Parametric fit — 1500 W Zener TVS for 138 V rails
The 1.5KE170CHE3/54: Its 138 V reverse standoff voltage protects a 138 V nominal DC bus — the TVS remains non-conducting below that rail, then clamps at a maximum 244 V @ Ipp to shunt the surge away from downstream silicon. With a breakdown voltage minimum of 153 V and a peak pulse current rating of 6.1 A, this part is sized for moderate-energy transients on automotive or industrial power rails — not for continuous overvoltage or high-repetition events.
AEC-Q101 qualification and temperature envelope
The operating junction temperature range spans -55 °C to 175 °C, covering the full automotive temperature grade 0 band and providing margin for engine-bay or transmission-adjacent placement. The TransZorb® structure is a glass-passivated junction in a DO-201AA (DO-27) axial-lead package. Through-hole mounting suits point-to-point wiring or PCB layouts where surface-mount TVS footprint constraints are not a concern.
Obsolete — sourcing through independent channels
Vishay has marked the 1.5KE170CHE3/54 as obsolete. Quantities are lot-specific; availability and pricing are confirmed at RFQ. No pin-compatible replacement from the original manufacturer has been designated.