NFS25 Series
D u a l a n d t r i p l e o u t p u t
LOW TO MEDIUM POWER AC/DC POWER SUPPLIES 25W AC/DC Universal Input Switch Mode Power Supplies
1
• 5.0 x 3.0 x 1.2 inch package (1U applications)
• Industry standard package
• Overvoltage and short circuit protection
• 25W with free air convection cooling
• EN55022, EN55011 conducted emissions level A
• UL, VDE and CSA safety approvals
The NFS25 series is a 25W universal input AC/DC power supply on a 5 x 3 inch card
with a maximum component height of 1.2 inches for use in 1U applications. The NFS25
series is available with a wide range of models in the industry standard 5 x 3 inch
footprint and has proven itself to be reliable and versatile product for a wide range of
communication and industrial applications. The NFS25 provides 25W of output power
with free air convection cooling which can be boosted to 30W with 20CFM of air.
Standard features include OVP and short circuit protection. The series, with full
international safety approval and the CE mark, meets conducted emissions EN55022
level A. The NFS25 series is designed for use in low power data networking, computer,
telecom and industrial applications such as wireless switchers, hubs, POS terminals,
PABX’s and machine control. This list is not exclusive as the generic feature of the
series with industry standard output configurations provide a solution for most high
volume applications including many industrial applications.
2 YEAR WARRANTY
All specifications are typical at nominal input, full load at 25°C unless otherwise stated
SPECIFICATIONS
OUTPUT SPECIFICATIONS
EMC CHARACTERISTICS
Conducted emissions
Radiated emissions
ESD air
EN55022, FCC part 15
Level A
Level A
Output power
(See Note 2)
Continuous
Peak (60s)
25W
35W
EN55022, FCC part 15
EN61000-4-2, level 3
EN61000-4-2, level 4
EN61000-4-5, level 3
EN61000-4-4, level 3
EN61000-4-3, level 3
EN61000-4-6, level 3
Perf. criteria 1
Perf. criteria 1
Perf. criteria 1
Perf. criteria 1
Perf. criteria 2
Perf. criteria 1
ESD contact
Line regulation
LL to HL, FL
Main output (Output 1)
Output 2
Output 3
±0.2% max.
±1% max.
±0.2% max.
Surge
Fast transients
Radiated immunity
Conducted immunity
Total regulation
(See Notes 4, 5)
Main output (Output 1)
Auxiliary output 2
Auxiliary output 3
±2.0% max.
see table
GENERAL SPECIFICATIONS
see table
Hold-up time
110VAC input
16ms
80ms
Overshoot/undershoot
Transient response
At turn-on
0%
230VAC input
+5V
(1.5 to 3A step)
±120mV max. dev.
500µs recovery
Efficiency
25W output
70% typical
Isolation voltage
Input/output
Input/chassis
3000VAC
1500VAC
Temperature coefficient All outputs
±0.02% /°C max.
6.25V ±0.75V
Switching frequency
Variable
Overvoltage protection
Output power limit
+5V output
Approvals and
standards
(See Note 10)
IEC950, IEC1010, EN60950
UL1950, VDE0805
Primary power
limited
60W Pin limit max.
35W Pout limit min.
CSA C22.2 No. 950
Short circuit protection
INPUT SPECIFICATIONS
Input voltage range
Continuous
Weight
280g (9.6oz)
MTBF (See Note 9)
MIL-HDBK-217E, 25°C 170,000 hours
Universal input
85 to 264VAC
120 to 370VDC
ENVIRONMENTAL SPECIFICATIONS
Thermal performance
(See Notes 6, 7, 8)
0°C to 50°C ambient,
25W max.
Input frequency range
Input surge current
47 to 440Hz
convection cooled
50°C to +70°C ambient
convection cooled
Peak (0°C to +50°C,
max. 60 seconds)
Non-operating
Derate to
50% load
35W
110VAC, cold start
230VAC, cold start
15A max.
32A max.
Safety ground
leakage current
132VAC, 60Hz
264VAC, 50Hz
0.62mA max.
1mA max.
–40°C to +85°C
5% to 95% RH
Relative humidity
Altitude
Non-condensing
Operating
Non-operating
10,000 feet max.
30,000 feet max.
Vibration
Random vibration
Three orthogonal axes
10 min. test per axis
2.4G rms approx.
5Hz to 500Hz
File Name: NFS25.PDF Rev: 01 Jan 2000