Notes

1

Convection cooled, maximum 40W output power.

2

Peak outputs lasting less than 30 seconds with duty factor less than 10%.

During peak loading, output may go outside total regulation limits.

Maximum output power during peak loading is 50W.

3

Forced air, 20 CFM at 1 atmosphere. Total power out, 50W maximum.

4

Figure is peak-to-peak. Output noise measurements are across a 50MHz

bandwidth made using a 12 inch twisted pair, terminated with a 47µF

capacitor.

5

Total regulation is defined as the static output regulation at 25°C, including

initial tolerance, line voltage within stated limits and output voltages

adjusted to their factory settings. Also, for stated regulation:

NFS42-7608 : 0.25

≤ x ≤ 5

NFS42-7627 : 0.50

≤ x ≤ 12

Where x =

—

NFS42-7610 : 0.30

≤ x ≤ 12

6

Derating curve is application specific for ambient temperatures >50°C, for

7

Caution: Allow a minimum of 1 second after disconnecting the power

when making thermal measurements.

8

Artesyn Technologies recommends a minimum load of 4 Watts to achieve

the design MTBF.

9

Three orthogonal axes, random vibration, 10 minute test for each axis.

10 This product is only for inclusion by professional installers within other

equipment and must not be operated as a stand alone product.

ALL DIMENSIONS IN INCHES (mm)

Maximum component height is 1.50 (38.10 mm)

3.15

(80.01)

0.40

(10.16)

4.80

(121.92)

3.90

(99.06)

0.75

(19.05)

6.30

(160.02)

J2

J3

J4

J1

E1

0.156 (3.962) Dia. 4 Places

Pin 1

Pin 1

Pin 1

1

2

0

°C

10

°C

20

°C

30

°C

40

°C

50

°C

60

°C

70

°C

20W

40W

Output Power (Watts)

4W MIN. LOAD REQUIRED TO ACHIEVE DESIGN MTBF

50W

4W

20 CFM FORCED AIR COOLING

25W

NATURAL

CONVECTION

COOLING

AC mating connector

Molex type 09-50-3031 or equivalent with 2878 series or equivalent crimp

terminal.

DC mating connector

The NFS42 uses three 4-pin paralleled connectors with 0.098 inch pin spacing.

Each pin is rated at 2.5 amps. The manufacturer suggests, that for each output,

all three paralleled pins be used to minimise the current contribution of each.

Lowering the current delivered through each pin improves output regulation and

reduces pin heating which improves connector long term reliability.

Artesyn Technologies recommends, as the DC mating connector, a fourteen pin

housing placed over all twelve pins simultaneously. This connector is available

with polarising rib to prevent left or right pin misalignment. The relevant part is

Molex type is 22-01-1143 or equivalent with associated crimp terminal 08-50-

0114 or equivalent.

Mechanical notes

A

A standard L-bracket and cover is available for mounting which contains

all screws, connectors and necessary mounting hardware. Details are on

page 83. Order part number ‘NFS50 COVER KIT’.

40 to 50 Watt

AC/DC universal input switch mode power supplies

LOW TO MEDIUM POWER AC/DC POWER SUPPLIES

|

40-50W AC/DC

PAGE 2

http://www.artesyn.com

PIN CONNECTIONS

J1

NFS42-7608

NFS42-7627

NFS42-7610

Pin 1

AC Neutral

AC Neutral

AC Neutral

Pin 2

AC Line

AC Line

AC Line

J2, J3, J4

Pin 1

–12V

–12V

–15V

Pin 2

+12V

+24V

+15V

Pin 3

Return

Return

Return

Pin 4

+5.1V

+5.1V

+5.1V

E1

Ground

Ground

Ground

OUTPUT

OUTPUT CURRENTS

TOTAL

VOLTAGE

3.0A

5.0A

3.5A

50mV

±3%

NFS42-7608

2.0A

4.0A

2.5A

120mV

±5%

–12.0V

0.2A

0.7A

0.3A

120mV

±5%

2.5A

5.0A

3.5A

50mV

±3%

NFS42-7627

1.0A

3.0A

1.2A

240mV

±5%

–12.0V

0.2A

0.7A

0.3A

120mV

±5%

2.5A

5.0A

3.5A

50mV

±3%

NFS42-7610

1.6A

3.0A

2.0A

150mV

±5%

–15.0V

0.2A

0.7A

0.3A

150mV

±5%

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.