18-08-12, 02:15 AM
Don't know the load current rating of that relay, but 175 watts at 12 volts is nearly 15 amps (volts multiplied by amps equal watts, equally amps can be found by dividing watts by volts ie 175 W/12 V = 14.583 A); maybe the relay is hot due to being at or near its full load capacity (or exceeding it)?