Solid state relay module SSR-40DA
This relay is used in 3d printing as a heater pad heating controller if the pad uses a voltage greater than 24V.
Advantages of this relay:
- Silent - does not click
- It can handle up to 380V and 40A
Installation:
- There are no terminals (+ and -) of the heating pad on the control board of the 3d printer.
- Connect them with a cable to the terminals on the relay -> 4(-) and 5(+).
- The heating plate / mat has two heating cables (phase(L) and neutral(N)).
- Connect one of the cables directly to the neutral (N) of the 3d printer power source.
- Connect the other cable to the relay terminal 1.
- Connect the relay terminal 2 with a cable to the source phase (L).
This procedure can be applied to all applications where you need to switch AC current.
Parameters:
- Control voltage: 3-32VDC
- Load: 24-380VAC/40A
- Dimensions: 63×45×23mm
- Spacing of mounting holes: 48mm
We recommend additional cooling.







