Siemens 3RT1 Safety Contactor 3-Pole 150 A 75 kW 400V AC Coil 3RT1055-6LA06

Siemens 3RT1055-6LA06 is a three-pole safety contactor with a 400V AC coil, rated for 150 A operational current and capable of handling 75 kW motor loads at 400V AC. This robust contactor is designed primarily for industrial automation and electrical distribution systems where reliable control and protection of heavy AC motors are essential.

The 3RT1 Series contactor supports installation via DIN Rail and features screw terminals for easy and secure wiring of auxiliary circuits. It includes three normally open main contacts and four auxiliary contacts configured as 2 NO and 2 NC, expanding the control and signaling capabilities within automated control panels.

Engineered for high endurance, the contactor guarantees a mechanical lifetime of approximately 10 million operations, accommodating frequent switching demands typical in industrial environments. It can operate in ambient temperatures from -25°C to +60°C and is rated for installation altitudes up to 2000 meters with high relative humidity tolerance.

With a short-time withstand current of 2727 A for 1 second and 703 A for 60 seconds at 40°C, it ensures reliable cold-start performance. Side-by-side mounting requires no lateral clearance, with forward and vertical spacing at 20 mm and 10 mm respectively.

150 A rated operational current for heavy-duty industrial applications. 75 kW motor load capacity at 400V AC. Three poles with 3 normally open contacts for safe load separation. Auxiliary contacts 2 NO / 2 NC for control and signaling expansion.

Mount type DIN Rail for easy integration into control panels. Wide operating temperature from -25°C to 60°C. Robust mechanical endurance suited for frequent switching cycles. Designed for industrial environments up to 2000 m altitude.

This Siemens 3RT1 contactor is ideal for applications such as three-phase motor starters in industrial plants, control panel automation requiring auxiliary signaling, and retrofit installations employing connection bars for main circuits. Its design complies with CCC, CE, CSA, EAC, and UL standards and is manufactured in Germany, ensuring quality and durability in demanding industrial uses.

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