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Mean Well NFM-20-24 Power Supply 20W 24V 920mA
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NFM-20-24 is the 24V output model of this series: rated current 0.92A, rated power 22.08W, typical efficiency 84%.
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
OUTPUT
- DC VOLTAGE
- 24V
- RATED CURRENT
- 0.92A
- CURRENT RANGE
- 0 ~ 0.92A
- RATED POWER
- 22.08W
- RIPPLE & NOISE (max.)Note.2
- 240mVp-p
- VOLTAGE ADJ. RANGE
- 21.6 ~ 26.4V
- 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.)
- 84%
- 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
- 27.6 ~ 32.4V 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. 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 0.1uf & 47uf 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 http://www.meanwell.com)
- 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. Touch current was measured from primary input to DC output.
- 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
Downloads
FAQ
Can I use the NFM-20-24 for a 24V industrial controller or compact automation device?
It provides constant 24V output up to 0.92A with a 22.08W rating. That fits smaller 24V automation electronics and controller loads that stay within those electrical limits.
Is the NFM-20-24 suitable for 24V monitoring, signaling, or interface hardware?
Yes, for 24V DC loads that require no more than 0.92A. Its constant-voltage output is appropriate for low-power 24V interface equipment rather than higher-current devices.
Can this 24V model be used in embedded or IT systems that run from AC input and need 24V DC?
It can be used where the downstream electronics need 24V constant-voltage power and remain within 22.08W. The 85-264VAC input range also supports use across a broad range of AC mains conditions.
Is the NFM-20-24 appropriate for outdoor installations?
The operating temperature range is specified as -20°C to +60°C. The provided specs do not include an IP rating, which means outdoor or water-exposed suitability is not established by the listed data.
How does the NFM-20-24 compare with other NFM family members?
In the 24V branch of the provided sibling list, NFM-05-24 is 5.52W at 24V and 0.23A, NFM-10-24 is 10.08W at 24V and 0.42A, NFM-15-24 is 15.12W at 24V and 0.63A, and this NFM-20-24 is 22.08W at 24V and 0.92A. The broader family also includes NFM-05-3.3 at 4.125W, 3.3V, 1.25A; NFM-05-5 at 5W, 5V, 1A; NFM-05-12 at 5.04W, 12V, 0.42A; NFM-05-15 at 4.95W, 15V, 0.33A; NFM-10-3.3 at 8.25W, 3.3V, 2.5A; NFM-10-5 at 10W, 5V, 2A; NFM-10-12 at 10.2W, 12V, 0.85A; NFM-10-15 at 10.05W, 15V, 0.67A; NFM-15-3.3 at 11.5W, 3.3V, 3.5A; NFM-15-5 at 15W, 5V, 3A; NFM-15-12 at 15W, 12V, 1.25A; NFM-15-15 at 15W, 15V, 1A; NFM-20-3.3 at 14.85W, 3.3V, 4.5A; NFM-20-5 at 22W, 5V, 4.4A; NFM-20-12 at 21.6W, 12V, 1.8A; and NFM-20-15 at 21W in the provided data. Within the listed 24V models, this is the highest-output option.
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Other NFM-20 Models
3 other models| Model | Power | Voltage | Current | |
|---|---|---|---|---|
| Mean Well NFM-20-5 Power Supply 20W 5V 4.4A | 22W | 5V | 4.4A | View |
| Mean Well NFM-20-3.3 Power Supply 20W 3.3V 4.5A | 14.85W | 3.3V | 4.5A | View |
| Mean Well NFM-20-12 Power Supply 20W 12V 1.8A | 21.6W | 12V | 1.8A | View |
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