TE Connectivity ZS4-BL 1SNK505020R0000 is a blue 4 mm²-class screw-clamp feed-through DIN-rail terminal block rated at 32 A and 1000 V IEC for industrial power and signal wiring.
£0.50
The TE Connectivity ZS4-BL 1SNK505020R0000 is a compact blue screw-clamp feed-through terminal block designed for dependable power and signal connections in industrial control panels, switchgear and electrical distribution systems. Part of the ENTRELEC SNK ZS series, it combines proven screw connection technology with a space-saving DIN-rail format.
Designed as a single-level, single-circuit terminal block with two connection positions, the ZS4-BL provides straightforward conductor termination and reliable electrical continuity between incoming and outgoing wiring. Its blue polyamide housing makes it particularly suitable where colour-coded terminal identification is required within organised control-panel assemblies.
The terminal supports conductors up to 4 mm², has an IEC current rating of 32 A and an IEC voltage rating of 1000 V. With a narrow 5.2 mm pitch and mounting compatibility with TH35 DIN rails, it provides a practical solution for high-density industrial wiring applications.
Feed-through terminal blocks provide a secure and organised method of joining conductors inside electrical enclosures. The ZS4-BL uses a conventional screw-clamp connection to create a firm conductor interface while allowing technicians to install, inspect and maintain wiring using standard tools.
Its compact SNK-series construction helps reduce the amount of DIN-rail space required for large terminal assemblies. The blue housing also supports structured colour coding, making circuit identification easier during installation, commissioning and maintenance.
| Manufacturer | TE Connectivity |
|---|---|
| Brand / family | ENTRELEC |
| Series | SNK ZS |
| Model | ZS4-BL |
| Part number | 1SNK505020R0000 |
| Product type | Screw-clamp feed-through terminal block |
| Terminal size | 4 mm² class |
| Connection type | Screw terminal |
| Block function | Feed-through |
| Number of circuits | 1 |
| Number of positions | 2 |
| Number of levels | 1 |
| Colour | Blue |
| IEC rated current | 32 A |
| IEC rated voltage | 1000 V |
| UL / CSA current rating | 20 A |
| UL / CSA voltage rating | 600 V |
| Impulse withstand voltage | 8000 V |
| Short-time withstand current at 1 s | 480 A |
| Flexible conductor capacity | 0.22–4 mm² |
| Rigid stranded conductor capacity | 0.2–4 mm² |
| Insulated ferrule capacity | 0.22–2.5 mm² |
| Wire stripping length | 10.5 mm |
| Product spacing | 5.2 mm |
| Product height | 53 mm |
| Product length | 47.3 mm |
| Product depth | 47.3 mm |
| Housing material | Polyamide |
| DIN rail | TH35-7.5 / TH35-15 |
| Protection rating | IP20 |
| Flammability rating | UL 94V-0 |
| Operating temperature | -55 to 110 °C |
| Weight | 8.8 g |
It is a feed-through DIN-rail terminal block used to connect and distribute power or signal conductors within industrial electrical panels and control systems.
The terminal supports rigid stranded conductors from approximately 0.2–4 mm² and flexible conductors from approximately 0.22–4 mm².
The ZS4-BL has an IEC current rating of 32 A and an IEC voltage rating of 1000 V.
The terminal is designed for mounting on standard TH35-7.5 and TH35-15 DIN rails.
The blue housing enables clear visual identification and colour coding within terminal assemblies, helping technicians organise and trace circuits in electrical panels.
TE Connectivity ENTRELEC SNK terminal blocks are designed for organised, dependable industrial wiring, combining compact DIN-rail installation with proven connection technology for power and signal circuits.
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2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...