Why Choose the TE Connectivity ZK2.5-D1-PE PI-Spring Ground Terminal Block?
The TE Connectivity ZK2.5-D1-PE (1SNK705250R0000) is a compact double-deck PI-Spring ground terminal block designed to provide reliable protective-earth connections in industrial control panels, machinery and electrical distribution systems. Part of the TE Connectivity ENTRELEC SNK series, this green-and-yellow terminal combines spring connection technology with a screwless rail contact for dependable grounding on standard DIN rails.
The ZK2.5-D1-PE incorporates one protective-earth circuit across a two-level, four-position configuration. Its screwless rail contact is designed to provide a secure connection to the mounting rail without relying on operator-applied tightening torque, helping improve installation consistency and electrical safety. The terminal profile is aligned with ZK2.5-D2 double-deck terminals, allowing coordinated installation within high-density terminal assemblies.
With a compact 5.2 mm spacing, conductor capacity up to 4 mm² for rigid stranded conductors and a short-time withstand current rating of 300 A for 1 s, the ZK2.5-D1-PE provides a robust protective-earth connection while minimising DIN rail space. Its standard green-and-yellow housing makes the protective-earth function immediately identifiable during installation, inspection and maintenance.
Key Advantages
- Dedicated protective-earth terminal block for industrial grounding applications.
- PI-Spring connection technology provides secure conductor termination without conventional terminal screws.
- Screwless rail contact provides a dependable connection to the DIN rail.
- Double-deck profile supports space-efficient terminal assemblies.
- Compact 5.2 mm spacing helps maximise available DIN rail space.
- Accepts rigid stranded conductors up to 4 mm².
- Green-and-yellow housing provides immediate protective-earth identification.
- Profile aligned with ZK2.5-D2 terminals for organised panel construction.
Key Features
- TE Connectivity ENTRELEC SNK ZK series.
- ZK2.5-D1-PE protective-earth terminal block.
- PI-Spring connection technology.
- 1 ground circuit.
- 2 levels and 4 positions.
- 5.2 mm product spacing.
- 300 A short-time withstand current for 1 s.
- 8 kV IEC impulse withstand voltage.
- Flexible conductor capacity from 0.22–2.5 mm².
- Rigid stranded conductor capacity from 0.2–4 mm².
- Compatible with TH35-7.5 and TH35-15 DIN rails.
- IP20 protection rating.
- UL 94V-0 polyamide housing.
Reliable Protective-Earth Connections for Industrial Wiring
Protective-earth terminal blocks provide the essential connection between equipment conductors and the grounded DIN rail or protective-earth system. The ZK2.5-D1-PE uses a screwless rail contact designed to create a secure protective-earth connection when the terminal is mounted, reducing dependence on operator-applied tightening torque and supporting consistent panel assembly.
Its PI-Spring conductor connections maintain spring pressure on installed wires, while the double-deck profile and narrow 5.2 mm spacing help optimise available panel space. The green-and-yellow housing follows established protective-earth identification conventions, allowing grounding circuits to be recognised quickly during installation, testing and maintenance.
Typical Applications
- Protective-earth connections in industrial control panels.
- Machinery and OEM electrical systems.
- PLC and automation control cabinets.
- Industrial switchgear and distribution assemblies.
- Equipment grounding and bonding circuits.
- Manufacturing and process automation installations.
