1snk508416r0000 – zs4-s-r3 [pk=50] switch terminal block

Why Choose the TE Connectivity ZS4-S-R3 1SNK508416R0000 Disconnect Terminal Block?

The TE Connectivity ZS4-S-R3 1SNK508416R0000 is a compact 4 mm² grey and orange screw-clamp disconnect terminal block designed for controlled circuit isolation in industrial control panels, instrumentation systems and automation equipment. Part of the TE Connectivity ENTRELEC SNK series, it combines secure screw-clamp conductor termination with an integrated lever disconnect for convenient commissioning, testing and maintenance.

The ZS4-S-R3 is designed with a profile aligned to the ZS4-SF1 fuse terminal block, helping simplify installations where disconnect and fused circuits are arranged alternately. Its disconnect lever is easily operated by hand, while the supplied CN5 5 × 25 neutral cartridge supports its use as a switchable disconnect point without requiring a fuse element.

With an IEC rated current of 18 A and an IEC rated voltage of 630 V, the ZS4-S-R3 provides dependable circuit isolation for industrial control and signal wiring. Its 8 mm spacing, two-position configuration and standard TH35 DIN-rail mounting make it well suited to compact, organised and serviceable terminal assemblies.

Key Advantages

• Integrated lever disconnect enables convenient circuit isolation without removing conductors.
• Disconnect lever is designed for straightforward hand operation.
• Profile aligns with the ZS4-SF1 fuse terminal block for organised mixed-function assemblies.
• Supplied with a CN5 5 × 25 neutral cartridge.
• Accepts flexible conductors from 0.22–4 mm² and rigid stranded conductors from 0.2–4 mm².
• 18 A IEC rated current and 630 V IEC rated voltage.
• Compact 8 mm terminal spacing supports efficient DIN-rail layouts.
• Supplied in a pack quantity of 50 for production and panel-building requirements.

Key Features

• TE Connectivity ENTRELEC SNK series.
• ZS4-S-R3 disconnect terminal block.
• Proven screw-clamp connection technology.
• Lever-type disconnect mechanism.
• 2 connection positions.
• Flexible conductor capacity of 0.22–4 mm².
• Rigid stranded conductor capacity of 0.2–4 mm².
• 11 mm wire stripping length.
• 8 mm product spacing.
• Compatible with TH35-7.5 and TH35-15 DIN rails.
• Grey and orange polyamide housing.
• IP20 protection rating.
• UL 94V-0 flammability-rated housing.
• Operating temperature range of -55 to +110 °C.

Convenient Lever Isolation Alongside Fuse Terminals

The ZS4-S-R3 provides a practical way to open an electrical circuit directly at the terminal strip while leaving the permanent field conductors securely connected. Its integrated lever is designed for convenient hand operation, helping technicians isolate circuits efficiently during commissioning, measurement, troubleshooting and scheduled maintenance.

A key feature of the ZS4-S-R3 is its profile alignment with the ZS4-SF1 fuse terminal block. This makes alternating disconnect and fuse circuits easier to wire and organise within the same terminal assembly. The included CN5 5 × 25 neutral cartridge provides a conductive link for normal switch-block operation, while the lever enables intentional circuit disconnection when required.

Typical Applications

• Industrial control panels and automation cabinets.
• Instrumentation and measurement circuits.
• PLC input and output wiring.
• Signal and control circuit isolation.
• Alternating fuse and disconnect terminal assemblies.
• Testing, commissioning and troubleshooting circuits.
• Process automation and marshalling cabinets.
• Machine building and OEM electrical systems.