Welwyn RC55 Precision Resistor 619kΩ 0.25W 0.1%

The Welwyn RC55 series from TT Electronics features axial leaded, precision metal film resistors designed for high-reliability applications. Constructed with a metal film deposited on a high-quality ceramic former, these resistors ensure stable and accurate performance across a wide range of operating conditions.

Nickel-plated steel caps are force-fitted to the former, with termination wires welded to the caps for robust mechanical and electrical integrity. The resistance value is precisely adjusted using a helical cut in the film, and the component body is safeguarded with a specially formulated epoxy coating, protecting it against environmental stress.

Key Specifications

• Resistance: 619kΩ
• Power Rating: 0.25W (250mW)
• Tolerance: ±0.1%
• Voltage Rating: 200V (Limiting element voltage: 350V)
• Temperature Coefficient: ±15ppm/°C
• Operating Temperature Range: -55°C to +155°C

These resistors offer low noise and a negligible voltage coefficient, making them suitable for precision circuitry where signal integrity is critical. Available in a broad range of E24 and E96 decade values from 1ohm to 4Mohm, the RC55 series provides versatile solutions for demanding electronic designs.