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Littelfuse AC120 Gas Discharge Tube

The AC120 series Gas Discharge Tube (GDT) provides reliable surge protection for AC line applications. Designed for 120VAC lines, these GDTs can extinguish follow-on currents of at least 200A, ensuring safety in power supplies, long and short branch circuits, and electronic equipment. The robust ceramic-metal construction offers low capacitance (<1.5 pF), high voltage isolation, and durability for demanding environments, making them ideal for surge protection in power grids, sensitive electronics, and communication systems.

Authorized Distributors
Source:DigiKey
Part No:AC120
Stock:1
Inv Date:05-28-2026
Price: Unit price: $63.99
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Source:DigiKey
Part No:AC120
Stock:219
Inv Date:05-28-2026
Price: Unit price: $3.44
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Part No:AC120
Stock:0
Inv Date:05-29-2026
Price: Unit price: $65.9
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Part No:AC120
Stock:11
Inv Date:05-29-2026
Price: Unit price: $4.27
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Part No:AC120
Stock:0
Inv Date:05-28-2026
Price: Unit price: $65.9
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Part No:AC120
Stock:0
Inv Date:05-28-2026
Price: Unit price: $3.22
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Part No:AC120
Stock:4
Inv Date:05-28-2026
Price: Unit price: $74.39
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Part No:AC120
Stock:4
Inv Date:05-28-2026
Price: Unit price: $74.39
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Part No:AC120
Stock:0
Inv Date:05-28-2026
Price: Unit price: $1.63
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Authorized Distributors
Part No:AC120
Stock:1
Inv Date:05-11-2026
Price: N/A
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Littelfuse AC120 Gas Discharge Tube Specifications:

  • AC line voltage: 120VAC
  • Max follow-on current: 200A
  • Capacitance: <1.5 pF
  • Construction: Ceramic-metal
  • Peak Voltage: ~140 Volts
  • Operating temperature: -40°C to +90°C
  • Glow transition current: <1.0 A
  • Glow voltage: ~140 Volts
  • Soldering: Reflow and wave soldering parameters specified, with peak temperature of 260°C
  • Package options: Tape and reel, bulk pack
  • Certification: UL certified (pending UL approval for some models)

Buy the Buy Littelfuse AC120 Gas Discharge Tube Part Number AC120 Online

Secure your electronic systems with Littelfuse Gas Discharge Tubes, designed for 120VAC surge protection. Easy to install, durable ceramic-metal construction, and capable of handling 200A follow-on currents, these GDTs ensure safety and longevity for power supplies, communication devices, and sensitive electronics. Available in tape-and-reel and bulk packages, they meet industry standards and offer excellent low-capacitance characteristics. Invest in reliable surge suppression technology to protect your critical equipment efficiently with Littelfuse GDTs.

Get Littelfuse AC120 GDT today—built for reliable surge protection and long-lasting durability in AC line applications.

Frequently Asked Questions

Where can I buy Littelfuse AC120?

You can click on the BUY or RFQ button to purchase AC120 from an authorized Littelfuse distributor.

How do I troubleshoot issues or seek technical support for part AC120?

You can download the AC120 datasheet or visit the Littelfuse website for support.

Who is the manufacturer of AC120?

Littelfuse

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