TE Connectivity TO-E-VA 1SNA166743R0600 is an 8 A, 400 V flush-mounted ESSAILEC voltage test socket with open contacts and ring-tongue connections for industrial metering, measurement and protection circuits.
£130.77
The TE Connectivity TO-E-VA 1SNA166743R0600 is a professional ESSAILEC voltage test socket designed to provide reliable test access to voltage measurement, metering and protection circuits. Part of the established TE Connectivity ENTRELEC ESSAILEC series, this socket is designed for industrial electrical systems where safe, repeatable testing and straightforward maintenance are essential.
The TO-E-VA uses an open-contact configuration and is designed for flush mounting in electrical panels. Its ring-tongue connection system accommodates conductors from 0.34–10 mm², while silver-plated conductive parts provide dependable electrical performance. The socket works with compatible ESSAILEC plugs to simplify commissioning, measurement and maintenance without repeatedly disturbing permanent panel wiring.
With a rated current of 8 A and rated voltage of 400 V, the 1SNA166743R0600 is well suited to voltage-transformer and secondary measurement circuits. Its compact 74 × 50 × 57 mm construction, grey polycarbonate body and dedicated test-system architecture make it a practical solution for switchboards, protection panels and industrial metering installations.
ESSAILEC test blocks provide a modular method of accessing secondary measurement circuits during commissioning, diagnostics and maintenance. The TO-E-VA forms the fixed socket interface and allows compatible test plugs to be connected when technicians need to measure signals, verify instrumentation or work on protection and metering equipment.
The flush-mounted configuration provides convenient access from the front of an electrical panel, while permanent wiring is securely terminated using ring-tongue connections. This arrangement is particularly valuable in installations requiring regular testing because it reduces repeated disconnection and reconnection of field conductors.
| Manufacturer | TE Connectivity |
|---|---|
| Product family | ENTRELEC ESSAILEC |
| Model | TO-E-VA |
| Part number | 1SNA166743R0600 |
| Product type | Voltage test socket |
| Contact configuration | Open contacts |
| Rated current | 8 A |
| Rated voltage | 400 V |
| Connection type | Ring tongue |
| Connecting capacity | 0.34–10 mm² |
| Lug hole diameter | 3 mm |
| Maximum lug width | 7.5 mm |
| Body material | Polycarbonate |
| Conductive parts | Silver plated |
| Colour | Grey |
| Mounting type | Flush mounting |
| Product height | 74 mm |
| Product width | 50 mm |
| Product depth | 57 mm |
| Product net weight | 170 g |
| Compatible system | ESSAILEC measuring and testing blocks |
| EAN | 3472591667431 |
The 1SNA166743R0600 is an ESSAILEC voltage test socket designed to provide test access to voltage measurement, metering and protection circuits in industrial electrical systems.
The TO-E-VA has a rated current of 8 A and a rated voltage of 400 V.
The TO-E-VA is an open-contact voltage socket, designed as part of the ESSAILEC modular measuring and testing system.
Its ring-tongue connection arrangement supports conductor sizes from 0.34–10 mm², with a 3 mm lug-hole diameter and maximum lug width of 7.5 mm.
The TO-E-VA is designed for flush mounting, providing an accessible test interface on the front of switchboards, protection panels and electrical metering cabinets.
TE Connectivity ENTRELEC ESSAILEC components provide a proven modular interface for electrical measurement and testing, helping engineers perform commissioning, diagnostics and maintenance efficiently across industrial metering, protection and power-distribution systems.
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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...