Why Choose the TE Connectivity ZK2.5-S-BL 1SNK705320R0000 PI-Spring Disconnect Terminal?
The TE Connectivity ZK2.5-S-BL 1SNK705320R0000 is a compact PI-Spring disconnect terminal block with blade disconnect designed for circuit isolation, testing and measurement in industrial control panels and automation systems. As part of the TE Connectivity ENTRELEC SNK series, it combines efficient spring connection technology with a disconnect function that allows circuits to be conveniently opened for testing, commissioning and maintenance.
The ZK2.5-S-BL features two connection positions, one circuit and a single-level design. Its integrated blade disconnect provides a practical method of isolating the circuit without removing conductors, making the terminal particularly useful in control, instrumentation and measurement applications. The blue polyamide housing provides clear circuit identification, while the compact 5.2 mm spacing supports high-density DIN rail installations.
With an IEC rated current of 20 A and rated voltage of 630 V, the ZK2.5-S-BL provides dependable electrical performance for industrial wiring. It accepts flexible conductors from 0.22–2.5 mm² and rigid stranded conductors from 0.2–4 mm², while its DIN rail format enables straightforward integration into electrical cabinets and machinery control systems.
Key Advantages
- Integrated blade disconnect function enables convenient circuit isolation for testing and maintenance.
- PI-Spring connection technology provides fast, secure and vibration-resistant conductor termination.
- 20 A IEC rated current suitable for industrial control, instrumentation and measurement circuits.
- 630 V IEC rated voltage for demanding industrial electrical applications.
- Compact 5.2 mm terminal spacing helps maximise wiring density on the DIN rail.
- Blue housing provides clear identification within organised terminal assemblies.
Key Features
- TE Connectivity ENTRELEC SNK series.
- PI-Spring disconnect terminal block.
- Integrated blade disconnect for circuit isolation.
- Two-position, single-circuit configuration.
- 20 A IEC rated current.
- 630 V IEC rated voltage.
- 20 A UL rated current.
- 300 V UL / CSA operating voltage rating.
- 300 A short-time withstand current at 1 s.
- 6000 V IEC impulse withstand voltage.
- Compatible with TH35-7.5 and TH35-15 DIN rails.
- Blue polyamide housing with UL 94V-0 flammability rating.
Reliable Circuit Isolation for Industrial Control Systems
Disconnect terminal blocks such as the TE Connectivity ZK2.5-S-BL allow an electrical circuit to be opened at the terminal without disconnecting the installed wiring. The integrated blade disconnect makes circuit isolation straightforward, supporting efficient testing, fault finding, commissioning and maintenance within industrial control and instrumentation systems.
PI-Spring technology provides consistent spring pressure on connected conductors, helping maintain reliable electrical contact in demanding industrial environments. Combined with the disconnect functionality and compact DIN rail format, the ZK2.5-S-BL provides a practical solution for applications where convenient circuit isolation and high wiring density are required.
Typical Applications
- Industrial control panels and electrical cabinets.
- Instrumentation and measurement circuits.
- PLC and industrial automation wiring.
- Control circuit isolation and testing.
- Commissioning and fault-finding circuits.
- Industrial machinery and production equipment.
- OEM equipment and industrial panel building.
