4

Thermal-magnetic (TM and AS-line)

AS168XAC2

www.schurter.com /PG20

Circuit Breakers

Symbol

Standard

Rated current

Rated voltage AC

Conditional short circuit

capacity Icn

Rated voltage DC

Conditional short circuit

capacity Icn

UL 508

CSA C22.2 no. 14

0.5 - 52 A

480Y/277 V

5 kA

-

-

UL 1077

-

-

-

-

-

CSA C22.2 no. 235

0.5 - 50 A

480 V

5 kA

65 V

2 kA

EN 60934

0.5 - 30 A

240/420 V

4.5 kA

65 V

4.5 kA

GB 17701

-

-

-

-

-

Effect of ambient temperature

AC-breaker are calibrated for an ambient temperature of +40°C, DC-breakers for +23°C. To determine the rated current for a lower or

higher ambient temperature, use a correction factor from the table below:

Ambient temperature [°C]

Correction factor AC version

Correction factor DC version

-20

0.78

0.80

-5

0.82

0.87

0

0.83

0.90

+10

0.87

0.95

+23

0.91

1.00

+30

0.95

1.05

+40

1.00

1.10

+50

1.05

1.20

+60

1.11

1.30

Example DC version: Rated current = 10 A; Environmental temperature = 50 °C; --> Correction factor = 1.2; Resulting current = 12 A