1snk508413r0000 – zs4-sf1-r2 [pk=50] fuse terminal block

Why Choose the TE Connectivity ENTRELEC ZS4-SF1-R2 Fuse Terminal Block?

The TE Connectivity ENTRELEC 1SNK508413R0000 ZS4-SF1-R2 is a professional screw clamp fuse terminal block designed to combine circuit protection, connection and fault indication within a compact DIN rail-mounted format. Part of the ENTRELEC SNK series, it is suitable for industrial control panels, machinery and automation systems where reliable fused circuit distribution is required.

The ZS4-SF1-R2 accommodates 5 × 20 mm and 5 × 25 mm fuses and incorporates a 24–60 V DC blown-fuse indicator for rapid identification of a failed fuse. Integrated 2 mm test socket screws provide convenient access for electrical testing and troubleshooting without compromising the organised terminal block installation.

With an IEC current rating of 6.3 A, an IEC voltage rating of 630 V for the terminal block and conductor capacity up to 4 mm², the ZS4-SF1-R2 provides dependable connectivity for industrial circuits. Its 8 mm spacing, DIN rail mounting and compact 59.7 × 8 × 45.6 mm format make it particularly suitable for space-conscious electrical panel designs.

Key Advantages

• Combines fuse protection and terminal connection within a single DIN rail-mounted device.
• Suitable for 5 × 20 mm and 5 × 25 mm fuses.
• Integrated 24–60 V DC blown-fuse indicator helps identify defective circuits quickly.
• Built-in 2 mm test socket screws simplify electrical testing and diagnostics.
• 6.3 A IEC current rating for industrial control and protection applications.
• Accepts conductors up to 4 mm² using proven screw clamp connection technology.
• Compact 8 mm terminal spacing supports efficient use of DIN rail space.

Key Features

• TE Connectivity ENTRELEC SNK series.
• ZS4-SF1-R2 fuse terminal block.
• Screw clamp connection technology.
• 2 positions and 1 circuit.
• Single-level terminal block construction.
• Supports 5 × 20 mm and 5 × 25 mm fuses.
• 24–60 V DC blown-fuse indication.
• Integrated 2 mm test socket screws.
• TH35-7.5 and TH35-15 DIN rail mounting.
• Grey and dark grey polyamide housing.
• Wide -55 °C to +110 °C operating temperature range.

Integrated Fuse Protection for Industrial Control Circuits

Fuse terminal blocks combine conductor termination and replaceable overcurrent protection in a modular DIN rail format. This allows individual control and auxiliary circuits to be protected while keeping fuse access and wiring together in an organised panel assembly. A failed fuse can be replaced without changing the terminal block or disturbing neighbouring circuit connections.

The ZS4-SF1-R2 adds a 24–60 V DC blown-fuse indicator to make fault identification faster during operation and maintenance. Integrated test sockets further simplify circuit measurement and troubleshooting, making the terminal particularly useful in automation panels and machinery where efficient diagnostics and minimal downtime are important.

Typical Applications

• Industrial control and automation panels.
• PLC input and output circuit protection.
• Machine control systems.
• Power supply and auxiliary circuit distribution.
• Instrumentation and process control panels.
• Switchgear and electrical distribution equipment.
• OEM machinery and electrical panel building.