What this 1.5KE7.5A_R2_00001 protects
The 6.4 V reverse standoff voltage means the diode stays out of the circuit below that level — it only starts conducting when the line exceeds 7.13 V breakdown. That makes it a fit for protecting 5 V logic or a 6 V bus from inductive kickback, ESD, or lightning-induced transients in general-purpose equipment.
Package and temperature envelope
Housed in a DO-201AE axial-lead through-hole package, the 1.5KE7.5A_R2_00001 is hand-solderable and fits standard 0.100-inch pitch prototyping boards — no special reflow profile needed. The operating junction temperature range spans -65°C to 175°C, so it survives both cold storage and hot power-supply environments. The single unidirectional channel means it protects one polarity; for AC or bidirectional lines you would need two back-to-back or a dedicated bidirectional part. Power line protection is not listed, so this part is best suited for signal or low-voltage DC bus clamping rather than mains-side suppression.
The DO-201AE package and 1.5KE series footprint are common, so a parametric cross to another manufacturer's 1.5KE7.5A (same standoff and package) is possible — confirm the clamping voltage and peak current match your BOM requirement before substituting.