zs4-d2-sf1 – double deck fused 4mm term

Why Choose the TE Connectivity ZS4-D2-SF1 Double-Deck Fused Terminal Block?

The TE Connectivity ZS4-D2-SF1 1SNK508425R0000 is a compact double-deck fused screw clamp terminal block designed for industrial control, automation, instrumentation and power distribution applications. Part of the TE Connectivity ENTRELEC SNK Series, it combines feed-through and fuse functions within one space-saving DIN rail terminal block.

The ZS4-D2-SF1 provides two independent circuits across two levels with four connection positions. Its 8 mm pitch allows panel builders to increase wiring density while maintaining clear separation between circuit functions, making it particularly useful in control cabinets where space efficiency and fused protection are important.

Designed around a nominal 4 mm² terminal size, the ZS4-D2-SF1 accepts conductors up to 6 mm² and supports 5 × 20 mm and 5 × 25 mm fuses. The terminal is rated at 6.3 A and 800 V under IEC specifications, providing dependable circuit protection and connectivity for demanding industrial installations.

Key Advantages

• Combines feed-through and fused circuit functions in one terminal block.
• Double-deck construction provides two circuits while conserving DIN rail space.
• Designed for 5 × 20 mm and 5 × 25 mm cartridge fuses.
• Four connection positions support organised field and control wiring.
• Compact 8 mm pitch enables high-density panel layouts.
• 800 V IEC voltage rating for industrial applications.
• Secure screw clamp termination provides reliable conductor retention.

Key Features

• TE Connectivity ENTRELEC SNK Series.
• ZS4-D2-SF1 double-deck fused terminal block.
• Feed-through and fuse block function.
• 2 independent circuits.
• 2 levels.
• 4 connection positions.
• 8 mm product spacing.
• 6.3 A IEC rated current.
• 800 V IEC rated voltage.
• 12 A UL/CSA rated current.
• 300 V UL/CSA operating voltage.
• 8,000 V IEC impulse withstand voltage.
• Suitable for 5 × 20 mm and 5 × 25 mm fuses.
• Grey and dark grey polyamide housing.
• UL 94V-0 flammability rating.

Reliable Double-Deck Fused Connectivity

Double-deck fuse terminal blocks allow panel builders to combine multiple circuit functions within a smaller DIN rail footprint. The TE Connectivity ZS4-D2-SF1 incorporates separate feed-through and fused functions across two levels, helping improve wiring density while retaining straightforward circuit identification and maintenance access.

The integrated fuse holder accepts standard 5 × 20 mm and 5 × 25 mm cartridge fuses, allowing individual circuits to be protected without requiring separate external fuse holders. Together with dependable screw clamp connections and the compact 8 mm width, this makes the ZS4-D2-SF1 well suited to industrial control, instrumentation and I/O wiring.

Typical Applications

• Industrial control panels and automation cabinets.
• Fused control and signal circuits.
• PLC and I/O marshalling systems.
• Instrumentation and measurement circuits.
• Process control installations.
• Machine building and factory automation.
• High-density DIN rail terminal assemblies.