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Cooper Bussmann T-Tron® JJN Series Fuses
Very Fast-Acting, Current-Limiting Fuses
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What's special about these fuses?
The most important component of the fuse is the element. This is generally made of a high conductivity material such as pure copper, silver-plated copper or even silver. The T-Tron® is a very fast acting fuse which is equipped with a silver element for high current limiting ability. |
- 200,000A interrupting rating provides high ratings at all circuit locations so, no matter where this fuse is placed, the equipment is protected from electrical surge
- Space-saving fuses offers a high degree of current limitation on short-circuits for unbeatable component protection
- High speed of response for semiconductor protection
- UL, CSA, CE rated
Ratings:
- UL Listed–Cartidge Fuses, Nonrenewable, Guide JDDZ, File E4273 - PDF

- CSA Certified, Class 1422-02 HRC Type, File 53787C00 - PDF

- GE Series Rating Chart - PDF

- Siemens Rating Chart - PDF

Typical Applications:
- Large apartment complexes
- Multi-family meter stacks
- VFD line protection
- Electric heat circuits
- Load centers
- Disconnect switches
- Meters
| PART # | DIMENSIONS | Maximum AC Voltage | Amperage Rating | AC Interrupting Ratings | Fuse Class | Fast Acting |
| CB-JJN-60 | 0.88"L × 0.56"D | 300 | 60A | 200000 at 300V | Class T | Yes |
| CB-JJN-100 | 2.16"L × 0.75"D | 300 | 100A | 200000 at 300V | Class T | Yes |
| CB-JJN-125 | 2.44"L × 0.88"D | 300 | 125A | 200000 at 300V | Class T | Yes |
| CB-JJN-150 | 2.44"L × 0.88"D | 300 | 150A | 200000 at 300V | Class T | Yes |
| CB-JJN-200 | 2.44"L × 0.88"D | 300 | 200A | 200000 at 300V | Class T | Yes |
| CB-JJN-300 | 2.75"L × 1"D | 300 | 300A | 200000 at 300V | Class T | Yes |
| CB-JJN-400 | 2.75"L × 1"D | 300 | 400A | 200000 at 300V | Class T | Yes |
| CB-JJN-600 | 3.06"L × 1.25"D | 300 | 600A | 200000 at 300V | Class T | Yes |
| CB-JJN-800 | 3.38"L × 1.75"D | 300 | 800A | 200000 at 300V | Class T | Yes |
| CB-JJN-1200 | 4"L × 2"D | 300 | 1200A | 200000 at 300V | Class T | Yes |
Cooper Bussmann Class JJN, T-Tron® Very Fast Acting Fuse
| PART # | AMPS | DIMENSIONS | WEIGHT | PRICE |
| CB-JJN-60 | 60A | 0.88"L × 0.56"D | 0.1 lb. | $16.11![]() |
| CB-JJN-100 | 100A | 2.16"L × 0.75"D | 0.05 lb. | $22.67![]() |
| CB-JJN-125 | 125A | 2.44"L × 0.88"D | 0.15 lb. | $38.72![]() |
| CB-JJN-150 | 150A | 2.44"L × 0.88"D | 0.15 lb. | $36.75![]() |
| CB-JJN-200 | 200A | 2.44"L × 0.88"D | 0.3 lb. | $35.34![]() |
| CB-JJN-300 | 300A | 2.75"L × 1"D | 0.3 lb. | $85.92![]() |
| CB-JJN-400 | 400A | 2.75"L × 1"D | 0.25 lb. | $66.82![]() |
| CB-JJN-600 | 600A | 3.06"L × 1.25"D | 0.3 lb. | $111.93![]() |
| CB-JJN-800 | 800A | 3.38"L × 1.75"D | 0.85 lb. | $380.61![]() |
| CB-JJN-1200 | 1200A | 4"L × 2"D | 1.45 lbs. | $432.69![]() |
COMPARISON CHART -
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CATALOG - PDF
For your convenience, we have made our brochure and catalogs available online in PDF format. Downloading the PDF catalog will take you no more than 5 minutes, so you won't have to wait days for the print catalog. PDF catalogs include links to our products: just click on the hyperlinked product headings, and you'll be directed right to our website.
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