SMAJ5.0A-TR 5V Unidirectional TVS Diode (400W, SMA/DO-214AC)

Build an impenetrable wall of defense for your 5V power rails with the SMAJ5.0A-TR Transient Voltage Suppressor (TVS) diode. When designing custom robotics, 3D printer motherboards, or drone Power Distribution Boards (PDBs), sudden voltage spikes from spinning motors, plugging in batteries, or failing voltage regulators can instantly incinerate 5V microcontrollers and sensors. This heavy-duty unidirectional diode sits parallel to your power supply, remaining completely invisible during normal operation. But the millisecond a dangerous voltage spike occurs, it instantly activates, clamping the voltage safely and shunting the destructive energy to ground.

Unlike standard ESD protection chips meant for delicate data lines, the SMAJ series is built for raw power. It is capable of absorbing a massive 400 Watts of peak pulse power, making it the perfect safeguard against severe inductive load kickbacks (like those from relays or heavy DC motors). Housed in the industry-standard SMA (DO-214AC) surface-mount package, it is extremely easy to solder by hand and is an absolute mandatory safety component for protecting expensive 5V logic circuits (Arduino, Raspberry Pi, flight controllers) from catastrophic overvoltage failure.

Key Features:

• 5V Rail Guardian: Optimized specifically for standard 5V DC power lines, protecting delicate VCC circuits from lethal overvoltage.

• Massive 400W Surge Rating: Easily absorbs brutal inductive spikes and high-energy transients that would instantly destroy standard zener diodes.

• Unidirectional Protection: Perfectly suited for DC power supply lines, ensuring that positive voltage spikes are clamped and reverse polarity is blocked.

• Standard SMA Package: The rugged DO-214AC footprint handles high thermal loads while remaining compact enough for densely populated DIY PCBs.

Specifications:

• Part Number: SMAJ5.0A-TR

• Diode Type: Unidirectional Transient Voltage Suppressor (TVS)

• Working Voltage (Vrwm): 5.0V

• Peak Pulse Power (Pppm): 400W

• Package Type: SMA / DO-214AC (SMD/SMT)