P6SMB39AT3G

P6SMB39AT3G is a transient voltage suppressor (TVS) diode from the P6SMB family. It’s designed to clamp voltage spikes on high-energy lines and protect downstream circuitry.
- Package: SMB (DO-214AB) — surface-mount, high-energy handling.
- Rating: ~39 V standoff/working voltage; intended for surge protection on power rails or I/O lines.
- Power handling: typical peak pulse power around 600 W (8/20 µs waveform); exact numbers depend on version.
- Configuration: variant-specific (unidirectional vs. bidirectional) and packaging/temperature/lead-free details are indicated by the suffix; check the datasheet for the precise electrical parameters.
- Applications: automotive, telecom, consumer electronics, any system requiring fast transient protection.
Note: The “AT3G” suffix is a manufacturer-specific code for packaging/grade; refer to the vendor’s datasheet for exact specs and directionality of this exact part.

Equivalent parts (39 V, 600 W SMB, unidirectional TVS):
- Vishay SMBJ39A
- ON Semiconductor SMBJ39A
- Littelfuse P6SMB39A (same family)
- ProTek Devices SMBJ39A

P6SMB39AT3G features (highlights):
- Unidirectional transient voltage suppressor (TVS) diode
- SMB (DO-214AB) surface-mount package
- Stand-off (working) voltage: 39 V
- Peak pulse power: 600 W (10/1000 µs)
- Low clamping voltage for effective surge protection
- Wide operating temperature range: -55°C to +125°C
- RoHS compliant, lead-free
- Compact protection for power rails and signal/data lines (USB, telecom, automotive, etc.)
- Suitable for automated assembly and PCB protection
Note: Always verify electrical specifics (VBR, capacitance, exact rating) in the manufacturer datasheet for your exact application.

Pin count: 2 (anode and cathode).
Function: Unidirectional TVS diode (transient-voltage suppressor) in SMB package for surge protection, with about 39 V stand-off and ~600 W peak-pulse power rating.

- Manufacturer: ProTek Devices.
- What kind of company: A specialty semiconductor company that designs and manufactures protection components, including transient voltage suppressor (TVS) diodes and ESD/surge protection devices for electronics (automotive, consumer, industrial).

P6SMB39AT3G is a TVS diode for transient suppression. Typical application areas:
- Automotive and industrial 24V systems
- Telecom and networking equipment power rails
- DC-DC converters, power supplies, and battery-management systems
- Solar/energy-storage and charging circuits
- Data/signal interfaces and harnesses exposed to surges/ESD
It protects lines with a working voltage up to about 39 V from surges and transient events.

SMB package (DO-214AA) - surface-mount transient-voltage-suppressor diode.