What the ratings mean for the circuit
The 1.5KE82CA_R2_00001: The 70.1V reverse standoff voltage means the device does not conduct at normal rail voltage up to that level — it sits transparently across the line until a transient exceeds the threshold. That clamp voltage is what the downstream circuitry must survive — if the protected IC's absolute maximum rating is below 113V, this TVS alone may not be sufficient. In a high-temperature environment like an engine bay or industrial oven, the derating of peak pulse power with temperature must be factored in — the 1500W rating is at 25°C.