150A Two Position Rotary Battery Isolator Switch ON-OFF Marine Battery Disconnect Switch for Boat

Buyers who stock and resell isolator switches care about three things: the part must be consistent batch to batch, the rating must be honest, and the packaging must survive export handling. The MT019 is built for that trade. It is a 150 amp, ON-OFF rotary disconnect rated for 12 to 24 volt DC systems, supplied with a fixed bill of materials so the unit you receive in month six matches the sample you approved.

Operation is deliberately plain: rotate to ON for a live circuit, rotate to OFF for full isolation. Two hard-stopped positions, no selector contacts, no combined-bank link. Service technicians and end users both understand it without a manual.

Inside, a copper conductor assembly carries the current and the moulded housing holds a flat mounting flange. Studs are sized for standard crimped ring lugs, which means installers can use the cable and fittings already on the shelf.

• Stable specification — same rating, same footprint and same terminal layout across repeat orders.
• Honest 150A figure — continuous rating matched to mid-size DC boards, not inflated for catalogue appeal.
• 12V and 24V coverage — one SKU satisfies both common system voltages, simplifying stock.
• Export-ready packing — neutral white box inside a brown carton; branded packing available with written authorisation.
• Sample-friendly — low minimum order lets distributors evaluate before committing to volume.

• Marine chandlers — a mid-rating master switch that covers most trailer boats and small cruisers.
• RV and caravan outlets — leisure board isolation for conversions and retrofits.
• Automotive electrical shops — auxiliary battery and accessory fuse block control.
• Equipment dealers — battery isolation on trailers, compressors and yard machines.

1. Isolate the battery negative lead and prove the circuit dead on a meter.
2. Position the switch with clearance for dial travel and cable bend radius.
3. Mark the flange holes, drill, and fix the body down evenly.
4. Battery positive on one stud, distribution feed on the other.
5. Crimp ring lugs on every cable end and torque both nuts firmly.
6. Operate the dial once without load, then reconnect and test under working current.

Store cartons dry and off concrete floors to protect the moulded housings. In service, cycle the dial a few times each season and check nut torque; replace cable with corroded lugs instead of retightening. Leave the switch at OFF whenever the boat or vehicle is stored or handed to a technician.

• Minimum order — 5 pcs.
• Price — negotiable, quoted against quantity and packing requirements.
• Capacity — 50,000 pcs per month.
• Lead time — 30 days for standard production.
• Payment — T/T or Western Union; 30% deposit with the balance before shipment.
• Packing — neutral white box inside a brown carton; branded packing available with written trademark authorisation.