Device identity and key parametrics
The 0603L010YR is a Littelfuse POLY-FUSE® series polymeric PTC resettable fuse in a standard 0603 (1608 Metric) concave surface-mount package. Rated for a hold current (Ih) of 100 mA maximum at 15 V, with a maximum interrupt current of 40 A — the device trips in 1 second at the specified fault condition. The initial cold resistance is 900 mOhms minimum, rising to 6 Ohms maximum after a trip event, which defines the series resistance added to the protected circuit.
Occupies a 1.60 mm x 0.80 mm footprint with a maximum seated height of 0.75 mm — the concave termination style is compatible with standard reflow solder profiles for 0603 chip components.
Temperature grade and compliance
Carries cURus and TUV agency approvals, confirming the device meets North American and European safety standards for overcurrent protection components.