Clamping voltage and the protection window
The 1.5KE170CAE3/TR13: Its 145 V reverse standoff means the protected line sees no leakage at normal operating voltage up to that level; the 161 V minimum breakdown triggers clamping at 234 V maximum, which is the voltage the downstream components must survive without damage.
Lifecycle and sourcing — obsolete, but available
Microsemi lists this part as Obsolete. No official successor is recorded, so the supply path is through independent surplus and broker channels.
Package and field-fit notes
Through-hole DO-201AA axial package (CASE-1 supplier device package). The bidirectional channel means orientation is non-polarized — no risk of reversing it on the board, which is a practical advantage when swapping in the field without a schematic in hand.
Rated for -65°C to 150°C junction temperature, covering the full military-grade thermal envelope.