ABB CA4-01 Auxiliary Contact Block 1NC Front Mount Screw Terminals 1SBN010110R1001

The ABB CA4-01 auxiliary contact block adds a single normally closed (NC) contact to ABB AF, AX, and A series contactors, expanding control possibilities without replacing the main device. Its front-mount design clips directly onto the contactor body, keeping wiring accessible and installation quick.

Highlights

• Contact configuration: 0 NO + 1 NC
• Front mounting on ABB AF, AX, and A series contactors
• Rated operational voltage up to 690 V AC / 250 V DC
• Screw terminals accept solid or flexible conductors from 0.75 to 2.5 mm²
• Mechanical durability of 10 million cycles

In daily use

The CA4-01 is a practical choice for control circuits that need a reliable NC signal, such as interlocking, status feedback, or safety-related logic. The screw terminals provide a secure connection, and the compact block does not obstruct adjacent components. With an operating temperature range from -25 to +70 °C, it suits a wide range of industrial environments.

Full specifications

• Contact configuration: 0 NO + 1 NC
• Mounting type: Front mounting
• Compatible contactor series: ABB AF, AX, A
• Rated operational voltage (Ue): 690 V AC / 250 V DC
• Rated insulation voltage (Ui): 690 V
• Rated impulse withstand voltage (Uimp): 6 kV
• Rated operational current (AC-15): 4 A @ 220-240 V, 3 A @ 380-440 V, 2 A @ 500-690 V
• Rated operational current (DC-13): 6 A @ 24 V, 0.55 A @ 125 V, 0.27 A @ 250 V
• Terminal type: Screw terminals
• Degree of protection: IP20
• Operating temperature range: -25 to +70 °C
• Electrical durability: 1.5 million cycles (AC-15)
• Mechanical durability: 10 million cycles
• Wire connection capacity: 0.75 - 2.5 mm² (solid/flexible)
• Tightening torque: 1.2 Nm

Final note

The CA4-01 is a straightforward way to add an NC auxiliary contact to ABB contactors, with ratings that cover common industrial control voltages.