The Alu-Heatbed MK3 have features similar to MK2 and you can also operate this board with 12V or 24V.
Heatbed with 3.2mm Aluminum Core. Print directly on the heatbed, no need for glass plate. It's a much lighter solution than PCB heatbed + glass, which makes it better for faster prints.
Dual power supply. Operate at 12V or 24V. You can use thinner wires when operating at 24V.
A central mounting hole on the front side to allow for three point mounting. This is much easier for bed leveling in comparison to 4 point mounting. First level the side with two holes and fix in place, then level the side with one hole.
Large solder pads for multiple wires (ribbon cable) or a SMD pinhead connector can be mounted.
Pads for SMD thermistor 1206
Dimensions 214mm x 214mm
1 layer 35μm (1oz base) copper
Resistance between 1.4 and 1.6 ohm for the 12V
Resistance between 5.0 and 5.4 ohm for the 24V
100 degree Celsius possible for both 12V and 24V
With 15V on the 12V terminals will maintain approx. 115 degree Celsius without regulation
Running 24V on the 12V terminals will heatup the heatbed to 100 degree in only 2 minutes (Your printer controller will regulate the power to the heatbed in order to get your preset temperature.)
180 degree Celsius max. temperature
When connecting the heatbed in the 12V setting it is important that you connect solder pad 2 and 3 directly on the heatbed.
Recommended NTC: EPCOS - B57621C104J62 - THERMISTOR, 100K "or whatever thermistor you normally use."