1sna115831r0400 – d6/8.st1.rs test circuit+2 socket screw

Why Choose the TE Connectivity 1SNA115831R0400 D6/8.ST1.RS Test Disconnect Terminal Block?

The TE Connectivity 1SNA115831R0400, also identified as D6/8.ST1.RS.IP20, is a specialised 6 mm² sliding-link test disconnect safety terminal block designed primarily for current-transformer (CT), energy and measurement circuits. Part of the established TE Connectivity / Entrelec SNA series, it combines spring-loaded safety screw clamps, a screwdriver-operated sliding link and two integrated test sockets in a compact DIN-rail format.

The D6/8.ST1.RS incorporates two yellow 4 mm IP20 test sockets, providing convenient access for measurement and diagnostic equipment without disturbing permanent field wiring. Its sliding-link disconnect mechanism allows controlled circuit isolation, while the spring incorporated beneath each wire clamp helps maintain contact pressure even if the screw clamp becomes loose, making the design particularly suitable for safety-critical CT test circuits.

Rated at 24 A and 400 V IEC, the 1SNA115831R0400 has a rated cross-section of 6 mm² and accepts rigid conductors up to 10 mm². Its narrow 8 mm profile and compatibility with G32, TH35-7.5 and TH35-15 DIN rails provide flexible integration into industrial metering, protection and control-panel assemblies.

Key Advantages

• Purpose-designed test disconnect safety terminal for CT and energy circuits.
• Integrated screwdriver-operated sliding link provides controlled circuit isolation.
• Includes two yellow 4 mm IP20 test sockets for convenient measurement access.
• Spring-loaded safety screw clamps help maintain contact pressure if a clamp screw becomes loose.
• 24 A IEC rated current and 400 V IEC rated voltage.
• Rated conductor cross-section of 6 mm², with rigid conductors accepted up to 10 mm².
• Compact 8 mm terminal width supports efficient panel layouts.
• Compatible with G32, TH35-7.5 and TH35-15 DIN rails.

Key Features

• TE Connectivity / Entrelec SNA series.
• D6/8.ST1.RS.IP20 safety test disconnect configuration.
• Two-position, single-level terminal block.
• Sliding-switch disconnect mechanism.
• Two integrated 4 mm IP20 test sockets.
• Spring-loaded safety screw-clamp connections.
• 24 A IEC current rating.
• 400 V IEC voltage rating.
• 6 kV rated impulse withstand voltage.
• 720 A short-time withstand current for 1 s.
• 8 mm terminal spacing.
• Grey polyamide insulating housing.
• Designed particularly for current-transformer test and energy applications.

Safe Testing and Isolation of Current-Transformer Circuits

Current-transformer circuits require carefully controlled testing and isolation to maintain safe and reliable measurement and protection systems. The D6/8.ST1.RS is specifically designed for these applications, combining a sliding-link disconnect with spring-loaded safety screw clamps that help maintain conductor contact pressure even if the primary clamp screw becomes loose.

Two integrated 4 mm IP20 test sockets provide direct access for compatible measuring equipment, reducing the need to disturb permanent wiring during commissioning, diagnostics and maintenance. Combined with its 24 A rating, 6 mm² rated cross-section and DIN-rail mounting, the 1SNA115831R0400 provides a practical test-interface solution for energy, metering and industrial protection systems.

Typical Applications

• Current-transformer (CT) secondary circuits.
• Energy metering and monitoring panels.
• Protection relay circuits.
• Electrical measurement and instrumentation systems.
• Industrial switchgear assemblies.
• Control-panel testing and commissioning.
• Power-generation and distribution equipment.