Bussmann

Time-Current & Current Limitation Curves
FRN-R (250V) Class RK5 Fuses
Bussmann ®
Time-Current Characteristic Curves—Average Melt
Time-Current Characteristic Curves—Average Melt
300
100
15A
30A
60A
100A
200A
400A
600A
AMPERE
RATING
FRN-R
(250V)
300
100
1/10
2/10 15/100
3/10
4/10
1/2
6/10
8/10
1 1-1/4
1-6/10
2 2-1/2
3-2/10
4
6-1/4
10
5
8
12
AMPERE
RATING
FRN-R (250V)
10
10
TIME IN SECONDS
1
TIME IN SECONDS
1
.1
.1
.01
.1
1
10
100
CURRENT IN AMPERES
1,000
.01
20
100
1,000
CURRENT IN AMPERES
10,000
20,000
Current Limitation Curves
INSTANTANEOUS PEAK LET-THRU CURRENT AMPERES
400,000
FRN-R (250V)
100,000
10,000
A
1,000
1,000
10,000
100,000
B
200,000
AMPERE
RATING
600
400
200
100
60
30
PROSPECTIVE SHORT CIRCUIT CURRENT
SYMMETRICAL RMS AMPERES
223