Contactor 3P 45A, Coil 20-60 VDC
The ABB AF26ZB-30-11RT-21U is a three-pole contactor rated for 45 A, with a DC coil accepting 20-60 VDC. This places it in the AF26 frame, a compact block design for panel mounting. The 45 A rating covers motor starting and resistive loads in the AC-3 and AC-1 duty classes typical for this frame size.
Coil Voltage Range and Integration
The 20-60 VDC coil range covers common 24 VDC and 48 VDC control buses without needing a separate dropping resistor or converter. At 24 VDC nominal, the coil holds in above 18 VDC dropout. Verify the DC supply is clean and within the lower end of the range for reliable pick-up.