The 1.5SMC480C is officially listed as Obsolete by Littelfuse. For new designs or BOM continuity, this part is sourced through independent distribution channels.
1500 W peak pulse — what it means for the clamping decision
The reverse standoff voltage is 408 V, with breakdown guaranteed between 432 V and the clamping ceiling — this window defines the protection threshold for a 400 V nominal DC bus or AC line rectified rail. Bidirectional construction (one channel) means the device clamps symmetrically in both polarities — no need to orient the part on the board for reverse-voltage events, which simplifies layout for AC-coupled or bipolar signal lines.
DO-214AB footprint and board integration
The standard JEDEC footprint for this body size is 8.0 mm × 5.6 mm with a cathode-band indicator — the bidirectional part has no polarity mark, so the silkscreen should show a generic TVS symbol. The 150°C TJ ceiling means the junction can absorb repetitive pulses as long as the average power dissipation stays within the thermal impedance of the SMC package's copper pad area.