Obsolete TVS — last-time-buy sourcing
Vishay has marked the 1.5KE33CAHE3/51 as Obsolete.
Clamping performance and fit
At the clamping voltage of 45.7 V, the TVS handles a peak pulse current of 32.8 A. The reverse standoff voltage is 28.2 V, so the part starts conducting above that rail level and clamps the transient before it reaches the protected circuit's absolute-maximum rating. Breakdown voltage is specified at 31.4 V minimum, giving a 3.2 V guard band between the standoff rail and the avalanche threshold. Operating junction temperature range is -55°C to 175°C, covering the full automotive temperature envelope. The DO-201AA axial-lead package is through-hole mounted — the lead bend and body length are standard for this power class, so existing PCB footprints for a 1.5KE-series device accept it without layout changes.
Sourcing the 1.5KE33CAHE3/51
Because Vishay has discontinued this order code, new-stock procurement goes through independent surplus and broker channels. The base product number is 1.5KE33; the full suffix includes the automotive-grade AEC-Q101 designation and the bulk packaging code. When sourcing, match the full order code — a non-automotive 1.5KE33CA lacks the AEC-Q101 screening and may not meet the same reliability requirements.