The Phoenix Contact UFBK 4-PE-HB-BE surge protection base element is a robust, DIN-rail-mountable foundation for modular overvoltage protection in control cabinets and building services. Designed for two plug-in protectors (UFBK and UFBK-M) with HB surge protection, it supports 3-/4-wire floating circuits and fits neatly with a compact 30 mm module width on NS 32 or NS 35/7.5 rails, making it ideal for industrial automation and panel builders seeking reliable, scalable SPD solutions.

Engineered for service efficiency and uptime, the plug-in concept enables quick replacement of surge protection modules without rewiring, while clear terminal layout supports clean, compliant installation practices. The durable PA housing meets UL 94 V2 flammability requirements, the operating temperature range of -40 °C to 60 °C ensures dependable performance in harsh environments, and an 8 mm strip length simplifies consistent conductor preparation across projects.

Whether used in new builds or retrofits, this base element streamlines installation, reduces maintenance time, and helps safeguard sensitive equipment against transient overvoltages—delivered with a 1-year warranty to provide additional assurance throughout the product lifecycle.

• Brand: Phoenix Contact
• Series: UFBK
• Model: UFBK 4-PE-HB-BE (2817754)
• Mounting: DIN rail NS 32 or NS 35/7.5
• Circuit type: 3-/4-wire floating circuits
• Compatible plug-in modules: UFBK, UFBK-M
• Module width: 30 mm
• Operating temperature: -40 °C to 60 °C