1snk508415r0000 – zs4-sf1-r4 [pk=50] fuse terminal block

Why Choose the TE Connectivity ZS4-SF1-R4 Fuse Terminal Block?

The TE Connectivity ZS4-SF1-R4 is a compact 4 mm² screw clamp fuse terminal block with blown-fuse indication designed for protected power and signal circuits in industrial control panels, machinery and automation systems. Part of the TE Connectivity ENTRELEC SNK terminal block series, it combines replaceable fuse protection, visual fault indication and convenient testing within a space-efficient DIN rail format.

Designed for 5 × 20 mm and 5 × 25 mm fuses, the ZS4-SF1-R4 incorporates a blown-fuse indicator operating at 115–250 V AC/DC. This enables maintenance personnel to identify defective circuits quickly, while two integrated 2 mm test sockets provide convenient access for electrical testing and troubleshooting without disturbing the connected wiring.

With a 4 mm² conductor capacity, 6.3 A IEC current rating and 630 V IEC voltage rating, the ZS4-SF1-R4 is well suited to protected control, signalling and auxiliary circuits. Its 8 mm terminal spacing, grey and dark-grey polyamide housing and standard DIN rail mounting make it a practical solution for professional industrial panel construction.

Key Advantages

• Combines fuse protection, conductor termination and blown-fuse indication in one DIN rail component.
• Accepts 5 × 20 mm and 5 × 25 mm fuses for flexible circuit protection.
• 115–250 V AC/DC blown-fuse indicator enables rapid identification of defective circuits.
• Two integrated 2 mm test sockets simplify measurement and troubleshooting.
• 4 mm² conductor capacity for industrial power and signal wiring.
• 6.3 A, 630 V IEC ratings for protected industrial circuits.
• Compact 8 mm terminal spacing supports space-efficient panel construction.
• Reliable screw clamp connection technology provides secure conductor termination.

Key Features

• TE Connectivity ENTRELEC SNK series.
• 4 mm² screw clamp fuse terminal block.
• Suitable for 5 × 20 mm and 5 × 25 mm cartridge fuses.
• 115–250 V AC/DC blown-fuse indicator.
• Indicator leakage current of less than 0.5 mA.
• Two built-in 2 mm test sockets.
• Single-level, two-position configuration.
• 8 mm product spacing.
• 6.3 A rated current to IEC.
• 630 V rated voltage to IEC.
• 8000 V IEC impulse withstand voltage.
• Grey and dark-grey polyamide housing.
• UL 94 V-0 flammability rating.
• IP20 ingress protection.
• Operating temperature range of -55 to +110 °C.

Integrated Circuit Protection with Fault Indication

Fused terminal blocks combine conductor termination and replaceable overcurrent protection within a single DIN rail component. The ZS4-SF1-R4 adds a 115–250 V AC/DC blown-fuse indicator, allowing maintenance personnel to locate failed fuse circuits quickly and helping reduce troubleshooting time in industrial electrical installations.

Two built-in test sockets further simplify diagnostic work by providing convenient measurement access. Together with the modular ENTRELEC SNK architecture and secure screw clamp connections, these features make the ZS4-SF1-R4 particularly suitable for control panels where circuit protection, serviceability and efficient use of DIN rail space are important.

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.
• Power and signal distribution assemblies.
• Circuits requiring visual blown-fuse indication.