ABB CA4-40E Auxiliary Contact Block, 4 NO, Front Mount, Screw Terminals

Contactors often need additional auxiliary contacts for control signaling, interlocking, or status indication, but built-in contacts are limited. The ABB CA4-40E auxiliary contact block solves this by adding four normally open (NO) contacts to compatible ABB contactors and thermal overload relays, enabling reliable switching of control circuits up to 690 V AC. This front-mounting block snaps directly onto the contactor without tools, saving installation time and reducing wiring complexity.

Who is it for

Electrical engineers, panel builders, and maintenance technicians working with ABB AF09-AF370 or AX09-AX370 contactors, or TA25-TA200 thermal overload relays, who need extra auxiliary contacts for automation and control systems. It is ideal for industrial machinery, motor control centers, and building automation where space is limited and reliability is critical.

Main features

• Four normally open (NO) contacts for versatile control functions.
• Front mounting for quick, tool-free installation on ABB contactors and overload relays.
• Screw terminals ensure secure and durable wire connections.
• Rated operational voltage up to 690 V AC and 250 V DC for broad application range.
• Compact design with IP20 protection, suitable for enclosed control panels.
• Complies with IEC/EN 60947-5-1 standards for safety and performance.

Specifications

• Number of NO contacts: 4
• Number of NC contacts: 0
• Mounting type: Front mounting
• Terminal type: Screw terminals
• Rated operational voltage AC (Ue): 690 V
• Rated operational voltage DC (Ue): 250 V
• Rated insulation voltage (Ui): 690 V
• Rated impulse withstand voltage (Uimp): 6 kV
• Rated operational current AC-15 (220-240V): 4 A
• Rated operational current AC-15 (380-440V): 3 A
• Rated operational current DC-13 (24V): 6 A
• Degree of protection: IP20
• Operating temperature range: -25 to +70 °C
• Compatibility (Contactors): ABB AF09-AF370, AX09-AX370 Series
• Compatibility (Thermal Overload Relays): ABB TA25-TA200 Series
• Standards: IEC 60947-5-1, EN 60947-5-1

Tips

Ensure the contactor is de-energized before snapping on the auxiliary contact block. For optimal performance, use wire ferrules with the screw terminals and tighten to the recommended torque. The block is designed for use in enclosed panels; avoid exposure to direct sunlight or moisture.