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Heavy-duty DC system isolation
A genuine Victron ON/OFF switch for safely isolating high-current battery circuits in 12V, 24V, 36V, and 48V systems.
The Victron 275A battery switch gives RV, marine, vehicle, and off-grid builders an accessible master battery disconnect without repeatedly removing live cable lugs. Rated for 275A continuous DC current and 1,250A cranking current for 10 seconds, this Victron battery disconnect switch combines heavy-duty M10 terminals, a removable safety knob, flexible surface or rear-panel mounting, and ignition-protected construction in one professional DC isolation component.
Disconnect selected DC loads and charge sources with one clear manual control.
Alarms, inverters, monitoring equipment, relays, and other standby devices can continue drawing power even when an RV, boat, or off-grid installation appears to be turned off. Routing the selected circuit through this Victron ON/OFF switch allows the battery to be physically isolated for storage, service, or emergency response.
The switch only disconnects conductors wired through it. Direct-to-battery safety loads, chargers, or other bypass circuits remain energized, so the complete wiring diagram should be reviewed before treating it as the system's master disconnect.
Turn the knob to OFF to isolate the selected circuit, then rotate it to the Remove position and take the knob with you. This helps prevent accidental re-energization during maintenance and discourages unauthorized operation while the system is unattended.
The large red control knob provides a clearly visible manual isolation point when a DC system must be shut down quickly. This switch does not replace a fuse or circuit breaker and does not trip automatically during a short circuit or overload.
High-current capacity, robust terminals, and ignition-protected construction.
RV, marine, vehicle, solar, battery-bank, and inverter isolation.
Professional mounting options for electrical boards, battery compartments, dashboards, and control panels.
Surface mounting keeps the full enclosure accessible on a backboard. Rear-panel mounting places the body behind the panel so the knob remains prominent on the finished surface. Victron includes an actual-size mounting template, four screws, and interchangeable circuit labels.
To achieve the full published current rating, Victron specifies 120mm² / 4/0 AWG cables on both terminals. Connect the switch in the positive conductor, use M10 / 3/8 in lugs, tighten the terminal nuts to 8N·m, and keep the upward-facing cable-access panel installed to reduce the risk of water entry.
Common components used alongside a master disconnect switch.
Exact electrical ratings, terminal details, mounting data, and included components.
| Product identification | |
|---|---|
| Manufacturer | Victron Energy |
| Product | Battery Switch ON/OFF 275A |
| Part number | VBS127010010 |
| Function | Manual DC battery and circuit isolation switch |
| Suitable system voltage | Battery systems up to 48V nominal |
| Maximum DC operating voltage | 60V |
| Warranty | Victron standard 5-year limited warranty, subject to policy and dealer support |
| Electrical ratings | |
| Continuous DC current | 275A |
| Short-duration DC current | 455A; current manual states 5 minutes, while the separate data sheet labels it one minute |
| Peak / cranking current | 1,250A for 10 seconds |
| Switching under load | Permitted, but alternators, motors, and sensitive DC loads should be turned off first |
| Overcurrent protection | Not included — a correctly rated fuse or circuit breaker is still required |
| Terminals and cabling | |
| Terminal size | M10 / approximately 3/8 in / 9.53mm |
| Terminal material | Tin-plated copper |
| Hex-nut material | Tin-plated copper |
| Recommended terminal torque | 8N·m / 70lbf·in |
| Maximum terminal torque | 12.5N·m |
| Cable size for full published rating | 120mm² / 4/0 AWG on all terminals |
| Recommended switched conductor | Positive battery conductor, per Victron installation manual |
| Construction and mounting | |
| Base material | Glass-fiber-reinforced nylon |
| Mounting options | Surface mount or rear-panel mount |
| Rear-panel cutout reference | Approx. 52.5mm knob opening; use the supplied actual-size template |
| Cable access | Four removable side panels; do not remove the upward-facing panel |
| Dimensions | Approx. 2.7 × 3.0 × 2.7 in / 69.5 × 76.3 × 69.5mm per current data sheet |
| Weight | Approx. 0.4 lb / 0.2kg |
| Ignition protection | ISO 8846 / SAE J1171 |
| Published IP rating | Not listed in the current Victron data sheet or manual |
| Included items | |
| Battery switch | Included |
| Mounting template / instruction booklet | Included |
| Interchangeable label sheet | 16 circuit labels included |
| Mounting screws | 4 included |
| Removable control knob | Included |
Victron's current manual and separate data sheet differ on the duration assigned to the 455A short-term rating. The manual lists 5 minutes; the data sheet labels it one minute. Verify the latest revision before designing a system that will operate near this limit.
