Active production — 1500 W axial TVS for general-purpose transient suppression
The 1.5KE170A/B: With a 145 V reverse standoff voltage and 234 V maximum clamping at 6.5 A peak pulse current, it protects downstream silicon from transients on 120 VAC or 145 VDC rails where the normal operating voltage stays below the standoff threshold.
Clamping voltage and pulse current — the real protection envelope
The 234 V clamp at 6.5 A (10/1000 µs) defines the voltage the protected circuit must survive — downstream components need a breakdown rating above this ceiling, not just the standoff voltage. Single unidirectional channel — the cathode band marks the anode; reverse polarity protection requires a second device or a bridge arrangement.
DO-201 axial — board-fit and replacement considerations
The DO-201AA (DO-27) axial leaded package suits point-to-point wiring, terminal blocks, or through-hole PCB layouts where the lead bend radius and hole diameter (typically 1.0–1.3 mm) must match the assembly process. No power line protection rating — this device is intended for signal and low-power rail transient clamping, not primary AC mains suppression.