TT ELECTRONICS / WELWYN PCF Series SMD Chip Resistor, 49.9kΩ ±0.1%, 0.1W, 0805

The TT ELECTRONICS / WELWYN PCF Series is a precision thin-film SMD chip resistor, offering exceptionally tight tolerance and stability for critical electronic applications. Featuring a resistance of 49.9kΩ with a ±0.1% tolerance, this component is engineered for circuits where accuracy and reliability are paramount, such as in measurement equipment, medical devices, and precision analog circuits.

Constructed using a sophisticated process, a thin-film nichrome material is deposited on a high-purity 96% alumina substrate. The component undergoes a controlled heat treatment to achieve the required Temperature Coefficient of Resistance (TCR) and long-term stability, followed by a precise laser trimming process to achieve the exact resistance value. An epoxy protective coating ensures durability, and the wrap-around terminations are plated with nickel and a 100% tin matte finish, providing excellent solderability.

Key Features & Applications

The 0805 2012 metric package size and rectangular shape make this resistor ideally suited for automated pick-and-place assembly, streamlining high-volume production. Electrical connection to ceramic substrates or printed circuit boards (PCBs) can be achieved reliably via reflow or wave soldering techniques. The passivated range offers superior performance in humid environments, ensuring consistent operation.

With a power rating of 0.1W (100mW) and a voltage rating of 100V, this resistor is designed for a broad range of low-power precision applications. Its operating temperature range spans from -55°C to +125°C, accommodating demanding industrial and automotive environments. The combination of thin-film technology, laser trimming, and robust construction delivers a component that excels in precision, stability, and manufacturability.