1sna115438r1200 – disconn lever 6mm test skt

Why Choose the TE Connectivity 1SNA115438R1200 M4/6.SNBT Disconnect Terminal Block?

The TE Connectivity 1SNA115438R1200 is an M4/6.SNBT screw clamp disconnect terminal block designed for signal isolation, testing and fault-finding in industrial control and instrumentation circuits. Part of the established ENTRELEC SNA range, it combines a manually operated blade disconnect with built-in test access in a compact 6 mm terminal profile.

The M4/6.SNBT features a blade disconnect that can be operated by hand or with a screwdriver, allowing a circuit to be isolated without removing the connected conductors. Two integrated 2 mm diameter test sockets provide convenient access for measurement and diagnostics, making the terminal particularly useful during commissioning, servicing and troubleshooting.

Rated at 20 A and 400 V IEC, the 1SNA115438R1200 accepts flexible and rigid conductors from 0.5–4 mm². Its grey Polyamide 6.6 housing, IP20 protection, UL 94 V-0 flammability rating and compatibility with G32, TH35-7.5 and TH35-15 DIN rails provide a dependable solution for professional industrial panel construction.

Key Advantages

• Integrated blade disconnect allows circuits to be isolated without removing wiring.
• Two built-in 2 mm test sockets simplify circuit measurement, diagnostics and commissioning.
• Blade can be operated by hand or with a screwdriver for convenient circuit isolation.
• 20 A IEC current rating and 400 V IEC voltage rating.
• Compact 6 mm spacing helps maximise available DIN rail space.
• Same profile as the M4/6 feed-through terminal family, supporting aligned marking in mixed terminal assemblies.

Key Features

• TE Connectivity / ENTRELEC M4/6.SNBT disconnect terminal block.
• Blade disconnect mechanism.
• 2 × 2 mm diameter built-in test sockets.
• Two-position, single-level configuration.
• Screw terminal connection.
• 4 mm² rated conductor size.
• 300 A short-time withstand current for 1 s.
• Designed for signal circuit applications.

Convenient Circuit Isolation and Testing

Disconnect terminals are particularly useful in control and instrumentation systems where engineers need to isolate individual circuits during commissioning, measurement or maintenance. The M4/6.SNBT allows this to be achieved through its integrated blade mechanism, avoiding the need to remove conductors from the screw clamps whenever a circuit needs to be opened.

The addition of two built-in 2 mm test sockets provides direct access for suitable test equipment while the wiring remains installed. Combined with its compact 6 mm profile and 20 A, 400 V IEC ratings, this makes the ENTRELEC M4/6.SNBT a practical choice for control panels that require regular testing, commissioning and fault diagnosis.

Typical Applications

• Industrial control and automation panels.
• Signal circuit isolation and testing.
• Instrumentation and measurement circuits.
• PLC and process control systems.
• Machinery commissioning and fault-finding circuits.
• DIN rail assemblies requiring accessible test points and circuit isolation.