Siemens Sirius 3RT1446-1BB40 + 3RH1921 -1FA22 (1 LOT 2 PCS)

1. Siemens SIRIUS 3RT1446-1BB40 Power Contactor

• Type: Power Contactor

Siemens 3RT1446-1BB40 SIRIUS Power Contactor (Size S3)

The Siemens 3RT1446-1BB40 from the SIRIUS 3RT14 series is a robust 3-pole power contactor designed for switching resistive loads (AC-1 duty) up to 140 A at 400 V. This Size S3 contactor is suitable for various industrial applications, including controlling heating loads and distribution circuits.

It features a reliable 24 V DC coil for its control circuit and utilizes classic screw terminals for secure electrical connections of both main and auxiliary circuits. Designed for flexible installation, it can be mounted on a 35mm DIN rail or directly screwed onto a mounting plate. While this model is phased out, it represents a widely used component from the dependable SIRIUS range, compatible with a range of Siemens accessories for expanded functionality.

Key Characteristics:

• Type: Power Contactor (for resistive loads, AC-1).
• Poles: 3-pole.
• Current Rating: Up to 140 A (at 400 V AC-1).
• Size: S3.
• Coil Voltage: 24 V DC.
• Terminals: Screw terminals.
• Mounting: DIN rail or screw fixing.
• Series: SIRIUS 3RT14.

2. Siemens SIRIUS 3RH1921-1FA22 Auxiliary Contact Block

• Type: Auxiliary Contact Block (Front-mounted)

Siemens 3RH1921-1FA22 SIRIUS Front-Mounted Auxiliary Contact Block

The Siemens 3RH1921-1FA22 is a 4-pole auxiliary contact block from the SIRIUS 3RH19 series, designed to easily add signaling and control contacts to compatible Siemens SIRIUS contactors and contactor relays (sizes S0 to S12, including S3 contactors like the 3RT1446). This front-mounted block provides additional contact points without increasing the width of the contactor.

This auxiliary contact block features a contact configuration of 2 Normally Open (NO) + 2 Normally Closed (NC) contacts, allowing for flexible integration into control and feedback circuits. It utilizes reliable screw terminals for electrical connections. The 3RH1921-1FA22 is a simple yet effective accessory for expanding the control capabilities of your SIRIUS contactors. Note that this specific model is phased out, with newer series offering successor options.

Key Characteristics:

• Type: Front-mounted auxiliary contact block.
• Poles: 4-pole.
• Contact Configuration: 2 NO + 2 NC.
• Terminals: Screw terminals.
• Mounting: Front mounting onto compatible contactors/contactor relays.
• Compatibility: Siemens SIRIUS contactors and contactor relays (sizes S0 to S12).
• Series: SIRIUS 3RH19.

Combined Description (for Siemens 3RT1446-1BB40 + 3RH1921-1FA22):

Siemens SIRIUS 3RT1446-1BB40 Power Contactor with 3RH1921-1FA22 Auxiliary Contact Block

This combination features the Siemens SIRIUS 3RT1446-1BB40 power contactor and the compatible 3RH1921-1FA22 front-mounted auxiliary contact block, offering a solution for power switching with expanded control and signaling capabilities.

The 3RT1446-1BB40 is a 3-pole power contactor (Size S3) rated for switching resistive loads up to 140 A at 400 V, controlled by a 24 V DC coil. It is designed for DIN rail or screw mounting and uses screw terminals.

By attaching the 3RH1921-1FA22 auxiliary contact block to the front of the contactor, you add 2 Normally Open (NO) and 2 Normally Closed (NC) contacts. This 4-pole block uses screw terminals and easily mounts onto compatible SIRIUS contactors like the 3RT1446, providing the necessary additional contacts for complex control circuits, interlocking, and status feedback.

Both components are from the reliable Siemens SIRIUS range, known for their performance in industrial automation. Please note that both the 3RT1446-1BB40 contactor and the 3RH1921-1FA22 auxiliary contact block are phased-out models, with newer SIRIUS series offering successor products.