What this Zener TVS does in your circuit
The 1N6465US/TR is a unidirectional Zener TVS diode from Microchip Technology, designed to clamp transients on a 24 V rail. With a peak pulse power rating of 500 W, it handles surge energy that would otherwise damage downstream silicon. The 27 V minimum breakdown voltage ensures the device starts conducting before the rail exceeds safe limits. The 12 A peak pulse current rating defines the maximum surge the diode can absorb without failing — useful for sizing the protection for a given transient environment on a 24 Vdc supply input.
Temperature range and mounting
The device operates from -55 °C to 175 °C junction temperature, covering automotive under-hood, industrial outdoor, and military-grade environments. The SQ-MELF B package is a surface-mount, ceramic-bodied cylindrical case — its low thermal resistance suits high-reliability applications where board space is tight and the solder joint is inspected by X-ray. Mounting is surface mount, and the package is supplied in Tape & Reel (TR) or Cut Tape (CT) options for pick-and-place assembly.
Lifecycle and sourcing posture
This is a current-production part, not a discontinued or NRND device.