TII Electronics 3251M Signal Circuit Protector

Description:

The TII Electronics 3251M Signal Circuit Protector is designed to protect telecommunications and signal circuits from lightning surges, power cross events, and transient overvoltages while maintaining reliable signal transmission. Commonly installed at network interface devices (NIDs), telephone distribution points, utility communication systems, and industrial telecommunications infrastructure requiring dependable surge protection. Maintenance teams, telecommunications providers, and system integrators use the 3251M Signal Circuit Protector to replace failed protector modules, improve network reliability, and safeguard sensitive communication equipment.

Applications:

The TII Electronics 3251M is a maximum-duty station protector module engineered to protect one-pair telecommunications circuits using Tii's Totel Failsafe® protection technology. It is widely used in telephone network interfaces, outside plant (OSP) installations, utility communications, industrial signaling systems, and commercial telecommunications infrastructure where high surge capacity and long-term circuit protection are essential.

Technical Specifications:

• Manufacturer: TII Electronics (Tii Technologies Inc.)
• Manufacturer Part Number (MPN): 3251M (325-1M)
• Product Type: Signal Circuit Protector / Station Protector Module
• Series: 325 Series Totel Failsafe®
• Circuit Capacity: One Pair
• Protection Technology: TFS® Totel Failsafe® Protector Module (355M)
• Maximum Discharge Surge Current: 130 A
• Lightning Impulse Current Rating: 40 kA
• Capacitance: <30 pF
• Housing: Flame-Retardant Plastic
• Mounting: Compatible with TII 325 Series Station Protector Bases
• Application: Telecommunications, outside plant (OSP), network interface devices (NIDs), utility communications, and industrial signal circuit protection.

Common Replacements:

• TII 325-1MT
• TII 326-1L
• TII 321-1M