Spurtar Terminal isolator, 125 A continuous / 500 A brief, 15–17 mm

A hundred and twenty-five amps, and the surge figure alongside it.

Two numbers

125 A continuous. 500 A for short periods. That pairing is the whole specification of a battery switch: one figure for the load that runs for hours, one for the second when the starter turns.

Four of the seven switches in this family publish a single number or none. This one, at the lowest price here, publishes both.

Where it goes

The negative post, 15 to 17 mm. That is the earth side on essentially any modern vehicle, and it is where an isolator belongs.

The material

Copper-zinc alloy, named, fitting most vehicle types within that post range.

The gap

Switching under load. Turning an isolator while current flows draws an arc across the contacts, and with an alternator running it is more than a contact question. No switch in this family addresses it.

Availability

German, French, Italian and Spanish Amazon stores quoted 9 € to 10 € when this page was compiled.

British Amazon store carries it too, priced in its own currency, which the euro range above deliberately omits.

American Amazon store returned nothing at all, so the buy button there runs a search instead of landing on an empty page.

These figures are what Keepa reported on the day this page was last updated. Availability and pricing move without notice.