OUTPUT SPECIFICATIONS

Output power

Continuous

25W

Peak (60s)

35W

Line regulation

Main output (Output 1)

±0.2%, max.

LL to HL, FL

Output 2

±1%, max.

Output 3

±0.2%, max.

Total regulation

Main output (Output 1)

±2.0%, max.

(See Note 4)

Auxilliary output

see table

Auxilliary output

see table

Overshoot/undershoot

At turn-on

0%

Transient response

+5V

±120mV max. dev.

(1.5 to 3A step)

500µs recovery

Temperature coefficient All outputs

±0.02%/°C, max.

Overvoltage protection

+5V output

6.25V ±0.75V

Output power limit

Primary power

60W Pin limit, max.

limited

35W Pin limit, min.

Short circuit protection

Continuous

INPUT SPECIFICATIONS

Input voltage range

85 to 264VAC

120 to 370VDC

Input frequency range

47 to 440Hz

Input surge current

110VAC, cold start

15A max.

230VAC, cold start

32A max.

Safety ground

132VAC, 60Hz

155µA, max.

leakage current

264VAC, 50Hz

261µA, max.

NFN25 SERIES

Dual and triple output

[ 2 YEAR WARRANTY ]

• 85VAC to 264VAC universal input range

• 120VDC to 370VDC input voltage range

• Fixed frequency operation

• Overvoltage protection (+5V output)

• Meets EN55022 limit B and FCC part 15 limit B line

conducted noise

• VDE, UL and CSA approved

The NFN25 Series of universal input, 25 Watt switching power supplies are

mechanically equivalent to the industry standard NFS40, but are optimised for

operation at lower output power levels.

The NFN25 Series uses an advanced,

fixed frequency design which further reduces the line-conducted noise below

EN55022 and FCC limit B and specifies a much lower leakage current. The

supplies deliver 25W continuous, 35W peak and regulate to zero load. NFN25

Series power supplies are particularly suitable for telecoms applications such as

modems, PABX’s and networking systems.

PAGE 1

ELECTROMAGNETIC COMPATIBILITY SPECIFICATIONS CON’T

Conducted emissions

EN55022, level B

Radiated emissions

EN55022, level B

ESD air

EN61000-4-2, level 3

Perf. criteria 1

ESD contact

EN61000-4-2, level 4

Perf. criteria 1

Surge

EN61000-4-5, level 3

Perf. criteria 1

Fast transients

EN61000-4-4, level 3

Perf. criteria 1

Radiated immunity

EN61000-4-3, level 3

Perf. criteria 2

Conducted immunity

EN61000-4-6, level 3

Perf. criteria 1

GENERAL SPECIFICATIONS

Hold-up time

110VAC input

16ms

230VAC input

80ms

Efficiency

25W output

70% typical

Isolation voltage

Input/output

3000VAC

Input/chassis

1500VAC

Switching frequency

Fixed, 45kHz ±5kHz

Approvals and

IEC950, IEC1010, EN60950

standards

UL1950, VDE0805, BABT

CSA C22.2 No. 950

Weight

280g (9.6oz)

MTBF

MIL-HDBK-217E, 25°C 170,000 hours

ENVIRONMENTAL SPECIFICATIONS

Thermal performance

0°C to 50°C ambient,

25W max.

convection cooled

50°C to +70°C ambient

Derate to

convection cooled

50% load

Peak (0°C to +50°C,

35W

max. 60 seconds)

Non-operating

–40°C to +85°C

Relative humidity

Non-condensing

5% to 95% RH

Altitude

Operating

10,000 feet max.

Non-operating

30,000 feet max.

Vibration

Random vibration

2.4G rms approx.

Three orthogonal axes

5Hz to 500Hz

10 min. test per axis

Data Sheet © Artesyn Technologies® 2000

The information and specifications contained in this data sheet are believed to be correct at

time of publication. However, Artesyn Technologies accepts no responsibility for consequences

arising from printing errors or inaccuracies. Specifications are subject to change without notice.

No rights under any patent accompany the sale of any such product(s) or information contained

herein.