![3v3 Sustain for Raspberry Pi 4 3v3 Sustain for Raspberry Pi 4](https://cdn11.bigcommerce.com/s-2fbyfnm8ev/images/stencil/500x659/products/1497/5228/3v3sustain__17835.1637425264.1280.1280__34201.1637425499.jpg?c=2)
![](https://www.pishop.us/product_images/uploaded_images/approved-reseller-logo-rpf1.png)
Pi4, ClusterHAT, FanSHIM, etc. NOT included.
Keep the 3.3v rail alive between reboots.
When rebooting a Raspberry Pi 4 the 3.3 volt rail is reset which causes problems for some HATs.
3v3 Sustain fits in between a Raspberry Pi and a HAT/pHAT and provides a stable 3.3 volts (300 mA max) during reboots.
It also has a cutout to help keep the Pi 4 cooler (can be used with the Pimoroni FanSHIM etc.).
Included
- Pre-soldered 3v3 Sustain PCB
- 4x 12mm M2.5 spacers
- 8x 6mm M2.5 screws