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KTN-R LIMITRON™ Class RK1 250V Fast-Acting Fuses

KTN-R LIMITRON™ Class RK1 250V Fast-Acting Fuses

Description: Advanced protection Class RK1 current-limiting, fast-acting fuses.

Catalog Symbol: KTN-R-(amp)

Ratings:
Volts: 250Vac; 250Vdc (70-600A)
Amps: 1-600A
IR: 200kA Vac RMS Sym. 100kA Vdc

Agency Information:
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)

KTN-R-1 KTN-R-10 KTN-R-40 KTN-R-100 KTN-R-250
KTN-R-2 KTN-R-12 KTN-R-45 KTN-R-110 KTN-R-300
KTN-R-3 KTN-R-15 KTN-R-50 KTN-R-125 KTN-R-350
KTN-R-4 KTN-R-20 KTN-R-60 KTN-R-150 KTN-R-400
KTN-R-5 KTN-R-25 KTN-R-70 KTN-R-175 KTN-R-450
KTN-R-6 KTN-R-30 KTN-R-80 KTN-R-200 KTN-R-500
KTN-R-8 KTN-R-35 KTN-R-90 KTN-R-225 KTN-R-600

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 interrupting ratings
• If used in circuits with surge currents (motors, etc.) must be sized to prevent unwanted opening and thus only provide short-circuit protection
• 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 fastacting fuses.

Recommended Fuse Blocks

Fuse Amps 1-Pole 2-Pole 3-Pole
0-30 H25030-1 H25030-2 H25030-3
R25030-1 R25030-2 R25030-3
35-60 H25060-1 H25060-2 H25060-3
R25060-1 R25060-2 R25060-3
70-100 RM25100-1CR RM25100-2CR RM25100-3CR
110-200 RM25200-1CR RM25200-2CR RM25200-3CR
225-400 RM25400-1CR RM25400-2CR RM25400-3CR
450-600 RM25600-1CR RM25600-2CR RM25600-3CR


Fuse Reducers For Class R Fuses

Equipment Fuse Clips Desired Fuse (Case)Size Catalog Numbers (Pairs)250V
60A 30A NO.263-R
100A 30A NO.213-R
60A NO.216-R
200A 60A NO.226-R
200A 100A NO.2621-R
400A 100A NO.2641-R
200A NO.642-R
600A 100A NO.2661-R
200A NO.2662-R
400A NO.2664-R†

† Single reducer only (pair not required)

Time-Current Curves - Average Melt


Current-Limitation Curves