EOL — sourcing the 1.5SMC51C through independent channels
For BOM lines that still call out this order code, the available path is the independent surplus and excess-inventory channel.
The 1500 W peak pulse power rating (10/1000 µs waveform) is the device's energy-handling capacity — it tells you how much transient energy the diode can absorb without failing. For a 43.6 V standoff rail, the clamping voltage at 21.7 A peak pulse current is 73.61 V, which means the protected circuitry must survive that voltage spike. The minimum breakdown voltage is 45.95 V, so the rail must stay below that in normal operation.
Package and temperature fit for a rework bench
Supplied on tape and reel, it is ready for pick-and-place assembly in a reflow process. No power line protection feature is built in — this is a general-purpose transient suppressor, not a dedicated AC mains protector.