TE Connectivity / Entrelec PO-DS-VL 1SNA166757R0400 is a blue ESSAILEC open-contact polarity test block socket with screw-clamp connections for base or half-base mounting in electrical testing and measurement systems.
£119.33
The TE Connectivity / Entrelec PO-DS-VL 1SNA166757R0400 is an industrial ESSAILEC test block socket with open contacts designed for polarity circuits in electrical testing, measurement and protection systems. Part of the established ENTRELEC ESSAILEC test block range, it provides a reliable interface for test and measurement connections in switchboards, control panels and electrical installations.
The PO-DS-VL uses a screw-clamp connection system and is intended for base or half-base mounting. Its ESSAILEC configuration enables compatible test plugs and accessories to be connected to the circuit in a controlled and repeatable manner, supporting maintenance, commissioning and electrical testing procedures.
This blue polarity socket features open contacts and is rated for operation at up to 400 V and 8 A. Its industrial construction and modular ESSAILEC format make the PO-DS-VL suitable for electrical installations where dependable access to measurement and test circuits is required.
ESSAILEC test blocks provide a structured interface between electrical circuits and test equipment, helping technicians perform commissioning, measurement and maintenance work without relying on improvised connections. The PO-DS-VL is specifically configured as an open-contact polarity socket and provides secure screw-clamp termination for field conductors.
Its base or half-base mounting arrangement makes it suitable for integration into switchboards and electrical control assemblies. Used with compatible ESSAILEC plugs and accessories, the PO-DS-VL provides a dependable connection point for test procedures in industrial power, protection and measurement installations.
| Manufacturer | TE Connectivity / Entrelec |
|---|---|
| Series | ESSAILEC |
| Model | PO-DS-VL |
| Manufacturer part number | 1SNA166757R0400 |
| Product type | Test block socket |
| Circuit type | Polarity |
| Contact configuration | Open contacts |
| Connection technology | Screw clamp (VL) |
| Mounting type | Base / half-base mounting |
| Colour | Blue |
| Rated voltage | 400 V |
| Rated current | 8 A |
| Impulse withstand voltage | 4 kV |
| Pollution degree | 3 |
| Rigid conductor capacity | 0.2–6 mm² |
| Flexible conductor capacity | 0.22–4 mm² |
| Wire stripping length | 9.5 mm |
| Recommended screwdriver | 4 mm |
| Recommended tightening torque | 0.5–0.8 Nm |
| Working temperature range | -10 to +55 °C |
| Storage temperature range | -25 to +70 °C |
| Front protection with cover | IP40 |
| Front protection without cover | IP20 |
| Pack quantity | 1 |
It is an ENTRELEC ESSAILEC test block socket with open contacts, designed for polarity circuits used in electrical testing, measurement and related applications.
The PO-DS-VL uses screw-clamp (VL) connections for secure termination of electrical conductors.
The socket is rated for up to 400 V with a rated current of 8 A.
The PO-DS-VL is designed for base or half-base mounting within compatible electrical assemblies.
The PO-DS-VL is identified as a polarity-circuit socket with open contacts within the ESSAILEC test block system.
It is typically used in switchboards, protection and metering panels, industrial control systems and other installations requiring reliable access to electrical test and measurement circuits.
TE Connectivity / Entrelec ESSAILEC test blocks are engineered to provide dependable and organised test interfaces for industrial electrical, measurement and protection circuits, supporting efficient commissioning, testing and maintenance.
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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...