TVS BI
Bidirectional breakdown diode
A bidirectional breakdown diode provides a documented voltage-limiting semiconductor path in both polarities.
Schematic
Symbols · TVS
Unidirectional TVS diode
A transient-suppression diode intended to clamp a documented surge polarity across a protected circuit.
Schematic · TVS
What it represents
A transient-suppression diode intended to clamp a documented surge polarity across a protected circuit.
On a schematic, identify cathode orientation and the protected supply/signal node and trace the transient diversion path and return conductor. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.
A TVS clamping rating is not the normal working voltage; unidirectional and bidirectional devices have different polarity behaviour.
Terminal letters describe electrical roles, not package pin numbers. Check the selected public datasheet for the actual pin assignment, polarity and any internally connected terminals before completing the drawing.
How to read it
- Identify cathode orientation and the protected supply/signal node.
- Trace the transient diversion path and return conductor.
Information to show or reference
- Label cathode orientation and the protected supply/signal node.
- Cross-reference the transient diversion path and return conductor.
- Add the selected device or circuit documentation revision, power/reference connections and project signal convention.
A distinction that matters
A TVS clamping rating is not the normal working voltage; unidirectional and bidirectional devices have different polarity behaviour.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
ESD protection and TVS device families
Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored.
About this graphic
This illustration was authored independently by Elora Grid to explain the concept. It is not reproduced from a customer drawing, an official standard graphic or a manufacturer CAD file. Its correspondence to an exact IEC or IEEE symbol identifier has not been certified.
SVG and DXF downloads contain this original artwork. DXF uses unscaled drawing units; a GA envelope supplies no product dimensions, clearances or fabrication information. Original artwork is available under CC BY 4.0. Third-party references retain their own terms.
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