TE Connectivity 1SNA166566R2500 M10-R-C5A is a grey 400 V 8 A ESSAILEC multicircuit test socket with C5A quick-connect terminals and rack/back-panel mounting for compatible electrical measuring and testing systems.
£54.46
The TE Connectivity 1SNA166566R2500 is an M10-R-C5A multicircuit test socket from the ENTRELEC ESSAILEC measuring and testing range. Designed for rack or back-panel mounting, this grey socket provides a structured connection interface for current measurement and testing circuits used in industrial power distribution, protection and metering systems.
The M10-R-C5A uses a quick-connect C5A interface and provides a multicircuit arrangement for connection with the compatible FIM10-R test plug. The ESSAILEC architecture is designed to simplify testing, measurement, monitoring and maintenance of secondary circuits associated with current transformers, meters and protection relays.
Rated at 400 V and 8 A, the M10-R-C5A has an impulse withstand voltage of 4 kV and is designed for demanding industrial test installations. The socket is supplied with the accessories required for its mounting arrangement, including two COP-E-1 coding pins, helping ensure correct plug/socket configuration.
ESSAILEC test systems provide dedicated connection interfaces for secondary circuits associated with current transformers, meters and protection equipment. Using a matched socket and test plug allows engineers to perform measurement, monitoring, commissioning and maintenance operations through an organised test interface rather than relying on temporary wiring arrangements.
The TE Connectivity M10-R-C5A is specifically configured for rack or back-panel installation and mates with the FIM10-R test plug. Its 400 V, 8 A electrical ratings, C5A quick-connect interface and dedicated coding arrangement make it suitable for professional multicircuit testing installations in switchgear, protection panels, substations and industrial electrical systems.
| Manufacturer | TE Connectivity / ENTRELEC |
|---|---|
| Series | ESSAILEC |
| Model | M10-R-C5A |
| Part number | 1SNA166566R2500 |
| Product type | Multicircuit test socket |
| Application | Current measuring and testing circuits |
| Mounting configuration | Rack / back-panel mounting |
| Connection system | Quick-connect C5A |
| Quick-connect size | 5 × 0.8 mm |
| Rated voltage | 400 V |
| Rated current | 8 A |
| Impulse withstand voltage | 4 kV |
| Short-circuit current | 25 A for 5 s |
| Short-duration current | 800 A for 25 ms |
| Pollution degree | 3 |
| Front-panel protection | IP20 |
| Working temperature range | -10 to +55 °C |
| Storage temperature range | -25 to +70 °C |
| Colour | Grey |
| Compatible plug | FIM10-R, 1SNA166573R2400 |
| Supplied coding pins | 2 × COP-E-1 |
| Product net weight | 60 g |
| Pack quantity | 10 |
| EAN | 3472591665666 |
The 1SNA166566R2500 is an M10-R-C5A multicircuit test socket from the ENTRELEC ESSAILEC range, designed for rack/back-panel mounting in electrical measuring and testing systems.
The M10-R-C5A is designed for use with the FIM10-R test plug, TE Connectivity part number 1SNA166573R2400.
The M10-R-C5A has a rated voltage of 400 V, a rated current of 8 A and an impulse withstand voltage of 4 kV.
The R version is specifically designed for rack or back-panel mounting within compatible ESSAILEC test assemblies.
Yes. The accessories required for the mounting arrangement are supplied with the socket, together with two COP-E-1 coding pins for configuring the compatible ESSAILEC interface.
TE Connectivity ENTRELEC ESSAILEC test systems provide dedicated interfaces for metering, current transformer and protection circuits, helping electrical engineers carry out structured testing, commissioning and maintenance operations in industrial power distribution and control 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...