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Gas Discharge Tubes

Gas Discharge Tubes
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Gas Discharge Tubes

Product catalog summary
Introduction
Bourns® Gas Discharge Tubes (GDTs) are crucial for safeguarding electronic equipment from transient disturbances. They function by diverting surge currents to the ground and reset to a high-impedance state once normal conditions resume. Bourns offers a range of GDTs with advancements in response time, size, and impulse life.
GDT Types
Bourns provides both 2-electrode and 3-electrode GDTs. The 2-electrode GDTs protect single lines, while 3-electrode GDTs offer dual line protection. These are available in various configurations and breakdown voltages.
Product Features
Bourns® GDTs are RoHS compliant, offer a wide voltage range (75 V to 6000 V), and feature low arc voltage and capacitance. They are tested to international standards and designed for long service life.
Switch-Grade Fail-Short Devices
These devices minimize thermal runaway risks and are available on selected models. They feature a spring-loaded mechanism for rapid activation and low contact resistance.
Applications
Bourns® GDTs are used in telecom/datacom, industrial, consumer electronics, and more, providing protection for devices like modems, antennas, and power supplies.
Operating Conditions
GDTs operate between -40 ˚C to +85 ˚C and comply with IEC standards. They are UL listed and RoHS compliant.
Quality Assurance
Manufactured in ISO 9001 certified facilities, Bourns® GDTs undergo 100% production testing and quality inspections.
Hybrid and Long Life GDTs
Hybrid GDTs integrate multiple protection technologies for enhanced performance. Long Life GDTs are designed for superior performance and longevity, available in heavy, medium, and light duty versions.
Premium GDTs
These are cost-effective solutions for products with short to medium service life requirements, available in various duty versions.
Overview
The document provides detailed specifications and advantages of various Gas Discharge Tubes (GDTs) used for surge protection in electronic circuits. It categorizes GDTs into light duty, high-current, high-voltage, and fast-acting types, each designed for specific applications and performance requirements.
Light Duty GDTs
These are miniature surface mount devices with medium service life and light duty surge ratings. They offer low capacitance and insertion loss, making them suitable for applications requiring minimal interference. They are UL Listed and RoHS compliant.
High-Current GDTs
Designed to handle large impulse discharge currents, these GDTs are used in surge protection devices with ratings of 40-100 kA. They provide high isolation resistance and long service life, suitable for heavy-duty applications.
High-Voltage GDTs
These devices are tailored for applications requiring high isolation levels, with DC breakdown voltages ranging from 800 V to 6000 V. They are compact, surface mountable, and maintain low capacitance and insertion loss.
Fast Acting GDTs
The T-Series GDTs are designed for use with Bourns® TBU® High-Speed Protectors, offering fast overvoltage protection. They are ideal for high-speed applications and provide low voltage let-through protection.
Applications
The document lists specific GDT part numbers for various applications such as CAN-bus, RS-232, RS-422, RS-485, SDI, and VDSL. It also describes an RS-485 Evaluation Board designed to enhance surge and transient protection levels.
Technical Assistance
Contact information for technical support and sales offices is provided for various regions, ensuring customers can obtain assistance and place orders efficiently.
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Catalog excerpts

Gas Discharge Tubes-1

Bourns® Gas Discharge Tubes Short Form Brochure

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Gas Discharge Tubes-2

Bourns® GDT Product Overview Introduction Customers in many different industries rely on Bourns® Gas Discharge Tubes (GDTs) to protect an ever increasing array of electronic equipment. Bourns engineers have innovated and improved GDT technology by designing devices with faster response times, low capacitance, and smaller sizes while at the same time increasing impulse life performance. Bourns offers GDTs in six unique families: Long Life, Premium, High-Voltage, High Current, Hybrid and Fast Acting. This broad offering of GDT devices addresses the diverse protection needs of next generation electronics....

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Gas Discharge Tubes-3

Bourns® GDT Product Features • RoHS compliant* • Wide range of voltages available (75 V to 6000 V) • Wide range of GDT sizes available • Patented hybrid technology designs (MSP® GDT) • Low arc (on-state) voltage • Low capacitance and insertion loss • Non-radioactive materials • Devices are tested according to U.S.A. and International standards and recommendations • Low work function designs that result in long and stable service life • Patented Switch-Grade Fail-Short devices available on some models Benefits of Partnering with Bourns for Your GDT Circuit Protection Needs • Special leadform and...

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Gas Discharge Tubes-4

Bourns® GDT Application Overview Applications by Market Telecom/Datacom Ethernet (Exposed) Ethernet (PoE) Primary Protection Modules MDF Modules Splitters Telecom CPE Telecom Line Cards ADSL Modems VDSL Modems Set-top Boxes Gateways IAD Base Station Antennas Voice Modes MDC/PCI Modems VoIP Industrial/Consumer RS-485 RS-232 Antenna Protection Railroad Protection Irrigation Systems Home Office Equipment Instrumentation TVS Protection Devices Power Supplies Solar Power Smart Grid Smart Power Security Equipment Transportation Signaling Industrial Process Controls Petro-Chemical Equipment RF Input...

