1SNA199139R2300 – D4/8,SNT2,ADO

Why Choose the TE Connectivity D4/8.SNT2.ADO Disconnect Terminal Block?

The TE Connectivity D4/8.SNT2.ADO (1SNA199139R2300) is a knife-disconnect terminal block with an integrated test socket, designed for industrial control, measurement and automation circuits that require convenient isolation and testing. Part of the established ENTRELEC ADO System, it combines an ADO insulation-displacement connection with a conventional screw-clamp connection in a compact DIN rail terminal.

A manually operated disconnect knife blade allows the circuit to be opened directly at the terminal, simplifying isolation during commissioning, testing and troubleshooting. The integrated test facility provides convenient access for electrical measurements, while the mixed ADO and screw-clamp termination arrangement combines rapid ADO wiring with compatibility for conventionally terminated conductors.

The D4/8.SNT2.ADO has a rated cross-section of 2.5 mm², a rated current of 15 A and a rated voltage of 500 V. Its compact 8 mm spacing, IP20 main-terminal protection and wide -55 to +110 °C operating temperature range make it suitable for demanding industrial terminal assemblies.

Key Advantages

• Knife-disconnect function enables convenient manual circuit isolation.
• Integrated test socket supports commissioning, measurement and troubleshooting.
• Combines ADO System and screw-clamp connections in one terminal.
• 15 A rated current and 500 V rated voltage.
• Compact 8 mm spacing helps conserve DIN rail space.
• Screw-clamp side accepts flexible conductors up to 4 mm² and rigid conductors up to 6 mm².
• Wide -55 to +110 °C operating range for industrial environments.

Key Features

• TE Connectivity / ENTRELEC D4/8.SNT2.ADO.
• Knife-disconnect terminal block configuration.
• Hand-operated disconnect blade for circuit isolation.
• Integrated test socket.
• Screw clamp – ADO System connection arrangement.
• 2.5 mm² rated cross-section.
• 15 A rated current.
• 500 V rated voltage.
• 6 kV impulse withstand voltage.
• 300 A short-time withstand current for 1 s.
• IP20 main-terminal protection.
• Grey polyamide housing with UL 94V-0 flammability classification.

Reliable Circuit Isolation and Testing

Disconnect terminal blocks provide a convenient way to open an electrical circuit without removing conductors from the terminal strip. On the D4/8.SNT2.ADO, the hand-operated knife blade provides a clear mechanical disconnect point, making the terminal particularly useful for commissioning, fault-finding and maintenance tasks where circuits need to be isolated individually.

The integrated test facility further supports diagnostic work, while the combination of ADO insulation-displacement and screw-clamp termination gives panel builders flexibility when connecting different wiring arrangements. With an 8 mm footprint and standard TH35 DIN rail mounting, the terminal can be incorporated efficiently into densely populated industrial control panels.

Typical Applications

• Industrial electrical control panels.
• PLC and automation cabinets.
• Measurement and test circuits.
• Instrumentation and process control systems.
• Machine control and auxiliary circuits.
• Circuits requiring convenient individual isolation.
• Commissioning and diagnostic terminal assemblies.
• OEM machinery and industrial panel building.