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Bourns® Gas Discharge Tubes Short Form Brochure 2 GDT Operation GDT devices are designed to prevent damage from transient disturbances by acting as a “crowbar”, virtually a short circuit. When an electrical surge exceeds the GDT’s defined sparkover voltage, the GDT becomes ionized and conduction takes place within a fraction of a microsecond diverting surge current to ground. When the surge event subsides and the system voltage returns to normal levels, the GDT will reset to its high-impedance (off) state. The crowbar effect of the GDT effectively limits the overvoltage to a low level and shunts the associated surge current away from downstream components and circuitry. GDT Types Bourns offers a broad range of 2-electrode and 3-electrode GDT devices. 2-electrode GDTs are single chamber devices designed to provide protection to single lines referenced to another line or ground. 3-electrode GDTs provide dual line protection from either line to ground or line to line (L1-G; L2-G or L-L). Bourns® GDTs are available in a variety of DC breakdown voltages, current ratings, sizes and mechanical configurations. 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. Bourns® GDT Product Overview Sparkover Voltage Glow Region Glow to Arc Transition Arc Voltage Vo lta ge Time Figure 1 Figure 2 Figure 3 GDT Voltage Breakdown Characteristic 2-Electrode GDT 3-Electrode GDT 2 1 3 2 1 3 Benefits of Partnering with Bourns for Your GDT Circuit Protection Needs • Special leadform and voltage screening capabilities • Performance and reliability backed up by 50+ years of designing and manufacturing GDTs • Technical design support • Technical committee participation and leadership • Bourns lab facilities available for design verification of customer circuits as well as with testing capabilities for UL and Telcordia • Bourns offers multiple circuit protection components for total design support including Thyristors, Diodes, Multifuse® ppt 关于艾滋病ppt课件精益管理ppt下载地图下载ppt可编辑假如ppt教学课件下载triz基础知识ppt Cs, CPTCs, TBU® High-Speed Protectors, Telefuse™ Telecom Protectors, MOVs and Inductors. 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 Switch-Grade Fail-Short Devices Reduce the risk of thermal runaway with our Switch-Grade Fail-Short device available on selected Bourns® GDTs. • The fail-short contacts are spring-loaded switch-grade electrical conductors with no insulating burn through media or solder pellets under compression. • The fail-short mechanism is activated by a breakaway action, preventing solder residues from freezing the fail-short mechanism and diurnal temperature failures. • Superior thermal coupling between the Switch-Grade Fail-Short device and suppression components allows rapid Fail-Short activation in both vented and non- vented GDTs, with one of the industry’s lowest contact resistance. • Available on Model 2026, 2036 and 2026 MSP® GDTs. *RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011. 4 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 Applications by Market Bourns® GDT Application Overview Satellite Receiver RF Input AC Input Surge Protection VDSL Driver Side Protection VDSL Over Pots Figure 4 Figure 5 Figure 6 Figure 7 RF Input DC Supply SMLJ20A 2035-09-SM CD143A-SR70 TISP4P015L1NR 2038-110-SM VDSL Driver B1250T B1250T 2020-42T-C4LF TBU-CA085-500-WH TBU-PL085-200-WH Filter SLIC VDSL 2035-35-SM MOV20-431K L N 5 High-Current RS-485 Data Line Protection Modem Protection XDSL Modem Protection LVDS Input Port Surge Protection VOICE Protection Module Figure 8 Figure 9 Figure 12 Figure 13 Figure 10 Figure 11 Differential Output LVDS Device VCC VCC VCC TBU-CA085-200-WH TBU-CA085-200-WH CDSOT23-S2004 CDSOT23-S2004 2031-42T-SM 2031-42T-SM TISP4310T3BJ 2035-60-SM Tip Ring Current Sink Ring Detect Modem DAA Rx Signal Tx Signal Power Feed Isolation Barrier