Board-level protection in a 1206 footprint
The 0ZCJ0035AF2E: This footprint is a standard size for low-current overcurrent protection on dense PCBs, and the concave termination style suits automated pick-and-place assembly. Rated for 350 mA hold current (Ih) and 750 mA trip current (It), with a maximum interrupt rating of 40 A at 30 VDC. The initial resistance is 300 mOhms minimum, rising to 1.2 Ohms max after a trip event — a typical recovery curve for a polymer PTC that self-heats to latch into a high-resistance state under fault. This part is qualified to AEC-Q200, the automotive passive-component stress-test standard, and carries cURus and TUV agency approvals.
What the hold and trip ratings mean for your circuit
The 350 mA hold current is the maximum steady-state current the PTC can carry at 25°C ambient without tripping. In a 12 V automotive bus or a 24 V industrial sensor loop, this fuse sits below the nominal load current of the protected branch — it protects the wiring and downstream components, not the power supply. The 750 mA trip current is the threshold at which the device transitions from low-resistance to high-resistance within 100 ms (typical). The 40 A maximum fault current rating means it safely interrupts a short-circuit current up to that level without rupturing the package — critical for surviving a dead-short on a battery rail. Post-trip resistance of 1.2 Ohms max limits the leakage current through the tripped PTC to roughly 25 mA at 30 V, which is low enough to keep the protected circuit de-energised until the fault is cleared and the device cools back below its hold threshold.
Automotive-grade qualification and compliance
AEC-Q200 qualification means this PTC has passed the full suite of passive-component stress tests: temperature cycling, moisture resistance, mechanical shock, vibration, and solder-heat resistance. For an automotive Tier 1 or an industrial control design requiring PPAP-level documentation, this certification streamlines the approval process. The cURus and TUV marks confirm the device meets North American and European safety standards for overcurrent protection devices.
Active production — sourcing posture
The 1206 package is a standard reel format (Tape & Reel or Cut Tape), so MOQ and lead time depend on the reel quantity and current factory backlog.