Bulletin 1492-MC
Circuit Breaker
Product Description
Time Current Curve – 1-Pole Circuit Breaker
0
1
Time Current Curve
1492-MCAA1NN
1492-MCBA1NN
1492-MCEA1NN
1492-MCGA1NN
1-pole Circuit Breaker
CURRENT IN PERCENT OF BREAKER TRIP UNIT RATING
10,000
5,000
10,000
2
— 40 ºC Ambient
5,000
— 4 ft 60 º/75 ºC Wire per Terminal
— Open Air
3,000
2,000
3,000
2,000
3
1,000
500
1,000
500
4
300
200
300
200
5
100
50
100
50
(50-70 Amp)
(10-40 Amp)
Maximum Single-Pole
Trip Times at 25 °C➀
30
20
30
20
6
Minimum
Maximum
10
10
5
7
5
3
2
3
2
8
1
1
.5
.5
.3
.2
.3
.2
9
.1
.1
10
11
12
13
.05
.05
.03
.02
.03
.02
Maximum Interrupting Time
.01
.01
.005
.005
.003
.002
.003
.002
.001
.001
CURRENT IN PERCENT OF BREAKER TRIP UNIT RATING
www.ab.com/catalogs
Preferred availability cat. nos. are bold.
7-8
Publication A117-CA001A-EN-P
ROCKWELL [ ROCKWELL INTERNATIONAL CORPORATION. ]
