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Mean Well MFM-05-3.3 Power Supply 5W 3.3V 1.25A

Name: Mean Well MFM-05-3.3 Power Supply 5W 3.3V 1.25A
Brand: Mean Well
SKU: MFM-05-3.3
Price: 8.68 USD
Availability: InStock

PCB typecompact sizemedical safety approvedno load power consumption < 0.1Wextremely low leakage current

SKU MFM-05-3.3

$8.68 USD

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Overview

MFM-05-3.3 is the 3.3V output model of this series: rated current 1.25A, rated power 4.1W, typical efficiency 74%.

MFM-05 is a 5 W high density and small size ( 42 * 22 . 3 * 20 . 5 mm) AC/DC on board type medical grade power supply series. It features the operation for 80~ 264 VAC, a low no load power consumption less than 0.075W, a high efficiency up to 82 %, Class Ⅱ (no FG) double insulation, outstanding dissipation , 5G anti-vibration, high EMC performance, 4KVAC isolation, etc. The design observes IEC/ BS EN /EN60601-1 and ANSI/AAMI ES60601 - 1 version three with 2xMOPP level and ultra-low leakage current (< 8 0μA). It is very suitable for BF (patient contact) type medical device or relevant equipment.

Features

1.65"x0.88" compact size
Medical safety approved (2 x MOPP) according to ANSI/AAMI ES60601-1 and IEC/BS EN/EN60601-1
Suitable for BF application with appropriate system consideration
No load power consumption<0.075W
Extremely low leakage current
Wide operating temp. range -40 ~ +85℃
EMI class B for class Ⅱ configuration
Protections: Short circuit / Overload / Over voltage / Over temperature
No minimum load required
Typical lifetime > 52K hours
3 years warranty

Specifications

MFM-05-3.3Specifications from the official datasheet (2024-10-30 edition)

OUTPUT

DC VOLTAGE: 3.3V
RATED CURRENT: 1.25A
CURRENT RANGE^Note.2: 0 ~ 1.25A
PEAK CURRENT: 1.38A
RATED POWER: 4.1W
PEAK LOAD(10sec.)^Note.3: 4.6W
RIPPLE & NOISE (max.)^Note.4: 100mVp-p
VOLTAGE TOLERANCE^Note.5: ±2.5%
LINE REGULATION: ±0.3%
LOAD REGULATION: ±0.5%
SETUP, RISE TIME: 1000ms, 30ms/230VAC 1000ms, 30ms/115VAC at full load
HOLD UP TIME (Typ.): 40ms/230VAC 12ms/115VAC at full load

INPUT

VOLTAGE RANGE^Note.6: 80 ~ 264VAC 113V~370VDC
FREQUENCY RANGE: 47 ~ 440Hz
EFFICIENCY (Typ.): 74%
AC CURRENT (Typ.): 0.2A/115VAC 0.1A/230VAC
INRUSH CURRENT (Typ.): COLD START 25A/115VAC 45A/230VAC
LEAKAGE CURRENT (max.)^Note.7: Touch current <80μA/264VAC

PROTECTION

OVERLOAD: 110% ~ 180% rated output power Protection type : Hiccup mode, recovers automatically after fault condition is removed
OVER VOLTAGE: 3.8 ~ 5V Protection type : Shut off o/p voltage, clamping by zener diode
OVER TEMPERATURE: Protection type : Shut down o/p voltage, recovers automatically after temperature goes down

ENVIRONMENT

WORKING TEMP.: -40 ~ +85℃ (Refer to "Derating Curve")
WORKING HUMIDITY: 20 ~ 90% RH non-condensing
STORAGE TEMP., HUMIDITY: -40 ~ +100℃, 10 ~ 95% RH non-condensing
TEMP. COEFFICIENT: ±0.03%/℃ (0 ~ 60℃)
SOLDERING TEMPERATURE: Wave soldering: 265℃,5s (max.); Manual soldering: 390℃,3s (max.)
VIBRATION: 10 ~ 500Hz, 5G 10min./1cycle, period for 60min. each along X, Y, Z axes
OPERATING ALTITUDE^Note.8: 5000 meters

SAFETY & EMC

SAFETY STANDARDS: IEC 60601-1:2005+A1,TUV BS EN/ EN 60601-1:2006+A1+A12+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(by request)
ISOLATION LEVEL: Primary-Secondary: 2xMOPP
WITHSTAND VOLTAGE: I/P-O/P:4KVAC
ISOLATION RESISTANCE: I/P-O/P:100M Ohms / 500VDC / 25℃/ 70% RH
EMC EMISSION: Parameter Standard Test Level

Conducted BS EN/EN55011 (CISPR11) Class B
Radiated BS EN/EN55011 (CISPR11) Class B
Harmonic Current BS EN/EN61000-3-2 Class A
Voltage Flicker BS EN/EN61000-3-3
EMC IMMUNITY^{Note 9}: BS EN/EN55035, BS EN/EN60601-1-2

Parameter Standard Test Level

ESD BS EN/EN61000-4-2 Level 4, 15KV air; Level 4, 8KV contact
RF field susceptibility BS EN/EN61000-4-3 Level 3, 10V/m( 80MHz~2.7GHz ) Table 9, 9~28V/m( 385MHz~5.78GHz )
EFT bursts BS EN/EN61000-4-4 Level 3, 2KV
Surge susceptibility BS EN/EN61000-4-5 Level 3, 1KV/Line-Line
Conducted susceptibility BS EN/EN61000-4-6 Level 3, 10V
Magnetic field immunity BS EN/EN61000-4-8 Level 4, 30A/m
Voltage dip, interruption BS EN/EN61000-4-11 100% dip 1 periods, 30% dip 25 periods, 100% interruptions 250 periods

