Welwyn RC55 267kΩ Precision Metal Film Resistor, 0.25W ±0.1%

The Welwyn RC55 series from TT Electronics comprises axial leaded, precision metal film resistors, engineered for applications demanding high stability and accuracy. These components feature a durable metal film deposited onto a high-quality ceramic former, ensuring consistent performance. Nickel-plated steel caps are force-fitted to the former, with termination wires welded to the caps for a robust and reliable electrical connection. A helical cut in the film allows for precise adjustment to the specified resistance value, and the entire assembly is protected by a specially formulated epoxy coating for enhanced environmental durability.

These resistors are available with a wide selection of tight tolerances, including the featured ±0.1% (B), along with options for ±0.055% (W), ±0.25% (C), ±0.5% (D), and ±1% (F). The low temperature coefficient of ±15ppm/°C minimises resistance drift across a broad operating temperature range from -55°C to +155°C, making them suitable for precision analogue circuits, measurement equipment, and other critical electronic applications.

With a power rating of 0.25W (250mW) and a limiting element voltage of 350V, the RC55 series offers a reliable solution for various circuit designs. Key performance benefits include low inherent noise and a negligible voltage coefficient, contributing to signal integrity and measurement precision. The axial leaded package facilitates easy through-hole PCB mounting, and the resistor body is colour-coded with EIA-standard bands for easy identification.

Key Specifications

• Resistance Value: 267 kilohms (kΩ)
• Power Rating: 0.25 Watts
• Tolerance: ±0.1%
• Technology: Precision Metal Film
• Temperature Coefficient: ±15 ppm/°C
• Operating Temperature Range: -55°C to +155°C
• Voltage Rating: 350V (limiting element voltage)
• Package: Axial Leaded

Ideal for use in a**