10 Watt, 20 Ohm “Sandbar” Resistor

A 10 Watt, 20 Ohm wirewound resistor is a power resistor designed to handle significant heat, featuring a resistive wire element wound around a ceramic core, often encased in aluminum or cement for heat dissipation and safety, used in high-current DC circuits like inverters, motor controls, and speaker systems, typically with ±5% tolerance and axial leads for easy mounting.
Key Specifications
Resistance: 20 Ohms (Ω)
Power Rating: 10 Watts (W)
Construction: Wirewound (metal wire on ceramic core)
Tolerance: Usually ±5% (J), but 1% versions exist
Housing: Aluminum Shell or Cement Filled
Terminals: Solderable axial leads
Typical Features & Applications
Heat Dissipation: Aluminum or cement casings help manage heat, allowing for safe operation at higher power levels.
High Stability: Known for reliability and accuracy in demanding conditions.
Pulse Withstanding: Robust construction handles current surges well.
Applications: Inverters, LED lighting, frequency dividers, motor speed controls, audio systems, and other industrial uses.
Physical Characteristics
Dimensions: Varies slightly by manufacturer but generally compact (e.g., around 1.8-2 inches long, 0.3-0.4 inches wide/diameter).
Mounting: Often includes a mounting hole on the aluminum case for secure attachment.