Ferrule — FWX 250V (UL): 1-50A

FWX (14 x 51mm)

Specifications

Description:

Ferrule style high

speed fuses.

Dimensions:

See dimensions

illustration.

Ratings:

Volts: — 250Vac/dc

Amps: — 1-50A

IR: — 200kA RMS Sym.

— 50kA @ 250Vdc

Agency Information:

CE, UL Recognition 1-50A & CSA

Component Acceptance: 5-30A

Electrical

Characteristics

rated voltage and at power

factor of 15% are given in

the electrical

characteristics. For other

found by multiplying by

correction factor, K, given

as a function of applied

working voltage, Eg, (rms).

Dimensions - mm (inches)

50.8

(2.000")

15.5

(0.610")

14.3

(0.563")

Arc Voltage

This curve gives the

peak arc voltage, UL,

which may appear

across the fuse during

its operation as a

function 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

characteristics. 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

Size

RMS-Amps

Pre-arc

at 250V

Loss

FWX-1A14F

1

—

—

—

FWX-2A14F

2

—

—

—

FWX-3A14F

3

—

—

—

FWX-4A14F

4

—

—

—

FWX-5A14F

14 x 51mm

5

1.6

13

1.3

FWX-10A14F

10

3.6

24

3.4

FWX-15A14F

15

14

83

3.8

FWX-20A14F

20

33

200

4.6

FWX-25A14F

25

58

300

5.3

FWX-30A14F

30

100

500

5.9

FWX-50A14F

50

200

1800

5.7

• Watts loss provided at rated current.

• (250Vdc/Interrupting rating 50kA) UL Recognition & CSA Component Acceptance on 5

through 30A only. Consult Cooper Bussmann for additional ratings.

• See accessories on page 216.

Features and Benefits

• Excellent cycling capability and DC performance

• Low watts loss in a compact size

• Used with finger-safe holders/blocks

Typical Applications

• DC common bus

• DC drives

• Power converters/rectifiers

• Reduced voltage starters

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)

1.0

0.8

0.4

0.5

0.6

0.3

0.2

0.1

30 40 50

60

70

80 90 100%

I

b

Data Sheet: 720006

For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa

199

High Speed Fuses