Bourns Secondary DC Circuit Protection Power Supply Solutions

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Secondary DC circuit protection

Protection of end-application equipment on the load side of switched mode power supplies is clearly an important issue. Bourns supplies a range of options with protection devices and solutions for the VDC secondary DC circuit. These include: TVS diodes that deliver very high surge current protection; Multifuse® resettable fuses, which deliver overcurrent surge protection of equipment designed to operate at high operating temperatures; Bourns® TISP™ thyristor surge protectors, ideal for use in telecommunications applications for high-voltage protection; SinglFuse™ devices, which are thin-film chip fuses that deliver a single blow fuse for overcurrent protection; and TBU® high-speed protectors (HSPs), which provide highly effective wide-bandwidth circuit protection.

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Secondary DC Circuit Protection - Table

Product Type	Application	Download datasheet and buy online	Features Overview
Power TVS Diodes	High power DC bus protection Exposed AC/DC power supplies (in wireless base stations, etc.) AC line protection	Download BUY ONLINE	380 V or 430 V standoff voltage Very high surge current protection (3 kA @ 25 °C) Low clamping voltage under surge Excellent surge performance vs. temperature Bidirectional TVS Surface mount package
PTC Resettable Fuses: Multifuse®	Protection of automotive circuitry including engine control modules Overcurrent surge protection of electronic equipment required to operate at high operating temperature ranges Resettable fault protection of general electronic equipment	Download BUY ONLINE	Operating temperature range up to +125 °C Low thermal derating factor Higher hold currents at elevated temperature RoHS compliant* *RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
Thyristor Surge Protectors, TISP™	Digital telecommunication lines Low voltage electronics	Download BUY ONLINE	Safety Extra Low Voltage (SELV) values Low voltage overshoot Low capacitance RoHS compliant* *RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
SinglFuse™	RoHS compliant* and halogen free Thin film chip fuse Surface mount packaging for automated assembly	Download BUY ONLINE	Single blow fuse for overcurrent protection 1005 (EIA 0402) miniature footprint Fast-acting fuse Slow blow fuse UL certified
TBU® High-Speed Protectors (HSPs)	Protection modules and dongles Process control equipment Test and measurement equipment General electronics Ethernet ports	Download BUY ONLINE	Superior circuit protection Overcurrent & overvoltage protection Blocks surges up to rated limits High speed performance Small SMT package