Square D Multi 9 Series Undervoltage Release
The Square D (Schneider Electric) Multi 9 Series undervoltage release (Model M9A27108) is a breaker accessory designed to automatically trip the circuit breaker when the control voltage drops below a set threshold. Operating on 24V AC or DC, this fixed-mount device includes an action indicator for visual status confirmation.
Key Features
- Undervoltage release function trips the breaker on voltage loss or undervoltage condition
- Compatible with 24V AC or 24V DC control voltage
- Standard action indicator provides visual confirmation of device status
- Fixed mount design for secure installation within the Multi 9 breaker system
- Compact dimensions: 82.5 H x 18 W x 68 D mm
Specifications
- Series: Multi 9
- Model: M9A27108
- Manufacturer: Square D (Schneider Electric)
- Control Voltage: 24V AC/DC
- Product Type: Undervoltage Release
- Mount Type: Fixed
- Action Indicator: Yes
- Dimensions: 82.5 H x 18 W x 68 D mm
Applications
Used with Square D Multi 9 series circuit breakers in industrial control panels, motor control centers, and commercial distribution boards where automatic tripping on undervoltage or power loss is required. Provides added protection for sensitive equipment and processes that must not operate under low-voltage conditions.

