Bussmann®
LOW-PEAK®
LPN-RK
Dual-Element, Time-Delay Fuses
Class RK1 – 250 Volt
⁄Ω¡º-60A
Dimensional Data
2"
(± 0.31)
*Meets all performance requirements of UL Standard 248-12 for Class RK1 fuses.
0.81" (± 0.008)
35A to 60A
⁄Ω¡ºA to 30A
Catalog Symbol: LPN-RK_SP
Dual-Element, Time-Delay – 10 seconds (minimum) at 500%
rated current (8 seconds for 0-30A sizes)
Current-Limiting
Ampere Rating: ⁄Ω¡º to 60 Amperes
Voltage Rating: 250 Volts AC (or less)
Interrupting Rating:
AC: 300,000A RMS Sym.
DC: 50,000 Amperes
Agency Approvals:
UL Listed – Special Purpose*, Guide JFHR, File E56412
CSA Certified (200,000AIR), Class 1422-02, File 53787
Class RK1 per CSA C22.2, No. 248.12
3"
(± 0.31)
0.56" (± 0.008)
Features:
• 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
protection.
• Protection against single-phase motor damage.
• Low watt loss power consumption.
• Electrically isolated end caps.
• 125 Vdc, U.L. Listed.
Fuse Reducers For Class R Fuses
Desired
Fuse (Case)
Size
Equipment
Fuse Clips
60A
100A
200A
Catalog Number
(Pairs)
250V
30A
No. 263-R
30A
No. 213-R
60A
No. 216-R
60A
No. 226-R
Fuseblocks
30 Amp Case
Catalog Numbers
1 Pole
2 Pole
LPN-RK-⁄Ω¡ºSP
LPN-RK-2SP
LPN-RK-9SP
Box Lug
R25030-1CR
R25030-2CR
3 Pole
R25030-3CR
LPN-RK-⁄fiΩ¡ººSP
LPN-RK-2⁄Ω¢SP
LPN-RK-10SP
Screw
R25030-1SR
R25030-2SR
R25030-3SR
LPN-RK-¤Ω¡ºSP
LPN-RK-2⁄Ω™SP
LPN-RK-12SP
R25030-2PR
R25030-3PR
LPN-RK-2°Ω¡ºSP
LPN-RK-15SP
Pressure
Plate
R25030-1PR
LPN-RK-‹Ω¡ºSP
LPN-RK-›Ω¡ºSP
LPN-RK-3SP
LPN-RK-17⁄Ω™SP
60 Amp Case
LPN-RK-⁄Ω™SP
LPN-RK-3¤Ω¡ºSP
LPN-RK-20SP
1 Pole
2 Pole
3 Pole
LPN-RK-flꭧSP
LPN-RK-3⁄Ω™SP
LPN-RK-25SP
Box Lug
R25060-1CR
R25060-2CR
R25060-3CR
LPN-RK-°Ω¡ºSP
LPN-RK-4SP
LPN-RK-30SP
Screw
R25060-1SR
R25060-2SR
R25060-3SR
LPN-RK-1SP
LPN-RK-4⁄Ω™SP
LPN-RK-35SP
R25060-2PR
R25060-3PR
LPN-RK-5SP
LPN-RK-40SP
Pressure
Plate
R25060-1PR
LPN-RK-1⁄Ω•SP
LPN-RK-1⁄Ω¢SP
LPN-RK-5flꭧSP
LPN-RK-45SP
LPN-RK-1›Ω¡ºSP
LPN-RK-6SP
LPN-RK-50SP
LPN-RK-1flꭧSP
LPN-RK-6⁄Ω¢SP
LPN-RK-60SP
LPN-RK-1°Ω¡ºSP
LPN-RK-8SP
CE logo denotes compliance with European Union Low Voltage Directive
(50-1000 VAC, 75-1500 VDC). Refer to BIF document #8002 or contact
Bussmann Application Engineering at 636-527-1270 for more information.
—
Carton Quantity and Weight
Ampere
Ratings
Weight**
Carton
Qty.
Lbs.
Kg.
0–30
10
0.5
0.227
35–60
10
1.2
0.544
**Weight per carton.
12-1-99
A99074
Rev. A
Form No. LPN-RK 0-60
Page 1 of 2
BIF Doc #1003
Bussmann®
LOW-PEAK®
LPN-RK
AMPERE
RATING
60A
4
6.25
300
30A
AMPERE
RATING
15A
20A
300
⁄Ω¡º-60A
Time-Current Characteristic Curves–Average Melt
.1
.15
.2
.3
.4
.6
1
1.6
2.5
3.2
5
8
10
12
.5
.8
1.25
2
Dual-Element, Time-Delay Fuses
Class RK1 – 250 Volt
100
100
1
10
1,000
100
1
.1
.01
10
.1
RMS SYMMETRICAL CURRENT IN AMPERES
TIME IN SECONDS
TIME IN SECONDS
10
1
B
400,000
10,000
30
.01
1,000
60
10,000
20
100,000
100
AMPERE
RATING
.1
RMS SYMMETRICAL CURRENT IN AMPERES
200,000
10,000
1,000
100,000
A
1,000
INSTANTANEOUS PEAK LET-THROUGH CURRENT IN AMPS
Current-Limitation Curves
RMS SYMMETRICAL CURRENTS IN AMPERES
A–B=ASYMMETRICAL AVAILABLE PEAK (2.3 x SYMM RMS AMPS)
12-1-99
A99074
Rev. A
The only controlled copy of this BIF document 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
contained in this bulletin. Once a product has been selected, it should be tested by the user in all
possible applications.
Form No. LPN-RK 0-60
Page 2 of 2
BIF Doc #1003