TE Connectivity FIT-2/4-2 1SNA166937R1100 is a 2 x 4-pole ESSAILEC voltage test plug supplied with eight locking pins and two COP-F-1 coding pins for professional secondary-circuit measurement, commissioning and maintenance.
£51.76
The TE Connectivity FIT-2/4-2 1SNA166937R1100 is a professional 2 × 4-pole ESSAILEC voltage test plug designed for testing, measurement and maintenance of secondary voltage circuits. Part of the established TE Connectivity ENTRELEC ESSAILEC range, it provides a convenient plug-in interface between compatible ESSAILEC sockets and external test equipment.
The FIT-2/4-2 configuration provides a 2 × 4-pole interface, allowing testing across up to four voltage circuits within the ESSAILEC system. The plug is supplied with 8 locking pins and 2 COP-F-1 coding pins, while the required BRE contact pins are selected and ordered separately to suit the test-lead wiring configuration.
With compact dimensions of 44 × 63 × 122 mm and a net weight of approximately 105 g, the 1SNA166937R1100 provides a robust test interface for switchboards, protection panels, substations and metering installations. The associated ESSAILEC voltage range is rated at 400 V, supporting professional measurement and maintenance procedures in industrial secondary circuits.
The ESSAILEC measuring and testing system is designed to simplify operations including voltage measurement, monitoring, calibration and the servicing or replacement of meters and protection relays installed in secondary transformer and sensor circuits. The FIT-2/4-2 provides the removable test interface, connecting compatible fixed sockets to the engineer's test equipment when measurements or maintenance are required.
Its 2 × 4-pole architecture allows several circuits to be accessed through one compact plug, while locking and coding features support controlled connection to the appropriate ESSAILEC socket. This arrangement makes the 1SNA166937R1100 particularly useful in installations requiring regular commissioning and diagnostic access without repeatedly altering permanent field wiring.
| Manufacturer | TE Connectivity |
|---|---|
| Product family | ENTRELEC ESSAILEC |
| Model | FIT-2/4-2 |
| Part number | 1SNA166937R1100 |
| Product type | Voltage test plug |
| Plug configuration | 2 × 4 poles |
| Number of locking pins | 8 |
| Coding pins | 2 × COP-F-1 |
| Contact pins | BRE series, ordered separately |
| Associated voltage-range rating | 400 V |
| Product width | 44 mm |
| Product height | 63 mm |
| Product depth | 122 mm |
| Product net weight | approx. 105 g |
| Compatible system | ESSAILEC measuring and testing blocks |
| Pack quantity | 1 |
| EAN | 3472591669374 |
The 1SNA166937R1100 is a 2 × 4-pole ESSAILEC voltage test plug designed to connect compatible ESSAILEC secondary-circuit sockets to external measurement and test equipment.
The ESSAILEC 2 × 4-pole plug format supports testing of up to four voltage circuits, depending on the compatible socket and wiring configuration.
Yes. The FIT-2/4-2 is supplied with 8 locking pins and 2 COP-F-1 coding pins, supporting secure engagement and correct matching with compatible ESSAILEC sockets.
No. The required BRE contact pins are ordered separately, allowing the plug contacts to be selected to suit the conductor and test-lead requirements of the application.
The TE Connectivity FIT-2/4-2 measures approximately 44 mm wide, 63 mm high and 122 mm deep, with a net weight of approximately 105 g.
TE Connectivity ENTRELEC ESSAILEC components provide a proven modular interface for secondary electrical circuit testing, helping engineers carry out measurement, commissioning and protection-system maintenance efficiently while reducing unnecessary disturbance to permanent panel wiring.
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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...