Transient voltage suppression in DO-214AB
The 1.5SMC68CA TR13 PBFREE: At 58.1 V typical reverse standoff voltage, the device idles below the protection threshold through normal line operating conditions; once the surge pushes the line above the 64.6 V minimum breakdown, the Zener avalanche kicks in and the clamp limits the peak let-through to 92 V maximum.
Thermal headroom for protected circuits
Junction temperature is rated -65°C to 150°C, giving margin in outdoor enclosures, automotive under-hood environments, and any application where the TVS sits adjacent to a warm switching supply — the Zener mechanism conducts the surge energy to heat, and that derated thermal budget is what keeps the clamp voltage from walking up over time. SMC (DO-214AB) is the mid-size SMA-package footprint — the wide metal tab under the body is the primary heatsinking path to the PCB pad, so the land pattern and solder joint quality directly affect the surge survivability the datasheet promises.
Listed as Active by Central Semiconductor Corp — this part is in normal production and supported through independent distribution channels.