TE Connectivity 1SNA166755R0200 TC-D-C5A is an ENTRELEC ESSAILEC voltage test socket with make-before-break contacts, half-base mounting and a C5A quick-connect interface for voltage-transformer secondary test circuits.
£118.36
The TE Connectivity 1SNA166755R0200 is a TC-D-C5A voltage test socket from the ENTRELEC ESSAILEC measuring and testing range. It is designed for test and measurement operations on voltage-transformer secondary circuits and combines a make-before-break contact arrangement with a compact half-base mounting configuration.
The TC-D-C5A uses a C5A quick-connect interface, providing an efficient wiring method for compatible panel installations. Within the ESSAILEC identification system, the model designation identifies a voltage-circuit socket with make-before-break contacts, half-base mounting and quick-connect termination, making the exact configuration straightforward to identify during specification and maintenance.
ESSAILEC test blocks provide a dedicated plug-and-socket interface for current and voltage measurement, monitoring, injection, commissioning and maintenance of secondary circuits associated with transformers, sensors, meters and protection relays. The TC-D-C5A is particularly suited to installations where a semi-flush half-base voltage socket with fast-connect wiring is required.
The ESSAILEC system provides engineers with a dedicated interface for accessing secondary electrical circuits during measurement, monitoring, commissioning, maintenance and equipment replacement. Rather than connecting test equipment directly to permanent panel wiring, compatible plugs and sockets create an organised test point for circuits associated with voltage transformers, meters, instrumentation and protection relays.
The TE Connectivity TC-D-C5A combines the ESSAILEC test architecture with half-base mounting and a C5A quick-connect interface. Its make-before-break contact arrangement provides a defined switching sequence during compatible plug operation, while the ESSAILEC coding and reverse-insertion protection features help support dependable use in switchgear, protection panels, substations and industrial power installations.
| Manufacturer | TE Connectivity / ENTRELEC |
|---|---|
| Series | ESSAILEC |
| Model | TC-D-C5A |
| Part number | 1SNA166755R0200 |
| Legacy reference | 0166755.02 |
| Product type | Voltage test socket |
| Circuit type | Voltage |
| Contact configuration | Make before break |
| Mounting | Half-base / semi-flush mounting |
| Connection technology | C5A quick-connect |
| Quick-connect size | 5 × 0.8 mm |
| Application | Voltage-transformer secondary circuit testing and measurement |
| Front protection | IP20 |
| Pack quantity | 1 |
| EAN | 3472591667554 |
| Customs tariff number | 85369010 |
The 1SNA166755R0200 is a TC-D-C5A ESSAILEC voltage test socket featuring make-before-break contacts, half-base mounting and a C5A quick-connect wiring interface.
Within the ESSAILEC identification system, T denotes a voltage circuit, C identifies make-before-break contacts, D indicates half-base mounting and C5A identifies the quick-connect termination system.
The socket uses a C5A quick-connect interface based on 5 × 0.8 mm connections, providing a convenient wiring method for compatible panel installations.
The TC-D-C5A uses a half-base, semi-flush mounting arrangement, allowing it to be integrated into compatible ESSAILEC panel installations.
The TC-D-C5A is designed for testing and measurement on voltage-transformer secondary circuits, including applications involving meters, instrumentation, monitoring equipment and protection relays.
The EAN for the 1SNA166755R0200 TC-D-C5A is 3472591667554.
TE Connectivity ENTRELEC ESSAILEC products provide dedicated interfaces for transformer secondary circuits, metering and protection systems, helping engineers carry out structured measurement, testing, commissioning and maintenance across switchgear, substations and industrial power installations.
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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...