P6SMB6.8CA

P6SMB6.8CA is a P6SMB-series TVS diode in an SMB package used for surge protection of low-voltage DC rails (e.g., 5–12 V). The 6.8 indicates a nominal standoff voltage of about 6.8 V; it clamps transient spikes at a higher voltage (typical clamp around 10–12 V, depending on current). The device is rated for roughly 600 W peak pulse power (10/1000 µs). The suffix CA denotes a specific variant (polarity/grade such as automotive or packaging) per manufacturer; exact unidirectional vs bidirectional behavior and clamp specs should be confirmed in the datasheet. Typical applications include protecting power inputs, USB/data lines, and other sensitive electronics from transient surges. If you’d like, I can fetch the exact datasheet and pinout for this part.

Equivalent parts are other 600 W TVS diodes in SMB/DO-214AB with 6.8 V standoff. Examples:
- Onsemi SM6T6.8CA/SM6T6.8A
- STMicroelectronics SM6T6.8CA/CA
- Littelfuse P6SMB6.8CA (same family)
Suffixes (A/CA) vary by vendor, so use cross-reference tables from the manufacturer to pick the exact variant.

P6SMB6.8CA features (typical for this TVS diode family):
- 6.8 V stand-off (Vwm) for protection of 6–7 V rails
- SMB package (DO-214AA)
- 600 W peak pulse power (10/1000 μs)
- Fast response to transient events
- Low leakage in normal operation
- Suitable for protecting power rails, data lines, CAN/USB, telecom interfaces
- RoHS compliant and reflow-compatible
- Variant options (CA suffix) indicate the specific unidirectional/bidirectional form; verify exact variant in the datasheet
- Wide operating temperature range suitable for many applications
Note: confirm the exact variant (unidirectional vs. bidirectional) and clamp characteristics from the specific datasheet for P6SMB6.8CA.

- Pin count: 2 terminals (two-lead SMB package).
- Function: Transient Voltage Suppressor (TVS) diode for surge/ESD protection, designed to clamp around a 6.8 V rail or line (unidirectional variant). The device is placed across the line and ground to protect circuitry from overvoltage.

Manufacturer: ProTek Devices.
What kind of company: ProTek Devices is a semiconductor company that designs and manufactures protection components, primarily transient voltage suppressor (TVS) diodes, ESD protection devices, and surge protection solutions for electronics.

SMB package (DO-214AA) surface-mount.