Bourns MF-USML/X series low resistance PPTC resettable fuses

The Bourns Multifuse Product Line is pleased to announce the introduction of the new 12 V rated Model MF-USML/X series of low resistance surface mount Polymer Positive Temperature Coefficient (PPTC) resettable fuses. The new series includes Ihold current ratings from 1.75 A to 5.5 A at the 12 V maximum rated voltage.

Bourns’ low resistance conductive materials used in this new product series have post-trip resistance values as low as 10 mOhms and initial resistance values as low as 1 mOhms. Such low resistance values help boost the current carrying capability of the devices. The new Bourns Model MF-USML550/12-2 can now achieve 5.5 A Ihold at 12 Vdc in a space-saving 1210 package.

The compact Model MF-USML/X series utilizes Bourns’ innovative freeXpansion™ design that increases the performance of the resettable fuse with:

• Higher hold currents (Ihold)
• Higher voltages (Vmax)
• Improved resistance stability
• Smaller footprints

Features

• Surface mount packaging for automated assembly
• Small footprint size (1210) and low profile for  space-constrained mobile applications
• Ultra-low resistance
• Higher voltage withstand
• RoHS compliant* and halogen free**

Applications​

• Li-ion battery pack protection
• PC and server motherboard protection
• Mobile phone battery and charging protection
• USB port protection
• Power port protection
• Gaming console port protection

_{* RoHS Directive 2015/863, Mar 31, 2015 and Annex.
** Bourns considers a product to be “halogen free” if (a) the Bromine (Br) content is 900 ppm or less; (b) the Chlorine (Cl) content is 900 ppm or less; and (c) the total Bromine (Br) and Chlorine (Cl) content is 1500 ppm or less}