Blue Sea Systems 4-Position Mini Selector Battery Switch, Black m-Series — Compact ignition-protected rotary switch

The Blue Sea Systems 4-Position Mini Selector (6007200 m‑Series) is a compact, ignition-protected battery switch that selects or combines a single battery to power a single load group with flexible mounting for tight spaces.

This compact rotary battery switch was built to simplify basic battery control on small boats, tenders, and panel-limited installations. Its small footprint, three mounting options, and ignition protection let you place it where full-size switches won't fit while keeping rear contacts enclosed. Durable tin-plated copper studs and a tactile removable knob make connections and operation straightforward, even in low-light or cramped engine-room locations.

How does the 4-position selector manage battery power?

The selector lets you isolate the battery, switch the battery to the load, or combine banks when you need extra starting or radio power. A make-before-break contact architecture maintains continuity when switching positions, reducing the risk of momentary power interruptions.

• Switch positions include OFF, Battery A, BOTH/COMBINE, and Battery B for simple control
• Make-before-break contacts preserve power during transitions
• Combine function lets you draw from both batteries for starting or emergency use

Where can I mount this switch on my boat or panel?

The unit offers three mounting styles—surface, front panel, or rear panel—so you can install it in limited spaces or integrate it into existing switch panels. The compact body and isolating cover make it suitable for places with restricted clearance or where rear contact protection is required.

• Surface mount for quick installation on bulkheads or cabinet faces
• Front-panel mount for clean, flush control panels
• Rear-panel mount when access behind the panel is limited

Is this safe to use in an engine compartment with gasoline engines?

Yes. The switch includes ignition protection designed for gasoline-engine spaces, reducing spark risk in volatile environments. An isolating rear cover and snap-on sections help protect terminals from accidental contact during routine maintenance.

• Ignition-protected housing suitable for gasoline engine rooms
• Snap-on isolating cover shields rear contacts
• Tactile knob supports safe operation in low light

What wiring and durability features should I expect?

Tin-plated copper terminal studs are manufactured as a single piece and provide enough length for multiple cable terminations and secure fastening. The switch’s construction supports routine marine use where space, reliable connections, and easy servicing matter.

• Single-piece tin-plated copper studs for corrosion resistance and multiple cable connections
• Removable knob for preventing accidental switching during service
• Compact case designed for long-term marine use in confined locations

Who is this for? The Blue Sea Systems 4-Position Mini Selector is aimed at boat owners, small-craft builders, and marine electricians who need a reliable, space-saving battery control for a single load group. It's ideal when panel real estate is limited, ignition protection is required, or a straightforward emergency-combine feature is desired without the bulk of full-size battery switches.