Form No.

Page 2 of 2

BIF Doc #720031

The only controlled copy of this BIF document is the electronic read-only version located on the Bussmann Network Drive. All other copies of this document are by definition uncontrolled.

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.

Square Body – Flush End Contact

1250V/1300V (IEC/U.L.)

50-1400A

The total clearing I

at power factor of 15% are given in the

electrical characteristics. For other volt-

ages, the clearing I

plying by correction factor, K , given as

a function of applied working voltage,

Arc Voltage

This curve gives the peak arc voltage,

during its operation as a function of the

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

is given as a function of the RMS load

Electrical Characteristics

A

B

D

E

E

H

G

F

Size

Type

A

B

D

E

F

GH

1*

BKN + GKN/75

74

75

59

45

M8

fiΩ¡§∑ - 18 UNC-2B

5

Ø17

1*

BKN/80

80

81

59

45

M8

5

Ø17

1

BKN + GKN/75

74

75

69

53

M8

fiΩ¡§∑ - 18 UNC-2B

8

Ø20

1

BKN/80

80

81

69

53

M8

8

Ø20

2

BKN + GKN/75

74

75

77

61

M10

‹Ω•∑ - 16 UNC-2B

10

Ø24

2

BKN/80

80

81

77

61

M10

10

Ø24

2

BKN + GKN/90

80

91

77

61

M10

‹Ω•∑ - 16 UNC-2B

10

Ø24

3

BKN + GKN/75

74

76

92

76

M12

⁄Ω™∑ - 13 UNC-2B

10

Ø30

3

BKN/80

81

83

92

76

M12

10

Ø30

3

BKN + GKN/90

81

91

92

76

M12

⁄Ω™∑ - 13 UNC-2B

10

Ø30

Dimension in mm.

1mm = 0.0394∑

1∑ = 25.4mm

Dimensions

Flush End Contact: Type -BKN/-, -GKN/-

K

1.5

1.0

1.25

0.5

0.4

0.3

0.2

400

600

800

1000 1200

1400

E

g

UL

3

2.5

8

10

3

1.4

1.8

6

4

5

3

400

600

800

1000 1200 1400

E

g

30 40 50

60

70

80 90 100%

I

b

1.0

0.8

0.4

0.5

0.6

0.3

0.2

0.1

- - - - - -

Dashed lines apply to the following amperages:

Size

1*

1

2

3

Amp

400

500-630

630-1000

800-1400

®

7-11-01

SB01191

R

¥