TE Connectivity 1SNA166546R2100 FIT-1/4-D is a 4-pole 400 V ENTRELEC ESSAILEC voltage test plug with 01-02-03-04 insertion for testing, monitoring and commissioning electrical measurement and protection circuits.
£30.20
The TE Connectivity 1SNA166546R2100 is a specialised 4-pole voltage test plug designed for safe and convenient access to electrical measurement and protection circuits. Also identified as the FIT-1/4-D, this component forms part of the established ENTRELEC ESSAILEC test block system, providing a removable interface for testing, monitoring, commissioning and maintenance operations.
The FIT-1/4-D features a 4-pole configuration with insertion positions 01-02-03-04. It is supplied with a coding pin and locking pins, helping ensure controlled connection to compatible ESSAILEC sockets. Contact pins from the compatible BRE-T range are selected separately, allowing the plug to be configured for the required conductor connection.
Rated for applications up to 400 V, the 1SNA166546R2100 is designed to work with compatible ESSAILEC socket families including TC-E-VA, TC, TO and TF types. This modular approach provides technicians with a practical plug-and-play test interface while helping minimise unnecessary disturbance of permanent field wiring.
Voltage test plugs provide technicians with a controlled interface between permanently installed electrical circuits and test or measurement equipment. In protection and metering systems, this arrangement can simplify voltage measurement, signal monitoring, injection testing and maintenance while reducing the need to disconnect or modify permanent panel wiring.
The FIT-1/4-D forms part of the modular ESSAILEC system, where compatible plugs and sockets can be combined to provide structured test access to secondary circuits associated with voltage transformers, sensors, meters and protection relays. Its four-pole arrangement makes it suitable for simultaneous access to multiple circuit connections through a compact removable interface.
| Manufacturer | TE Connectivity / ENTRELEC |
|---|---|
| Series | ESSAILEC |
| Model | FIT-1/4-D |
| Manufacturer part number | 1SNA166546R2100 |
| Product type | Voltage test plug |
| Number of poles | 4 |
| Insertion configuration | 01-02-03-04 |
| Rated voltage | 400 V |
| Coding | 1 coding pin |
| Locking | 4 locking pins |
| Contact pins | Compatible BRE-T contact pins ordered separately |
| Compatible socket families | TC-E-VA, TC, TO and TF |
| Application | Voltage measurement, testing, monitoring and commissioning |
| EAN | 3472591665468 |
| Pack quantity | 1 |
The 1SNA166546R2100 FIT-1/4-D is a 4-pole voltage test plug used to provide removable access to electrical measurement and protection circuits for testing, monitoring, commissioning and maintenance.
The FIT-1/4-D has a 4-pole configuration with insertion positions identified as 01-02-03-04.
The TE Connectivity FIT-1/4-D is rated for applications up to 400 V.
The FIT-1/4-D is designed for use with compatible BRE-T contact pins, which are selected and ordered separately according to the required conductor connection.
The FIT-1/4-D is designed for use with compatible TC-E-VA, TC, TO and TF ESSAILEC socket configurations, subject to the required circuit and socket arrangement.
TE Connectivity ENTRELEC ESSAILEC test components provide structured and dependable access to electrical measurement and protection circuits, helping engineers carry out testing, commissioning and maintenance through a modular plug-and-socket interface.
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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...