1snk505220r0000 – zs4-d2-bl [pk=50] double deck block

Why Choose the TE Connectivity ZS4-D2-BL 1SNK505220R0000 Double-Deck Terminal Block?

The TE Connectivity ENTRELEC ZS4-D2-BL 1SNK505220R0000 is a blue double-deck feed-through screw clamp terminal block from the SNK Series, designed to provide two independent circuits within a compact DIN rail footprint. With 2 levels, 2 circuits and 4 connection positions, it is an efficient solution for high-density control, automation and industrial wiring applications.

The ZS4-D2-BL uses proven screw clamp termination and accepts flexible conductors from 0.22–4 mm² and rigid stranded conductors from 0.2–4 mm². Its narrow 5.2 mm pitch helps maximise available DIN rail space while providing an IEC current rating of 29 A and voltage rating of 800 V.

Manufactured with a durable blue polyamide housing, the terminal block mounts onto standard TH35-7.5 or TH35-15 DIN rail. It provides IP20 protection, a UL 94V-0 flammability rating and an operating temperature range of -55 to +110 °C. The 1SNK505220R0000 is supplied in a pack of 50 terminal blocks.

Key Advantages

• Double-deck design provides two independent circuits in a compact footprint.
• 4 connection positions across two terminal levels.
• 29 A IEC current rating and 800 V IEC voltage rating.
• Compact 5.2 mm pitch helps maximise DIN rail connection density.
• Accepts flexible and rigid stranded conductors up to 4 mm².
• Reliable screw clamp termination for secure conductor connections.
• Compatible with TH35-7.5 and TH35-15 DIN rails.
• IP20 protection and UL 94V-0 flame-retardant housing.

Key Features

• TE Connectivity ENTRELEC SNK Series terminal block.
• ZS4-D2-BL blue double-deck configuration.
• 2 circuits across 2 levels.
• 4 connection positions.
• 5.2 mm product spacing.
• 480 A short-time withstand current for 1 second.
• 8 kV IEC impulse withstand voltage.
• Durable blue polyamide housing.
• 10 mm conductor stripping length.
• 3.5 mm tool size.

Space-Efficient Double-Deck Terminal Connections

Double-deck terminal blocks provide two independent conductor paths within a narrow DIN rail footprint, helping panel builders increase connection density without significantly increasing enclosure size. Separating the circuits across two levels also helps maintain an organised wiring layout while keeping individual termination points accessible for installation, testing and maintenance.

The ENTRELEC ZS4-D2-BL combines two feed-through circuits with a compact 5.2 mm pitch and screw clamp termination. This makes it particularly suitable for control cabinets, automation systems and machinery where multiple circuits must be accommodated efficiently while retaining secure and serviceable conductor connections.

Typical Applications

• High-density industrial control panels.
• PLC and automation cabinets.
• Instrumentation and process control systems.
• Machine building and OEM electrical equipment.
• Power and signal circuit distribution.
• Switchgear and distribution assemblies.
• Double-level DIN rail wiring systems.
• Industrial machinery and production equipment.