H3038 Mackay 7205 Dunbier Breakaway Switch | Marine Trailer Part
H3038 Mackay 7205 Dunbier Breakaway Switch | Marine Trailer Part
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✓ Authorised Volvo Penta Dealer · Marine & auto specialists · Ships Australia-wide
🔧 Product Description
Mackay Trailer Breakaway Switch with Pull Cable – Part Number: H3038
A replacement emergency breakaway switch for electric or electric-over-hydraulic trailer braking systems. If the trailer separates from the tow vehicle, the tether pulls the switch pin and commands the trailer brakes to apply.
⚙️ Key Features
- Emergency trailer-separation switch
- Pull-pin and tether-cable operation
- Weather-resistant trailer mounting
- Suitable for compatible breakaway braking systems
- Replacement for damaged or corroded switch assemblies
📏 Specifications
- Mackay reference: H3038
- Dunbier reference: 7205
- Electrical configuration must match the breakaway battery and actuator/controller
- Cable length and mounting position must allow independent operation
🔄 Cross Reference & Related Parts
- Mackay: H3038
- Dunbier: 7205
- Used with compatible AL-KO iQ7, Hydrastar or electric-brake breakaway circuits subject to wiring design
🚤 Trailer Compatibility & Application
- Suitable for trailers legally requiring automatic emergency brake application
- The tether must attach to the tow vehicle independently of the safety chains
🔌 Function
Closes or changes the emergency circuit when its pin is pulled, activating the trailer brakes after separation.
⚠️ Common Signs of Failure
- Pin is seized or difficult to remove
- Cable is frayed, kinked or too short
- Switch housing is cracked or water-damaged
- Breakaway test does not activate the brakes
- Electrical terminals are corroded
🛠️ Installation & Safety
- Wire according to the actuator or breakaway-system instructions
- Mount so the cable pulls in a straight path
- Do not loop the tether around a safety chain
- Test the system and battery condition regularly
- Reinsert the pin before normal towing
📦 Condition
- Brand new Mackay trailer component
- Supplied as one breakaway switch with pull pin and cable
- Supplied in original or equivalent packaging
Shipping & Delivery
Shipping & Delivery
Flat-rate shipping Australia-wide — $14.99 per order, no matter how many parts you add. Orders dispatch from our Kadina, South Australia store. Need it urgently or want to collect in person? Call us on 0412 532 984 before ordering.
Returns & Warranty
Returns & Warranty
14-day change-of-mind returns — if it's not right or you ordered the wrong part, send it back within 14 days in new, unused condition for a refund or exchange. Manufacturer warranties apply to new parts. Full details in our Refunds & Returns policy.
Not sure this fits?
Not sure this fits?
Ask us before you buy — we check part numbers and fitment every day. Call 0412 532 984 (Mon–Fri 8.30am–4.30pm) or message us through the contact page with your engine or vehicle details.
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