TE Connectivity FIT-2/4-3 1SNA166553R2000 is an ENTRELEC ESSAILEC 2 x 4-pole voltage test plug with BRE-T-2.5 connections and a red monoblock cover for electrical measurement, protection and metering circuits.
£58.79
The TE Connectivity FIT-2/4-3 1SNA166553R2000 is an industrial ESSAILEC voltage test plug with 2 × 4 poles, designed to provide convenient access to voltage measurement and protection circuits during commissioning, testing and maintenance. Part of the established TE Connectivity ENTRELEC ESSAILEC measuring and testing system, it enables engineers to connect test equipment without repeatedly disturbing permanent field wiring.
The FIT-2/4-3 incorporates BRE-T-2.5 connections and a distinctive red monoblock cover. Its eight-pole arrangement supports simultaneous access to multiple voltage circuits, making it particularly useful in protection, metering and instrumentation installations where efficient and repeatable testing is required.
With compact dimensions of approximately 63 mm high × 44 mm wide × 115 mm deep and a net weight of approximately 108 g, this ESSAILEC test plug is well suited to switchgear, electrical substations, relay panels and industrial control assemblies.
ESSAILEC measuring and testing blocks are designed to simplify operations such as voltage measurement, monitoring, signal injection and maintenance within secondary circuits associated with transformers, sensors, meters and protection relays. Matching plugs and sockets provide controlled test access while helping minimise alterations to permanent wiring.
The FIT-2/4-3 provides eight connection points in a 2 × 4-pole arrangement, allowing multiple circuits to be accessed through a single plug. This makes it particularly suitable for organised and repeatable testing in substations, switchgear and protection systems.
| Manufacturer | TE Connectivity / ENTRELEC |
|---|---|
| Series | ESSAILEC |
| Model | FIT-2/4-3 |
| Manufacturer part number | 1SNA166553R2000 |
| Product type | Voltage test plug |
| Number of poles | 2 × 4 poles |
| Total test connections | 8 |
| Connection | BRE-T-2.5 |
| Cover | Red monoblock cover |
| Height | 63 mm |
| Width | 44 mm |
| Depth | 115 mm |
| Net weight | approx. 108 g |
| Customs tariff number | 85369010 |
| EAN | 3472591665536 |
| Pack quantity | 1 |
The 1SNA166553R2000 is an ESSAILEC voltage test plug used to provide convenient access to voltage measurement, metering and protection circuits during testing and maintenance.
The manufacturer model designation is FIT-2/4-3.
The FIT-2/4-3 has a 2 × 4-pole configuration, providing a total of eight test connections.
The voltage test plug is equipped with BRE-T-2.5 connections.
It is typically used in switchgear, substations, protection relay panels, metering equipment and industrial electrical systems incorporating ESSAILEC measuring and testing blocks.
TE Connectivity’s ENTRELEC ESSAILEC system provides dependable plug-and-play test connectivity for protection, metering and instrumentation circuits, helping engineers carry out commissioning, measurement and maintenance efficiently while minimising disturbance to permanent 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...