Why Choose the TE Connectivity ZK2.5-S PI-Spring Disconnect Terminal Block?
The TE Connectivity ZK2.5-S, manufacturer designation ZK2.5-S-R1, is a compact PI-Spring disconnect terminal block with knife-blade disconnection designed for testing, isolation and circuit distribution in industrial control and marshalling panels. Part of the TE Connectivity ENTRELEC SNK series, this grey terminal combines convenient circuit disconnection with reliable spring-force conductor termination.
Its integrated disconnect blade enables a circuit to be opened without removing connected conductors, simplifying commissioning, testing, troubleshooting and maintenance. The terminal's profile is aligned with compatible ZK2.5-SF fuse terminals, helping create neat and consistent terminal rows in marshalling cabinets and automation systems.
With a 6 mm spacing, the ZK2.5-S is rated at 20 A and 630 V to IEC and accepts rigid stranded conductors up to 4 mm² / 12 AWG. Its grey polyamide housing, IP20 protection and compatibility with standard TH35 DIN rails make it a practical choice for professional industrial wiring applications requiring convenient circuit isolation.
Key Advantages
- Integrated knife-blade disconnect enables convenient circuit isolation without removing conductors.
- PI-Spring connection technology provides fast, secure and consistent conductor termination.
- Ideal for testing, commissioning, troubleshooting and maintenance circuits.
- 20 A IEC current rating for industrial power and signal applications.
- 630 V IEC voltage rating supports demanding control-panel circuits.
- Accepts rigid stranded conductors up to 4 mm² / 12 AWG.
- 6 mm terminal spacing provides a compact DIN rail footprint.
- Profile aligned with ZK2.5-SF fuse terminals for consistent terminal assemblies.
Key Features
- TE Connectivity ENTRELEC SNK series.
- PI-Spring disconnect terminal block.
- Knife-blade / switch disconnect function.
- Two-position, single-level configuration.
- One electrical circuit.
- 6 mm product spacing.
- 20 A rated current to IEC and UL.
- 14 A rated current to CSA.
- 630 V rated voltage to IEC.
- 300 V maximum operating voltage to UL and CSA.
- 300 A short-time withstand current for 1 s.
- 6000 V IEC impulse withstand voltage.
- Grey polyamide insulating housing.
- UL 94 V-0 flammability-rated material.
- IP20 protection.
- Operating temperature range of -55 to +110 °C.
Convenient Circuit Isolation with PI-Spring Technology
Disconnect terminal blocks allow individual circuits to be opened for testing, measurement, commissioning or maintenance without disconnecting the field wiring. The ZK2.5-S incorporates a knife-blade disconnect into a compact PI-Spring terminal, allowing technicians to isolate a circuit quickly while leaving conductors securely terminated.
The ENTRELEC SNK design also aligns the ZK2.5-S profile with the ZK2.5-SF fuse terminal family, helping simplify circuit distribution in marshalling cabinets and supporting consistent terminal-row construction. Its 6 mm footprint and spring-force connections make it especially useful where compact dimensions, efficient wiring and straightforward circuit isolation are required.
Typical Applications
- Industrial control and automation panels.
- Marshalling cabinets and junction panels.
- PLC and distributed I/O circuits.
- Signal testing and measurement circuits.
- Commissioning and maintenance isolation points.
- Process control and instrumentation systems.
- Machine building and OEM electrical equipment.
