1.5 kW bidirectional TVS for DC rail and signal-line clamping
The 1.5KE51CA_R2_00001: Its 43.6 V reverse standoff voltage means it sits across a 36 V or 42 V bus without conducting in normal operation, then clamps at 70.1 V max when a surge hits (cite:,). That 1.5 kW rating is the nominal peak pulse power at 25 °C — derate linearly above that per the datasheet curve, which is standard for this class of axial-lead TVS.
Active production, through-hole axial package
Housed in a DO-201AE axial-lead package, it is a through-hole device intended for wave-solder or hand-solder assembly (cite:,). The axial form factor is common in industrial PSUs, motor-drive snubbers, and telecom line cards where the TVS is wired point-to-point across the bus. Operating junction temperature spans -65 °C to 175 °C (cite:), covering military-temperature-range applications and high-ambient enclosures where the TVS sits close to a hot power stage.
Single bidirectional channel, no power-line protection
The device has one bidirectional channel — it clamps both polarities symmetrically, so no polarity orientation is needed on the PCB (cite:). This is useful for AC-coupled signal lines or floating DC buses where the transient polarity is unknown. Power line protection is not supported (cite:) — the 1.5KE51CA is specified for secondary-side transient suppression, not for direct mains clamping. Use it downstream of a fuse or circuit breaker on the DC rail, not across the AC line input.