0713 BU-SB13740 Page 1 of 3 Data Sheet # 1044
LIMITRON™ Class RK1 600V
KTS-R — 600Vac, 1-600A, Fast-Acting Fuses
Description: Advanced protection Class RK1 current-limiting,
fast-acting fuses.
Catalog Symbol: KTS-R-(amp)
Ratings:
Volts — 600Vac
Amps — 1-600A
IR — 200kA Vac RMS Sym.
Agency Information:
CE, UL Listed, Std. 248-12, Class RK1, Guide JDDZ,
File E4273
CSA Certified, C22.2 No. 248.12, Class 1422-02, File 53787
Catalog Numbers (amps)
KTS-R-1 KTS-R-20 KTS-R-80 KTS-R-275
KTS-R-2 KTS-R-25 KTS-R-90 KTS-R-300
KTS-R-3 KTS-R-30 KTS-R-100 KTS-R-350
KTS-R-4 KTS-R-35 KTS-R-110 KTS-R-400
KTS-R-5 KTS-R-40 KTS-R-125 KTS-R-450
KTS-R-6 KTS-R-45 KTS-R-150 KTS-R-500
KTS-R-8 KTS-R-50 KTS-R-175 KTS-R-600
KTS-R-10 KTS-R-60 KTS-R-200
KTS-R-12 KTS-R-70 KTS-R-225
KTS-R-15 KTS-R-75 KTS-R-250
Carton Quantity and Weight
Amp Rating Carton Qty.
1–30 10
40–60 10
70–100 1
110–200 1
225–400 1
450–600 1
Dimensions – in
Features:
• Single-element, fast-acting fuses with minimal time-delay
• Provides a high degree of short-circuit current-limitation
(component protection)
• Particularly suited for circuits and loads with no heavy surge
currents of motors, transformers, solenoids, and welders
• Commonly used to protect circuit breakers with lower inter-
rupting ratings.
• If used in circuits with surge currents (motors, etc.) must be
sized to prevent unwanted opening. It is recommended to
use an ultimate protection Low-Peak™ LPS-RK time-delay
fuse for inductive load applications.
• Incorporate Class R rejection feature. Can be inserted in
non-rejection type fuse holders to physically and electrically
replace fast-acting Class H, K1, K5, RK5, and other fast-
acting fuses.
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
70-100 RM60100-1CR RM60100-2CR RM60100-3CR
110-200 RM60200-1CR RM60200-2CR RM60200-3CR
225-400 RM60400-1CR RM60400-2CR RM60400-3CR
450-600 RM60600-1CR RM60600-2CR RM60100-3CR
For additional information on 600 volt fuse blocks, see Data
Sheet # 1111 (1-60A) and product brochure # 3192 (70-600A).
Fuse Reducers For Class R Fuses
Equipment Desired Fuse Catalog Numbers
Fuse Clips (Case) Size (Pairs)
60A 30A NO.663-R
100A 30A NO.216-R
60A NO.616-R
200A 60A NO.626-R
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 on Class R fuse reducers, see
Data Sheet # 1118.
1/10 to 30A
0.81" (± 0.008)
5"
(± 0.31)
1.0" (± 0.008)
70 to 100A
7.88"
(± 0.062)
35 to 60A
1.06" (± 0.008)
5.5"
(± 0.31)
450 to 600A
13.38"
(± 0.094)
1.5" (± 0.008)
2.0" (± 0.008)
2.5" (± 0.008)
110 to 200A
9.63"
(± 0.062)
225 to 400A
11.63"
(± 0.094)
0713 BU-SB13740 Page 2 of 3 Data Sheet # 1044
LIMITRON™ Class RK1 600V
Time-Current Curves - Average Melt
RMS SYMMETRICAL CURRENT IN AMPS
TIME IN SECONDS
300
100
10
1
0.1
0.01
40
100
1,000
10,000
30A
60A
100A
200A
400A
600A
AMP RATING
KTS-R — 600Vac, 1-600A, Fast-Acting Fuses
0713 BU-SB13740 Page 3 of 3 Data Sheet # 1044
LIMITRON™ Class RK1 600V
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.
Current-Limitation Curves
600
100
60
AMP RATING
30
400
200
200,000
100,000
10,000
1,000
1,000
INSTANTANEOUS PEAK LET-THROUGH CURRENT IN AMPS
400,000
100,000
10,000
RMS SYMMETRICAL CURRENTS IN AMPS
A–B=ASYMMETRICAL AVAILABLE PEAK (2.3 x SYMM RMS AMPS)
B
A
KTS-R — 600Vac, 1-600A, Fast-Acting 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.
