1sna125438r1400 – m4/6.snbt blue/orange

Why Choose the TE Connectivity M4/6.SNBT 1SNA125438R1400 Disconnect Terminal Block?

The TE Connectivity M4/6.SNBT 1SNA125438R1400 is a blue and orange screw-clamp disconnect terminal block designed for signal circuits in industrial control panels, machinery and automation systems. Part of the established ENTRELEC SNA terminal block series, it combines secure screw termination with a blade disconnect mechanism for convenient circuit isolation, testing and maintenance.

The M4/6.SNBT provides two connection positions within a compact 6 mm pitch. Its blue housing and contrasting orange disconnect element provide clear visual identification, while the DIN rail mounting format allows straightforward integration into modular terminal strips and industrial control assemblies.

Rated for operation at up to 400 V AC with a maximum contact current rating of 20 A, this terminal accommodates conductors up to 4 mm² / 10 AWG. Its integrated test functionality and disconnect blade make it particularly useful for signal circuits where technicians need convenient access for measurement, commissioning and fault finding.

Key Advantages

• Integrated blade disconnect function enables convenient circuit isolation.
• 20 A maximum contact current rating for industrial signal connections.
• 400 V AC operating voltage.
• Compact 6 mm pitch conserves valuable DIN rail space.
• Accepts rigid and flexible conductors up to 4 mm².
• Blue and orange construction provides clear visual identification.
• Integrated test access supports commissioning, measurement and troubleshooting.

Key Features

• TE Connectivity ENTRELEC M4/6.SNBT disconnect terminal block.
• Screw-clamp termination technology.
• Blade-type disconnect mechanism.
• Two connection positions.
• 20 A maximum contact current.
• 400 V AC operating voltage.
• 4 kV IEC impulse withstand voltage.
• 300 A short-time withstand current for 1 s.
• Rigid and flexible conductor capacity of 0.5–4 mm² per screw clamp.
• 9.5 mm wire stripping length.
• 0.5 Nm tightening torque.
• Polyamide housing with UL 94 V-0 flammability rating.
• IP20 ingress protection.

Convenient Circuit Isolation and Testing

Disconnect terminal blocks allow a circuit to be opened directly at the terminal strip without removing the connected conductors. This simplifies commissioning, measurement and fault diagnosis while helping technicians maintain an organised wiring system. The M4/6.SNBT uses a blade disconnect arrangement that provides a clear and practical means of isolating the connected signal circuit.

The terminal's test capability further supports electrical measurements during commissioning and maintenance. Combined with its compact 6 mm width, secure screw-clamp connections and DIN rail mounting, the M4/6.SNBT provides a versatile solution for measurement and disconnect functions in densely populated industrial control cabinets.

Typical Applications

• Industrial signal and instrumentation circuits.
• PLC and process control panels.
• Measurement and test circuits.
• Machine control and automation cabinets.
• Circuits requiring convenient isolation for maintenance.
• OEM machinery and industrial electrical equipment.