0713 BU-SB13684 Page 1 of 3 Data Sheet # 1001
Low-Peak™ 600V Class RK1
LPS-RK — 600Vac/300Vdc, 1⁄10-60A, Dual Element, Time-Delay Fuses
Features:
• Industry’s only UL Listed and CSA Certified fuse with a
300kA Vac interrupting rating that exceeds requirements for
virtually all applications
• Current-limitation for maximum short-circuit protection
• Easy selective coordination with all Low-Peak fuses using
simple 2:1 ampacity ratio
• “No damage” Type “2” protection for IEC and NEMA
starters when properly sized
• High inrush current motor protection
• Time-delay permits 130% FLA sizing for back-up motor
protection
• Protection against single-phase motor damage
• Low watt loss power consumption
Applications:
• Feeder and Branch Circuits
• Motors
• Transformers
• Solenoids
• General Purpose Circuits
Recommended Fuse Blocks
Fuse Amps 1-Pole 2-Pole 3-Pole
0-30 R60030-1 R60030-2 R60030-3
35-60 R60060-1 R60060-2 R60060-3
For additional information on the R600 Series of 600 volt fuse
blocks, see data sheet # 1111.
Fuse Reducers For Class R Fuses
Equipment Desired Fuse Catalog Numbers
Fuse Clips (Case) Size (Pairs) 600V
60A 30A NO.663-R
100A 30A NO.216-R
60A NO.616-R
200A 60A NO.626-R
For additional information on Class R fuse reducers, see
Data Sheet 1118.
Dimensions - in
0.81" (±0.008)
5"
(± 0.31)
1/10 to 30A
5.5"
(± 0.31)
35 to 60A
1.06" (±0.008)
Available with easyID™
open fuse indication
Description: Ultimate protection Class RK1 dual element,
current-limiting, time-delay fuses available with optional open
fuse indication on select ratings. Time-delay – 10 seconds
(minimum) at 500% of rated current.
Catalog Symbol: LPS-RK-(amp)SP (non-indicating)
LPS-RK-(amp)SPI (indicating)
Rating:
Volts — 600Vac, 300Vdc
Amps — 1⁄10-60A
IR — 300kA Vac RMS Sym.
— 100kA DC
Agency Information:
CE, UL Listed, Guide JDDZ, File E4273
CSA Certified, Class 1422-02, File 53787
Class RK1 per CSA C22.2, No. 248.12
Catalog Numbers (amps) – Non-indicating fuses
LPS-RK-1⁄10SP LPS-RK-11⁄2SP LPS-RK-5SP LPS-RK-20SP*
LPS-RK-2⁄10SP LPS-RK-16⁄10SP LPS-RK-56⁄10SP LPS-RK-25SP*
LPS-RK-3⁄10SP LPS-RK-18⁄10SP LPS-RK-6SP* LPS-RK-30SP*
LPS-RK-4⁄10SP LPS-RK-21⁄4SP LPS-RK-61⁄4SP* LPS-RK-35SP*
LPS-RK-1⁄2SP LPS-RK-21⁄2SP LPS-RK-7SP* LPS-RK-40SP*
LPS-RK-6⁄10SP LPS-RK-28⁄10SP LPS-RK-8SP* LPS-RK-45SP*
LPS-RK-8⁄10SP LPS-RK-3SP LPS-RK-9SP* LPS-RK-50SP*
LPS-RK-1SP LPS-RK-32⁄10SP LPS-RK-10SP* LPS-RK-60SP*
LPS-RK-11⁄8SP LPS-RK-31⁄2SP LPS-RK-12SP*
LPS-RK-11⁄4SP LPS-RK-4SP LPS-RK-15SP*
LPS-RK-14⁄10SP LPS-RK-41⁄2SP LPS-RK-171⁄2SP*
* Open fuse indication available by inserting the suffix “I,” e.g., LPS-RK-15SPI.
Requires 75Vac minimum voltage.
Carton Quantity and Weight
Amp Rating Carton Qty.
0–30 10
35–60 10
0713 BU-SB13684 Page 2 of 3 Data Sheet # 1001
Low-Peak™ 600V Class RK1
LPS-RK — 600Vac/300Vdc, 1⁄10-60A, Dual Element, Time-Delay Fuses
Time-Current Characteristic Curves–Average Melt
1 to 10 Amps
.1
.2
.15
.3
.4
.6
.5
.8
11.25
1.6
22.5
3.2
4
56.25
8
10
AMP RATING
300
100
10
1
0.1
0.01
0.1
1
10
100
1000
TIME IN SECONDS
RMS SYMMETRICAL CURRENT IN AMPS
0713 BU-SB13684 Page 3 of 3 Data Sheet # 1001
Low-Peak™ 600V Class RK1
LPS-RK — 600Vac/300Vdc, 1⁄10-60A, 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.
Time-Current Characteristic Curves–Average Melt
12 to 60 Amps
Current-Limitation Curves
60A
30A
AMP RATING
INSTANTANEOUS PEAK LET-THROUGH CURRENT IN AMPS
PROSPECTIVE SHORT-CIRCUIT CURRENT - SYMMETRICAL RMS AMPS
B
400,000
9,000
8,000
7,000
6,000
6,000
300,000
200,000
100,000
5,000
4,000
4,000
90,000
3,000
2,000
1,000
3,000
80,000
70,000
60,000
50,000
60,000
200,000
20,000
2,000
40,000
100,000
10,000
1,000
30,000
80,000
40,000
8,000
30,000
20,000
10,000
300,000
A
Current-Limiting Effects
Prosp. Let-Through Current
S.C.C. (Apparent RMS Symmetrical Vs. Fuse Rating)
30A 60A
1000 1000 1000
2000 1000 1000
3000 1000 1000
5000 1000 2000
10,000 1000 2000
15,000 1000 2000
20,000 2000 3000
25,000 2000 3000
30,000 2000 3000
35,000 2000 3000
40,000 2000 3000
50,000 2000 3000
60,000 2000 4000
70,000 2000 4000
80,000 2000 4000
90,000 2000 4000
100,000 2000 4000
150,000 3000 5000
200,000 3000 5000
250,000 3000 6000
300,000 3000 6000
