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Mean Well

Mean Well NFM-20-12 Power Supply 20W 12V 1.8A

SKU NFM-20-12
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End of Life, Succeeded by MFM-20-12
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Overview

NFM-20-12 is the 12V output model of this series: rated current 1.8A, rated power 21.6W, typical efficiency 81%.

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-20-12Specifications from the official datasheet (2022-09-20 edition)

OUTPUT

DC VOLTAGE
12V
RATED CURRENT
1.8A
CURRENT RANGE
0 ~ 1.8A
RATED POWER
21.6W
RIPPLE & NOISE (max.)Note.2
150mVp-p
VOLTAGE ADJ. RANGE
10.8 ~ 13.2V
VOLTAGE TOLERANCENote.3
±1.0%
LINE REGULATION
±0.5%
LOAD REGULATION
±0.5%
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.)
81%
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
13.8 ~ 16.2V 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-20-12 Mechanical Specification
Mechanical Specification
NFM-20-12 Block Diagram
Block Diagram
NFM-20-12 Derating Curve
Derating Curve

Downloads

FAQ

Can I use the NFM-20-12 for a 12V PLC accessory or industrial control module?

It delivers constant 12V output up to 1.8A with a 21.6W rating. That suits small 12V automation electronics, control accessories, and similar DC loads that stay within those limits.

Is the NFM-20-12 suitable for 12V sensors, relays, or monitoring equipment?

Yes, if the connected 12V load requires no more than 1.8A. Its constant-voltage output is intended for electronics that need a stable 12V rail rather than a constant-current source.

Can this model power 12V embedded or IT hardware inside a compact device?

It can fit 12V embedded equipment that remains within 21.6W and 1.8A. The 85-264VAC input range also supports deployments where AC mains may vary from site to site.

Is the NFM-20-12 suitable for outdoor use or wide-temperature indoor equipment?

The specified operating range is -20°C to +60°C, which defines its temperature capability for equipment operation. No IP rating is listed in the provided specs, so outdoor or sealed-enclosure suitability is not confirmed by the data here.

How does the NFM-20-12 compare to the rest of the NFM series?

For 12V options in the provided sibling list, NFM-05-12 is 5.04W at 12V and 0.42A, NFM-10-12 is 10.2W at 12V and 0.85A, NFM-15-12 is 15W at 12V and 1.25A, and this NFM-20-12 is 21.6W at 12V and 1.8A. Other siblings listed are NFM-05-3.3 at 4.125W, 3.3V, 1.25A; NFM-05-5 at 5W, 5V, 1A; NFM-05-15 at 4.95W, 15V, 0.33A; NFM-05-24 at 5.52W, 24V, 0.23A; NFM-10-3.3 at 8.25W, 3.3V, 2.5A; NFM-10-5 at 10W, 5V, 2A; NFM-10-15 at 10.05W, 15V, 0.67A; NFM-10-24 at 10.08W, 24V, 0.42A; NFM-15-3.3 at 11.5W, 3.3V, 3.5A; NFM-15-5 at 15W, 5V, 3A; NFM-15-15 at 15W, 15V, 1A; NFM-15-24 at 15.12W, 24V, 0.63A; NFM-20-3.3 at 14.85W, 3.3V, 4.5A; NFM-20-5 at 22W, 5V, 4.4A; NFM-20-15 at 14.85W in the provided data; and NFM-20-24 at 22.08W, 24V, 0.92A. Within the 12V subset, this is the highest-output model listed.

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Mean Well

Mean Well NFM-20-12 Power Supply 20W 12V 1.8A

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NFM-20-12 is the 12V output model of this series: rated current 1.8A, rated power 21.6W, typical efficiency 81%.

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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