VISHAY
绕线电阻, 300欧姆 1% 5W
ARCOL
电阻器, Aluminium, 300 ohm, 100 W, 1.9 kV, ± 1%, HS Series, 绕线
OHMITE
绕线电阻, 300Ω, 5W, 1%
玻璃釉绕线可调电阻, 300欧姆 10% 50W