The 1.5SMC250: With a 214 V reverse standoff voltage (working voltage), the diode remains transparent below that rail; clamping begins at 225 V minimum breakdown and hard-clamps at 361.2 V maximum, limiting the let-through energy to 4.4 A peak pulse current. This makes it suitable for 240 VAC secondary protection or DC bus clamping in industrial power supplies where the transient energy is well-defined. The single unidirectional channel protects one rail; for bidirectional or AC-coupled lines, two devices back-to-back or a dedicated bidirectional TVS would be needed.
Package and board-fit — DO-214AB (SMC)
The 1.5SMC250 comes in the DO-214AB (SMC) surface-mount package, also referenced as SMCJ by some suppliers. Supplied in Tape & Reel packaging, it is ready for automated pick-and-place assembly. The reel quantity is standard for the SMC package size.