Clamping profile and circuit fit
The 1.5KE33CA/54: The 28.2 V reverse standoff voltage means it sits across a 24 V rail or a 28 V signal line without conducting in normal operation — the TVS only activates when the line exceeds the 31.4 V minimum breakdown threshold. Single bidirectional channel — the symmetrical breakdown characteristic protects both polarities, making it suitable for AC signal lines or bipolar DC rails where the transient can swing either direction.
Housed in the DO-201AA (DO-27) axial-lead through-hole package, the 1.5KE33CA/54 uses a legacy footprint that requires a board spin if migrating to a surface-mount alternative. The junction temperature range spans -55°C to 175°C — military/industrial grade that covers avionics, downhole, and outdoor telecom enclosures. No power line protection rating — this device is intended for signal and data line transient suppression, not AC mains or high-energy power entry.