Siemens 3VJ9118-0AA21 – Alarm Switch for 3VJ11 MCCB (125A)

The Siemens 3VJ9118-0AA21 is an alarm switch accessory designed for SENTRON 3VJ11 125A MCCBs. It provides a remote indication signal when the MCCB trips due to an overload or short-circuit fault. The key difference from the 0AA11 variant is that this model is mounted on the right side of the MCCB.

🔹 Description

The 3VJ9118-0AA21 is installed inside the accessory compartment of a 3VJ11 125A MCCB and provides 1 changeover contact (1CO) for remote trip indication. It can be connected to PLCs, alarm annunciators, SCADA systems, or control circuits for monitoring breaker fault conditions.

🔹 Key Features

• Siemens SENTRON 3VJ Series accessory
• Model: 3VJ9118-0AA21
• Type: Alarm Switch
• Suitable for: 3VJ11 125A MCCB
• Contact Configuration: 1 Changeover Contact (1CO)
• Mounting Position: Right Side
• Provides breaker trip indication
• Compact accessory design
• Reliable signaling and monitoring
• Easy integration with PLC and control systems
• Industrial-grade durability and long service life