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CMF-RL50A TBU-CA065-200-WH Tip TBU-CA065-200-WH o +t t RS485 Transceiver 2038-15-SM TISP4xxxM3BJ o 2036-35 o t CDSOT23-SM712 CMF-RL50A Ring TISP4xxxM3BJ o +t High-Current RS-485 Figure 8 Data Line Protection Figure 9 VCC MF-R018/250 CDSOT23-S2004 TBU-CA085-200-WH LVDS Device VCC Tip TBU-CA085-200-WH TISP4xxxM3BJ o t VCC 2031-42T-SM o +t 2036-35-SM o t Dierential Output CDSOT23-S2004 Ring MF-R018/250 2031-42T-SM TISP4xxxM3BJ o +t Figure 10 LVDS Input Port Surge Protection Solid-State Hook Switch Figure 11 TIP Isolation Barrier TISP4310T3BJ Tip Current Sink Ring Detect Ring Tx Power Feed Rx Signal...

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Gas Discharge Tubes-6

GDT General Information Quality Systems Performance by Design Bourns® GDTs are produced in ISO 9001 certified facilities. Bourns® GDT device designs are based on standard ITU-T K.12, as well as key considerations of RUS-PE80/IEEE C62.31, GR-1361, GR-974, GR-1089, ITU-T K.20/21, IEC61643-311 (EN61643-311), and DIN VDE 0845 part 2. Quality Monitoring Bourns® GDTs are 100 % production tested to ensure compliance of key product parameters. UL Listing Quality Sampling Inspections Bourns® GDTs are inspected to AQL 0.65, DIN ISO 2859 Bourns® GDT devices are recognized to UL 497B under UL file E153537....

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Gas Discharge Tubes-7

Hybrid GDTs Hybrid GDT Devices A hybrid GDT is a device that integrates two or more protection technologies into its design to provide an enhanced circuit protection solution. 2026-xx-XX-MSP Heavy Duty, 3-Electrode Multi-Stage Protector MSP® GDT Size (mm) 8 x 14 Max. Surge AC (10/350 Discharge µs) 1 Life (20 Operation operations) 5 kA 10 A Surge Life (10/1000 µs) 500 A, >1000 Operations DC Form Breakdown Packaging Factor Range (V) 230 - 330 Bulk Advantages • • • • Long service life Hybrid solid-state design Solid-state response combined with robust GDT Radial Drop-in primary protection solution...

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Gas Discharge Tubes-8

Long Life GDTs Long Life GDT Devices Long Life GDT devices are designed to meet or exceed GDT performance as specified in ITU K.12. These GDTs are available in heavy duty, medium duty and light duty versions and are targeted to customers requiring superior performance of end products over a longer service life. In addition to ITU K.12, some heavy duty long life GDT series are based on key considerations of RUS-80/IEEE 2035-xx-XX Light Duty, 2-Electrode Miniature GDT *RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.

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Gas Discharge Tubes-9

2035-xx-SM Light Duty, 2-Electrode Miniature Precision Surface Mount GDT Surge Life Bulk, Tape ■ Long and stable service life ■ Light duty AC & surge current ratings ■ Compact size ideal for board level protection ■ Low capacitance and insertion loss ■ UL Listed and RoHS compliant* 2037-xx-XX Light Duty, 2-Electrode Miniature GDT

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Gas Discharge Tubes-10

Premium GDTs Premium GDT devices are designed to meet selected performance requirements as specified in ITU K.12. These GDTs are available in heavy duty, medium duty and light duty versions and are targeted to customers that require a cost-effective protection solution for end products with short to medium service life requirements. Surge Life • Medium service life Bulk, Tape Axial . Medium duty surge rating and Reel leaded • Low capacitance and insertion loss • UL Listed and RoHS compliant*

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Gas Discharge Tubes-11

*RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.

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Gas Discharge Tubes-12

High-Current GDTs High-current GDT devices are designed to handle very large impulse discharge currents. Typically utilized in surge protection devices (SPDs), these GDTs have 8/20 (is impulse current ratings of 40-100 kA. *RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.

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Gas Discharge Tubes-13

High-Voltage GDTs High-voltage GDT devices are designed specifically for those customers and applications requiring a high level of isolation. This family of GDT is available with DC breakdown voltages ranging from 800 V to 6000 V. Tape and Reel Surface mount High-voltage DC breakdown voltages up to 2 kV Mini surface mount device Low capacitance and insertion loss UL Listed and RoHS compliant*

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