Siemens Power contactor, 3-pole, 1NO+1NC, 24VDC, 5.5kWDC Part number 3RT2024-2BB40

Product Overview

The Siemens 3RT2024-2BB40 is a 3-pole SIRIUS 3RT2 power contactor, size S0. It is designed for AC-3 duty up to 12 A and motor loads up to 5.5 kW at 400 V AC, with a 24 V DC control coil and 1 NO + 1 NC auxiliary contacts. The spring-loaded terminals provide easy, secure wiring for industrial control panels.

Key Features

• 3-pole contactor, size S0
• Rated current AC-3: 12 A at 400 V AC
• Rated motor power: up to 5.5 kW at 400 V AC
• Control coil voltage: 24 V DC
• Auxiliary contact configuration: 1 NO + 1 NC
• Spring-loaded terminals for main and auxiliary circuits
• Compact dimensions for efficient panel installation

Technical Specifications

• Article Number: 3RT2024-2BB40
• Series: SIRIUS 3RT2, size S0
• Poles (main): 3
• Rated operational current (AC-3) at 400 V: 12 A
• Rated motor power at 400 V: 5.5 kW
• Control coil voltage: 24 V DC
• Auxiliary contacts: 1 NO + 1 NC
• Insulation voltage (Ui): 690 V
• Surge voltage resistance: 6 kV
• Ambient operating temperature: –25 °C to +60 °C
• Dimensions (approx.): 102 mm height × 45 mm width × 107 mm depth

Compliance & Certifications

• Manufactured according to Siemens SIRIUS industrial control gear quality standards
• Designed in accordance with IEC/EN standards for contactors and motor control equipment

Applications

Used for switching and control of three-phase motor circuits, lighting loads and industrial equipment where up to 12 A AC-3 load at 400 V is required. Ideal for applications in automation panels, machine control systems, HVAC units, pump and compressor starters where reliable operation and compact size (S0) are critical.