1snk506413r0000 – zs4-sf-r2 [pk=50] fuse terminal block

Why Choose the TE Connectivity ZS4-SF-R2 1SNK506413R0000 Fuse Terminal Block?

The TE Connectivity ZS4-SF-R2 1SNK506413R0000 is a compact screw-clamp fuse terminal block designed to combine conductor termination and replaceable fuse protection within a single DIN-rail mounted device. Part of the TE Connectivity ENTRELEC SNK series, it is suitable for protecting control, signal and auxiliary circuits in industrial panels, machinery and automation systems.

The ZS4-SF-R2 is designed for 5 × 20 mm cartridge fuses, providing a convenient means of adding individual circuit protection directly at the terminal strip. Its fuse function simplifies fault isolation and fuse replacement while maintaining an organised, serviceable panel layout. The grey and dark-grey housing also provides clear visual differentiation from standard feed-through terminals.

With 6 mm terminal spacing, two connection positions and a single circuit, the ZS4-SF-R2 offers compact fused connectivity for high-density installations. It has an IEC rated current of 6.3 A and an IEC rated voltage of 500 V, while accepting flexible conductors from 0.22–4 mm² and rigid stranded conductors from 0.2–4 mm².

Key Advantages

• Combines terminal connectivity and fuse protection in one DIN-rail device.
• Designed for readily replaceable 5 × 20 mm cartridge fuses.
• 6.3 A IEC rated current and 500 V IEC rated voltage.
• Accepts conductors up to 4 mm².
• Compact 6 mm terminal spacing supports high-density panel layouts.
• Screw-clamp technology provides secure and serviceable conductor termination.
• Compatible with standard TH35-7.5 and TH35-15 DIN rails.
• Supplied in a pack quantity of 50 for production and panel-building requirements.

Key Features

• TE Connectivity ENTRELEC SNK series.
• ZS4-SF-R2 fuse terminal block.
• Screw-clamp connection technology.
• Designed for 5 × 20 mm fuses.
• 1 circuit, 1 level and 2 connection positions.
• Flexible conductor capacity of 0.22–4 mm².
• Rigid stranded conductor capacity of 0.2–4 mm².
• 10.5 mm wire stripping length.
• 6 mm product spacing.
• Grey and dark-grey polyamide housing.
• IP20 protection rating.
• UL 94V-0 flammability-rated housing.
• Operating temperature range of -55 to +110 °C.

Integrated Fuse Protection for Industrial Control Circuits

Fuse terminal blocks provide circuit protection directly at the terminal strip, reducing the need for separate fuse holders and helping create compact, logically organised panel layouts. The ZS4-SF-R2 accommodates a 5 × 20 mm cartridge fuse, allowing the protected circuit to be serviced at a convenient DIN-rail location.

The screw-clamp connections provide secure conductor termination, while the fuse function makes it easier to identify, isolate and restore individual protected circuits during maintenance. With only 6 mm of terminal spacing, the ZS4-SF-R2 is particularly useful where multiple individually fused circuits must be accommodated within limited panel space.

Typical Applications

• Industrial control panels and automation cabinets.
• PLC input and output circuit protection.
• Instrumentation and measurement circuits.
• Control and signal circuit protection.
• Machine building and OEM electrical systems.
• Process automation and marshalling cabinets.
• Switchgear and electrical distribution assemblies.
• DIN-rail circuits requiring replaceable 5 × 20 mm fuse protection.