Why Choose the TE Connectivity ZK16-BL PI-Spring Feed-Through Terminal Block?
The TE Connectivity ZK16-BL (1SNK712020R0000) is a high-capacity 16 mm² PI-Spring feed-through terminal block designed for reliable conductor termination in industrial control panels, machinery and electrical distribution systems. Part of the TE Connectivity ENTRELEC SNK series, it combines fast push-in spring connection technology with a robust DIN rail mounting format for efficient industrial wiring.
The ZK16-BL provides two connection positions on one level and one electrical circuit. Its PI-Spring connection system maintains consistent spring pressure on connected conductors, helping provide dependable electrical contact without the routine retightening associated with conventional screw-clamp terminals. The design accommodates a broad range of conductor types and sizes for flexible panel construction.
With a 16 mm² conductor area, 76 A IEC rated current and 1000 V IEC voltage rating, the ZK16-BL is suitable for demanding industrial power and control circuits. Its blue polyamide housing, 12 mm spacing and compatibility with standard TH35 DIN rails make it a practical solution for clearly identified, higher-current connections within electrical assemblies.
Key Advantages
- High-capacity 16 mm² PI-Spring feed-through terminal block for industrial wiring.
- 76 A IEC current rating supports demanding power distribution applications.
- 1000 V IEC voltage rating for industrial power and control systems.
- PI-Spring connection technology provides fast and secure conductor termination.
- Accepts flexible conductors up to 16 mm² and rigid stranded conductors up to 25 mm².
- Compact 12 mm terminal spacing helps optimise DIN rail installation space.
- Spring-pressure termination eliminates routine screw-terminal retightening.
- Blue housing provides clear visual circuit identification within terminal assemblies.
Key Features
- TE Connectivity ENTRELEC SNK series.
- ZK16-BL PI-Spring terminal block.
- Feed-through terminal function.
- 2 connection positions.
- 1 circuit and 1 level.
- 16 mm² conductor area.
- 76 A IEC rated current.
- 75 A UL / CSA rated current.
- 1000 V IEC voltage rating.
- 600 V UL / CSA voltage rating.
- 1920 A short-time withstand current for 1 s.
- Flexible conductor capacity from 0.5–16 mm².
- Rigid stranded conductor capacity from 0.5–25 mm².
- 12 mm product spacing.
- DIN rail mounting on TH35-7.5 and TH35-15 rails.
- IP20 protection and UL 94V-0 housing flammability rating.
High-Current PI-Spring Connections for Industrial Wiring
PI-Spring terminal technology combines rapid conductor installation with consistent spring-force contact pressure. The spring mechanism maintains reliable pressure on the installed conductor without depending on screw torque, helping provide dependable electrical continuity while reducing installation and ongoing maintenance requirements.
The ZK16-BL is particularly suited to higher-current circuits requiring larger conductor sizes. Its ability to accommodate flexible conductors up to 16 mm² and rigid stranded conductors up to 25 mm², combined with its 76 A IEC current rating, makes it a practical connection solution for industrial power distribution, machinery and control-panel applications.
Typical Applications
- Industrial control panels and switchgear assemblies.
- Higher-current power distribution circuits.
- Machine building and OEM electrical systems.
- Industrial automation and control cabinets.
- Manufacturing and process equipment.
- DIN rail mounted electrical distribution assemblies.
