Welwyn RC55 511k Ohm 0.25W Precision Resistor 0.1% Axial
Precision 511kΩ metal film resistor, 0.25W, ±0.1% tolerance, ±15ppm/°C, axial leaded from Welwyn RC55 series.
The TT Electronics / Welwyn RC55 series is a range of axial leaded, precision metal film resistors, engineered for applications demanding high accuracy and stability. This specific model offers a resistance value of 511kΩ with a tight tolerance of ±0.1% and a power rating of 0.25W (250mW).
The resistor features a high-quality metal film deposited on a ceramic former, ensuring excellent performance and reliability. Nickel plated steel caps are force fitted to the former, and termination wires are welded to the caps for robust electrical connections. The resistor is precisely adjusted to value via a helical cut in the film, and the body is protected with a specially formulated epoxy coating for enhanced durability.
With a temperature coefficient of ±15ppm/°C, this resistor offers excellent stability over a wide operating temperature range of -55°C to +155°C. It also boasts a low noise design, negligible voltage coefficient, and a limiting element voltage of 350V, making it suitable for precision analogue circuits, instrumentation, and measurement equipment.
The axial leaded package ensures easy through-hole mounting on PCBs. Whether used in industrial controls, test equipment, or audio circuits, this resistor delivers consistent and reliable performance.
Key Specifications:
- Resistance: 511kΩ
- Power Rating: 0.25W (250mW)
- Resistance Tolerance: ±0.1%
- Temperature Coefficient: ±15ppm/°C
- Resistor Technology: Metal Film
- Resistor Type: Precision
- Voltage Rating: 200V
- Case / Package: Axial Leaded
- Operating Temperature: -55°C to +155°C
- Precision analogue circuits
- Instrumentation and measurement equipment
- Industrial control systems
- Test and measurement devices
- Resistance: 511kΩ
- Power Rating: 0.25W (250mW)
- Resistance Tolerance: ±0.1%
- Temperature Coefficient: ±15ppm/°C
- Resistor Technology: Metal Film
- Resistor Type: Precision
- Case / Package: Axial Leaded
- Voltage Rating: 200V
- Limiting Element Voltage: 350V
- Operating Temperature Min: -55°C
- Operating Temperature Max: +155°C
- Weight: 0.24 grams
- Product Height: 43mm
- Product Width: 33mm
- Product Depth: 15mm
- Product Range: RC Series
- Resistor Case / Package: Axial Leaded
- SVHC: No SVHC (04-Feb-2026)
Always follow local regulations and product guidance.
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