Bussmann
®
LOW-PEAK
®
Dual-Element, Time-Delay Fuses
Class RK1 –– 600 Vac/300 Vdc
Dimensional Data
LPS-RK_SPI
70-600A
NEW
A
DES
IGN
B
Dimensions
(inches)
Ampere Ratings
70-100
110-200
225-400
450-600
7.88
9.63
11.63
13.38
“A”
(± 0.062)
(± 0.062)
(± 0.094)
(± 0.094)
1.11
1.61
2.36
2.88
“B”
(± 0.020)
(± 0.020)
(± 0.020)
(± 0.020)
Catalog Symbol:
LPS-RK_SPi (600V)
Ampere Rating:
70 to 600A
Voltage Rating:
ac: 600V (or less)
dc: 300V (or less)
Interrupting Rating:
ac: 300,000A RMS Sym.
dc: 100,000A
Agency Information:
UL Listed–Special Purpose**, Guide JFHR, File E56412
CSA Certified, (200,000 AIR) Class 1422-02, File 53787,
Class RK1 per CSA C22.2 No. 248.12
Catalog Numbers
LPS-RK-70SPI
LPS-RK-80SPI
LPS-RK-90SPI
LPS-RK-100SPI
LPS-RK-110SPI
LPS-RK-125SPI
LPS-RK-150SPI
LPS-RK-175SPI
LPS-RK-200SPI
LPS-RK-225SPI
LPS-RK-250SPI
LPS-RK-300SPI
LPS-RK-350SPI
LPS-RK-400SPI
LPS-RK-450SPI
LPS-RK-500SPI
LPS-RK-600SPI
—
Features:
• High degree of current-limitation for maximum short-circuit
protection.
• Type 2 protection for IEC and NEMA starters when
properly sized.
• Permanent replacement fuse indication.
• High inrush current motor protection.
• Time-delay permits 130% FLA sizing for back-up motor over-
load protection, and single-phasing protection.
• Low watt loss power consumption.
• Electrically isolated end caps.
• 300Vdc, UL Listed.
Applications:
• Branch distribution
• Motors
• Transformers
• Solenoids
• General purpose circuits
Recommended fuseblocks for
Class R 600V fuses
See Data Sheet: 1111
Fuse Reducers For Class R Fuses
Equipment
Fuse Clips
200A
400A
Desired
Fuse (Case)
Size
100A
100A
200A
100A
600A
200A
400A
*Single reducer only (pair not required).
For additional information, see Data Sheet: 1118.
CE logo denotes compliance with European Union Low Voltage Directive
(50-1000Vac, 75-1500Vdc). Refer to Data Sheet: 8002 or contact
Bussmann Application Engineering at 636-527-1270 for more information.
Catalog Number
(Pairs)
600V
No. 2621-R
No. 2641-R
No. 642-R
No. 2661-R
No. 2662-R
No. 2664-R*
Available with tin plate option. Add suffix “-TP”. (Ex.: LPS-RK-100SP-TP)
Carton Quantity and Weight—LPS-RK (600Vac)
Ampere
Ratings
70–100
110–200
225–400
450–600
Qty.
1
1
1
1
Carton
Lbs.
2.20
1.10
2.36
3.44
Weight*
Kg.
1.0
0.5
1.1
1.5
*Weight per carton.
** Meets all performance requirements of UL Standard 248-12 for Class RK1
fuses.
For non-indicating version, the LPS-RK_SP
is available. See Data Sheet: 1002
Form No. LPS-RK 70-600
Page 1 of 3
Data Sheet: 1064
8-26-04
SB04295
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
Embedded System
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