Protective Component products

3 Electrode Gas Discharge Tubes

A shared centre electrode ties two protected lines to one ground, so when one side fires the other follows almost immediately. That keeps the residual voltage between the pair small, which is what balanced lines need. Confirm the pinout from the datasheet before layout.

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

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3 Electrode Gas Discharge Tubes product selection results
Image	Part number	Datasheet	Compare	Downloads	Pins	Vbr(DC.V)	Spark-over Voltage/V	Cj/pf	Package	Operating Temperature	Sample
	WHGT090V1P0A	SPEC	Compare WHGT090V1P0A	PDF	3 PIN	90	600	1	5.0mm*7.6mm	-40 °C to 125 °C

By electrode count

Two and three electrode gas discharge tubes

Electrode count decides how many lines one part protects and whether they fire together.

012 PIN3 part numbers 023 PIN1 part numbers

How to select

Selection guide for Gas Discharge Tubes (GDT)

Selection steps, parameter explanations and the series comparison for Gas Discharge Tubes (GDT) are on one page. Confirm the series there, then use this list for part numbers, files and samples.

Open the Gas Discharge Tubes (GDT) selection guide →

Documents

GDT datasheets and drawings

Datasheets carry the tested breakdown window, surge rating and creepage requirements.

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

WHGT090V1P0A3 PIN

Datasheet ↓

1: 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

Gas discharge tube questions engineers ask

Answers cover how a GDT works, where it sits in a protection chain and its limits.

Guide 01Selecting a gas discharge tube in four steps Guide 02Where gas discharge tubes are fitted Guide 03GDT datasheets and drawings

What does the third electrode achieve?

It gives both protected lines one common ground reference inside a single envelope. When one side breaks down, the ionised gas helps the other side fire almost immediately. The two lines therefore reach ground together, and the residual voltage between them stays small, which is what a balanced pair needs.

How is a 3 electrode GDT connected?

The centre electrode is normally the common ground and the two outer electrodes take the two protected lines. Confirm which pin is which from the datasheet for your specific part, rather than inferring it from the package, and keep the ground path short and wide.

What if the two lines have different working voltages?

A three-electrode part has one breakdown specification covering the whole device, so it suits two lines with similar conditions. If the two lines differ substantially, use separate two-electrode tubes sized individually, or send the conditions to our engineers to assess.

Is a 3 electrode part suitable for high-speed pairs?

Capacitance is low, so the loading is acceptable, and firing both legs together helps preserve balance. The tube is still slow with a non-zero arc voltage, so a high-speed port needs a faster clamping stage behind series impedance to handle the residual.

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 line type, the working voltage of both lines and the surge standard you must meet, and a sales engineer will confirm candidates.

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.

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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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