ABB – 7TCA085400R0320 – OVR SL/B Spare Base for 2‑Wire Signal/Telecom SPD Module

The ABB OVR SL/B (P/N 7TCA085400R0320) is a replacement base module for ABB’s Slim‑Line surge protection system (OVR SL series). Designed for signal and data line protection, this spare base supports two-wire SPD modules such as RS‑485, RTD, and telecom applications. The ultra-slim design and DIN-rail mount make it ideal for dense panel installations.

Key Features:

• Manufacturer: ABB

• Model / P/N: 7TCA085400R0320 (OVR SL/B)  

• Function: Spare base for two‑wire OVR SL data surge protection modules

• Mounting: DIN‑rail clip-on, locking foot, integrates with ABB OVR SL series  

• Compatibility: Works with OVR SL06 to OVR SL180 signal/data SPD modules (e.g., RS‑485, RTD variants)  

• Form Factor: Slim 7 mm width, allows high-density layouts ()

• Terminals: 4 mm² rated screw terminals for signal/equipment lines and earth connection  

• Housing: Flame-retardant polymer (UL‑94 V‑0)  

• Application: Ideal for telecommunication, process control, and industrial data cabling systems