Description:
Advanced protection Class RK1 current-limiting, fast-acting fuses.
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)
Dimensions – in
| 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 Reducers For Class R Fuses
† Single reducer only (pair not required)
Time-Current Curves - Average Melt
Current-Limitation Curves
| 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† |
Time-Current Curves - Average Melt
Current-Limitation Curves
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