Transient suppressor for 6.4 V rails — what the ratings mean
The P6KE7.5AG: It clamps transients above the normal DC rail level without conducting during steady-state operation — a fit for general-purpose protection on supply lines where the steady voltage stays under 6.4 V. The clamping voltage at peak pulse current is 11.3 V max, and the device can handle a peak pulse current of 53 A (8/20 µs waveform). These numbers define the voltage the protected circuitry must survive during a surge event.
onsemi lists the P6KE7.5AG as Obsolete. For BOM lines that still call out this exact order code, the practical sourcing route is independent distribution — where remaining factory inventory or surplus stock may still be available. We source per RFQ; confirm date code and quantity against your requirement before committing. Validate the replacement against the original clamping voltage and peak pulse current before changing the BOM.
Package and temperature — fit for through-hole assembly
The axial package is a through-hole form factor that solders into a single hole per lead — no footprint surprises for legacy boards. The device is unidirectional — it protects against positive transients only. If your circuit sees bidirectional surges (e.g., AC lines or signal pairs), two devices back-to-back or a bidirectional TVS is required.