Product Overview The 3900 Series Metal Lever Switch is a double-pole, 16A-rated switch engineered for heavy-duty industrial equipment. Combining a fire-resistant metal housing with a flame-retardant PA66 base, it delivers IP66 protection, a 200,000-cycle mechanical lifespan, and customizable LED illumination for demanding operating environments. Each unit is UL-certified (E534983) and ships with a factory-installed waterproof sealing ring, ensuring 100% OEM quality and