What the 1N6267A-E3/73 is and why it survives transients
The 1N6267A-/73 is a unidirectional TransZorb® TVS diode — a Zener-type transient voltage suppressor that clamps overvoltage spikes to a defined ceiling while conducting the surge energy to ground. The 1.5 kW peak pulse rating (10/1000 µs waveform) is the headline figure: it tells you the device survives a single 1.5 kW transient without degradation, and the 143 A peak pulse current confirms it can handle the current magnitude that a real surge injects into the circuit.
Three voltage specs, one selection decision
The reverse standoff voltage of 5.8 V is the working rail the protected line normally sees — the TVS stays reverse-biased and invisible until a fault arrives. At 6.45 V breakdown, the device begins conducting; the clamping voltage of 10.5 V at peak pulse current is the ceiling the downstream load never exceeds during a transient event. For a 5 V rail, the 5.8 V standoff gives roughly 13 % margin above the working voltage — adequate for most industrial environments, though a 1N6268 (higher standoff) is the natural next step if you need more headroom.
Junction temperature range and the through-hole fit
The -55 °C to 175 °C junction temperature rating is wide for a general-purpose TVS — the upper bound means the device tolerates self-heating during prolonged clamping events without the junction temperature rising past the reliability ceiling. The DO-201AA (DO-27) axial through-hole package mounts in a standard 0.4-inch lead spacing footprint — the body sits off-board with both leads in plane, which helps thermal conduction along the leads into the PCB pad and the chassis plane.
Tape & Box packaging — what the storeroom needs to know
The -/73 suffix designates tape & box per EIA-481; the component leads are formed to the tape pitch and the reel is boxed for through-hole insertion equipment. No moisture sensitivity rating is listed for this package — the DO-201AA is not a plastic surface-mount part, so dry storage is not a constraint the way it is for MSL-rated SMD reels.