Protective Component products

2 Electrode Gas Discharge Tubes

A two-electrode tube protects one line to ground. The two ends are symmetric, so there is no polarity to observe. Select a DC breakdown above the line working voltage, then keep the path to ground short and wide so stray inductance does not add overshoot.

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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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2 Electrode Gas Discharge Tubes product selection results
Part number	Datasheet	Compare	Downloads	Pins	Vbr(DC.V)	Spark-over Voltage/V	Cj/pf	Package	Operating Temperature
WHGD400V1P0B	SPEC	Compare WHGD400V1P0B	PDF	2 PIN	400	900	1	3.2mm*2.7mm	-40 °C to 85 °C
WHGD200V1P0B	SPEC	Compare WHGD200V1P0B	PDF	2 PIN	200	650	1	3.2mm*2.7mm	-40 °C to 85 °C
WHGD090V1P0B	SPEC	Compare WHGD090V1P0B	PDF	2 PIN	90	600	1	3.2mm*2.7mm	-40 °C to 85 °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.

Part number

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

WHGD400V1P0B2 PIN

Datasheet ↓

WHGD200V1P0B2 PIN

Datasheet ↓

WHGD090V1P0B2 PIN

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

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

How is a 2 electrode GDT connected?

One end goes to the line being protected and the other to ground. The two ends are electrically symmetric, so there is no polarity to observe. Keep the path to ground as short and as wide as the layout allows, because stray inductance in that path adds voltage overshoot on a fast surge.

How many do I need for a multi-line port?

One two-electrode tube per line, each referenced to ground. If the lines form a balanced pair and you need them to fire together so the voltage between them stays small, compare a three-electrode part instead, which shares one ground electrode across both lines.

How do I pick the DC breakdown voltage?

Choose comfortably above the highest voltage the line reaches in normal service, including ripple, so the tube never fires during operation. Then confirm the impulse breakdown, which is considerably higher, does not exceed what the downstream circuit can withstand.

Will a 2 electrode GDT load my signal?

Barely. Capacitance is typically around one picofarad, far below a semiconductor clamp of comparable energy handling, which is why GDTs suit capacitance-sensitive lines. The tube is slow and its arc voltage is not zero, so a high-speed port still needs a faster second stage behind it.

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, working voltage and the surge standard you must meet, and a sales engineer will confirm candidates first.

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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Pin count, pitch and spacing between pin rows
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When you need candidates and a comparison of differences

Engineering review identifies candidate parts and explains the differences.

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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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