1sna166964r0000 – tc-th35-vl

Why Choose the TE Connectivity 1SNA166964R0000 TC-TH35-VL ESSAILEC Voltage Socket?

The TE Connectivity 1SNA166964R0000, also identified as TC-TH35-VL, is a specialised ESSAILEC voltage test socket with short-circuited contacts designed for measurement, calibration and electrical distribution applications. Part of the TE Connectivity / Entrelec ESSAILEC range, it provides a dedicated test interface for voltage circuits within switchgear, metering, protection and industrial electrical systems.

The TC-TH35-VL uses a make-before-break contact principle. During operation, the circuit is automatically shorted when a compatible plug is inserted and closes automatically when the plug is removed. This controlled switching arrangement supports safe and efficient access to measurement circuits during testing, commissioning and maintenance procedures.

Designed specifically for TH35 DIN rail mounting, the socket uses screw-clamp connections and has compact dimensions of approximately 44 mm wide, 80 mm high and 49 mm deep. The grey housing identifies it as part of the ESSAILEC voltage range, while compatibility with several ESSAILEC covers and test plugs provides flexibility when configuring a complete test system.

Key Advantages

• Specialised ESSAILEC voltage socket for measurement and test circuits.
• Short-circuited contacts with a make-before-break operating principle.
• Designed specifically for convenient TH35 DIN rail mounting.
• Screw-clamp termination provides secure industrial wiring connections.
• Compatible with multiple ESSAILEC covers and test plug options.
• Compact 44 mm width supports space-efficient panel installation.
• Grey coding provides clear identification for voltage circuit applications.

Key Features

• TE Connectivity / Entrelec ESSAILEC voltage range.
• TC-TH35-VL manufacturer product designation.
• Short-circuited contact configuration.
• Make-before-break operating principle.
• TH35 rail mounting.
• Screw-clamp connection technology.
• Grey housing for voltage circuit identification.
• Compatible with the CPT-1 and CPT-5 covers.
• Compatible with the FI-2/4-DIA4 universal plug.

Make-Before-Break Voltage Circuit Testing

The ESSAILEC voltage range is designed to provide controlled access to electrical measurement and protection circuits during calibration, testing and maintenance. The TC-TH35-VL incorporates short-circuited contacts operating according to the make-before-break principle, allowing the circuit state to be controlled automatically as a compatible test plug is inserted or removed.

Its TH35 rail mounting format makes the TC-TH35-VL particularly suitable for integration into electrical panels where conventional DIN rail installation is preferred. Combined with screw-clamp wiring, compatible covers and ESSAILEC test plugs, it provides a modular solution for building accessible voltage measurement and testing circuits.

Typical Applications

• Voltage measurement and calibration circuits.
• Instrument transformer secondary circuits.
• Electrical metering and monitoring systems.
• Protection relay testing and commissioning.
• Switchgear and electrical distribution panels.
• Substation protection and control equipment.