Diodes Incorporated has marked the 1.5KE400CA-T as obsolete. For an existing BOM line that calls out this exact part number, the sourcing path runs through independent distribution surplus or broker inventory.
Key protection ratings and what they mean
The minimum breakdown voltage is 380 V, and the clamping voltage at the 4 A peak pulse current is 548 V max. Single bidirectional channel means a single device protects both polarities — useful on AC signal or power lines where the surge can swing positive or negative.
Package and board integration
Housed in a DO-201AA / DO-27 axial-lead package, also referred to as the DO-201 supplier device package. The through-hole mounting is a manual-insertion process — no reflow profile to manage, but the axial leads need lead-forming for PCB or point-to-point wiring. Supplied on Tape & Reel, which is atypical for an axial-lead part — the reel format suits automated insertion or kitting rather than bulk bag. Confirm the feeder or cut-tape requirement with your assembly house. The operating junction temperature range spans -55°C to +175°C, covering industrial and some military-grade thermal environments.