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Mean Well

Mean Well NFM-10-3.3 Power Supply 10W 3.3V 2.5A

SKU NFM-10-3.3
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Overview

NFM-10-3.3 is the 3.3V output model of this series: rated current 2.5A, rated power 8.25W, typical efficiency 66%.

Features

  • Universal AC input / Full range
  • Protections: Short circuit / Overload / Over voltage / Over temperature
  • Ultra-miniature size, light weight
  • Cooling by free air convection
  • Isolation classⅡ
  • Medical safety approved (2 x MOPP between primary to secondary)
  • No load power consumption<0.5W
  • 100% full load burn-in test
  • Fixed switching frequency at 67KHz
  • High reliability
  • Suitable for BF application with appropriate system consideration
  • 3 years warranty

Specifications

NFM-10-3.3Specifications from the official datasheet (2022-09-20 edition)

OUTPUT

DC VOLTAGE
3.3V
RATED CURRENT
2.5A
CURRENT RANGE
0 ~ 2.5A
RATED POWER
8.25W
RIPPLE & NOISE (max.)Note.2
150mVp-p
VOLTAGE ADJ. RANGE
3 ~ 3.63V
VOLTAGE TOLERANCENote.3
±2.0%
LINE REGULATION
±1.0%
LOAD REGULATION
±1.0%
SETUP, RISE TIME
1800ms, 20ms/230VAC 1800ms, 20ms/115VAC at full load
HOLD UP TIME (Typ.)
100ms/230VAC 24ms/115VAC at full load

INPUT

VOLTAGE RANGE
85 ~ 264VAC 120 ~ 370VDC
FREQUENCY RANGE
47 ~ 440Hz
EFFICIENCY (Typ.)
66%
AC CURRENT (Typ.)
0.25A/115VAC 0.15A/230VAC
INRUSH CURRENT (Typ.)
COLD START 25A/115VAC 45A/230VAC
LEAKAGE CURRENTNote.6
Touch current < 80μA/264VAC

PROTECTION

OVERLOAD
Above 105% rated output power Protection type : Hiccup mode, recovers automatically after fault condition is removed
OVER VOLTAGE
3.8 ~ 4.95V Protection type : Shut off o/p voltage, clamping by zener diode
OVER TEMPERATURENote.5
Tj 140℃ typically (U1) detect on main control IC Protection type : Shut down o/p voltage, recovers automatically after temperature goes down

ENVIRONMENT

WORKING TEMP.
-20 ~ +70℃ (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 (Note 4)

SAFETY STANDARDS
ANSI/AAMI ES60601-1,TUV EN60601-1, IEC60601-1, 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
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
723.2Khrs min. MIL-HDBK-217F (25℃)
DIMENSION
65*45*22mm (L*W*H)
PACKING
0.045Kg; 120pcs/6.4Kg/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. The final equipment must be re-confirmed that it still meets EMC directives.
  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-10-3.3 Mechanical Specification
Mechanical Specification
NFM-10-3.3 Block Diagram
Block Diagram
NFM-10-3.3 Derating Curve
Derating Curve

Downloads

FAQ

Can I use the NFM-10-3.3 for a 3.3V embedded controller board?

Yes, it is a constant-voltage 3.3V supply for electronics that require regulated 3.3V power. Its output is rated at 2.5A and 8.25W, which makes it suitable for embedded control boards, logic sections, or communication modules within that load range. The load needs to stay below both the current and power limits.

Is this power supply a fit for 3.3V industrial communication or I/O modules?

It can be used where the module expects a stable 3.3V rail and the total demand does not exceed 2.5A. With 8.25W available, it is aimed at lower-power embedded or automation electronics rather than higher-power peripherals. The 85-264VAC input range supports use across common AC supply ranges.

Can the NFM-10-3.3 power 3.3V sensors and processor logic in one assembly?

It can support combined 3.3V logic and sensor loads as long as the total draw remains within 2.5A and 8.25W. That makes it practical for a compact control assembly where several low-voltage circuits share one regulated rail. It is not intended for loads that require a different output voltage.

Is the NFM-10-3.3 appropriate for outdoor equipment cabinets?

The operating temperature range is -20C to +70C, which covers a wide temperature span for equipment use. However, no IP rating is given in the supplied specs, so the listing does not state outdoor or water-ingress protection. That means outdoor suitability is not established by the product data here.

What is the difference between the NFM 3.3V models in this series?

The listed 3.3V siblings are NFM-05-3.3 at 4.125W and 1.25A, NFM-10-3.3 at 8.25W and 2.5A, NFM-15-3.3 at 11.5W and 3.5A, and NFM-20-3.3 at 14.85W and 4.5A. The NFM-10-3.3 is the second step in that progression. It provides more current than the 5W class model but less than the 15W and 20W versions.

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Mean Well NFM-10-3.3 Power Supply 10W 3.3V
Mean Well

Mean Well NFM-10-3.3 Power Supply 10W 3.3V 2.5A

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NFM-10-3.3 is the 3.3V output model of this series: rated current 2.5A, rated power 8.25W, typical efficiency 66%.

Features

  • Universal AC input / Full range
  • Protections: Short circuit / Overload / Over voltage / Over temperature
  • Ultra-miniature size, light weight
  • Cooling by free air convection
  • Isolation classⅡ
  • Medical safety approved (2 x MOPP between primary to secondary)
  • No load power consumption<0.5W
  • 100% full load burn-in test
  • Fixed switching frequency at 67KHz
  • High reliability
  • Suitable for BF application with appropriate system consideration
  • 3 years warranty
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