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1snk505312r0000 – zs4-s-t2.3 [pk=50] switch block
TE Connectivity ENTRELEC ZS4-S-T2.3 1SNK505312R0000 is a grey 4 mm² screw clamp disconnect terminal block with a blade disconnect, two built-in 2.3 mm test sockets, 5.2 mm pitch and 25 A 400 V IEC rating for industrial control and testing circuits.
£2.26
Why Choose the TE Connectivity ENTRELEC ZS4-S-T2.3 1SNK505312R0000 Switch Terminal Block?
The TE Connectivity ENTRELEC ZS4-S-T2.3 1SNK505312R0000 is a compact 4 mm² disconnect screw clamp terminal block designed for circuit isolation, testing and switching functions within industrial control panels and electrical distribution systems. Part of the established ENTRELEC SNK Series, it combines two screw clamp connection positions with a blade disconnect mechanism and two built-in 2.3 mm test sockets.
The ZS4-S-T2.3 allows an electrical circuit to be disconnected without removing its permanently terminated conductors, helping simplify commissioning, measurement, maintenance and fault-finding procedures. The two integrated test sockets provide convenient access for electrical testing, while the 5.2 mm pitch enables compact installation alongside compatible SNK Series terminal blocks.
Rated at 25 A and 400 V IEC, the 1SNK505312R0000 supports rigid and flexible conductors up to 4 mm². Its grey polyamide housing is rated UL 94V-0, while an operating temperature range of -55 to 110 °C and IP20 protection make it suitable for professional industrial electrical installations.
Key Advantages
- Integrated blade disconnect function enables convenient circuit isolation.
- Two built-in 2.3 mm test sockets simplify electrical testing and measurement.
- Supports conductor cross-sections up to 4 mm².
- Compact 5.2 mm pitch helps maximise available DIN rail space.
- Reliable screw clamp connections for industrial wiring.
- Rated at 25 A and 400 V IEC.
- Wide -55 to 110 °C operating temperature range.
- IP20 protection and UL 94V-0 flammability rating.
Key Features
- TE Connectivity ENTRELEC ZS4-S-T2.3 disconnect terminal block.
- Screw clamp conductor termination.
- Blade-type disconnect mechanism.
- 2 × 2.3 mm built-in test sockets.
- 2 positions, 1 circuit and 1 level.
- Compact 5.2 mm product spacing.
- Grey polyamide housing.
- 25 A IEC current rating.
- 400 V IEC voltage rating.
- 25 A UL current rating.
- 150 V UL/CSA maximum main-circuit operating voltage.
- DIN rail mounting on TH35-7.5 and TH35-15 rails.
- 10.5 mm conductor stripping length.
Reliable Disconnect and Test Connections for Industrial Control Panels
Disconnect terminal blocks provide an efficient method of isolating individual electrical circuits while retaining permanent conductor connections on either side of the terminal. The TE Connectivity ENTRELEC ZS4-S-T2.3 incorporates a blade disconnect mechanism that can be operated for circuit isolation during commissioning, inspection, troubleshooting and maintenance.
Unlike a standard disconnect terminal, the ZS4-S-T2.3 also incorporates two 2.3 mm test sockets to facilitate measurement and test operations. Combined with its compact 5.2 mm pitch, conductor capacity up to 4 mm² and 25 A / 400 V IEC ratings, this makes the 1SNK505312R0000 particularly suitable for industrial control, instrumentation and testing circuits.
Typical Applications
- Industrial electrical control panels.
- Control circuit isolation and switching.
- Electrical testing and measurement circuits.
- Commissioning and fault-finding applications.
- Machine building and OEM equipment.
- Automation and process control cabinets.
- Instrumentation and monitoring circuits.
- DIN rail terminal assemblies.
