SMD Varistor Roll 0603–2220 | 8V to 47V Voltage Protection
SMD Varistor Roll 0603–2220 | 8V to 47V Voltage Protection
SMD Varistors – Full Reel | Multiple Sizes & Voltage Ratings
Protect your electronic circuits with precision. These surface-mount SMD varistors are supplied on a convenient tape-and-reel format, making them ideal for PCB assembly, automated pick-and-place machines, and prototype builds alike. Available in a wide range of standard case sizes and clamping voltages, you get exactly the component you need to guard sensitive electronics against voltage transients and electrostatic discharge (ESD).
Available Case Sizes
- 0603
- 0805
- 1206
- 1210
- 1812
- 2220
Available Voltage Ratings
- 8V, 12V, 16V, 18V, 22V, 24V, 26V, 30V, 33V, 39V, 47V
Key Features
- Tape & Reel Packaging: Supplied on a full reel for easy, consistent component feeding in SMT production lines.
- Wide Size Selection: Six standard EIA case sizes to suit virtually any PCB layout requirement.
- Broad Voltage Range: From 8V to 47V clamping voltage options for flexible circuit protection designs.
- ESD & Transient Protection: Clamps voltage spikes quickly to shield downstream components from damage.
- Compact Surface-Mount Design: Low-profile SMD form factor saves board space and simplifies assembly.
- Compatible with Automated Assembly: Reel format is optimised for pick-and-place machines, reducing manual handling.
Ideal Applications
- Consumer electronics PCB protection
- Power supply input filtering
- Data line and I/O port ESD clamping
- Automotive electronics (signal lines)
- Industrial control boards
- DIY electronics and prototyping
Product Specifications
| Attribute | Details |
|---|---|
| Component Type | SMD Varistor (MLV) |
| Case Sizes | 0603, 0805, 1206, 1210, 1812, 2220 |
| Voltage Ratings | 8V, 12V, 16V, 18V, 22V, 24V, 26V, 30V, 33V, 39V, 47V |
| Packaging | 1 Roll (Tape & Reel) |
| Mount Type | Surface Mount (SMD/SMT) |
| Origin | Made in China |
Looking for other electronics tools and accessories? Check out our Electromagnetic Induction Tester – Coil & Circuit Fault Detector or our Air Compressor Pressure Gauge | DIY Tool for your workbench setup.
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Frequently Asked Questions
Q: What is an SMD varistor and what does it do in a circuit?
A: An SMD varistor (also known as a multilayer varistor or MLV) is a voltage-dependent resistor in a compact surface-mount package. It acts as a voltage clamp — remaining high-resistance under normal conditions and rapidly conducting excess current when a voltage spike or ESD event occurs, diverting that energy away from sensitive downstream components and protecting your circuit.
Q: How do I choose the right voltage rating for my application?
A: Select a clamping voltage rating that is above the normal operating voltage of the line you wish to protect but low enough to clamp damaging spikes effectively. For example, for a 5V logic line, an 8V or 12V rated SMD varistor is typically appropriate. Always consult your circuit's datasheet and design specifications to confirm the best choice.
Q: Are these SMD varistors suitable for automated PCB assembly?
A: Yes. These varistors are supplied in standard tape-and-reel format, which is fully compatible with automated SMT pick-and-place machines. The consistent reel packaging ensures reliable component feeding and reduces the risk of misalignment during high-volume PCB assembly.
Q: Which case size should I select for my PCB?
A: The case size (0603, 0805, 1206, 1210, 1812, or 2220) refers to the physical dimensions of the component in imperial units. Smaller sizes like 0603 and 0805 are ideal for space-constrained boards, while larger sizes like 1812 and 2220 typically offer higher energy absorption capacity. Match the footprint on your PCB layout to the appropriate case size when ordering.