Parameter	Standard	Test Level
Conducted	BS EN/EN55011 (CISPR11)	Class B
Radiated	BS EN/EN55011 (CISPR11)	Class B
Harmonic Current	BS EN/EN61000-3-2	Class A
Voltage Flicker	BS EN/EN61000-3-3

Parameter	Standard	Test Level
ESD	BS EN/EN61000-4-2	Level 4, 15KV air; Level 4, 8KV contact
RF field susceptibility	BS EN/EN61000-4-3	Level 3, 10V/m( 80MHz~2.7GHz ) Table 9, 9~28V/m( 385MHz~5.78GHz )
EFT bursts	BS EN/EN61000-4-4	Level 3, 2KV
Surge susceptibility	BS EN/EN61000-4-5	Level 3, 1KV/Line-Line
Conducted susceptibility	BS EN/EN61000-4-6	Level 3, 10V
Magnetic field immunity	BS EN/EN61000-4-8	Level 4, 30A/m
Voltage dip, interruption	BS EN/EN61000-4-11	100% dip 1 periods, 30% dip 25 periods, 100% interruptions 250 periods

OTHERS

MTBF: 9337.3K hrs min. Telcordia SR-332 (Bellcore) ; 1799.5K hrs min. MIL-HDBK-217F (25℃)
DIMENSION: 42*22.3*20.5mm (L*W*H) or 1.65"*0.88"0.80" inch
PACKING: 0.018Kg; 270pcs/5.8Kg/0.94CUFT

Test conditions and notes9

1. All parameters NOT specially mentioned are measured at 230VAC input, rated load and 25℃ of ambient temperature.
2. No minimum load required.
3. 33% Duty cycle maximum within every 30 seconds. Average output power should not exceed the rated power
4. Ripple & noise are measured at 20MHz of bandwidth by using a 12" twisted pair-wire terminated with a 0.1μF & 47μF parallel capacitor.
5. Tolerance : includes set up tolerance, line regulation and load regulation.
6. Derating may be needed under low input voltages. Please check the derating curve for more details.
7. Touch current was measured from primary input to DC output.
8. 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).
9. 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 https://www.meanwell.com//Upload/PDF/EMI_statement_en.pdf )

Technical drawings

MFM-05-3.3 fosc : 100KHz — fosc : 100KHz

MFM-05-3.3 Derating Curve — Derating Curve

MFM-05-3.3 Mechanical Specification — Mechanical Specification

Typical applications

Portable medical device
Mobile clinical workstation
Medical computer monitor
Medical examination instrument

Downloads

Certificates7

Mean Well MFM-MPM-05-10-CB Certificate PDF Download

Mean Well MFM-MPM-05-10-EMC Certificate PDF Download

Mean Well MFM-MPM-05-10-CE-dec Certificate PDF Download

Mean Well MFM-MPM-05-10-UK-dec Certificate PDF Download

Mean Well MFM-MPM-05-10-TUV Certificate PDF Download

Mean Well 0147476-EAC Certificate PDF Download

Mean Well E227340 UL Certificate PDF Download

Test reports1

Mean Well MFM-05-3.3 Test Report PDF Download

Catalogues1

Mean Well Catalog (Industrial) PDF Download

FAQ

Can I use the MFM-05-3.3 for a 3.3V embedded controller or sensor board?

Yes, this is a constant voltage 3.3V supply rated for 4.1W and 1.25A. It suits low-power embedded controllers, sensor boards, and logic-level electronics that need a regulated 3.3V rail within that output limit.

Is the MFM-05-3.3 a fit for compact industrial or automation electronics with 3.3V logic?

It can fit compact automation or industrial electronics that need a 3.3V constant voltage supply and do not exceed 1.25A. The PCB-type format and 42.0 × 22.3 × 20.5 mm size make it relevant where board space is limited.

Can this model power low-voltage IT or communications circuitry?

It is intended for low-power 3.3V electronics rather than higher-voltage loads. The output is limited to 4.1W total at 3.3V and 1.25A, so it matches small IT or communications boards that stay inside those limits.

How does the MFM-05-3.3 compare with other MFM power supplies?

The MFM-05 series on this sheet covers 3.3V, 5V, 12V, 15V and 24V outputs with ratings from 4.1W to 5.5W. Siblings are MFM-05-5 at 5W 5V 1A, MFM-05-12 at 5W 12V 0.42A, MFM-05-15 at 5W 15V 0.33A, and MFM-05-24 at 5.5W 24V 0.23A. All share the 80-264VAC input, the 42 × 22.3 × 20.5 mm size and 2xMOPP medical approval. The MFM-05-3.3 is the lowest-voltage, 4.1W option in the group, with the highest output current (1.25A).

Is the MFM-05-3.3 suitable for outdoor equipment?

The operating temperature range is -40°C to +85°C (with derating at higher temperatures), which defines the thermal range in the specs. However, no IP rating is listed, so the provided data does not specify outdoor dust or water protection.

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Model	Power	Voltage	Current	IP Rating	Price
Mean Well MFM-05-5 Power Supply 5W 5V 1A	5W	5V	1A	IP20	$8.68	View
Mean Well MFM-05-24 Power Supply 5W 24V 230mA	5.5W	24V	0.23A	IP20	$8.68	View
Mean Well MFM-05-15 Power Supply 5W 15V 330mA	5W	15V	0.33A	IP20	$8.68	View
Mean Well MFM-05-12 Power Supply 5W 12V 420mA	5W	12V	0.42A	IP20	$8.68	View

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