TE Connectivity ZS4-S-T2.3-R1 1SNK506312R0000 is a grey 4 mm²-class ENTRELEC SNK screw clamp disconnect switch terminal block with a closed blade and two 2.3 mm test socket screws, rated at 26 A and 400 V IEC and supplied in a pack of 50.
£5.21
The TE Connectivity ZS4-S-T2.3-R1 1SNK506312R0000 is a specialised 4 mm² screw clamp disconnect terminal block designed for circuit isolation, testing and measurement within industrial control and automation systems. Part of the TE Connectivity ENTRELEC SNK Series, it combines secure screw clamp conductor termination with an integrated blade disconnect and test facilities.
The ZS4-S-T2.3-R1 features a closed orange disconnect blade together with two 2.3 mm test socket screws, enabling convenient access for electrical testing while maintaining an organised DIN rail installation. Its single-level, two-position configuration provides one disconnect circuit, making it particularly suitable for instrumentation, measurement, commissioning and maintenance applications.
With an IEC rated current of 26 A and an IEC rated voltage of 400 V, the terminal provides dependable performance for industrial control circuits. Its grey polyamide housing, IP20 protection, UL 94V-0 flammability rating and wide -55 to +110 °C operating temperature range support reliable use in demanding electrical installations.
Disconnect terminal blocks allow technicians to isolate individual circuits without removing field conductors, simplifying commissioning, measurement, troubleshooting and maintenance. The TE Connectivity ZS4-S-T2.3-R1 incorporates a blade disconnect mechanism that provides a clear method of opening the circuit while retaining secure screw-clamped conductor connections.
The integrated 2.3 mm test socket screws provide dedicated access for test equipment, making the terminal particularly useful in instrumentation and control applications where measurements may need to be performed regularly. Combined with its compact 6 mm DIN rail width and robust SNK Series construction, this configuration provides a practical solution for densely populated industrial panels.
| Manufacturer | TE Connectivity / ENTRELEC |
|---|---|
| Series | SNK Series |
| Model | ZS4-S-T2.3-R1 |
| Part number | 1SNK506312R0000 |
| Product type | Screw clamp disconnect terminal block / switch block |
| Block function | Disconnect |
| Disconnect type | Blade |
| Blade configuration | Closed orange blade |
| Test connection | 2 × 2.3 mm test socket screws |
| Connection method | Screw clamp |
| Number of levels | 1 |
| Number of positions | 2 |
| Number of circuits | 1 |
| Gauge type | A3-B3 |
| Single flexible conductor capacity | 0.22–4 mm² |
| Single rigid stranded conductor capacity | 0.2–4 mm² |
| Single flexible conductor range | 24–10 AWG |
| Single insulated ferrule capacity | 0.22–4 mm² |
| Single non-insulated ferrule capacity | 0.22–4 mm² |
| Two flexible conductor capacity | 0.2–1.5 mm² |
| Two rigid stranded conductor capacity | 0.2–1.5 mm² |
| Twin ferrule capacity | 0.22–1.5 mm² |
| IEC rated current | 26 A |
| IEC rated voltage | 400 V |
| UL rated current | 26 A |
| CSA rated voltage | 150 V |
| UL / CSA maximum main-circuit operating voltage | 150 V |
| Short-time withstand current (1 s) | 480 A |
| IEC impulse withstand voltage | 6000 V |
| Maximum dielectric withstand voltage | 1890 V |
| Power loss | 0.8 W |
| Product spacing | 6 mm |
| Wire stripping length | 10.5 mm |
| Tool size | 3.5 mm |
| Mounting type | DIN rail |
| DIN rail compatibility | TH35-7.5 / TH35-15 |
| Housing material | Polyamide |
| Colour | Grey |
| Protection rating | IP20 |
| Flammability rating | UL 94V-0 |
| Dimensions (W × H × D) | 6 × 70.5 × 51.4 mm |
| Product weight | 14.2 g |
| Operating temperature range | -55 to +110 °C |
| Installation temperature range | -5 to +40 °C |
| Pack quantity | 50 |
The ZS4-S-T2.3-R1 is a screw clamp disconnect terminal block designed for connecting, isolating and testing industrial control, signal and instrumentation circuits.
The terminal incorporates two test socket screws designed for 2.3 mm test connections, providing convenient access for measurement and diagnostic equipment.
The terminal has an IEC rated current of 26 A and an IEC rated voltage of 400 V, with a 6000 V impulse withstand rating.
The terminal accepts a single flexible conductor from 0.22–4 mm² or a single rigid stranded conductor from 0.2–4 mm², with additional configurations available for two conductors or ferrules.
The terminal mounts on standard TH35-7.5 or TH35-15 DIN rails, and part number 1SNK506312R0000 is supplied in a pack quantity of 50.
TE Connectivity ENTRELEC SNK Series disconnect terminal blocks provide panel builders, automation engineers and maintenance teams with compact, dependable circuit isolation and accessible testing points for industrial control and instrumentation systems.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
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...