Breaking off the tabs does not "match wattage, it lowers the max wattage of switch because it lessens the cooling ability of the switch. Maestro are very sensitive. You probably damaged the switch. Make sure you have at least 40 watts of load, reset the switch and try again. Also, if you detect a strange odor when you smell the switch, you probably fried the switch.
Lutron Maestro MAW-600 manual:
Single-Pole 600 Watt Halogen/ Incandescent Dimmer (minimum 40 Watt)
http://www.lutron.com/TechnicalDocumentLibrary/0301106A.pdf
Lutron technical support 1.800.523.9466
You said pendant lights blew out.
How many total watts were those lights?
Did you remove aluminum break-away fins on side of device to match wattage?
Front indicator can be pulled out to cut power to circuit.
This is called FASS switch.
Try pulling out FASS switch and then pushing it back to see if it re-sets device.
Click breaker on-off to see if it resets device.
You replaced a single-pole switch that has two wires plug ground wire.
Each wire from switch goes to either screw on MAW-600 so it's hard to go wrong there.
Bare copper goes to green ground screw.
Otherwise, it looks like tech support is next step: 1800-523-9466
http://www.lutron.com/Service-Support/Technical/InstallationInstructions/Pages/InstallationInstructions.aspx?syst=Dimmers+%26+Switches&prodn=Maestro%C2%AE+dimmer+%26+switch
I cannot find a specific troubleshoot manual for Lutron dimmers
So I suggest 4 things:
1) Feel the dimmer switch for heat >>> if it is getting hot (not warm), then that dimmer is dangerous, so remove dimmer immediately, add up your total bulb wattage to make sure you're below the 600 or 1000 watt capacity of you model dimmer
2) Look at the list of manuals shown at link, and make sure your dimmer matches the type of bulb you are using. Your dimmer model number and wattage should be printed on side or back of dimmer.
3) These dimmers use electronics to control the lights. Electronics go bad. The higher the wattage controlled by your dimmer, the more heat, and the shorter the dimmer life.
4) Short in the wires. Replace your dimmer with one from Home Depot and see if the condition persists. If it does, then a short is probably somewhere in that circuit. Troubleshooting a short is another long answer that needs more wiring detail ... please repost if you have a short.
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