Hold current and trip performance for the 0ZCJ0075AF2E
The Bel Fuse 0ZCJ0075AF2E is a polymeric PTC resettable fuse from the 0ZCJ series, designed for overcurrent protection in circuits where a resettable device is preferred over a one-time fuse. Its 750 mA hold current (Ih) means it will pass up to that current continuously without tripping, and it will begin to trip when the current exceeds 1.5 A (It). The time to trip is 200 ms at the rated current, which is fast enough to protect downstream components from sustained overcurrent events without nuisance tripping on short inrush spikes.
AEC-Q200 qualification and package fit
Approvals include cURus and TUV in addition to AEC-Q200, covering North American and European safety agency requirements for the end equipment.
Resistance and thermal budget
Initial resistance (Ri) is 90 mOhms minimum, rising to a maximum of 290 mOhms after tripping (R1). The post-trip resistance increase is typical for PTC devices and must be accounted for in the circuit's voltage drop budget after a fault event. Rated for a maximum interrupt current of 100 A at 16 V, the device can handle high-fault currents in low-voltage automotive or portable electronics rails without failing short or open.
Temperature range and sourcing posture
The hold current derates at elevated temperatures per the PTC characteristic curve, so at 85°C the effective Ih is lower than the 25°C rating.