Hold current and trip behavior
The 1206L500SL-VWR: Rated for a 5 A hold current (Ih) at 25 °C, meaning the fuse stays low-resistance below that continuous load. At 10 A trip current (It) the internal polymer heats and switches to a high-resistance state within 2 seconds (time to trip). Initial resistance is 1 mOhm minimum; after tripping the post-trip resistance rises to 12 mOhm maximum — the ratio gives a quick reset but the circuit sees a higher series resistance until the fuse cools and the polymer re-crystallizes.
Standard reflow profile for a 1206 passive; the concave body sits flush on the pad without tombstoning risk. Surface-mount only. Supplied on tape and reel or cut tape.
Voltage and approvals
Maximum voltage is 6 V — this is a low-voltage rail part (USB, battery, 3.3 V / 5 V bus protection). Maximum interrupt current is 50 A, enough for a direct short on a 5 V supply rail. Carries cURus and TUV approvals, covering North American and European equipment safety requirements.