WELWYN
通孔电阻器, W21系列, 0.51 ohm, 3 W, ± 5%, 100 V, 轴向引线
通孔电阻器, W31系列, 0.51 ohm, 3 W, ± 5%, 100 V, 轴向引线
OHMITE
厚膜电阻, 0.51Ω, 35W, 5%