Why Choose the TE Connectivity ZK4-3P-BL PI-Spring Terminal Block?
The TE Connectivity ZK4-3P-BL (1SNK706021R0000) is a blue PI-Spring feed-through terminal block with three connection positions, designed for efficient conductor distribution and branching in industrial control panels, machinery and electrical distribution systems. Part of the ENTRELEC SNK Series, it combines reliable spring connection technology with a compact DIN rail-mounted format.
Unlike a conventional two-connection feed-through terminal, the ZK4-3P-BL provides three spring-clamp connection positions on one electrical circuit. This allows three conductors to be connected together at a single terminal point, simplifying applications where power or signals need to be distributed or branched without adding separate terminals or additional external wiring.
With a rated cross-section of 4 mm², an IEC current rating of 32 A and IEC voltage rating of 1000 V, the ZK4-3P-BL provides substantial electrical capability within a compact 6 mm terminal width. Its blue housing is particularly useful where colour-coded circuit identification is required, while compatibility with standard TH35 DIN rails enables straightforward integration into industrial panel assemblies.
Key Advantages
- Three connection positions allow convenient distribution or branching of three conductors.
- PI-Spring connection technology provides fast and secure conductor termination without conventional screw tightening.
- 4 mm² rated cross-section supports common industrial power and control wiring.
- 32 A IEC current rating provides dependable capacity for demanding circuits.
- 1000 V IEC voltage rating supports a broad range of industrial electrical applications.
- Compact 6 mm spacing helps maximise available DIN rail space.
- Blue housing provides clear visual identification within organised electrical panels.
Key Features
- TE Connectivity ENTRELEC SNK Series.
- ZK4-3P-BL PI-Spring feed-through terminal block.
- Three connection positions on one circuit.
- Single-level terminal configuration.
- 4 mm² rated cross-section.
- 6 mm product spacing.
- 32 A IEC rated current.
- 1000 V IEC rated voltage.
- 30 A UL and CSA current rating.
- Rigid conductor capacity up to 6 mm².
- Flexible conductor capacity up to 4 mm².
- Blue polyamide housing with UL 94V-0 flammability rating.
- IP20 protection rating.
- Compatible with standard TH35-7.5 and TH35-15 DIN rails.
Reliable Three-Conductor Distribution for Industrial Wiring
The TE Connectivity ZK4-3P-BL combines the electrical characteristics of a feed-through terminal with the convenience of three conductor connection points. Connecting all three positions within one circuit makes it possible to distribute or branch power and signals directly at the terminal, helping reduce additional wiring and simplify panel layouts.
PI-Spring technology maintains conductor contact through spring force rather than relying on conventional screw tightening. Together with its compact DIN rail format, wide conductor compatibility and clear blue housing, the ZK4-3P-BL provides a practical connection solution for machine builders, panel builders and industrial automation installations.
Typical Applications
- Industrial control panels and switchgear assemblies.
- Power and signal distribution circuits.
- PLC and automation control cabinets.
- Three-conductor branching and distribution points.
- Machine building and OEM electrical systems.
- Process control and instrumentation panels.
- Building automation and electrical distribution equipment.
