Why Choose the TE Connectivity ZK2.5-S PI-Spring Disconnect Terminal Block?
The TE Connectivity ZK2.5-S 1SNK705310R0000 is a grey PI-Spring disconnect terminal block with blade isolation, designed for control, signal and measurement circuits where convenient circuit disconnection and testing are required. Part of the TE Connectivity ENTRELEC SNK Series, it combines compact spring connection technology with an integrated disconnect blade in a DIN rail mounted format.
The ZK2.5-S features two built-in 2 mm test sockets, enabling convenient current measurement without unnecessarily disturbing the connected conductors. Measurements below 50 mA can be made through the integrated test points, while currents up to 16 A can be measured using the compatible TP4 test adapter inserted into the terminal's jumper channels.
With a compact 5.2 mm pitch, the ZK2.5-S provides a single circuit with two connection positions and is rated at 20 A and 630 V under IEC specifications. It accepts flexible conductors up to 2.5 mm² and rigid stranded conductors up to 4 mm², making it a versatile disconnect solution for industrial power and signal wiring.
Key Advantages
- Integrated blade disconnect allows convenient circuit isolation for testing and maintenance.
- Two built-in 2 mm test sockets support straightforward current measurement.
- PI-Spring technology provides fast and dependable spring conductor termination.
- Compact 5.2 mm pitch helps maximise available DIN rail space.
- 20 A IEC current rating for industrial power and signal circuits.
- 630 V IEC voltage rating supports demanding control and measurement applications.
- Accepts rigid stranded conductors up to 4 mm².
Key Features
- TE Connectivity ENTRELEC SNK Series.
- ZK2.5-S PI-Spring disconnect terminal block.
- Blade disconnect mechanism.
- 2 built-in test sockets, 2 mm diameter.
- Built-in test points support measurements below 50 mA.
- Compatible with TP4 test adapter for current measurement up to 16 A.
- 2 connection positions.
- 1 circuit and 1 level.
- 5.2 mm product spacing.
- 20 A IEC rated current.
- 630 V IEC rated voltage.
- 6,000 V IEC impulse withstand voltage.
- 300 A short-time withstand current at 1 s.
- Grey polyamide housing.
- IP20 protection rating.
- UL 94V-0 flammability rating.
Reliable Disconnect and Test Connectivity
The TE Connectivity ZK2.5-S is designed for circuits that require regular isolation, measurement or fault finding. Its integrated blade disconnect provides a convenient means of opening the circuit without removing field wiring, helping simplify commissioning, maintenance and diagnostic procedures.
Two integrated 2 mm test sockets provide dedicated measurement access, while the terminal's jumper channels can accommodate the TP4 test adapter for measurements up to 16 A. Combined with PI-Spring conductor termination and a compact 5.2 mm footprint, these features make the ZK2.5-S particularly useful in densely wired control, instrumentation and signal cabinets.
Typical Applications
- Industrial control and automation panels.
- Instrumentation and measurement circuits.
- PLC and I/O marshalling cabinets.
- Signal isolation and testing circuits.
- Process control systems.
- Machine commissioning and diagnostic circuits.
- High-density DIN rail terminal assemblies.
