0713 BU-SB13731 Page 3 of 3 Data Sheet # 1020
FUSETRON™ Class RK5
The only controlled copy of this Data Sheet is the electronic read-only version located on the Cooper 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. Cooper Bussmann reserves the right, without notice, to change
design or construction of any products and to discontinue or limit distribution of any products. Cooper 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.
Current-Limitation Curves
400000
9000
8000
7000
7000
6000
6000
300000
200000
100000
5000
4000
4000
90000
3000
2000
1000
3000
70000
80000
70000
60000
B
A
50000
60000
200000
20000
2000
40000
100000
50000
10000
5000
1000
30000
90000
80000
40000
9000
8000
30000
20000
10000
600A
400A
200A
100A
AMP RATING
INSTANTANEOUS PEAK LET-THROUGH CURRENT IN AMPS
PROSPECTIVE SHORT-CIRCUIT CURRENT - SYMMETRICAL RMS AMPS
FRN-R — 250Vac/125Vdc, 70-600A, Dual Element, Time-Delay Fuses
The only controlled copy of this Data Sheet is the electronic read-only version located on the Cooper 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. Cooper Bussmann reserves the right, without notice, to change
design or construction of any products and to discontinue or limit distribution of any products. Cooper 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.
Current-Limiting Effects
Prosp. Let-Through Current
S.C.C. (Apparent RMS Symmetrical Vs. Fuse Rating)
100A 200A 400A 600A
5000 3000 5000 5000 5000
10,000 4000 7000 10,000 10,000
15,000 5000 8000 11,000 15,000
20,000 5000 8000 12,000 16,000
25,000 6000 9000 13,000 17,000
30,000 6000 10,000 14,000 18,000
35,000 6000 10,000 15,000 19,000
40,000 7000 11,000 15,000 20,000
50,000 7000 11,000 17,000 21,000
60,000 8000 12,000 18,000 22,000
70,000 8000 13,000 19,000 23,000
80,000 8000 13,000 19,000 24,000
90,000 9000 14,000 20,000 25,000
100,000 9000 14,000 21,000 26,000
150,000 10,000 16,000 24,000 29,000
200,000 11,000 18,000 26,000 32,000