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Mean Well MPS-45-3.3 Power Supply 45W 3.3V 8A

SKU MPS-45-3.3
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End of Life, Succeeded by RPS-45-3.3
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Overview

MPS-45-3.3 is the 3.3V output model of this series: rated current 8A, rated power 26.4W, typical efficiency 65%.

Features

  • Universal AC input / Full range
  • Low leakage current <250μA
  • Protections: Short circuit / Overload / Over voltage
  • Cooling by free air convection
  • Medical safety approved (2 x MOPP between primary to secondary)
  • 100% full load burn-in test
  • Fixed switching frequency at 45KHz
  • 3 years warranty

Specifications

MPS-45-3.3Specifications from the official datasheet (2021-09-15 edition)

OUTPUT

DC VOLTAGE
3.3V
RATED CURRENT
8A
CURRENT RANGE
0 ~ 10.7A
RATED POWER
26.4W
OUTPUT POWER (max.)
52W(+3.3V:35W)with 18CFM min. Forced air convection
RIPPLE & NOISE (max.)Note.2
80mVp-p
VOLTAGE ADJ. RANGE
2.97 ~ 3.63V
VOLTAGE TOLERANCENote.3
±3.0%
LINE REGULATION
±1.0%
LOAD REGULATION
±3.0%
SETUP, RISE TIME
800ms, 30ms/230VAC 1200ms, 30ms/115VAC at full load
HOLD UP TIME (Typ.)
50ms/230VAC 16ms/115VAC at full load

INPUT

VOLTAGE RANGE
90 ~ 264VAC 127 ~ 370VDC
FREQUENCY RANGE
47 ~ 63Hz
EFFICIENCY(Typ.)
65%
AC CURRENT (Typ.)
1.2A/115VAC 0.7A/230VAC
INRUSH CURRENT (Typ.)
COLD START 17A/115VAC 40A/230VAC
LEAKAGE CURRENTNote.7
Earth leakage current < 250 μA/264VAC , Touch current < 60 μA/264VAC

PROTECTION

OVERLOAD
53 ~ 75W (3.3V:36 ~ 55W) rated output power Protection type : Hiccup mode, recovers automatically after fault condition is removed
OVER VOLTAGE
3.8 ~ 4.46V Protection type : Hiccup mode, recovers automatically after fault condition is removed

ENVIRONMENT

WORKING TEMP.
-10 ~ +60℃ (Refer to "Derating Curve")
WORKING HUMIDITY
20 ~ 90% RH non-condensing
STORAGE TEMP., HUMIDITY
-20 ~ +85℃, 10 ~ 95% RH
TEMP. COEFFICIENT
±0.04%/℃ (0 ~ 50℃))
VIBRATION
10 ~ 500Hz, 2G 10min./1cycle, period for 60min. each along X, Y, Z axes

SAFETY & EMC (Note 4)

SAFETY STANDARDS
ANSI/AAMI ES60601-1, TUV EN60601-1, IEC60601-1 approved
ISOLATION LEVEL
Primary-Secondary: 2xMOPP, Primary-Earth:1xMOPP
WITHSTAND VOLTAGE
I/P-O/P:4KVAC I/P-FG:2KVAC O/P-FG:0.5KVAC
ISOLATION RESISTANCE
I/P-O/P, I/P-FG:100M Ohms / 500VDC / 25℃/ 70% RH
EMC EMISSION
Compliance to EN55011 (CISPR11) Class B, EN61000-3-2,-3
EMC IMMUNITY
Compliance to EN61000-4-2,3,4,5,6,8,11, EN60601-1-2, medical level, criteria A

OTHERS

MTBF
366.1Khrs min. MIL-HDBK-217F (25℃)
DIMENSION
127*76*28mm (L*W*H)
PACKING
0.18Kg; 72pcs/15.1Kg/1.28CUFT
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. The power supply is considered a component which will be installed into a final equipment. All the EMC tests are been executed by mounting the unit on a 360mm*360mm metal plate with 1mm of thickness. 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)
  5. 5. Mounting holes M1 and M2 should be grounded for EMI purposes.
  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-45-3.3 Mechanical Specification
Mechanical Specification
MPS-45-3.3 Block Diagram
Block Diagram
MPS-45-3.3 Derating Curve
Derating Curve

Downloads

FAQ

Can I use the MPS-45-3.3 for a 3.3V embedded controller or single-board computer?

Yes, if the equipment requires a constant 3.3V DC supply and stays within 8A and 26.4W. That makes it suitable for embedded controllers, logic boards, or industrial computing hardware designed for 3.3V input. The wide 90-264VAC input also fits sites with different AC mains standards.

Is this power supply appropriate for 3.3V industrial I/O or automation electronics?

It can be a fit for 3.3V automation electronics that need regulated constant-voltage output rated at 8A. Typical use cases include low-voltage control boards, interface electronics, and monitoring modules that run on 3.3V DC. The key selection limits are the 3.3V output and 26.4W rated power.

Can the MPS-45-3.3 power multiple 3.3V digital boards in one system?

It can support multiple 3.3V boards as long as the combined load does not exceed 8A or 26.4W. This is often relevant in compact industrial or embedded systems where several logic devices share one low-voltage rail. It is a constant-voltage model, so it should only be used with loads designed for 3.3V DC.

Is the MPS-45-3.3 suitable for outdoor or harsh-environment use?

The listed specs show an operating range of -10°C to +60°C, but no IP rating is provided. That means the temperature range is defined, while dust and water protection are not. It is better suited to protected indoor enclosures or equipment housings unless the final assembly provides the required environmental protection.

How does the MPS-45-3.3 compare with other 3.3V models in the MPS series?

The MPS-45 sheet lists only one 3.3V model: the MPS-45-3.3, rated at 26.4W and 8A, the lowest power in the MPS-45 series. The other MPS-45 versions run from 5V at 40W and 8A up to 48V at 48W and 1A. All share the same 90-264VAC input and 127*76*28mm size, so the main differences are output voltage, current and power.

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Mean Well MPS-45-3.3 Power Supply 45W 3.3V
Mean Well

Mean Well MPS-45-3.3 Power Supply 45W 3.3V 8A

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MPS-45-3.3 is the 3.3V output model of this series: rated current 8A, rated power 26.4W, typical efficiency 65%.

Features

  • Universal AC input / Full range
  • Low leakage current <250μA
  • Protections: Short circuit / Overload / Over voltage
  • Cooling by free air convection
  • Medical safety approved (2 x MOPP between primary to secondary)
  • 100% full load burn-in test
  • Fixed switching frequency at 45KHz
  • 3 years warranty
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