Surge protection window and what it means for your rail
The 1.5KE170CA A0G: Its 162V minimum breakdown voltage ensures the device stays off during normal operation, while the 234V maximum clamping voltage at 6.7A peak pulse current (10/1000µs waveform) defines the upper bound the protected circuit must survive.
Package and board integration
Housed in a DO-201AA (DO-27) axial leaded package, the 1.5KE170CA A0G mounts through-hole — the lead spacing and body diameter match legacy PCB layouts common in 48V telecom boards and 120VAC secondary-side protection. The Tape & Box (TB) packaging suits hand-insertion or selective wave solder; the axial leads require no special footprint beyond standard 0.100-inch pitch holes. No power line protection rating flags this for signal and DC bus protection, not AC mains — keep it downstream of the fuse or breaker.