1.5SMC series TVS Zener in DO-214AB
The 1.5SMC68CA_R1_00001 is a unidirectional TVS Zener from Panjit International Inc., rated 1500 W peak pulse power in the 1.5SMC series — a standard 1.5 kW clamping class that appears across multiple suppliers and is widely second-sourced in the DO-214AB (SMC) package. Bidirectional polarity means it clamps both polarities of transient voltage on a single polarity-marked polarity designator (the R1 suffix on this code), making it suitable for AC lines or bidirectional bus protection without requiring two back-to-back devices.
Junction temperature and thermal margin
The 150°C rating matters for layouts where the TVS sits near other warm components; the clamping event itself raises junction temperature, so adequate copper pad area under the SMC tab is required to keep the TJ margin intact during a surge.
Sourcing and availability
Listed as Active by Panjit — the part is in normal production and sourced through independent distribution.