zs4-sf1 – 4mm fused terminal

Why Choose the TE Connectivity ZS4-SF1 1SNK508410R0000 Fused Terminal Block?

The TE Connectivity ZS4-SF1 1SNK508410R0000 is a compact 4 mm² screw clamp fuse terminal block designed to combine conductor termination and circuit protection within industrial control panels, switchgear and automation systems. Part of the TE Connectivity ENTRELEC SNK series, it provides an integrated fuse function within a DIN rail terminal block, helping simplify protected power and signal circuit wiring.

The ZS4-SF1 uses proven screw terminal connection technology and provides two connection positions on a single level. It accepts conductors from 0.2–4 mm² and is designed for 5 × 20 mm and 5 × 25 mm cartridge fuses, providing flexibility when selecting suitable fuse protection for control, signalling, instrumentation and auxiliary circuits.

With an IEC current rating of 6.3 A, an IEC voltage rating of 630 V and an 8 mm terminal spacing, the ZS4-SF1 provides dependable electrical performance in a compact format. Its grey and dark grey polyamide housing, IP20 protection and compatibility with TH35 DIN rails make it a practical choice for professional panel builders, machine manufacturers and automation engineers.

Key Advantages

• Combines terminal connection and fuse protection within a single DIN rail component.
• Accepts both 5 × 20 mm and 5 × 25 mm cartridge fuses.
• 6.3 A IEC rated current and 630 V IEC rated voltage.
• Supports conductors from 0.2–4 mm² for versatile industrial wiring.
• Reliable screw clamp termination provides secure and maintainable conductor connections.
• Compact 8 mm terminal spacing supports organised DIN rail installations.

Key Features

• TE Connectivity ENTRELEC SNK ZS4-SF1 fuse terminal block.
• 4 mm² nominal terminal size.
• Suitable for 5 × 20 mm and 5 × 25 mm fuse links.
• Screw clamp connection technology.
• Single-level configuration.
• Two connection positions.
• 0.2–4 mm² conductor range.
• 6.3 A IEC current rating.
• 630 V IEC voltage rating.
• 8 mm product spacing.
• Grey and dark grey polyamide housing.
• IP20 protection and UL 94V-0 flammability rating.

Integrated Fuse Protection with Flexible Cartridge Fuse Selection

Fuse terminal blocks combine conductor termination with replaceable overcurrent protection in a single DIN rail component. This arrangement can simplify control panel construction by locating circuit protection directly alongside the associated wiring, while also providing convenient access for inspection, testing and fuse replacement during commissioning or maintenance.

The ZS4-SF1 supports both 5 × 20 mm and 5 × 25 mm cartridge fuses, distinguishing it as a versatile fused terminal for industrial power and signal circuits. With a 4 mm² conductor capacity, 6.3 A IEC current rating and 630 V IEC voltage rating, it provides an effective combination of termination, circuit protection and DIN rail integration.

Typical Applications

• Industrial control panels and electrical cabinets.
• Fused power, control and auxiliary circuits.
• PLC input, output and control wiring.
• Instrumentation and measurement systems.
• Machine building and OEM automation equipment.
• Switchgear and protected signal distribution circuits.