1500W bidirectional TVS for automotive transient protection
The 1.5KE33CHE3/73: It clamps at 47.7V maximum with a 26.8V reverse standoff, making it a fit for 24V nominal automotive bus protection where transients can reach the load-dump region. The bidirectional channel means a single device protects both polarities — useful on AC-coupled lines or where the signal swings through zero. The through-hole DO-201AA axial package inserts into a drilled PCB or terminal block; the body is rated for junction temperatures from -55°C to 175°C, covering under-hood and engine-bay thermal profiles.
Clamping voltages and current rating for BOM fit
Breakdown voltage starts at 29.7V minimum, so the device begins conducting before the protected rail exceeds that threshold. With a 26.8V reverse standoff, the TVS draws negligible leakage at the nominal 24V bus voltage.
Obsolete — sourcing through independent channels
Vishay has marked the 1.5KE33CHE3/73 as obsolete. No official successor order code is recorded in the lifecycle entry. For new designs, consider the active 1.5KE series variants from Vishay or a pin-compatible TVS in the same DO-201AA footprint with matching 26.8V standoff and bidirectional polarity. Cross-reference data is maintained at quote time.