40 Amp Stud Blocking Diode
40 Amp 600 Volt Stud Blocking Diode
These are a must for solar panels or wind turbines that do not have diodes like DIY solar panels, or DC wind turbines, or hydroelectric generators.
Please note that it is necessary to mount this diode in an aluminum heat sink to keep it cool, otherwise it will burn out. We do not include the heat sink, however, you may easily make your own using any thin aluminum.
Specifications:
- Rated Voltage: 600V
- Current: 40A
- Style: Stud mounted
- 1/4-20 stud thread
- Includes nut & washer
- Dimensions: 19 x 34 mm
- Weight: 18 grams
What size diode do I need?
Your diode needs to be somewhat larger than the current that it will be handling. For solar panels, we sell the 3 amp and 10 amp diodes for this purpose. If your solar panel will not exceed 2 1/2 amps of current, then the 3 amp version is fine. The 10 amp diode is acceptable for panels up to about 9 1/2 amps. Solar panels with more charge current than this would require a larger diode (see our 75 amp diode). This larger diode can be placed in-line with the common positive wire coming from your solar panels to your charge controller to handle multiple panels at one time.
Please note: A larger diode may require a heatsink if it will be used for higher power applications (above 15 amps or so).
Do I need a diode for my wind turbine?
You will only need a blocking diode if your motor has brushes (some electric motors like the Ametek have brushes). The Missouri Wind and Solar PMGs are brushless and do not require a diode.
- If the turbine has brushes then yes, you need a diode.
- If it is DC motor, then yes you need a diode.
- If it is single phase AC you need a single phase bridge rectifier.
- If it is 3 phase AC then you need a 3 phase bridge rectifier (like a car alternator), if it is not already included.
Check with your turbine supplier for more info.
Do I need a diode for use with my solar panel?
Solar panels require a diode to prevent current flow back into the battery when there is little or no light. For solar panels, a 3 amp or 8 amp diode can be used for this purpose. You might also want to install a bypass diode to prevent a shaded panel from drawing down other panels. These same diodes can be used. Place diodes in a ABS project box. If you are using a solid state charge controller, you may not need a blocking diode.
