- TE Connectivity P&B, formerly Tyco Electronics P&B serves many industries, including appliance, HVAC, industrial control, computer peripheral, and security. P&B offers a variety of relays and circuit breakers to meet your specifications. Electromechanical, solid state and time delay relays for PC board and panel/plug-in mounting. Thermal and magnetic circuit breakers. Additional relay brands from TE Connectivity available for immediate delivery at Digi-Key also include Kilovac, Products Unlimited, Schrack, OEG, Axicom, and Agastat.