TE Connectivity TF-E-VA 1SNA166745R0000 is an 8 A, 400 V ENTRELEC ESSAILEC eight-pole voltage test socket with closed contacts, ring-tongue termination and flush mounting for voltage-transformer measurement and distribution circuits.
£127.80
The TE Connectivity TF-E-VA 1SNA166745R0000 is an 8-pole voltage test socket with closed contacts from the established ENTRELEC ESSAILEC test block range. Designed for voltage-transformer secondary circuits, it provides a dedicated interface for measurement, distribution, testing and maintenance applications in switchgear, metering panels and electrical protection systems.
The TF-E-VA uses the closed-contact principle, meaning the electrical connection remains continuous and the circuit stays closed during the testing operation. This makes the socket particularly suitable for measurement and distribution applications where continuity of the voltage circuit must be maintained while test equipment is connected.
Rated at 8 A and 400 V, the TF-E-VA features ring-tongue termination for conductors from 0.34–10 mm² and is designed for flush mounting. Its grey coding follows the ESSAILEC convention for voltage circuits, while the compact 50 × 74 × 57 mm construction supports integration into professional electrical panels.
The TF-E-VA uses a closed-contact principle in which the permanent electrical connection remains continuous when test equipment is introduced. This enables measurement and diagnostic work to be performed while maintaining the voltage circuit, making the socket particularly useful in metering, monitoring and distribution installations.
As part of the ESSAILEC system, the TF-E-VA provides a defined plug-and-socket interface for secondary electrical circuits. Its flush-mounted design, ring-tongue terminations and compatible protective accessories support repeatable commissioning, testing and maintenance procedures in utility and industrial power systems.
| Manufacturer | TE Connectivity |
|---|---|
| Brand / range | ENTRELEC |
| Series | ESSAILEC |
| Model | TF-E-VA |
| Manufacturer part number | 1SNA166745R0000 |
| Product type | Voltage test socket / fixed terminal block |
| Application | Voltage-transformer measurement and distribution circuits |
| Number of poles | 8 |
| Contact principle | Closed contacts |
| Rated current | 8 A |
| Rated voltage | 400 V |
| Rated short-time withstand current | 800 A for 1 s |
| Rated impulse withstand voltage | 4000 V |
| Connection type | Ring-tongue |
| Conductor capacity | 0.34–10 mm² |
| Mounting type | Flush mounting |
| Colour | Grey |
| Pollution degree | 3 |
| Working temperature range | -10–55 °C |
| Storage temperature range | -25–70 °C |
| Protection rating | IP20; IP40 with compatible cover |
| Width | 50 mm |
| Height | 74 mm |
| Depth | 57 mm |
| Weight | approx. 170 g |
| Compatible cover | CPT-1 |
| Compatible pre-wired plug | COR-T-4-4 |
| Pack quantity | 1 |
| EAN | 3472591667455 |
The TF-E-VA is an 8-pole ENTRELEC ESSAILEC voltage test socket with closed contacts, designed primarily for voltage-transformer measurement and distribution applications.
The closed-contact principle maintains electrical continuity, so the circuit remains closed during the testing operation. This makes the TF-E-VA suitable for measurement and distribution circuits where continuous connection is required.
The TF-E-VA has a rated current of 8 A, a rated voltage of 400 V and a rated impulse withstand voltage of 4000 V.
The ring-tongue main-circuit connection supports conductors from approximately 0.34–10 mm².
The TF-E-VA is compatible with the CPT-1 protective cover and the COR-T-4-4 pre-wired four-pole plug specified for the ESSAILEC voltage range.
TE Connectivity ENTRELEC ESSAILEC test blocks provide a modular connection platform for electrical measurement, monitoring, commissioning and protection applications where controlled and repeatable access to transformer secondary circuits is required.
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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...