Protective Component products

ESD Protection Diodes

ESD devices clamp fast static discharge while adding as little capacitance as possible, which is what a USB, Ethernet or HDMI port needs. Place them close to the connector with a short path to ground, then verify the eye diagram on the real link.

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Part number search & selector

Find ESD Protection Diodes part numbers

The table uses the current English-site product records, published selection fields and part-specific technical-file links.

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Sample

ESD Protection Diodes product selection results
Part number	Datasheet	Compare	Downloads	Polarity	Vrwm/V	Vesd Air/Vesd Contact	Cj/pf	Package	Operating Temperature
WHALD03G4U	SPEC	Compare WHALD03G4U	PDF	ESD	3.3	±15KV/±12KV	0.3	DFN2510-10L	-40 °C to 125 °C
WHTA5V01P2C	SPEC	Compare WHTA5V01P2C	PDF	ESD	5	±20KV/±20KV	1.2	SOT-363	-40 °C to 125 °C
WHTA3V30P8B	SPEC	Compare WHTA3V30P8B	PDF	ESD	3.3	±30KV/±30KV	0.8	SOD323	-40 °C to 125 °C

By polarity

Unidirectional and bidirectional devices

Polarity follows the signal: unidirectional for DC rails, bidirectional for AC and differential lines.

01Uni-Directional TVS0 part numbers 02Bi-Directional TVS1 part numbers 03ESD3 part numbers 04Bi-Directional ESD1 part numbers

How to select

Selection guide for TVS Diodes and ESD Protection Devices

Selection steps, parameter explanations and the series comparison for TVS Diodes and ESD Protection Devices are on one page. Confirm the series there, then use this list for part numbers, files and samples.

Open the TVS Diodes and ESD Protection Devices selection guide →

Documents

TVS and ESD datasheets

Datasheets carry the clamping curve, pulse waveform conditions and capacitance.

Part number

Showing representative available file sets. Search to find a specific SKU.

WHALD03G4UESD

Datasheet ↓

WHTA5V01P2CESD

Datasheet ↓

WHTA3V30P8BESD

Datasheet ↓

3: PDF datasheets listed
0: 3D file sets listed
0: PCB footprints listed

VOOHU’s published product content is reviewed by its engineering team. Specifications, downloads and technical support information are tied to specific part numbers, so you can verify them before requesting samples or a quotation.

FAQ

TVS and ESD questions engineers ask

Answers cover TVS against ESD, polarity choice, capacitance and placement.

Guide 01Selecting a TVS or ESD device in four steps Guide 02Where TVS and ESD devices are fitted Guide 03TVS and ESD datasheets

How does an ESD protection diode work?

It sits in parallel between the signal line and ground. In normal operation it is high impedance and draws almost nothing. When a static discharge arrives it conducts rapidly, diverting the energy to ground and holding the voltage within what the downstream chip survives. Response speed and residual voltage decide how well it protects.

Why does low capacitance matter?

The device is a parallel load on the signal line. High speed interfaces are sensitive to capacitive loading: it attenuates high frequency content, degrades the eye and raises return loss. Low capacitance parts exist specifically so protection can be fitted without costing link margin.

Where should it be placed?

As close to the connector or the point of entry as possible, with the path to ground as short and wide as the layout allows. Stray inductance in that path adds voltage overshoot during a fast discharge. The signal must not reach the protected chip before it reaches the device.

How do I choose the standoff voltage?

Above the highest voltage the signal line reaches in normal operation, including any common mode offset. Too low and the device leaks or triggers during normal communication. Too high and the clamping voltage rises, which reduces how well the downstream chip is protected.

How do I request samples or a quote?

With a complete part number, send the part number, quantity, delivery region and the date you need it. If you are still selecting, send the interface type, the data rate, the working voltage and the discharge level you must withstand.

Engineer support

Continue after product selection

Send the candidate part number and the condition you need reviewed. Sample support can be added after the selection is clear; commercial questions may be discussed in the same engineering conversation.

1Selected part numbers
2Engineering review
3Sample request
4Commercial discussion

For a replacement review

Original part and datasheet
Include the document revision
Operating conditions
Temperature, isolation voltage and PoE current basis
Package constraints
Pin count, pitch and spacing between pin rows
Project stage and annual volume
To help prioritize samples and evaluation
Target review date
When you need candidates and a comparison of differences

Engineering review identifies candidate parts and explains the differences.

For samples and a quotation

Candidate part numbers
From the selector or engineering review
Quantity and project stage
Prototyping / pilot build / production
Required delivery date
Specify sample and production timing separately
Required documentation
Compliance documents, material declarations or third-party reports

Samples are free of charge. Sample quantity and lead time depend on the part number and project stage. Sales will respond on business days.

Published replacement reviews Push-Pull Transformer Selection Comparison: VOOHU WHST06Q02E0 vs. Würth Elektronik 750316819 2026-08-31 View all alternatives

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