M-Series 300A Battery Switch Off/On Key Actuator
Sealed Against Dust & Water Intrusion – To ensure reliable circuit protection for the life of the electrical system installation.
Ignition Protected – Safe for installation in closed compartments with potential explosive gases.
Serrated Flange Lock Nuts – Improves resistance to cable terminal loosening in high-vibration environments.
Flexible Mounting Options – Allow for multiple mounting configurations and a variety of installation types.
Harsh Environment Design – With stainless steel hardware, serrated flange nuts, and high-temperature materials.
Specifications:
- Maximum Voltage (Single Circuit): 48 Vdc
- Maximum Voltage (Selector / Dual Circuit): 32 Vdc
- Stud Size And Thread: 3/8”-16
- Terminal Stud Torque: 120 in-lbs (13.6 N-m)
- Ring Terminal Size Acceptance: 3/8” (M10)
- Mounting Holes: 10 Screw
- Live Switching Rating: 25 Amps
- Ignition Protection Rating: SAE J1171 / ISO 8846
- Bulkhead / Panel – Mounting Hole Size: 2-5/8″ / 2-5/16″
- Cable Size to Meet Rating: 4/0 AWG
This product may not be returned to the original point of purchase.Please contact the manufacturer directly with any issues or concerns.
Quick Guide (pdf)


![Victron BlueSolar PWM Charge Controller (DUO) LCDUSB Charge Control - 12/24VDC - 20A [SCC010020060]](https://www.sailrepairworks.com/wp-content/uploads/2026/10/victron-bluesolar-pwm-charge-controller-duo-lcdusb-charge-control-12-24vdc-20a-s.webp)
![Victron Non-Inverting Remote On-Off Cable [ASS030550220]](https://www.sailrepairworks.com/wp-content/uploads/2026/10/victron-non-inverting-remote-on-off-cable-ass030550220.webp)


![Victron SmallBMS NG [BMS400100300]](https://www.sailrepairworks.com/wp-content/uploads/2026/10/victron-smallbms-ng-bms400100300.webp)

