5-Pin 300V Gas Tube Protector

The Circa 3B1E is a premium 5-pin, 3-element gas tube protector module designed for heavy-duty transient and power fault protection in standard telephone line applications.

Its primary advantage is the balanced protection provided by its common chamber design. This ensures that an overvoltage on either side of the circuit triggers the gas tube simultaneously, preventing "lagging" transients that often damage sensitive equipment when using older 2-element designs.

Key Specifications

Features & Performance

• Fail-Safe Mechanism: Includes a heat-activated fail-safe that permanently shorts the module to ground under sustained power-cross conditions.

• Surge Life:

  • > 3,000 operations at $10\text{A}$ ($10 \times 1000\mu\text{s}$).

  • 10 operations at $10\text{kA}$ ($8 \times 20\mu\text{s}$).

• Certifications: UL and cUL listed (UL 497), RUS approved, and designed to exceed Telcordia (Bellcore) standards.

• Applications: Ideal for Central Office environments, remote locations, and small PBX/interconnect installations where heavy-duty current handling is required.