Isolator Switch 12V/24V Battery Isolator Disconnect Max 200A For Car, Truck, Boat, Vehicles Power Cut Off Kill Switch

Leave a 4WD parked for a fortnight and the alarm, the head unit memory and the dash cam quietly pull the battery down. A key-operated isolator on the negative terminal breaks the circuit properly, so the vehicle sits with nothing drawing from it until you put the key back in.

Stopping the slow drain

Parasitic draw is why a healthy battery is flat after a holiday. This is a two-position on/off disconnect, and the supplier recommends mounting it on the negative battery terminal so one turn isolates the whole system. Two keys come with it, and the key can only be withdrawn when the circuit is disconnected, so a glance at the terminal tells you the state of the vehicle. A waterproof cap covers the barrel against dust and water, which counts on a boat trailer or a tray-back that lives outside.

Read the ratings, not just the headline

The supplier publishes several current figures and they do not agree, so all of them are reproduced below. The title quotes a maximum withstand current of 200 A at 12 V. The specification block then gives standard parameters of 100 A DC continuous, 150 A DC intermittent and 500 A DC cranking, and separately lists recommended safe application parameters of 70 A DC continuous, 100 A DC intermittent and 300 A DC cranking. The conservative recommended figures are the ones to design an installation around.

Key features

• Two supplied keys: removable only when the circuit is disconnected.
• Waterproof keyhole cap: keeps dust and water out of the barrel.
• Negative terminal mounting: the supplier's recommended position.
• Flush or surface mount: let into a panel or bolted onto one.
• Two-position operation: on or off, with no partial state to misread.

Specifications

• System voltage: 12-24 V DC
• Maximum withstand current: 200 A at 12 V (title and supplier operation line)
• Standard rating, continuous: 100 A DC
• Standard rating, intermittent: 150 A DC
• Standard rating, cranking: 500 A DC
• Recommended safe rating, continuous: 70 A DC
• Recommended safe rating, intermittent: 100 A DC
• Recommended safe rating, cranking: 300 A DC
• Terminals: stated as two brass terminals at 5/16" in one place and a 10 mm pin diameter in another
• Material: stated as ABS plastic, nylon plastic and copper in one place, and aluminium alloy, plastic and solid brass screw, nut and washers in another
• Melting point: 80-120°C, described as melting without igniting
• Mounting: flush or surface

What's in the box

• 1 x battery disconnect switch
• 2 x keys
• 1 x waterproof cover

Before you fit this

• The current ratings above are the supplier's own and they conflict. Size your installation against the lowest published figure rather than the 200 A headline.
• Terminal size is given two different ways. Measure your battery cable lugs against the photos before ordering.
• Disconnect the battery before fitting, and have the work checked by a qualified auto electrician if the vehicle carries an alarm, ECU-backed memory or a dual-battery setup.

For a vehicle, boat or caravan that sits between trips, it is the simplest way to make sure the battery is still there when you get back.

Returns, Refunds and Replacements

Products that are received faulty, damaged, or not as described are eligible for a return, refund, or replacement in accordance with the Australian Consumer Law (ACL). We are committed to ensuring all products meet the standards of quality and reliability expected by our customers. However, please note that we do not accept returns or provide refunds for change of mind. We encourage you to carefully consider your purchase to ensure it meets your needs and expectations.

Delivery Timeframe

Please note that we cannot guarantee the exact date of arrival, and the delivery timeframes (excluding weekends and public holidays) are as follows:

• For customers in Victoria, approximately 7-10 working days;
• For customers in NSW, SA, ACT, and QLD, approximately 9-12 working days;
• For customers in WA, NT, and TAS, approximately 9-12 working days.