ZD
Zener diode
A Zener diode is a semiconductor component intended for a documented reverse-breakdown operating function.
Schematic
Symbols · VREF-H
Shunt voltage reference
Establishes a reference voltage using a shunt-current path and the documented bias or feedback circuit.
Schematic · VREF-H
What it represents
Establishes a reference voltage using a shunt-current path and the documented bias or feedback circuit.
On a schematic, identify the shunt terminals, bias-current source and adjustment network and trace the reference node and return conductor. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.
A shunt reference requires its bias arrangement; its terminals cannot be substituted directly for a three-terminal series reference.
The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing.
How to read it
- Identify the shunt terminals, bias-current source and adjustment network.
- Trace the reference node and return conductor.
Information to show or reference
- Label the shunt terminals, bias-current source and adjustment network.
- Cross-reference the reference node and return conductor.
- Add the selected device or circuit documentation revision, power/reference connections and project signal convention.
A distinction that matters
A shunt reference requires its bias arrangement; its terminals cannot be substituted directly for a three-terminal series reference.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
TL431 — programmable shunt references
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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