (0~50℃)
VIBRATION
2G, 10Hz~500Hz, 10-minute cycle; 6 testing cycles (60 minutes) each along X, Y, Z axes
SAFETY STANDARDS
Medical: UL60601-1, TUV EN60601-1, IEC60601-1 approved; Commercial: also designed referring to UL60950-1, TUV EN60950-1
WITHSTAND VOLTAGE
I/P-O/P:4000VAC, I/P-FG:2000VAC, O/P-FG:500VAC
ISOLATION RESISTANCE
>100M Ohms for I/P-O/P, I/P-FG, O/P-FG at 500VDC
EMI COMPLIANCE
Conducted & Radiation: EN55011 Class B, EN55022 Class B; Harmonic distortion: EN61000-3-2; Voltage flicker: EN61000-3-3
EMS COMPLIANCE
ESD air: EN61000-4-2 Level 3, 8KV; ESD contact: EN61000-4-2 Level 2, 4KV; RF field susceptibility: EN61000-4-3 Level 2, 3V/m, Level 3, 10V/m; EFT/Burst: EN61000-4-4 Level 2, 1KV/5KHz, Level 3, 2KV/5KHz; Lightning/Surge: EN61000-4-5 Level 2, 2KV/Line-Line, Level 4, 4KV/Line-Earth; Conducted RF susceptibility: EN61000-4-6 Level 2, 3Vrms/m, Level 3, 10Vrms/m; Magnetic field immunity: EN61000-4-8 Level 2, 3A/m, Level 3, 10A/m; Voltage dip, interruption: EN61000-4-11 compliance; Digital phone carrier immunity: ENV50204 Level 2, 3V/m, 900MHz, Level 3, 10A/m, 900MHz
MTBF
262,100 hours min. at full load and 25℃ of ambient temperature, MIL-HDBK-217F
DIMENSION (L*W*H)
177.8x107.95x35.5mm or 7"x4.25"x1.4"
PACKING
0.55Kg; 24pcs/14.5Kg/0.99CUFT
Test conditions and notes7
  1. 1. All parameters NOT specially mentioned are measured at 230VAC input, rated load and 25℃ of ambient temperature.
  2. 2. Ripple & noise are measured at 20MHz of bandwidth by using a 12" twisted pair-wire terminated with a 0.1μf & 47μf parallel capacitor.
  3. 3. Tolerance : includes set up tolerance, line regulation and load regulation.
  4. 4. 33% Duty cycle maximum within every 30 seconds. Average output power should not exceed the rated power.
  5. 5. The power supply is considered a component which will be installed into a final equipment. The final equipment must be re-confirmed that it still meets EMC directives. For guidance on how to perform these EMC tests, please refer to "EMI testing of component power supplies." (as available on http://www.meanwell.com)
  6. 6. Heat Sink HS1,HS2 can not be shorted.
  7. 7. Touch current was measured from primary input to DC output.

Technical drawings

MPS-120-3.3 1 2 0 W M e d i c a l series
1 2 0 W M e d i c a l series

Downloads

FAQ

Can I use the MPS-120-3.3 for a 3.3V industrial controller or logic board?

Yes, this is a constant-voltage 3.3V power supply rated for up to 24A and 79.2W with a 25CFM fan, or 16A with convection cooling. It fits 3.3V industrial control electronics, embedded boards, and logic-level equipment that need a high-current 3.3V DC source within that output range.

Is this power supply suitable for 3.3V embedded systems with multiple high-current loads?

It can support 3.3V embedded systems when the combined load stays within 24A and 79.2W with a 25CFM fan. With convection cooling alone, the combined load must stay within 16A.

Can this unit power 3.3V automation electronics in a control cabinet?

Yes, the 3.3V constant-voltage output is suited to cabinet-based automation electronics that require regulated 3.3V DC. Its wide 90-264VAC input also helps when the AC source varies across standard global mains ranges.

Is the MPS-120-3.3 rated for outdoor or washdown environments?

The provided specs list an operating temperature of -20°C to +70°C (with derating per the derating curves), but no IP rating is given. That means the temperature range is defined, while outdoor, wet, or washdown suitability is not confirmed by the listed data.

How does the MPS-120-3.3 compare with other 3.3V MPS models?

On this spec sheet the MPS-120-3.3 is the only 3.3V model of the 120W medical series, rated 79.2W at 24A with a 25CFM fan or 16A by convection. The other single-output MPS-120 models cover 5V, 12V, 15V, 24V and 48V.

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Mean Well MPS-120-3.3 Power Supply 79W 3.3V he rated current is based on there being a fan that can provide 25CFM.
Mean Well

Mean Well MPS-120-3.3 Power Supply 79W 3.3V he rated current is based on there being a fan that can provide 25CFM. 24A

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MPS-120-3.3 is the 3.3V output model of this series: rated current 24A, typical efficiency 68%.

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