Alpha RBF Series

The RBF ultra-precision current sense resistor series from Alpha Electronics offers low resistances of between 0.01Ω and 1Ω all in a small 2-terminal flip-chip package. By utilising Alpha’s Bulk Metal® foil resistor technology, they are able to offer low tolerances down to ±0.5% as well as a low TCR of ±10 ppm/°C (between -25°C and +125°C) both within the resistance range of 0.1Ω to 1Ω.

• Ultra-precision current sense flip-chip resistor
• Available in any resistance between 0.01Ω and 1Ω
• 2-terminal current sense resistor in a flip-chip surface-mount package
• Power rating of 1W at +70°C
• Tolerances as low as ±0.5% over the resistance range of 0.1Ω to 1Ω
• Tight TCR available of ±10 ppm/°C over the resistance range of 0.1Ω to 1Ω
• Maximum rated operating temperature +70°C
• Temperature range from -65°C up to +155°C

The RBF ultra-precision current sense resistor series offer ultra-precision thanks to Alpha’s Bulk Metal® foil resistor technology, making them suitable for the most demanding precision applications.

Temperature rise of resistor surface can be optimised by using a board made of metal. This keeps the temperature rise very low allowing increased power rating of the parts i.e. 2W at +70°C. Please keep the temperature of board less than +90°C when using glazed epoxy board.

The below table gives the full specifications for each resistor model available including the Alpha RBF series:

* Symbols parenthesized are for part number composition