Technical Specifications
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| Number of Connection Points | 2 | |
|---|---|---|
| Connection | Spring clamp | |
| Terminal Type | Disconnect / Test | |
| Number of Levels | 1 | |
| Product Series | TE SNK | |
| Colour | Grey | |
| Manufacturer | TE Connectivity / ENTRELEC | |
| Series | ENTRELEC SNK / ZS | |
| Model | ZS4-S-T2.3 | |
| Manufacturer part number | 1SNK505312R0000 | |
| Product type | Screw clamp disconnect terminal block | |
| Block function | Disconnect | |
| Disconnect type | Blade | |
| Connection type | Screw clamp | |
| Test connections | 2 built-in test sockets | |
| Test socket diameter | 2.3 mm | |
| Conductor cross-section | Up to 4 mm² | |
| Colour | Grey | |
| Number of positions | 2 | |
| Number of circuits | 1 | |
| Number of levels | 1 | |
| Gauge type | A3-B3 | |
| Product spacing / pitch | 5.2 mm | |
| IEC current rating | 25 A | |
| IEC voltage rating | 400 V | |
| UL current rating | 25 A | |
| CSA voltage rating | 150 V | |
| UL / CSA maximum main-circuit operating voltage | 150 V | |
| IEC impulse withstand voltage | 6000 V | |
| Dielectric withstand voltage | 1890 V | |
| Short-time withstand current at 1 s | 480 A | |
| Power loss | 0.8 W | |
| 1 flexible conductor per screw clamp | 0.22 to 4 mm² / 24 to 10 AWG | |
| 1 rigid stranded conductor per screw clamp | 0.2 to 4 mm² / 24 to 10 AWG | |
| 1 insulated ferrule per screw clamp | 0.22 to 2.5 mm² / 24 to 14 AWG | |
| 1 non-insulated ferrule per screw clamp | 0.22 to 4 mm² / 24 to 10 AWG | |
| 2 flexible conductors per screw clamp | 0.2 to 1.5 mm² / 24 to 16 AWG | |
| 2 rigid stranded conductors per screw clamp | 0.2 to 1.5 mm² / 24 to 16 AWG | |
| Twin ferrule capacity | 0.22 to 1.5 mm² / 24 to 16 AWG | |
| Wire stripping length | 10.5 mm | |
| Tool size | 3.5 mm | |
| Mounting | DIN rail | |
| DIN rail types | TH35-7.5 / TH35-15 | |
| Housing material | Polyamide | |
| Operating temperature | -55 to 110 °C | |
| Storage temperature | -55 to 110 °C | |
| Installation temperature | -5 to 40 °C | |
| Ingress protection | IP20 | |
| UL flammability rating | UL 94V-0 | |
| Height | 53 mm | |
| Length | 51.35 mm | |
| Depth | 51.4 mm | |
| Width / spacing | 5.2 mm | |
| Product weight | 8.8 g | |
| Pack quantity | 50 | |
| EAN | 3472595053124 |
Frequently Asked Questions
What is the TE Connectivity ENTRELEC ZS4-S-T2.3 1SNK505312R0000 used for?
It is a screw clamp disconnect terminal block designed for connecting, isolating and testing electrical circuits in DIN rail-mounted control panels, machinery, automation systems and instrumentation applications.
What is special about the ZS4-S-T2.3 version?
The ZS4-S-T2.3 combines a blade disconnect mechanism with two built-in 2.3 mm test sockets, allowing convenient circuit isolation and access for electrical test and measurement operations.
What are the electrical ratings of the 1SNK505312R0000?
The terminal is rated at 25 A and 400 V according to IEC specifications. It also has a 25 A UL current rating and a maximum main-circuit operating voltage of 150 V under UL/CSA specifications.
What conductor sizes can the ZS4-S-T2.3 accept?
The screw clamps support single flexible conductors from 0.22 to 4 mm² and single rigid stranded conductors from 0.2 to 4 mm², with additional conductor ranges available for ferrule and multiple-conductor configurations.
How is the ZS4-S-T2.3 mounted and what is its operating temperature range?
The terminal is designed for TH35-7.5 and TH35-15 DIN rails and has an operating temperature range of -55 to 110 °C, with IP20 protection and a UL 94V-0 flammability rating.
Trusted Disconnect and Test Terminals for Industrial Electrical Systems
TE Connectivity ENTRELEC SNK disconnect terminal blocks provide panel builders, automation engineers and maintenance teams with compact, dependable circuit connection, isolation and testing solutions for professional industrial electrical installations.
