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Mean Well MSP-300-3.3 Power Supply 198W 3.3V 60A

built-in active PFCmedical safety approvedhigh efficiencyno load power consumption < 0.5~0.8W

SKU MSP-300-3.3

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Select model — 5 in this family

MSP-300-3.3

MSP-100-3.3 100W 3.3V Backorder

MSP-200-3.3 200W 3.3V Backorder

MSP-300-3.3 300W 3.3V Backorder

MSP-450-3.3 450W 3.3V Backorder

MSP-600-3.3 600W 3.3V Backorder

Product variants

Available to order

Overview

MSP-300-3.3 is the 3.3V output model of this series: rated current 60A, rated power 198W, typical efficiency 80%.

Features

Universal AC input / Full range
Built-in active PFC function, PF>0.95
High efficiency up to 89%
Withstand 300VAC surge input for 5 seconds
Protections: Short circuit / Overload / Over voltage / Over temperature
Built-in constant current limiting circuit
1U low profile 41mm
Medical safety approved (MOOP level)
Built-in cooling fan ON-OFF control
Built-in DC OK signal
Built-in remote ON-OFF control
Standby 5V@0.3A
Built-in remote sense function
No load power consumption<0.5W (Note.6)
5 years warranty

Specifications

MSP-300-3.3Specifications from the official datasheet (2026-02-09 edition)

OUTPUT

DC VOLTAGE: 3.3V
RATED CURRENT: 60A
CURRENT RANGE: 0 ~ 60A
RATED POWER: 198W
RIPPLE & NOISE (max.)^Note.2: 80mVp-p
VOLTAGE ADJ. RANGE: 2.8 ~ 3.8V
VOLTAGE TOLERANCE^Note.3: ±2.5%
LINE REGULATION: ±0.5%
LOAD REGULATION: ±1.0%
SETUP, RISE TIME: 1000ms, 50ms/230VAC 2500ms, 50ms/115VAC at full load
HOLD UP TIME (Typ.): 16ms/230VAC 16ms/115VAC at full load

INPUT

VOLTAGE RANGE^Note.5: 85 ~ 264VAC 120 ~ 370VDC
FREQUENCY RANGE: 47 ~ 63Hz
POWER FACTOR (Typ.): PF>0.95/230VAC PF>0.99/115VAC at full load
EFFICIENCY (Typ.): 80%
AC CURRENT (Typ.): 4.5A/115VAC 2.25A/230VAC
INRUSH CURRENT (Typ.): 35A/115VAC 70A/230VAC
LEAKAGE CURRENT: Earth leakage current < 450μA/264VAC , Touch leakage current < 100μA/264VAC

PROTECTION

OVERLOAD: 105 ~ 135% rated output power Protection type : Constant current limiting, recovers automatically after fault condition is removed
OVER VOLTAGE: 3.96 ~ 4.62V Protection type : Shut down o/p voltage, re-power on to recover
OVER TEMPERATURE: Shut down o/p voltage, recovers automatically after temperature goes down

FUNCTION

5V STANDBY: 5VSB : 5V@0.3A ; tolerance±5%, ripple : 50mVp-p(max.)
DC OK SIGNAL: PSU turns on : 3.3 ~ 5.6V ; PSU turns off : 0 ~ 1V
REMOTE CONTROL: RC+ / RC-: 4 ~ 10V or open = power on ; 0 ~ 0.8V or short = power off
FAN CONTROL (Typ.): Load 35±15% or RTH2≧50℃ Fan on

ENVIRONMENT

WORKING TEMP.: -40 ~ +70℃ (Refer to "Derating Curve")
WORKING HUMIDITY: 20 ~ 90% RH non-condensing
STORAGE TEMP., HUMIDITY: -40 ~ +85℃, 10 ~ 95% RH
TEMP. COEFFICIENT: ±0.03%/℃ (0 ~ 50℃)
VIBRATION: 10 ~ 500Hz, 5G 10min./1cycle, 60min. each along X, Y, Z axes

SAFETY & EMC (Note 4)

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 TC 004 approved; Design refer to BS EN/EN60335-1, BS EN/EN 62368-1(by request)
ISOLATION LEVEL: Primary-Secondary: 2×MOOP, Primary-Earth: 1×MOOP
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, O/P-FG:100M Ohms / 500VDC / 25℃/ 70% RH
EMC EMISSION: Compliance to BS EN/EN55011 (CISPR11) Class B, BS EN/EN61000-3-2,-3, EAC TP TC 020
EMC IMMUNITY: Compliance to BS EN/ EN61000-4-2,3,4,5,6,8,11, BS EN/ EN55035, BS EN/ EN60601-1-2 , EAC TP TC 020

