OHMITE FC4T Series Metal Foil Chip Resistors offer exceptional TCR ratings and its four-terminal construction are ideal for current sense applications and precise readings for the sensing circuit. These chip resistors feature a flip-chip design and a four-terminal Kelvin configuration that enables current to be applied through two opposite
terminals and a sensing voltage to be measured across the other two terminals. The FC4T chip reistors can operate within the temperature range from -55°C to +155°C with a rated power of 0.5W. These FC4T chip resistors are used in applications involving power management, over current protection, and voltage regulation modules.
OHMITE FC4T Series Metal Foil Chip Resistors
Features
- Economical flip-chip design
- Four-terminal Kelvin connection
- Values as low as 5mΩ with 0.5% tolerance
- Excellent stability with 50ppm TCR
- Industry-standard size of 1206
Applications
- Over current protection
- Power management
- Voltage regulation module
Video
This TTI Tech Specs video for Ohmite Metal Foil FC4T explains the FC4T chip features four terminals, also known as a “Kelvin” configuration. This configuration enables current to be applied through two opposite terminals and a sensing voltage to be measured across the other two terminals, eliminating the resistance and temperature coefficient of the terminals for a more accurate current measurement.
See video transcript below
Video Transcript
If you need current sense resistors, then you’ll flip for Ohmite’s FC4T series. That’s because the FC4T series uses a flip chip design that provides great specs at a lower cost. Resistors are available from 5 to 100 mΩ, with tolerance as low as 0.5%.
The resistors are based on Ohmite’s proprietary Metal Foil technology, with TCR down to ±50 ppm. In addition to the tight tolerance and temperature stability, the FC4T use a four terminal Kelvin configuration to enable highly accurate measurements. This allows designers to exclude the resistance of the terminals and solder joints from the sensing circuit to more accurately calculate current through the resistor. Ohmite offers the FC4T in a 1206 case size with an operating temperature up to 155°C, and the resistors have a half watt power rating up to 70°C.