High Speed Fuses

For product data sheets, visit www.cooperbussmann.com/products/datasheet.asp

95

North American — FWX 250V: 35-2500A

FWX

Specifications

Description:

North American

style stud-mount and flush-end

fuses.

Dimensions:

See Dimensions

illustrations.

Ratings:

Volts: — 250Vac

Amps: — 35-2500A

IR: — 200kA RMS Sym.

Agency Information:

CE, UL Recognized & CSA

Component Acceptance on 35-800A fuses (20kA IR

@250Vdc).

Electrical

Characteristics

voltage and at power factor

of 15% are given in the

electrical characteristics.

For other voltages, the

plying by correction factor,

K, given as a function of

applied working voltage, Eg,

(rms).

Arc Voltage

This curve gives the peak

arc voltage, UL, which may

appear across the fuse dur-

ing its operation as a func-

tion of the applied working

voltage, Eg, (rms) at a

power factor of 15%.

Power Losses

Watts loss at rated current is

given in the electrical char

acteristics. The curve allows

the calculation of the power

losses at load currents lower

than the rated current . The

correction factor, Kp , is

given as a function of the

RMS load current, Ib , in %

of the rated current .

Catalog Numbers

Electrical Characteristics

Rated

I

Catalog

Current

Clearing

Watts

Number

RMS-Amps

Pre-arc

at 250V

Loss

FWX-35A

35

50

230

4.2

FWX-40A

40

60

310

5.2

FWX-45A

45

80

390

5.7

FWX-50A

50

100

520

6.0

FWX-60A

60

140

740

8.1

FWX-70A

70

330

1400

7.2

FWX-80A

80

430

1850

8.1

FWX-90A

90

570

2450

9.0

FWX-100A

100

740

3150

10.0

FWX-125A

125

1130

4850

12.5

FWX-150A

150

1620

6950

15.7

FWX-175A

175

2170

9300

18.5

FWX-200A

200

2790

12000

22

FWX-225A

225

3210

14700

24

FWX-250A

250

3960

18100

27

FWX-275A

275

4720

21600

31

FWX-300A

300

6000

27300

32

FWX-350A

350

10600

48600

39

FWX-400A

400

14500

66100

44

FWX-450A

450

22100

101000

49

FWX-500A

500

28000

128000

54

FWX-600A

600

41100

188000

62

FWX-700A

700

48800

190000

72

FWX-800A

800

59000

230000

84

FWX-1000AH

1000

44000

360000

100

FWX-1200AH

1200

92000

750000

103

FWX-1500AH

1500

120000

880000

140

FWX-1600AH

1600

160000

1200000

140

FWX-2000AH

2000

320000

2300000

151

FWX-2500AH

2500

670000

4700000

163

• Watts loss provided at rated current.

• See accessories on page 106.

Features and Benefits

• Excellent dc performance

• Low arc voltage and low

• Superior cycling capability

1.0

0.8

0.4

0.5

0.6

0.3

0.2

0.1

30 40 50

60

70

80 90 100%

I

b

1.5

1.0

0.5

0.3

0.2

0.15

75

125

300

200

250

K

1)

2)

1.4

1.2

800

600

500

400

300

200

50

100

150

200

250

1)

2)

1) 35-800A Range

2) 1000-2500A Range

1) 35-800A Range

2) 1000-2500A Range

A

E

DC

F

J

G

B

H

A

B

C

A

B

C

D

Fig. 1:

35-800A

Fig. 2:

1000-1200A

Fig. 3:

1500-2500A

Dimensions (in)

Tapped

Amp

Thread

Range

Fig. A

B

C

D

E

F

G

H

J

Depth

35-60

1

3.19 0.81 1.59 2.59 2.25 0.34 0.63 0.13 0.52 —

70-200

1

3.13 1.22 1.59 2.44 2.19 0.34 1.00 0.19 0.47 —

225-600

1

3.84 1.50 1.59 2.94 2.25 0.41 1.00 0.25 0.75 —

700-800

1

3.84 2.00 1.59 3.03 2.28 0.41 1.50 0.25 0.78 —

1000-1200

2

2.59 3.00 1.50 —

—

—

—

—

—

3

1500-2500

3

2.59 3.50 1.50 1.50 —

—

—

—

—

3

1mm = 0.0394” / 1” = 25.4mm

Typical Applications

• DC common bus

• DC drives

• Power converters/rectifiers

• Reduced voltage starters