Pi 4 B Rev 1.2 Components¶
Top¶

| ID | Official Label | Type | Package | Value | Replacement(s) | Source(s) | Notes | |
|---|---|---|---|---|---|---|---|---|
| 48 | Resistor (Series) | 33–34Ω | Self-Measured | SD card CLK series resistor. Upper-left of SOC. Left pad measures ~0.8Ω to SD card slot CLK pin; right pad measures ~34Ω across component. | ||||
| 50 | IC Power Switch P-Channel 2:1 | 6-WLCSP | DigiKey | Raspberry Pi Forum | onsemi FPF1320UCX. Sits beneath the 10Ω 0201 resistor (ID 51). | |||
| 51 | Resistor | 0201 | 10Ω | Raspberry Pi Forum | Sits above the CSP power switch (ID 50). Board reportedly boots with this resistor bridged. |
Bottom¶

| ID | Official Label | Type | Package | Value | Replacement(s) | Source(s) | Notes |
|---|---|---|---|---|---|---|---|
| 1 | DigiKey | Raspberry Pi Forum | SD Card Slot | ||||
| 29 | Mosfet | SOT-523 | DigiKey | Raspberry Pi Forum | DMG1012T |