CA4KN403BW3

What is this control relay used for?

This control relay is intended for control circuit duties such as switching auxiliary circuits, interlocking logic and command functions within industrial panels. It is suited to applications where multiple normally open outputs are needed from a 24 V DC control signal.

How many normally open contacts are included?

It has 4 normally open contacts, making it suitable for applications that need several outputs to close at the same time.

What coil voltage does it require?

This version uses a 24 V DC control coil. For correct operation, the coil should be matched to a 24 V DC control circuit.

Is the coil designed for low power consumption?

Yes. The coil is a low-consumption DC type with approximately 1.8 W inrush power and 1.8 W hold-in power at 20 °C, which can help reduce panel heat build-up.

Does it include built-in suppression for the coil?

Yes. The unit includes a built-in bidirectional peak limiting diode suppressor, which helps manage coil transients in DC control circuits.

How can the relay be mounted?

It can be fitted either on a rail or directly on a plate, giving flexibility for different panel layouts.

What conductor sizes can be used with the terminals?

The spring terminals accept 0.75 to 1.5 mm² conductors. They are suitable for solid conductors and for flexible conductors without cable end ferrules.

What are the main electrical ratings?

The relay is rated for operational voltages up to 690 V and has a conventional free-air thermal current of 10 A at 50 °C. It also has a rated making capacity of 110 A in accordance with IEC 60947.

What is the minimum switching capability?

The minimum switching voltage is 17 V and the minimum switching current is 5 mA. This is useful when assessing suitability for low-level control signals.

How quickly does it operate?

Typical operating times are 30 to 40 ms for coil energisation and normally open contact closing, and 10 to 20 ms for coil de-energisation and contact opening.

What are the physical dimensions?

The relay measures approximately 58 mm high, 45 mm wide and 57 mm deep. Product weight is about 0.235 kg. In the CA4KN403BW3 configuration, this compact format suits space-conscious control panels.

What operating environment is it intended for?

It is designed for operation in ambient temperatures from -25 °C to 50 °C, with storage from -50 °C to 80 °C. It can also be used at altitudes up to 2000 m without derating.

Is it designed for frequent switching?

Yes. It has a mechanical durability of 30 million operating cycles and a maximum operating rate of 6000 cycles per hour, which makes it suitable for repeated control operations.

Which standards and approvals are associated with it?

The relay is aligned with standards including IEC 60947, BS 5424, VDE 0660 and NF C 63-140. Depending on the product documentation version, approvals listed include UL, CSA and UKCA.