Clamping voltage and the protection window
The 1.5SMB62CA: Its 58.9 V minimum breakdown voltage means it starts conducting just above the normal operating level, and the 85 V maximum clamp at 17.9 A peak pulse current (10/1000 µs waveform) defines the voltage the downstream circuitry must survive. The single bidirectional channel protects one signal pair or a single-ended line referenced to ground.
Housed in the DO-214AA (SMB) package, the 1.5SMB62CA is a surface-mount device with a low-profile body suited for dense PCB layouts. The supplier device package is also listed as DO-214AA (SMBJ), so the footprint and thermal pad match the standard SMB land pattern. Its operating temperature range spans -65°C to 150°C junction, covering outdoor telecom cabinets and industrial enclosures without derating concerns. The part does not include power line protection — it is intended for signal and low-power supply rail clamping.