Bussmann
®
LOW-PEAK
®
Dual-Element, Time-Delay Fuses
Class RK1 –– 600 Vac/300 Vdc
Current-Limitation Curves
B
LPS-RK_SPI
70-600A
400,000
INSTANTANEOUS PEAK LET-THROUGH CURRENT IN AMPS
100,000
600A
400A
200A
100A
10,000
A
1,000
100,000
200,000
300,000
10,000
1,000
RMS SYMMETRICAL CURRENTS IN AMPERES
A-B=ASYMMETRICAL AVAILABLE PEAK (2.3 x SYMM RMS AMPS)
Current-Limiting Effects
Prosp.
S.C.C.
5,000
10,000
15,000
20,000
25,000
30,000
35,000
40,000
50,000
60,000
80,000
100,000
150,000
200,000
250,000
300,000
100A
2,200
2,700
3,050
3,300
3,500
3,700
3,900
4,050
4,300
4,550
4,950
5,250
5,900
6,450
6,850
7,250
Let-Through Current (Apparent RMS
Symmetrical) Versus Fuse Rating
200A
400A
600A
3,250
5,000
5,000
4,100
7,150
9,600
4,650
7,950
10,650
5,100
8,650
11,500
5,500
9,200
12,200
5,800
9,650
12,750
6,100
10,100
13,300
6,400
10,450
13,750
6,850
11,100
14,600
7,250
11,700
15,300
7,950
12,650
16,450
8,550
13,450
17,450
9,750
15,050
19,400
10,700
16,300
20,900
11,500
17,350
22,100
12,200
18,250
23,200
*Values derived from curve data.
The only controlled copy of this Data Sheet is the electronic read-only version located on the 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. Bussmann reserves the right, without notice, to change
design or construction of any products and to discontinue or limit distribution of any products. Bussmann also reserves the right to change or update, without notice, any technical information con-
tained in this bulletin. Once a product has been selected, it should be tested by the user in all possible applications.
AMPERE
RATING
8-26-04
SB04295
Form No. LPS-RK 70-600
Page 3 of 3
Data Sheet: 1064
COOPER [ COOPER BUSSMANN, INC. ]