Turn connected alternators, motors, and sensitive equipment off before opening the switch whenever possible.
Although Victron rates the switch for operation under load, opening a high-current DC circuit can create arcing and voltage transients. Correct cable sizing, torque, overcurrent protection, mounting orientation, and professional commissioning are essential. Follow the Victron manual and all applicable marine, RV, vehicle, and electrical standards.
Common questions about current ratings, 48V compatibility, mounting, cabling, fusing, and safe operation.
Victron's installation manual instructs installers to place the switch in the positive battery cable. One switch terminal connects to the battery-positive conductor, and the other connects to the positive conductor feeding the selected load circuit, alternator circuit, or second battery. Final switch location, fuse placement, and cable routing should follow the requirements of the complete RV, marine, vehicle, or off-grid system.
Yes. Victron states that the Battery Switch ON/OFF 275A is suitable for battery systems up to 48V. Its published maximum DC operating voltage is 60V, providing the required operating margin for correctly designed nominal 48V battery systems.
That depends on the inverter's maximum continuous DC input current, surge current, battery voltage, efficiency, cable length, ambient temperature, and system design. The switch is rated for 275A continuous DC current. Do not size it from inverter wattage alone; confirm the inverter manufacturer's DC-current requirements and apply the appropriate engineering and regulatory margins.
Victron publishes a 1,250A peak cranking rating for 10 seconds. Its current manual lists a 455A five-minute DC rating, while the separate product data sheet labels 455A as a one-minute rating. If your installation will operate near the short-duration limit, verify the latest Victron documentation with your dealer before finalizing the design.
The switch uses M10 terminal studs, also identified by Victron as approximately 3/8 inch / 9.53mm. Use correctly sized, high-quality lugs, install the supplied hardware correctly, and tighten the terminal nuts to Victron's recommended 8N·m torque. The manual lists 12.5N·m as the maximum torque.
Victron's manual specifies 120mm² / 4/0 AWG cable on all switch terminals to meet the full published current rating. A lower-current installation may use a different engineered conductor size, but cable ampacity, insulation temperature rating, run length, voltage drop, termination quality, and applicable codes must all be considered.
Yes. Rotate the switch to OFF, then turn it a further 30 degrees to the Remove position and pull the knob out. With the knob removed, the switch remains off. Victron identifies this as useful during maintenance or when an unattended system should not be switched on accidentally.
Yes. The Battery Switch can be surface mounted or rear-panel mounted for a cleaner panel-style installation. Victron includes a mounting template and four mounting screws. Check the official dimension drawing and the panel thickness requirements before cutting the opening.
Victron states that the switch is suitable for switching under load. However, if alternators, motors, or sensitive DC loads are connected, Victron instructs users to turn those devices off before disconnecting the DC supply. This reduces arcing and protects connected equipment.
No. The Victron battery switch is a manual isolation device; it does not automatically open during an overcurrent or short circuit. The battery circuit still requires correctly rated overcurrent protection, such as an appropriate fuse or breaker, installed according to the battery, conductor, equipment, and code requirements.
It can isolate the loads and charge sources routed through the switch, helping preserve battery charge during unattended storage. Any device wired directly to the battery and bypassing the switch will remain energized, so the complete wiring diagram must be reviewed before relying on the switch as the system's master disconnect.
Yes. Victron lists ISO 8846 / SAE J1171 ignition protection and states that the switch is suitable for use in an engine room. Ignition protection does not replace proper system design, enclosure placement, cable protection, ventilation, or compliance with applicable marine standards.
