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ZS4-BL – 4mm SCREW TERMINAL BLUE
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.
£0.5303
Why Choose the TE Connectivity ZS4-BL 1SNK505020R0000 Feed-Through Terminal Block?
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.
Key Advantages
- Reliable screw-clamp feed-through connection for industrial wiring.
- Supports conductor sizes up to 4 mm².
- 32 A IEC current rating for power and signal circuits.
- 1000 V IEC voltage rating for demanding electrical installations.
- Compact 5.2 mm terminal spacing helps maximise DIN-rail capacity.
- Blue housing provides clear visual identification within terminal assemblies.
- DIN-rail mounting enables straightforward installation in electrical panels.
Key Features
- TE Connectivity ENTRELEC SNK ZS series.
- Feed-through screw-clamp terminal block.
- Blue polyamide housing.
- Single circuit with 2 connection positions.
- Single-level terminal configuration.
- 0.2–4 mm² rigid stranded conductor capacity.
- 0.22–4 mm² flexible conductor capacity.
- 10.5 mm wire stripping length.
- Compatible with TH35-7.5 and TH35-15 DIN rails.
- IP20 protection rating.
- UL 94V-0 housing flammability rating.
Reliable Screw-Terminal Connectivity for Control Panels
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.
Typical Applications
- Industrial control panels and automation cabinets.
- Electrical distribution and switchgear assemblies.
- Machine building and OEM electrical systems.
- Power and signal circuit termination.
- PLC and instrumentation wiring.
- Motor control centres.
- DIN-rail terminal strips requiring blue circuit identification.
Technical Specifications
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| Number of Connection Points | 24 | |
|---|---|---|
| Connection | Spring clamp | |
| Terminal Type | Feed-through | |
| Conductor Size | 2.5 mm² | |
| Number of Levels | 1 | |
| Product Series | TE SNK | |
| Colour | Blue | |
| 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 |
Frequently Asked Questions
What is the TE Connectivity ZS4-BL 1SNK505020R0000 used for?
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.
What conductor size can the ZS4-BL accept?
The terminal supports rigid stranded conductors from approximately 0.2–4 mm² and flexible conductors from approximately 0.22–4 mm².
What are the IEC electrical ratings?
The ZS4-BL has an IEC current rating of 32 A and an IEC voltage rating of 1000 V.
Which DIN rails are compatible with this terminal block?
The terminal is designed for mounting on standard TH35-7.5 and TH35-15 DIN rails.
Why is the ZS4-BL terminal blue?
The blue housing enables clear visual identification and colour coding within terminal assemblies, helping technicians organise and trace circuits in electrical panels.
Trusted Industrial Terminal Connectivity
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.
