1snk506412r0000 – zs4-sf-r1 [pk=50] fuse terminal block

Why Choose the TE Connectivity ZS4-SF-R1 Fuse Terminal Block?

The TE Connectivity ZS4-SF-R1 is a compact screw clamp fuse terminal block with an integrated red LED blown-fuse indicator, designed to provide circuit protection and rapid fault identification in industrial control panels, machinery and automation systems. Part of the TE Connectivity ENTRELEC SNK terminal block series, it accepts standard 5 × 20 mm cartridge fuses and provides protected termination within a space-saving 6 mm footprint.

The ZS4-SF-R1 incorporates a red LED indicator rated for 24–110 V, allowing maintenance personnel to quickly identify a blown fuse and locate a defective circuit. Its two jumper channels align with compatible ZS4 feed-through and ZS4-S-R1 disconnect terminal blocks, simplifying potential distribution across modular terminal assemblies.

With an IEC current rating of 6.3 A, an IEC voltage rating of 500 V and a rated cross-section of 4 mm², the ZS4-SF-R1 provides dependable protection for control, instrumentation and auxiliary circuits. Its grey and dark-grey polyamide housing, screw clamp termination and DIN rail mounting make it well suited to professional industrial panel construction.

Key Advantages

• Integrated 5 × 20 mm fuse holder provides convenient individual circuit protection.
• Red LED blown-fuse indicator rated for 24–110 V enables rapid fault identification.
• Compact 6 mm terminal spacing supports high-density panel wiring.
• 6.3 A IEC current rating for protected control and auxiliary circuits.
• 500 V IEC voltage rating for industrial electrical installations.
• Reliable screw clamp connection technology provides secure conductor termination.
• Two jumper channels simplify potential distribution across compatible SNK terminal blocks.
• Designed for fuse protection in accordance with IEC 60947-7-3.

Key Features

• TE Connectivity ENTRELEC SNK series.
• Screw clamp fuse terminal block.
• Designed for 5 × 20 mm cartridge fuses.
• 24–110 V red LED blown-fuse indicator.
• Indicator leakage current of less than 0.5 mA.
• Two connection positions and one electrical circuit.
• Single-level construction.
• 4 mm² rated cross-section.
• 6 mm product spacing.
• 6.3 A rated current to IEC.
• 500 V rated voltage to IEC.
• 6000 V IEC impulse withstand voltage.
• Grey and dark-grey polyamide housing.
• Suitable for TH35-7.5 and TH35-15 DIN rails.

Circuit Protection with Rapid Fault Identification

Fuse terminal blocks combine conductor termination and replaceable overcurrent protection within a single DIN rail component. The ZS4-SF-R1 adds an integrated red LED indicator, allowing a blown fuse to be identified quickly and helping maintenance teams reduce troubleshooting time when servicing industrial electrical equipment.

The ENTRELEC SNK platform is designed for modular panel construction, and the ZS4-SF-R1 incorporates two jumper channels aligned with compatible feed-through and disconnect terminals. This allows protected circuits to be integrated neatly into larger terminal assemblies while maintaining straightforward potential distribution and service access.

Typical Applications

• Industrial control panels and electrical cabinets.
• PLC input and output circuit protection.
• Machine building and OEM automation equipment.
• Instrumentation and process control systems.
• Protected signalling and auxiliary circuits.
• Motor control and distribution panels.
• Circuits requiring visual blown-fuse indication.