Transient protection for 24V rails — 1500W bidirectional TVS
The 1.5KE24CA-E3/51: Its 20.5V reverse standoff voltage sits below the rail, so it stays out of the circuit during normal operation, while the 22.8V minimum breakdown triggers clamping before the downstream components see damage.
Last Buy — sourcing through independent channels
The through-hole DO-201AA (DO-27) axial package is straightforward to retrofit into existing boards. No official successor has been announced; for new designs, a current-production bidirectional TVS with equivalent 1500W rating and 24V standoff should be evaluated.
Temperature range and mechanical fit
Mounts through a single axial lead hole on a standard PCB or terminal block — the DO-201AA body is 9.1 mm long and 5.3 mm diameter, with 25.4 mm lead spacing typical. Bulk packaging (/51 suffix) means loose parts for manual or wave-solder assembly.