Black Box SP508A Surge Protector

The Black Box SP508A is a serial surge protector designed to guard RS-422/RS-423/RS-485 networks from transient surges and electrical noise on multi‑wire serial links used in industrial environments, process control, and data acquisition systems. It provides a clamp voltage of 7.5 V DC and can absorb a peak pulse current of 132 A across 15 protected conductors, limiting overvoltage exposure to sensitive transceivers, controllers, and terminal devices during surge events on long cable runs. The protector is purpose‑built for RS-422/RS-423/RS-485 signaling, delivering reliable protection for serial links where data integrity is critical in automation, telemetry, and remote sensing applications. It provides protection without altering the protected equipment's operation or signaling standards, making it suitable for installations in rugged industrial settings that require consistent RS-422/RS-423/RS-485 performance.