What the 1.5SMCJ24C protects and how it is rated
The reverse standoff voltage of 24 V defines the maximum continuous operating rail the protected line can run at without the TVS conducting — above that, the diode begins to avalanche and clamp. The minimum breakdown of 26.7 V sets the onset of conduction; the maximum clamping voltage of 43 V at 34.9 A peak pulse is the voltage the downstream circuit sees during a transient event — so the downstream component's abs-max rating must survive a 43 V spike for the duration of the surge.
Active status and sourcing posture
The manufacturer marks this part as Active in production — no NRND notice, no EOL date, and no official successor listed in the Diotec Semiconductor record. As an active line, it carries no last-time-buy window and no broker-channel qualifier — sourced to BOM quantity through standard distribution and quoted on request with lead time and availability confirmed at RFQ.