A● SRD-12VDC-SL-C Circulate Time Delay Module Board w Indicator
9,12 €
(You can achieve complete separation of the two power supplies). The board with a power transistor to drive the relay. LED indicates relay status. Borad PCB Size 55 x 28 x 20mm/2.2" x 1.1" x 0.8 (L W).
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