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Mean Well

Mean Well NFM-20-5 Power Supply 20W 5V 4.4A

SKU NFM-20-5
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Overview

NFM-20-5 is the 5V output model of this series: rated current 4.4A, rated power 22W, typical efficiency 75%.

Features

  • Universal AC input / Full range
  • Protections: Short circuit / Overload / Over voltage / Over temperature
  • Ultra-miniature size, light weight
  • Cooling by free air convection
  • Medical safety approved (2 x MOPP between primary to secondary)
  • No load power consumption<0.75W
  • 100% full load burn-in test
  • Optional on-board type version available
  • Fixed switching frequency at 90KHz
  • High reliability
  • Suitable for BF application with appropriate system consideration
  • 3 years warranty

Specifications

NFM-20-5Specifications from the official datasheet (2022-09-20 edition)

OUTPUT

DC VOLTAGE
5V
RATED CURRENT
4.4A
CURRENT RANGE
0 ~ 4.4A
RATED POWER
22W
RIPPLE & NOISE (max.)Note.2
80mVp-p
VOLTAGE ADJ. RANGE
4.5 ~ 5.4V
VOLTAGE TOLERANCENote.3
±2.0%
LINE REGULATION
±1.0%
LOAD REGULATION
±1.5%
SETUP, RISE TIME
500ms, 20ms/230VAC 500ms, 20ms/115VAC at full load
HOLD UP TIME (Typ.)
50ms/230VAC 15ms/115VAC at full load

INPUT

VOLTAGE RANGE
85 ~ 264VAC 120 ~ 370VDC
FREQUENCY RANGE
47 ~ 440Hz
EFFICIENCY (Typ.)
75%
AC CURRENT (Typ.)
0.6A/115VAC 0.4A/230VAC
INRUSH CURRENT (Typ.)
COLD START 30A/115VAC 65A/230VAC
LEAKAGE CURRENTNote.6
Earth leakage current < 300μ A/264VAC , Touch current < 100μ A/264VAC

PROTECTION

OVERLOAD
Above 105% rated output power Protection type : Hiccup mode, recovers automatically after fault condition is removed
OVER VOLTAGE
5.75 ~ 6.75V Protection type : Shut off o/p voltage, clamping by zener diode
OVER TEMPERATURENote.5
Shut down o/p voltage, recovers automatically after temperature goes down

ENVIRONMENT

WORKING TEMP.
-20 ~ +60℃ (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, 2G 10min./1cycle, period for 60min. each along X, Y, Z axes

SAFETY & EMC

SAFETY STANDARDS
ANSI/AAMI ES60601-1,TUV EN60601-1, IEC60601-1, EAC TP TC 004 approved
ISOLATION LEVEL
Primary-Secondary: 2xMOPP, Primary-Earth:1xMOPP, Secondary-Earth:1xMOPP
WITHSTAND VOLTAGE
I/P-O/P:4KVAC I/P-FG:2KVAC O/P-FG:1.5KVAC
ISOLATION RESISTANCE
I/P-O/P, I/P-FG, O/P-FG:100M Ohms / 500VDC / 25℃/ 70% RH
EMC EMISSION
Compliance to EN55011(CISPR11),EN55032 (CISPR32) Class B, EN61000-3-2,-3, EAC TP TC 020
EMC IMMUNITY
Compliance to EN61000-4-2,3,4,5,6,8,11, EN55035, EN60601-1-2, EN61204-3, medical level, EAC TP TC 020

OTHERS

MTBF
487.8Khrs min. MIL-HDBK-217F (25℃)
DIMENSION
89*51*19.3mm (L*W*H)
PACKING
0.09Kg; 105pcs/10.5Kg/0.94CUFT
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 0.1uf & 47uf 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. The over temperature protection (OTP) is the built-in function of the control IC (U1). The activating level described above is based on the specification provided by the IC manufacturer.
  6. 6. Touch current was measured from primary input to DC output.
  7. 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

NFM-20-5 Mechanical Specification
Mechanical Specification
NFM-20-5 Block Diagram
Block Diagram
NFM-20-5 Derating Curve
Derating Curve

Downloads

FAQ

Can I use the NFM-20-5 for a 5V single-board computer or embedded controller?

Yes, if the load requires constant 5V and stays within 4.4A and 22W. That makes it suitable for 5V embedded computing or control hardware that needs more current than smaller 5V supplies provide.

Is the NFM-20-5 suitable for 5V automation electronics inside a control cabinet?

It is designed for constant-voltage 5V output with up to 4.4A available. For PLC accessory boards, small logic assemblies, or 5V control electronics that remain under 22W, the electrical rating is aligned with that use.

Can this model power multiple 5V industrial interface boards from one supply?

It can when the combined requirement remains at 5V and does not exceed 4.4A or 22W. Compared with lower-power 5V models in the same family, this version gives more headroom for grouped low-voltage loads.

Would the NFM-20-5 work for compact IT or embedded peripherals that need regulated 5V?

Yes, it is intended for constant 5V loads and accepts 85-264VAC input. If the peripherals together stay within 4.4A and 22W, the model is sized for that kind of regulated low-voltage use.

How does the NFM-20-5 compare with other NFM models?

Among the 5V versions, the range goes from NFM-05-5 at 5W and 1A to NFM-10-5 at 10W and 2A, NFM-15-5 at 15W and 3A, and this NFM-20-5 at 22W and 4.4A. The broader NFM family also includes 3.3V models from 4.125W and 1.25A to 14.85W and 4.5A, 12V models from 5.04W and 0.42A to 21.6W and 1.8A, 15V models from 4.95W and 0.33A to 15W and 1A plus NFM-20-15 listed at 14.85W, and 24V models from 5.52W and 0.23A to 22.08W and 0.92A.

Is the NFM-20-5 meant for indoor equipment or exposed environments?

The listed operating temperature range is -20°C to +60°C, which supports use in a broad equipment temperature window. No IP rating is provided in the specs, so exposed outdoor or washdown use is not established by this product data.

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Mean Well NFM-20-5 Power Supply 20W 5V
Mean Well

Mean Well NFM-20-5 Power Supply 20W 5V 4.4A

Log in to see price

NFM-20-5 is the 5V output model of this series: rated current 4.4A, rated power 22W, typical efficiency 75%.

Features

  • Universal AC input / Full range
  • Protections: Short circuit / Overload / Over voltage / Over temperature
  • Ultra-miniature size, light weight
  • Cooling by free air convection
  • Medical safety approved (2 x MOPP between primary to secondary)
  • No load power consumption<0.75W
  • 100% full load burn-in test
  • Optional on-board type version available
  • Fixed switching frequency at 90KHz
  • High reliability
  • Suitable for BF application with appropriate system consideration
  • 3 years warranty
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