Veroboard Constant Voltage Triac Dimming LED Driver works with any standard Leading Edge MLV, TRIAC, or nearly many Lutron/ Leviton dimmers. The dimmer switch installed should be on the 120VAC side of the LED driver.
The LD040D-VA34012-M30 is a Triac dimmable constant voltage LED driver that can handle a maximum load of 40W and has a 12V DC output voltage. It has an input voltage range of 120V AC, an input current of 0.67A, and an input frequency of 50-60 Hz. The driver is capable of Triac/Phase-cut dimming, and it is rated IP20 for dry and damp locations.