Bussmann FWP Data Sheet

7-18-01

SB01191

Form No. FWP

Page 1 of 1

BIF Doc #720026

Bussmann

®

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This bulletin is intended to clearly present comprehensive product data and provide technical information that will help the end user with design applications. Bussmann reserves the right,
without notice, to change design or construction of any products and to discontinue or limit distribution of any products. Bussmann also reserves the right to change or update, without
notice, any technical information contained in this bulletin. Once a product has been selected, it should be tested by the user in all possible applications.

®

Ferrule

FWP 660V/700V (IEC/U.L.) 20-100A

Dimensions

K

1.4

1.2

1.0

0.6

0.8

0.7

0.9

0.5

0.4

0.3
200 300 400 500 600 700

E

g

U

L

1.4

1.2
10

3

6

8
7

9

5
4

3

200 300 400 500 600 700

E

g

Kp

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

58.0

(2.283")

15.0

(0.591")

22.2

(0.875")

Electrical Characteristics Ordering Information Dimensions Curves

Rated

I

2

t (A2S)

Carton

Current Clearing Watts Part Carton Weight Figure

Size RMS-Amps Pre-arc at 660V Loss Number Qty. (kg) Number BIF #

20 23 260 4.6 FWP-20A22F
25 37 410 5.6 FWP-25A22F
32 55 605 7.0 FWP-32A22F

22 ≈ 58mm 40 68 750 8.5 FWP-40A22F

10 0.450 Fig. 1 35785291

(‡Ω•∑) 50 155 1600 9.5 FWP-50A22F

63 280 3080 11 FWP-63A22F
80 600 6600 13.5 FWP-80A22F

100 1100 12500 16 FWP-100A22F

n Interrupting rating 200kA RMS Symmetrical. 1 kg = 2.2 lbs. 1 lb = 0.45 kg
n Watts loss provided at rated current.
n (500 Vdc/Interrupting rating 50kA) U.L. Recogition.

Fig. 1: 20-100 Amp Range

Dimension in mm.
1mm = 0.0394∑ 1∑ = 25.4mm

Total Clearing I2t

The total clearing I2t at rated voltage and
at power factor of 15% are given in the
electrical characteristics. For other volt­ages, the clearing I

2

t is found by multi­plying by correction factor, K, given as
a function of applied working voltage,
E

g

, (RMS).

Arc Voltage

This curve gives the peak arc voltage,
U

L

, which may appear across the fuse
during its operation as a function of the
applied working voltage, E

g

, (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, K

p

,
is given as a function of the RMS load
current, I

b

, in % of the rated current .

Electrical Characteristics