Bussmann S506 Series Time-Delay Glass Tube Fuse — Model S506-12.5-R
The Bussmann S506-12.5-R is a time-delay glass tube fuse designed for holder mount installations in industrial and safety equipment. Rated at 12.5A and 250V in the standard 5×20 mm cylindrical size, it provides reliable overcurrent protection with a time-delay characteristic that tolerates harmless inrush currents while responding to sustained overloads.
Key Specifications
- Current Rating: 12.5A
- Voltage Rating: 250V
- Size: 5 x 20 mm (cylindrical)
- DC Cold Resistance: 0.004 Ohms
- Termination: Clip
- Indicator: Without Indicator
- Series: S506
Standards & Certifications
- cULus Listed
- PSE/JET Listed
Applications
Suitable for industrial control equipment, test and measurement instruments, safety systems, and other applications requiring time-delay fuse protection in the 5×20 mm form factor. The glass tube construction allows visual inspection of fuse condition without removal.

