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NPI Body

Multifuse®

The Bourns® Multifuse® PPTC resettable fuse provides overcurrent protection beyond the battery management IC, protecting the battery from surge current while also protecting against overtemperature situations. Under normal operating conditions, the Bourns® Multifuse® PPTC device has a small resistance (10 mΩ max.) that does not affect the operation of the circuit. If the current or temperature exceeds the set operating limits, then the Bourns® Multifuse® PPTC device will switch to a high impedance mode. In this tripped state, it acts like an open circuit and only a very small amount of current can flow through it. Once the condition is cleared and power has been cycled, the Bourns® Multifuse® PPTC device can resume normal operation. The Bourns® Multifuse® MF-USML/X series are new low-power-loss formulation PPTC devices featuring high hold currents (7 A max.) for additional stability and reliability, making them an optimal choice for high capacity battery packs.

wide range of Bourns® Multifuse® PPTC resettable fuse devices are available to meet the needs of Li-ion battery protection. Bourns has been designing its PPTC devices for battery cells for nearly 20 years and the range today covers the traditional axial leaded battery strap design, bare disc devices for cylindrical cells (e.g., AA and AAA) and the latest low resistance, small sized SMD model series using proprietary ultra-high conductive fillers for enhanced resistance stability over the life of the product. The traditional axial leaded straps are available in the model MF-SVS, MF-VS, MF-LR, MF-LS,and MF-S families. These are used in a wide range of battery applications including mobile phones and tablets, powered toys, powered tools, and battery-powered handheld medical devices.

Features

Surface mount packaging for automated assembly.
Tiny footprint size (0402) and low profile for space-constrained mobile applications.
Ultra-low resistance, quick response.
RoHS compliant* and halogen free**.
Agency recognition: cUL, TUV.

Applications

Application includes thermal protection for wearables, Li-ion and polymer battery packs, PC motherboards plug and play protection, mobile phones battery and charging protection, USB port protection, game console port protection.