Transient protection headroom and clamping floor
The 1.5KE130A-E3/73: The 1.5KE130A-/73 is a 1500 W peak-pulse-power TVS from Vishay's TransZorb series, rated for the 10/1000 µs waveform. Its 111 V reverse standoff voltage lets it sit across a 100 V DC rail without conducting leakage, while the 124 V minimum breakdown ensures the avalanche triggers before the rail sees damaging overvoltage. At the 8.4 A peak pulse current the clamp voltage is 179 V maximum — this is the voltage the protected circuit must survive. The unidirectional configuration (single channel) clamps only one polarity; for AC or bidirectional lines you need the bidirectional variant of the same family.
Board-fit and thermal envelope
Housed in the DO-201AA (DO-27) axial leaded package, the part mounts through hole — the leads are formed for insertion into 1.0 mm diameter plated-through holes on a standard PCB or turret terminal. The junction temperature range spans -55°C to +175°C, covering military and industrial ambient extremes without derating the pulse power at the high end. The 1500 W rating is a peak value at 25°C; above 25°C the power must be derated linearly per the TransZorb datasheet curve. For sustained repetitive pulses, calculate the average power dissipation and compare against the thermal impedance of the lead-to-board solder joint.
Sourcing and compliance posture
Vishay General Semiconductor lists the part for general-purpose applications. No specific automotive, military, or space-grade qualification is stated in the record; the -55°C to +175°C temperature range suggests suitability for industrial and some defense environments, but the buyer should verify the required screening level (e.g., JAN, DESC) separately.