TE Connectivity ZS10-ST 1SNK508310R0000 is a grey 10 mm² ENTRELEC SNK screw clamp test disconnect terminal block with sliding link isolation, 8 mm spacing and 50 A IEC current rating for industrial measurement circuits.
£4.69
The TE Connectivity ZS10-ST 1SNK508310R0000 is a grey 10 mm² screw clamp test disconnect terminal block designed for safe measurement, testing and isolation of electrical circuits in industrial control panels, protection systems and instrumentation applications. Part of the TE Connectivity ENTRELEC SNK Series, it combines secure screw clamp connections with a sliding link disconnect mechanism for convenient circuit operation and maintenance.
The ZS10-ST is specifically designed for current transformer (CT) and potential transformer (PT) secondary circuits, providing a reliable method for circuit interruption and measurement. Its sliding link can be operated with a screwdriver, while compatible test accessories allow straightforward connection of measurement equipment during commissioning and servicing.
With a 10 mm² rated cross-section, 50 A IEC current rating and 630 V IEC voltage rating, the ZS10-ST provides dependable performance for demanding industrial electrical installations. Its compact 8 mm pitch, grey polyamide housing and DIN rail mounting make it suitable for organised control cabinet assemblies.
Test disconnect terminal blocks provide a controlled method of isolating and measuring electrical circuits without removing field wiring. The TE Connectivity ZS10-ST uses a robust sliding link mechanism to simplify circuit interruption during testing, commissioning and maintenance activities.
Designed for CT and PT secondary circuits, the ZS10-ST supports safe current measurement and troubleshooting procedures while maintaining the compact footprint expected from the ENTRELEC SNK terminal block family. Its dual central accessory channels allow flexible configuration with compatible jumpers and test accessories.
| Manufacturer | TE Connectivity |
|---|---|
| Series | ENTRELEC SNK |
| Model | ZS10-ST |
| Part number | 1SNK508310R0000 |
| Product type | Screw clamp terminal block |
| Block function | Disconnect |
| Disconnect type | Sliding link |
| Application | Power and signal / CT and PT circuits |
| Number of circuits | 1 |
| Number of positions | 2 |
| Number of levels | 1 |
| Colour | Grey |
| Rated cross-section | 10 mm² |
| Product spacing | 8 mm |
| Rated current (IEC) | 50 A |
| Rated voltage (IEC) | 630 V |
| Rated current (UL/CSA) | 53 A |
| Rated voltage (UL/CSA) | 300 V |
| Impulse withstand voltage (IEC) | 8,000 V |
| Dielectric withstand voltage | 2,000 V |
| Short-time withstand current at 1 s | 1,200 A |
| Flexible conductor capacity | 0.5–10 mm² |
| Rigid stranded conductor capacity | 0.5–10 mm² |
| Twin ferrule capacity | 0.5–4 mm² |
| Wire size | 6 AWG |
| Wire stripping length | 13 mm |
| Tool size | 3.5 mm |
| Housing material | Polyamide |
| Flammability rating | UL 94V-0 |
| Protection rating | IP20 |
| Mounting type | DIN rail |
| DIN rail compatibility | TH35-7.5 / TH35-15 |
| Dimensions (H × W × D) | 80.7 × 8 × 52 mm |
| Product weight | 24.8 g |
| Installation temperature range | -5 to +40 °C |
| Operating temperature range | -55 to +110 °C |
The ZS10-ST is a test disconnect terminal block designed for safe isolation, measurement and testing of CT and PT secondary circuits in industrial electrical systems.
The terminal block uses a sliding link disconnect mechanism operated with a screwdriver for convenient circuit isolation and testing.
The terminal block supports conductors from 0.5–10 mm², making it suitable for industrial power and measurement wiring applications.
The ZS10-ST has an IEC rating of 50 A and 630 V, with UL/CSA ratings of 53 A and 300 V.
The terminal block is designed for standard TH35-7.5 and TH35-15 DIN rails.
TE Connectivity ENTRELEC SNK terminal blocks provide dependable solutions for industrial connectivity, measurement and protection circuits, combining secure screw clamp technology with efficient testing and disconnect functionality.
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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...