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Mean Well

Mean Well MFM-20-3.3 Power Supply 20W 3.3V 4.5A

PCB typecompact sizemedical safety approvedno load power consumption < 0.1Wextremely low leakage current
SKU MFM-20-3.3
$14.02 USD
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Overview

MFM-20-3.3 is the 3.3V output model of this series: rated current 4.5A, rated power 14.9W, typical efficiency 81%.

MFM-20 is a 20 W high density and small size ( 49 *2 3 . 8 * 23 mm) AC/DC o n boa r d type medical power supply series. It features the operation for 80~ 264 VAC, a low no load power consumption less than 0. 1 W , a high efficiency up to 87 %, 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

  • 1.93"x0.94" 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<0.1W
  • Extremely low leakage current
  • Wide operating temp. range -35 ~ +85℃
  • EMI class B for class Ⅱ configuration
  • Protections: Short circuit / Overload / Over voltage / Over temperature
  • No minimum load required
  • 3 years warranty

Specifications

MFM-20-3.3Specifications from the official datasheet (2024-10-30 edition)

OUTPUT

DC VOLTAGE
3.3V
RATED CURRENT
4.5A
CURRENT RANGENote.2
0 ~ 4.5A
PEAK CURRENT
4.95A
RATED POWER
14.9W
PEAK LOAD(10sec.)Note.3
16.3W
RIPPLE & NOISE (max.)Note.4
150mVp-p
VOLTAGE TOLERANCENote.5
±2.0%
LINE REGULATION
±0.5%
LOAD REGULATION
±0.5%
SETUP, RISE TIME
1500ms, 30ms/230VAC 1500ms, 30ms/115VAC at full load
HOLD UP TIME (Typ.)
40ms/230VAC 10ms/115VAC at full load

INPUT

VOLTAGE RANGENote.6
80 ~ 264VAC 113V~370VDC
FREQUENCY RANGE
47 ~ 440Hz
EFFICIENCY (Typ.)
81%
AC CURRENT (Typ.)
0.75A/115VAC 0.5A/230VAC
INRUSH CURRENT (Typ.)
COLD START 20A/115VAC 45A/230VAC
LEAKAGE CURRENT (max.)Note.7
Touch current <80μA/264VAC

PROTECTION

OVERLOAD
110% ~ 150% 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.
-35 ~ +85℃ (Refer to "Derating Curve")
WORKING HUMIDITY
20 ~ 90% RH non-condensing
STORAGE TEMP., HUMIDITY
-40 ~ +85℃, 10 ~ 95% RH non-condensing
TEMP. COEFFICIENT
±0.03%/℃ (0 ~ 50℃)
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 ALTITUDENote.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/A2:2021, CAN/CSA C22.2 No. 60601-1:2014+A2,IEC 60335-1:2010/AMD2:2016, Dekra BS EN/ EN 60335-1:2012+A11+A13+A1+A14+A2+A15 ,EAC TP TC 004 approved
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
ParameterStandardTest Level
Conducted emissionBS EN/EN55011 (CISPR11)Class B
Radiated emissionBS EN/EN55011 (CISPR11)Class B
Harmonic currentBS EN/EN61000-3-2Class A
Voltage flickerBS EN/EN61000-3-3
EMC IMMUNITYNote.9

BS EN/EN55035, BS EN/EN60601-1-2

ParameterStandardTest Level
ESDBS EN/EN61000-4-2Level 4, 15KV air; Level 4, 8KV contact
RF field susceptibilityBS EN/EN61000-4-3Level 3, 10V/m( 80MHz~2.7GHz ) Table 9, 9~28V/m( 385MHz~5.78GHz )
EFT burstsBS EN/EN61000-4-4Level 3, 2KV
Surge susceptibilityBS EN/EN61000-4-5Level 3, 1KV/Line-Line
Conducted susceptibilityBS EN/EN61000-4-6Level 3, 10V
Magnetic field immunityBS EN/EN61000-4-8Level 4, 30A/m
Voltage dip, interruptionBS EN/EN61000-4-11100% dip 1 periods, 30% dip 25 periods, 100% interruptions 250 periods

OTHERS

MTBF
7319.8K hrs min. Telcordia SR-332 (Bellcore) ; 1210.1K hrs min. MIL-HDBK-217F (25℃)
DIMENSION
49*23.8*23mm (L*W*H) or 1.93 ″*0.94″*0.91″ inch
PACKING
0.028Kg; 200pcs/6.6Kg/0.94CUFT
Test conditions and notes9
  1. 1. All parameters NOT specially mentioned are measured at 230VAC input, rated load and 25℃ of ambient temperature.
  2. 2. No minimum load required.
  3. 3. 33% Duty cycle maximum within every 30 seconds. Average output power should not exceed the rated power.
  4. 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. 5. Tolerance : includes set up tolerance, line regulation and load regulation.
  6. 6. Derating may be needed under low input voltages. Please check the derating curve for more details.
  7. 7. Touch current was measured from primary input to DC output.
  8. 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. 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-20-3.3 Derating Curve
Derating Curve
MFM-20-3.3 Mechanical Specification
Mechanical Specification

Typical applications

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

Downloads

FAQ

Can I use the MFM-20-3.3 for 3.3V embedded processors or logic boards?

Yes, this model is a constant voltage 3.3V supply with up to 4.5A output, which suits embedded processors, logic boards, and digital control electronics that require a regulated 3.3V rail. Note that its rated power at 3.3V is 14.9W, not 20W, so the total load must stay within 4.5A and 14.9W.

Is the MFM-20-3.3 a good fit for industrial communication or I/O boards that run on 3.3V?

It can be a practical choice for industrial communication modules and 3.3V I/O boards because it provides 3.3V constant voltage at up to 4.5A. The wide 80-264VAC input also helps when the same design needs to accept common AC mains ranges.

Can this power supply support compact automation electronics that need more current at 3.3V?

Yes, the available 4.5A output is useful when a 3.3V automation board or embedded assembly needs a higher-current 3.3V rail. The PCB type construction and 49.0 x 23.8 x 23.0 mm size also favor compact equipment layouts.

Will the MFM-20-3.3 work in harsh temperature conditions?

Its operating temperature range is -35C to +85C, with output derating required at higher ambient temperatures (see the derating curve), inside protected equipment. No IP rating is listed, so temperature capability should not be treated as outdoor weather protection.

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View all 26 MFM Series models
Mean Well MFM-20-3.3 Power Supply 20W 3.3V 4.5A - MFM-20-3.3 - powersupplymall.com
Mean Well

Mean Well MFM-20-3.3 Power Supply 20W 3.3V 4.5A

$14.02 USD

MFM-20-3.3 is the 3.3V output model of this series: rated current 4.5A, rated power 14.9W, typical efficiency 81%.

MFM-20 is a 20 W high density and small size ( 49 *2 3 . 8 * 23 mm) AC/DC o n boa r d type medical power supply series. It features the operation for 80~ 264 VAC, a low no load power consumption less than 0. 1 W , a high efficiency up to 87 %, 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

  • 1.93"x0.94" 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<0.1W
  • Extremely low leakage current
  • Wide operating temp. range -35 ~ +85℃
  • EMI class B for class Ⅱ configuration
  • Protections: Short circuit / Overload / Over voltage / Over temperature
  • No minimum load required
  • 3 years warranty

Typical applications

  • Portable medical device
  • Mobile clinical workstation
  • Medical computer monitor
  • Medical examination instrument
View product

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