This switch is compact but has a high capacity. It is available as 1 Form A at 10A and 250 V AC, 1 Form A with 1 Form B, and 2 Form A at 8 A and 250 V AC. It offers high sensitivity at 200 mW nominal operating power. The contact structure and independent coil improve the breakdown voltage.
There are 4,000 Vrms for 1 minute between the coil and the contact. Versions are available which offer 10,000 V surge breakdown voltage. There are 1,000 Vrms for 1 minute with 1,500 V surge breakdown voltage between the open contacts. They comply with FCC Part 68 4. Latching types are also offered. Automatic washing is enabled by the sealed construction.
They offer a high insulation resistance with creepage distances between the coil and contact being 8 mm minimum, the DK2a-L2 of 6.8 mm and DK1a1b-L2 of 6.8 mm.