Circa Telecom Low Voltage Solid State Protection Module — 75V (Model 4B3S-75 RED)
The Circa Telecom 4B3S-75 RED is a solid-state 5-pin protector module engineered for low voltage telecommunications line protection. With a 75V clamping voltage and self-resetting capability, it provides reliable overvoltage protection without requiring manual replacement after a fault event.
Key Features
- 75V clamping voltage for low voltage circuit protection
- Solid state design for reliable, fast response
- 5-pin configuration for standard protector block compatibility
- Self-resetting — automatically recovers after overvoltage event
- Red color for easy identification
Specifications
- Manufacturer: Circa Telecom
- Model: 4B3S-75 RED
- Type: Solid State Protector Module
- Clamping Voltage: 75V
- Pin Count: 5
- Reset: Self-resetting
- Color: Red
Applications
Designed for use in telecom protector blocks at building entrance or cross-connect locations to guard 75V-rated circuits from overvoltage transients. Used by telecommunications technicians and contractors for protecting subscriber lines, DSL circuits, and low voltage data lines.





