Key Lock Marine Battery Isolator Switch IP67 Waterproof 300A Continuous Rating Battery Disconnect Switch

The MT006-K is the key-operated version of our two-stage marine battery isolator: the same 32V / 300A switching platform, but with a lock cylinder in place of the plain knob so the circuit can only be changed by someone holding the key. It is the model to specify where an unattended boat, stored vehicle or shared equipment must not be switched back on by anyone who happens to walk past.
Electrically the unit is unchanged — a 300A continuous rating over a 32V DC maximum, with copper conductor parts and a marine-grade plastic body that carries an IP67 rating for spray, rain and washdown. The 130 x 74 mm footprint and surface-mount base suit existing panel cut-outs, so an owner can upgrade to key security without reworking the console.
In use the key turns through the ON and OFF positions with a firm, two-stage action. Remove the key when the switch sits in OFF and the boat is effectively immobilised at the electrical level — a simple deterrent that costs nothing in daily convenience.

• Controlled access — the circuit changes only with the key in hand, so unauthorised switching is blocked.
• Marina and storage security — leaves a berthed or stored boat electrically dead even when the cabin is accessible.
• Fleet and shared equipment control — supervisors keep the key; operators cannot leave the master live between shifts.
• Same electrical platform — 300A continuous at 32V DC, so nothing changes on the wiring side.
• IP67 sealed body — built for open cockpits, wet decks and hose-down cleaning.
• Two-stage ON/OFF action — positive detents, no ambiguous middle position.
• Existing cut-out fit — 130 x 74 mm surface-mount base replaces a standard isolator directly.

1. Isolate the battery negative before touching any wiring, then confirm the circuit is dead with a meter.
2. Offer the base to the panel, mark the fixing holes and check that the key barrel clears the surrounding fittings.
3. Fix the body down firmly — a surface-mount isolator relies on a flat, rigid base to resist vibration.
4. Land the battery cable on one stud and the load side on the other, using ring lugs and firm torque on both nuts.
5. Test ON and OFF with the key, then remove the key in the OFF position and confirm the circuit stays open.

• Boats and yachts — master isolation on open cockpits, cabin cruisers and small commercial craft.
• RVs and campers — keeping a stored vehicle electrically dead while the body remains accessible.
• Cars, 4x4s and trailers — anti-drain and anti-tamper isolation for long-term parking.
• Workshops and plant — controlled isolation on shared equipment where only supervisors hold the key.

• Minimum order — 1 pc.
• Price — negotiable, quoted against quantity and packing requirements.
• Capacity — 5000 pcs per month.
• Lead time — 15 working days for standard orders.
• Payment — T/T.
• Packing — neutral white box inside a brown carton; branded packing available with written trademark authorisation.