The "4000" likely refers to a specific class or version of the USB controller (perhaps USB 3.0 capabilities), while the hardware identifier—which includes USB/VID_04E8&PID_2912 —is what Windows uses to recognize and load the correct driver.
The USB30PHY on 10nm/8nm LPP (Exynos 9820, 2100) consumes:
: For example, some users report idle temperatures of ~36°C, which can spike to 44°C or higher during gaming or even light video playback. exynos usb device4000 hot
Try a different USB cable—preferably the original Samsung cable that came with the phone. Also test the phone with a different charger. If the overheating disappears, the cable or charger is at fault. If the problem persists regardless of the cable, the issue is almost certainly inside the phone’s USB controller or battery.
If the heating persists, the cache partition may be corrupted. Turn off the phone. The "4000" likely refers to a specific class
: In a healthy device, entering EUB mode requires a purposeful hardware shortcut via test points or a specialized service cable. If your device entered this mode spontaneously and is quickly generating high heat, it indicates a severe voltage irregularity or a chip-level malfunction. Primary Causes of the Overheating and Connection Loop
Most of these causes are not catastrophic, but they do require immediate action: disconnect the cable, turn off the phone, and let it cool. In the longer term, updating your phone’s firmware, using high‑quality cables, avoiding simultaneous data and high‑current charging, and disabling fast charging can all reduce the risk of a dangerously hot USB port. Also test the phone with a different charger
Exynos SoCs support USB On‑The‑Go (OTG), which allows the phone to act as a USB host and power external devices such as USB flash drives, keyboards, or even small fans. When you connect an OTG accessory, the phone must supply 5 V power to the accessory through its own battery. That draws significant current from the battery’s power management circuit, and the phone’s USB controller must also handle all the data traffic.
Troubleshooting the "Exynos USB Device(4.0.0.0)" Overheating and BROM Loop Issue