Why Choose the TE Connectivity ZK2.5-D1 PI-Spring Double Deck Terminal Block?
The TE Connectivity 1SNK705211R0000 ZK2.5-D1 is a compact PI-Spring double-deck feed-through terminal block designed for high-density industrial control and automation wiring. Part of the TE Connectivity ENTRELEC SNK series, it combines two vertically arranged connection levels with push-in spring technology to provide efficient conductor termination while minimising DIN rail space.
The ZK2.5-D1 features four connection positions across two connected levels, providing one common electrical potential across four independent conductor connections. This configuration is particularly useful for potential distribution and common-circuit wiring, while its compact 5.2 mm spacing allows substantially more connections to be installed within a limited panel width.
Rated at 24 A and 800 V IEC, the ZK2.5-D1 accepts flexible conductors from 0.22–2.5 mm² and rigid stranded conductors from 0.2–4 mm² / 26–12 AWG. Its grey polyamide housing, IP20 protection, UL 94V-0 flammability rating and wide -55–110 °C operating temperature range make it a versatile solution for industrial machinery, control panels and process automation systems.
Key Advantages
- Double-deck design provides four conductor connection points within only 5.2 mm of DIN rail width.
- PI-Spring connection technology enables fast and dependable conductor termination without conventional screw tightening.
- Four connected positions simplify common-potential distribution within industrial control panels.
- 24 A, 800 V IEC rating supports a broad range of industrial power and signal circuits.
- Accepts rigid stranded conductors up to 4 mm² / 12 AWG.
- IP20 and UL 94V-0 construction supports safe, durable installation in professional electrical equipment.
Key Features
- TE Connectivity ENTRELEC SNK series.
- ZK2.5-D1 PI-Spring double-deck terminal block.
- Manufacturer part number 1SNK705211R0000.
- Feed-through block function.
- 2 connected levels for high-density wiring.
- 4 connection positions within one electrical circuit.
- Compact 5.2 mm product spacing.
- 24 A rated current at 800 V IEC.
- 20 A UL and CSA current rating.
- 300 A short-time withstand current for 1 s.
- 8000 V IEC impulse withstand voltage.
- DIN rail mounting on TH35-7.5 and TH35-15 profiles.
High-Density Potential Distribution with PI-Spring Technology
Double-deck terminal blocks increase wiring density by arranging conductor connections vertically rather than using additional DIN rail width. The ZK2.5-D1 provides four connected positions across two levels, allowing a single electrical potential to be distributed to four independent conductors within a compact 5.2 mm footprint.
PI-Spring technology combines push-in wiring convenience with consistent spring-force conductor retention, helping reduce installation time while maintaining dependable electrical contact. The ZK2.5-D1 therefore provides an efficient solution for high-density control panels where common-potential distribution, compact dimensions and straightforward maintenance are important.
Typical Applications
- Industrial electrical control panels.
- PLC and automation system wiring.
- Common-potential and signal distribution.
- High-density double-deck DIN rail assemblies.
- Machine building and OEM electrical systems.
- Process control and instrumentation panels.
- Power and signal distribution circuits.
- Industrial machinery and equipment cabinets.
