Bussmann
®
Low-Peak
®
Dual-Element Time-Delay Fuses
Class RK1 – 250 Volts AC/DC
Current Limitation Curves
LPN-RK_SPI
70-600A
400,000
B
INSTANTANEOUS PEAK LET-THROUGH CURRENT IN AMPERES
100,000
600A
400A
200A
100A
10,000
A
1,000
100,000
200,000
1,000
300,000
10,000
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
Let-Through Current (Apparent RMS
Symmetrical) Versus Fuse Rating
100A
200A
400A
600A
2,100
3,150
5,000
5,000
2,600
3,950
6,900
9,250
2,950
4,500
7,650
10,250
3,200
4,900
8,350
11,050
3,350
5,300
8,850
11,750
3,550
5,600
9,300
12,250
3,750
5,850
9,700
12,800
3,900
6,150
10,050
13,250
4,150
6,600
10,700
14,050
4,400
7,000
11,250
14,750
4,750
7,650
12,200
15,850
5,050
8,250
12,950
16,800
5,700
9,400
14,500
18,650
6,200
10,300
15,700
20,100
6,600
11,050
16,700
21,250
7,000
11,750
17,550
22,350
*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. LPN-RK 70-600
Page 3 of 3
Data Sheet: 1066
COOPER [ COOPER BUSSMANN, INC. ]
