Modular contactor ST25-31 modular contactor 3NO+1NC contacts I=25A coil voltage U=230V AC 2 modules

Modular contactor for mounting on 35mm rail

This modular contactor, designated ST25-31, is a reliable solution for controlling electrical circuits. It is designed for direct mounting on a standard 35mm rail, which greatly simplifies its installation and integration with existing infrastructure. Its compact design (2 modules wide) allows for efficient use of space in switchboards.

Construction and application

This contactor uses an electromagnetic switching mechanism, which, when voltage is applied to the coil, immediately switches on the circuit. A red indicator on the housing informs about the current status of the device – on or off. This is particularly useful for visual inspection of the installation status. The purpose of this contactor is primarily to control various loads, such as motors, heaters or lighting.

Parameters and benefits

• Rated current 25A: enables safe and efficient control of circuits with higher current draw.

• Coil voltage 230V AC: standard supply voltage, compatible with most electrical installations.

• Contact configuration 3NO + 1NC: provides flexibility in configuring control and auxiliary circuits. Three normally open (NO) and one normally closed (NC) contacts allow for the implementation of various logical functions.

• AC1 switching power up to 9kW: allows operation of devices requiring significant power, e.g. electric heaters.

• AC3 switching power up to 2.2kW: ideal for controlling medium-power electric motors.

• Width 2 modules: saves space in the switchboard, which is crucial in limited mounting spaces.

• Protection class IP20: provides basic protection against accidental contact and ingress of solid objects.

• Screw terminals 6mm²: allow connection of wires with a cross-section of up to 6 mm², ensuring a solid and safe electrical connection.

• Electrical durability 1x10⁵ cycles: guarantees long-term and reliable operation of the device in demanding operating conditions.

This contactor complies with IEC 61095, which confirms its safety and quality of workmanship. Thanks to its solid construction and high-quality materials, it ensures reliable operation for a long time, minimizing the risk of failures and downtime in the installation.