1snk706411r0000 – zk2.5-sf-r1 pi-spring clamp – fuses – gr

Why Choose the TE Connectivity ZK2.5-SF-R1 PI-Spring Fuse Terminal Block?

The TE Connectivity ZK2.5-SF-R1, part number 1SNK706411R0000, is a compact PI-Spring fuse terminal block with blown-fuse indication designed to combine conductor termination and circuit protection within industrial control panels and automation systems. Part of the TE Connectivity ENTRELEC SNK Series, it accommodates standard 5 × 20 mm fuses and provides convenient DIN rail mounting for organised electrical installations.

The ZK2.5-SF-R1 incorporates a 24–110 V AC/DC blown-fuse indicator, allowing maintenance personnel to identify a failed fuse quickly and simplify fault finding. The fuse is replaceable and is not supplied with the terminal block, allowing the appropriate 5 × 20 mm fuse to be selected for the protected circuit.

With an IEC voltage rating of 500 V and an IEC current rating of 6.3 A, the ZK2.5-SF-R1 is suitable for protected power and signal circuits. Its 6 mm spacing, spring connection system and support for flexible conductors up to 2.5 mm² provide a compact and practical solution for machinery, control cabinets and industrial distribution applications.

Key Advantages

• Combines fuse protection and PI-Spring conductor termination in one DIN rail terminal.
• Integrated 24–110 V AC/DC blown-fuse indicator assists rapid fault identification.
• Designed for standard 5 × 20 mm fuses.
• 500 V IEC voltage rating for industrial power and signal circuits.
• 6.3 A IEC current rating suitable for fused circuit protection.
• Compact 6 mm spacing helps conserve DIN rail space.
• PI-Spring technology provides fast and reliable spring-clamp wiring.

Key Features

• TE Connectivity ENTRELEC SNK Series.
• PI-Spring fuse terminal block.
• 24–110 V AC/DC blown-fuse indicator.
• Suitable for 5 × 20 mm fuse cartridges.
• 2-position terminal configuration.
• 500 V IEC rated voltage.
• 6.3 A IEC rated current.
• 6 kV IEC impulse withstand voltage.
• 6 mm product spacing.
• Flexible conductor capacity from 0.22–2.5 mm².
• Rigid stranded conductor capacity from 0.2–4 mm².
• Compatible with TH35-7.5 and TH35-15 DIN rails.
• Grey and dark grey polyamide housing.
• IP20 protection rating.

Integrated Fuse Protection with Fast PI-Spring Wiring

Fuse terminal blocks combine terminal connection and replaceable overcurrent protection within a compact DIN rail component. The ZK2.5-SF-R1 accepts a standard 5 × 20 mm fuse and incorporates a blown-fuse indicator, allowing a defective circuit to be identified quickly during inspection and maintenance.

The ENTRELEC PI-Spring connection system provides consistent spring contact pressure and efficient conductor termination without conventional screw tightening. Combined with the integrated fuse holder and indicator, this makes the ZK2.5-SF-R1 particularly suitable for protected control, instrumentation and automation circuits where compact installation and straightforward maintenance are important.

Typical Applications

• Fused circuits in industrial control panels.
• PLC and automation control systems.
• Instrumentation and signal circuits.
• Machine building and OEM equipment.
• Power distribution and control cabinets.
• Motor control and auxiliary circuits.
• DIN rail electrical assemblies requiring blown-fuse indication.