From Ethernet CAT-5 to 55VDC LED signal wires, the ALPU protects broadband. The ALPU Series surge suppressor is a high-speed, high-current, solid-state device designed to protect numerous broadband applications using silicon avalanche suppressor diodes (SASD). The ALPU Series connects to the service in a pass-through configuration. The ALPU is housed in either a molded plastic enclosure that is designed to meet NEMA 3R or an aluminum waterproof enclosure. The ALPU Series includes . The ALPU protects standard 10/100 Base T, ethernet/CAT-5, gigabit ethernet, coaxial (F connector), RS422/485, 120 VAC, and T1 signals. Transtector's latest ALPU design, the ALPU-ALVR for Alvarion radios is now a UL 497 listed signal circuit protector for primary protection, but also appropriate for secondary protection. Transtector is the pioneer and the leader in wireless broadband protection.

Transtector Systems, a Smiths Interconnect Company, provides a complete line of advanced suppression and power quality products. The company pioneered the use of non-degrading silicon diodes in 1967 and today markets to the worldwide telecommunications, industrial, medical and OEM markets.