TVS diode for 256V rail protection
The 1.5KE300CA-E3/54: The Vishay 1.5KE300CA-/54 is a bidirectional TransZorb® TVS diode from the 1.5KE series, designed to clamp transients on DC power rails and signal lines.
Clamping voltage and thermal limits for BOM fit
The 414V maximum clamping voltage at 3.6A peak pulse current defines the upper voltage stress the downstream circuitry must survive — any component on the protected rail should have a breakdown rating above this level to avoid secondary failure. Operating junction temperature range spans -55°C to 175°C, making the 1.5KE300CA-/54 suitable for harsh thermal environments including engine compartments, avionics bays, and outdoor telecom enclosures where ambient temperatures can exceed 85°C. The DO-201AA axial package supports through-hole mounting, which provides superior mechanical retention under vibration compared to surface-mount alternatives — a consideration for high-reliability and defense applications.
Obsolete status and sourcing path
Vishay has marked the 1.5KE300CA-/54 as obsolete, meaning the manufacturer no longer produces this exact order code. No official successor part number has been recorded for this specific variant. Through independent distribution channels, we maintain access to new-old-stock and surplus inventory of this TVS diode. Availability and pricing are confirmed at RFQ time against the buyer's required quantity.