Limitron® fast-acting, RK1 – 250 volt fuses
Catalog symbol - KTN-R-(amps)
Description:
Advanced protection Class RK1 current-limiting,
fast-acting fuses.
Specifications:
Ratings
• Volts:
• 250 Vac
• 250 Vdc (70-350 A)
• Amps - 1-600 A
• Interrupting rating:
• 200 kA Vac RMS Sym.
• 100 kA Vdc
Agency Information
• UL® Listed, Std. 248-12, Guide JDDZ,
File E54273
• CSA® Certified, Class 1422-02, File 53787
• CE
Features:
• Provides 10X better current limitation to help
prevent equipment damage caused by
short-circuit events
• 200 kA interrupting rating complies with
NEC® Section 110.9 for today’s large capacity
systems
• Fast-acting fuse helps prevent equipment
damage caused by short-circuit events
• Incorporates Class R rejection feature. Can
be inserted in non-rejection type fuse holders
to physically and electrically replace Class H,
K1, K5, and other fast-acting fuses
• Ideal for critical industrial or commercial
applications that have specific current
limitation requirements
| Catalog numbers | ||
| KTN-R-1 | KTN-R-30 | KTN-R-125 |
| KTN-R-2 | KTN-R-35 | KTN-R-150 |
| KTN-R-3 | KTN-R-40 | KTN-R-175 |
| KTN-R-4 | KTN-R-45 | KTN-R-200 |
| KTN-R-5 | KTN-R-50 | KTN-R-225 |
| KTN-R-6 | KTN-R-60 | KTN-R-250 |
| KTN-R-8 | KTN-R-70 | KTN-R-300 |
| KTN-R-10 | KTN-R-75 | KTN-R-350 |
| KTN-R-12 | KTN-R-80 | KTN-R-400 |
| KTN-R-15 | KTN-R-90 | KTN-R-450 |
| KTN-R-20 | KTN-R-100 | KTN-R-500 |
| KTN-R-25 | KTN-R-110 | KTN-R-600 |
Carton quantity and weight (250 vac)*
| Amps | Carton qty |
| 1-30 | 10 |
| 40-60 | 10 |
| 70-100 | 5 |
| 110-200 | 1 |
| 225-400 | 1 |
| 450-600 | 1 |
Dimensions – in :
Recommended fuse blocks and holders:
| Fuse amps | 1-Pole | 2-Pole | 3-Pole |
| 0-30 | HM25030-1 | HM25030-2 | HM25030-3 |
| 0-30 | RM25030-1 | RM25030-2 | RM25030-3 |
| 35-60 | HM25060-1 | HM25060-2 | HM25060-3 |
| 35-60 | RM25060-1 | RM25060-2 | RM25060-3 |
| 70-100 | RM25100-1CR | RM25100-2CR | RM25100-3CR |
| 110-200 | RM25200-1CR | RM25200-1CR | RM25200-1CR |
| 225-400 | RM25400-1CR | RM25400-1CR | RM25400-1CR |
| 450-600 | RM25600-1CR | RM25600-1CR | RM25600-1CR |
For additional information on 250 volt blocks, see data sheet
No. 10289 (RM250) and (HM250) and product brochure
No. 3192 (RM style).
Fuse reducers for Class R fuses - 250 V
| Equipment fuse clips | Desired fuse (case) Size | Catalog symbol (pairs) |
| 60A | 30A | NO.263-R |
| 100A | 30A | NO.213-R |
| 100A | 60A | NO.216-R |
| 200A | 60A | NO.226-R |
| 200A | 100A | NO.2621-R |
| 400A | 100A | NO.2641-R |
| 400A | 200A | NO.242-R |
| 600A | 100A | NO.2661-R |
| 600A | 200A | NO.2662-R |
| 600A | 400A | NO.2664-R† |
† Single reducer only (pair not required).
Time-current curves — average melt 