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2

Thermal Overcurrent Circuit Breaker 157

1646

1

The time/current characteristic curve depends on the ambient temperature

prevailing. In order to eliminate nuisance tripping, please multiply the

circuit breaker current ratings by the derating factor shown below. See also

section Technical information.

Ambient temperature °F

°C

-4

-20

+14

-10

+32

0

+73.4

+23

+104

+40

+122

+50

+140

+60

Derating factor

0.76 0.84

0.92

1

1.08

1.16

1.24

12

46 8102040

... times rated current

0.05 - 2.7 A

2.8 - 23 A

10000

1000

100

10

1

0.1

25 A

Dimensions

Typical time/current characteristics at +23 °C/+73.4 °F

Installation drawings

Internal connection diagram

flat head screw M4x6 ISO 1580

tightening torque max. 1.2 Nm

tightening torque max. 1 Nm

3/8-27UNS-2 A

19.8

blade terminals

DIN 46244-A6.3-0.8

(QC .250)

ø4

31

mounting hole

.780

.157

1.22

157-P10

157-K10

1

2

1

operating area

mounting area

.039

This is a metric design and millimeter dimensions take precedence ( mm )

inch