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RUSBF250-AP is listed in the Ptc Resettable Fuses range at ChipApex. The manufacturer field lists Littelfuse Inc.. Its product description is PTC RESET FUSE 16V 2.5A RADIAL. Review the specifications below when checking this part for your BOM.
The Littelfuse RUSBF250-AP is a polymer PTC self-resetting fuse from the PolySwitch RUSBF series, designed for through-hole radial mounting. It features a maximum holding current of 2.5 A and a trip current of 5 A at a maximum voltage of 16 VDC. The device offers a maximum interrupting rating of 40 A and an initial resistance of 20 mOhms, rising to a maximum post-trip resistance of 60 mOhms. It operates within a temperature range of -40°C to +85°C and has a lead spacing of 3.00 mm.
Verify that the specific suffix matches project requirements, as variations may exist. Confirm RoHS compliance status and agency approvals such as UL or CSA are required for the target market. Ensure thermal management considerations align with the specified operating temperature range during integration.
Select this component when a resettable protection solution is preferred over traditional fuses. Evaluate the holding current against normal operating loads to prevent nuisance tripping. Consider the trip current margin relative to potential surge currents in the application circuit.
This part belongs to the RUSBF series of radial lead PTC resettable fuses. These components are engineered for compact circuit protection where space constraints and resettable functionality are critical design parameters.
Public confirmed substitute: 0ZRG0250FF1E (Bel Fuse Inc.). Verify electrical parameters and physical dimensions before substitution.
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