Overview
The Cefco CRN-R-150 is a dual element time delay fuse engineered for use in branch circuits and feeder applications requiring coordinated protection. The 150A rating at 250V makes it suitable for industrial machinery, HVAC systems, and general plant protection applications where a time-delay characteristic allows inrush currents to pass without nuisance opens.
Key Features
- Dual element design provides time-delay protection against temporary overloads
- 150A current rating at 250V or less AC
- Class RK-5 current-limiting fuse with high interrupting rating
- 40×108mm form factor fits standard fuse clips and rejection-style holders
- 200,000 AMP RMS symmetrical interrupting capacity
Technical Specifications
| Ampere Rating | 150A |
| Voltage Rating | 250V AC (or less) |
| Fuse Class | RK-5 |
| Fuse Type | Dual Element, Time Delay |
| Physical Size | 40×108mm |
| Interrupting Rating | 200,000 AMP RMS Symmetrical |
| Manufacturer | Cefco |
| Series | CRN-R |
Typical Applications
- Motor branch circuit protection
- HVAC equipment and compressor circuits
- Industrial machinery feeder lines
- Control panel protection
- Commercial facility electrical distribution
Compatibility & Replacements
Compatible With
- Standard single-pole fuse holders and clips (Class RK-5)
- Rejection-style fuse holders with Class RK-5 slots
- Industrial control panels and electrical distribution boards
- Motor control centers with 250V circuits
Replaces / Drop-In Replacement For
- Other 150A, 250V RK-5 dual element time delay fuses of equivalent specification
- Verify specific interchangeability with system documentation before ordering
Works With
- Class RK-5 fuse holder systems
- UL and CSA certified electrical installations
- Standard AC distribution circuits up to 250V