OTHERS

MTBF: 1337.5K hrs min. Telcordia SR-332 (Bellcore) ; 175.8K hrs min. MIL-HDBK-217F (25℃)
DIMENSION: 199*105*41mm (L*W*H)
PACKING: 0.95Kg;15pcs/15.3Kg/0.83CUFT

Test conditions and notes7

1. All parameters NOT specially mentioned are measured at 230VAC input, rated load and 25℃ of ambient temperature.
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. Tolerance : includes set up tolerance, line regulation and load regulation.
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 https://www.meanwell.com//Upload/PDF/EMI_statement_en.pdf )
5. Derating may be needed under low input voltages. Please check the derating curve for more details.
6. No load power consumption<0.5W when RC- & RC+ (CN100 pin4,6) 0 ~ 8V or short.
7. The ambient temperature derating of 3.5℃/1000m with fanless models and of 5℃/1000m with fan models for operating altitude higher than 2000m(6500ft).

Technical drawings

MSP-300-3.3 Mechanical Specification — Mechanical Specification

MSP-300-3.3 Block Diagram — Block Diagram

MSP-300-3.3 Derating Curve — Derating Curve

MSP-300-3.3 M S P - 3 0 0 series — M S P - 3 0 0 series

MSP-300-3.3 2.DC-OK Signal — 2.DC-OK Signal

MSP-300-3.3 3.Remote Control — 3.Remote Control

Downloads

Datasheet1

MSP-300-3.3 datasheetMSP-300-SPEC.PDF · 2026-02-09 edition PDF Download

Certificates3

UL Certificate(MSP-300)(EN) PDF Download

CB Certificate(MSP-300)(EN) PDF Download

EMC Certificate(MSP-300)(EN) PDF Download

Catalogues1

Mean Well Catalog (Industrial) PDF Download

FAQ

Can I use the MSP-300-3.3 for a 3.3V logic or processor rail in embedded equipment?

Yes, this model provides constant voltage 3.3V output rated at 198W and 60A. It is appropriate for high-current 3.3V embedded loads that require a regulated low-voltage rail.

Is the MSP-300-3.3 suitable for FPGA, memory, or backplane-style 3.3V loads?

It can be used where the equipment needs a stable 3.3V supply and the total demand stays within 198W and 60A. Its 60A rating, shared only with the MSP-300-5, is the highest output current in the MSP-300 series.

Can this unit support a 3.3V industrial controller or communications board assembly?

Yes, if the system is designed for constant voltage 3.3V input and remains within 60A and 198W. It also accepts 85-264VAC input, which helps when the AC source varies across installations.

Is the MSP-300-3.3 intended for outdoor use?

The operating temperature range is -40°C to +70°C, with output derating required per the datasheet's derating curve, but no IP rating is listed in the provided specifications. Based on that information, temperature tolerance is defined, while outdoor exposure protection is not.

How does the MSP-300-3.3 compare with the rest of the MSP-300 range?

In the MSP-300 lineup, the outputs are MSP-300-3.3 at 198W, 3.3V, 60A; MSP-300-5 at 300W, 5V, 60A; MSP-300-7.5 at 300W, 7.5V, 40A; MSP-300-12 at 324W, 12V, 27A; MSP-300-15 at 330W, 15V, 22A; MSP-300-24 at 336W, 24V, 14A; MSP-300-36 at 324W, 36V, 9A; and MSP-300-48 at 336W, 48V, 7A. This version is the lowest-voltage option and one of the highest-current options in that group.

Payment & Security

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Model	Power	Voltage	Current
Mean Well MSP-300-7.5 Power Supply 300W 7.5V 40A	300W	7.5V	40A	View
Mean Well MSP-300-5 Power Supply 300W 5V 60A	300W	5V	60A	View
Mean Well MSP-300-48 Power Supply 336W 48V 7A	336W	48V	7A	View
Mean Well MSP-300-36 Power Supply 324W 36V 9A	324W	36V	9A	View
Mean Well MSP-300-24 Power Supply 336W 24V 14A	336W	24V	14A	View
Mean Well MSP-300-15 Power Supply 330W 15V 22A	330W	15V	22A	View
Mean Well MSP-300-12 Power Supply 324W 12V 27A	324W	12V	27A	View

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Mean Well MSP-300-3.3 Power Supply 198W 3.3V 60A

Select model — 5 in this family

Overview

Features

Specifications

OUTPUT

INPUT

PROTECTION

FUNCTION

ENVIRONMENT

SAFETY & EMC (Note 4)

OTHERS

Technical drawings

Downloads

Datasheet1

Certificates3

Catalogues1

FAQ

Payment & Security

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Mean Well MSP-300-3.3 Power Supply 198W 3.3V 60A

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