LOW-PEAK®LPS-RK
Dual-Element, Time-Delay Fuses 70-600A
Class RK1 –– 600 Vac/300 Vdc
Bussmann®
Features:
• High degree of current-limitation for maximum short-circuit
protection.
• 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 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
A
B
Catalog Symbol: LPS-RK_SP (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-70SP LPS-RK-150SP LPS-RK-350SP
LPS-RK-80SP LPS-RK-175SP LPS-RK-400SP
LPS-RK-90SP LPS-RK-200SP LPS-RK-450SP
LPS-RK-100SP LPS-RK-225SP LPS-RK-500SP
LPS-RK-110SP LPS-RK-250SP LPS-RK-600SP
LPS-RK-125SP LPS-RK-300SP —
Available with tin plate option. Add suffix “-TP”. (Ex.: LPS-RK-100SP-TP)
Carton Quantity and Weight—LPS-RK (600Vac)
Ampere Carton Weight*
Ratings Qty. Lbs. Kg.
70–100 1 2.20 1.0
110–200 1 1.10 0.5
225–400 1 2.36 1.1
450–600 1 3.44 1.5
*Weight per carton.
** Meets all performance requirements of UL Standard 248-12 for Class RK1
fuses.
Dimensional Data
Dimensions (inches)
Ampere Ratings “A” “B”
70-100 7.88 (± 0.062) 1.11 (± 0.020)
110-200 9.63 (± 0.062) 1.61 (± 0.020)
225-400 11.63 (± 0.094) 2.36 (± 0.020)
450-600 13.38 (± 0.094) 2.88 (± 0.020)
NNEEWW DDEESSIIGGNN
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.
Fuse Reducers For Class R Fuses
Desired Catalog Number
Equipment Fuse (Case) (Pairs)
Fuse Clips Size 600V
200A 100A No. 2621-R
400A 100A No. 2641-R
200A No. 642-R
100A No. 2661-R
600A 200A No. 2662-R
400A No. 2664-R*
*Single reducer only (pair not required).
For additional information, see Data Sheet: 1118.
Form No. LPS-RK 70-600
Page 1 of 3
Data Sheet: 1002
10-2-02 SB02295
Recommended fuseblocks for
Class R 600V fuses
See Data Sheet: 1111
LOW-PEAK®LPS-RK
Dual-Element, Time-Delay Fuses 70-600A
Class RK1 –– 600 Vac/300 Vdc
Form No. LPS-RK 70-600
Page 2 of 3
Data Sheet: 1002
Bussmann®
Time-Current Characteristic Average Melt
10-2-02 SB02295
Bussmann®
LOW-PEAK®LPS-RK
Dual-Element, Time-Delay Fuses 70-600A
Class RK1 –– 600 Vac/300 Vdc
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.
Form No. LPS-RK 70-600
Page 3 of 3
Data Sheet: 1002
B
A
600A
400A
200A
100A
AMPERE
RATING
400,000
100,000
1,000
INSTANTANEOUS PEAK LET-THROUGH CURRENT IN AMPS
200,000
RMS SYMMETRICAL CURRENTS IN AMPERES
100,000
10,000
1,000
300,000
10,000
A-B=ASYMMETRICAL AVAILABLE PEAK (2.3 x SYMM RMS AMPS)
Current-Limitation Curves
Current-Limiting Effects
Prosp. Let-Through Current (Apparent RMS
S.C.C. Symmetrical) Versus Fuse Rating
100A 200A 400A 600A
5,000 2,200 3,250 5,000 5,000
10,000 2,700 4,100 7,150 9,600
15,000 3,050 4,650 7,950 10,650
20,000 3,300 5,100 8,650 11,500
25,000 3,500 5,500 9,200 12,200
30,000 3,700 5,800 9,650 12,750
35,000 3,900 6,100 10,100 13,300
40,000 4,050 6,400 10,450 13,750
50,000 4,300 6,850 11,100 14,600
60,000 4,550 7,250 11,700 15,300
80,000 4,950 7,950 12,650 16,450
100,000 5,250 8,550 13,450 17,450
150,000 5,900 9,750 15,050 19,400
200,000 6,450 10,700 16,300 20,900
250,000 6,850 11,500 17,350 22,100
300,000 7,250 12,200 18,250 23,200
*Values derived from curve data.
10-2-02 SB02295