Solid-State Hook Switch TISP4xxxM3BJ 2036-35-SM Tip Ring t o t o +t o +t o MF-R018/250 TISP4xxxM3BJ MF-R018/250 TIP RING 2035-42-SM xDSL Transceiver Tx Rx TISP4xxxM3BJ 2036-35 Tip Ring t o t o +t o +t o CMF-RL50A CMF-RL50A TISP4xxxM3BJ 2038-15-SM RS485 Transceiver TBU-CA065-200-WH CDSOT23-SM712 TBU-CA065-200-WH 6 GDT General Information Operating and Storage Conditions Bourns® GDT devices comply with the general operating and storage conditions as detailed in revelent IEC standards, or ITU K.12 unless otherwise specified in the product series data sheets. Operating temperature range: -40 ˚C to +85 ˚C. GDTs are assigned climatic category 40/90/21 in accordance with IEC 60068-1. UL Listing Bourns® GDT devices are recognized to UL 497B under UL file E153537. Regulated Substances Bourns® GDTs with an “LF” designator are RoHS compliant as defined in the Annex to 2002/95/EC. By definition, Bourns® GDTs and Switch-Grade Fail- Short option with an “LF” suffix are below maximum concentration values (no exemptions used) for: • Lead • Cadmium • Hexavalent Chromium • Mercury and Mercury Compounds • PBBs and PBDEs Performance by Design 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 Systems Bourns® GDTs are produced in ISO 9001 certified facilities. Quality Monitoring Bourns® GDTs are 100 % production tested to ensure compliance of key product parameters. Quality Sampling Inspections Bourns® GDTs are inspected to AQL 0.65, DIN ISO 2859 specifications. 7 Hybrid GDTs 2026-xx-XX-MSP Heavy Duty, 3-Electrode Multi-Stage Protector MSP® GDT Size (mm) Max. Surge (10/350 µs) 1 Operation AC Discharge Life (20 operations) Surge Life (10/1000 µs) DC Breakdown Range (V) Packaging Form Factor Advantages 8 x 14 5 kA 10 A 500 A, >1000 Operations 230 - 330 Bulk Radial leaded • Long service life • Hybrid solid-state design • Solid-state response combined with robust GDT • Drop-in primary protection solution for all paired communications lines • GR-974 tested • UL Listed 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. 8 2027-xx-XX Heavy Duty, 2-Electrode GDT Size (mm) Max. Surge (8/20 µs) 1 operation AC Discharge Life (10 operations) Surge Life (10/1000 µs) DC Breakdown Range (V) Capacitance (pF) Packaging Form Factor Advantages 8 x 6 25 kA 10 A 500 A, >400 Operations 75 - 600 <1 Bulk, Tape & Reel Core, Axial leaded • Long and stable service life • Heavy duty AC & surge current ratings • Precision ±15 % tolerance on 150-600 V devices • Low capacitance and insertion loss • Custom leadforms available • UL Listed and RoHS compliant* 2027-xx-SM Heavy Duty, 2-Electrode Surface Mount GDT Size (mm) Max. Surge (8/20 µs) 1 operation AC Discharge Life (10 operations) Surge Life (10/1000 µs) DC Breakdown Range (V) Capacitance (pF) Packaging Form Factor Advantages 8 x 6 25 kA 10 A 500 A, >400 Operations 75 - 600 <1 Bulk, Tape & Reel Surface mount • Long and stable service life • Heavy duty AC & surge current ratings • Precision ±15 % tolerance on 150-600 V devices • Low capacitance and insertion loss • UL Listed and RoHS compliant* Long Life GDTs 2026-xx-XX Heavy Duty, 3-Electrode Balanced TRIGARD® GDT Size (mm) Max. Surge (8/20 µs) 1 operation AC Discharge Life (10 operations) Surge Life (10/1000 µs) DC Breakdown Range (V) Capacitance (pF) Packaging Form Factor Advantages 8 x 11 40 kA 20 A 1000 A, >400 Operations 75 - 600 <2 Bulk Core, Radial leaded • Long and stable service life • Balanced Trigard® design • Heavy duty AC & surge current ratings • Switch-Grade Fail-Short available • Low capacitance • UL Listed and RoHS compliant* 2035-xx-XX Light Duty, 2-Electrode Miniature GDT Size (mm) Max. Surge (8/20 µs) 1 operation AC Discharge Life (10 operations) Surge Life (10/1000 µs) DC Breakdown Range (V) Capacitance (pF) Packaging Form Factor Advantages 5 x 5.4 10 kA 5 A 100 A, >300 Operations 90 - 600 <1 Bulk, Tape & Reel Core, Axial leaded • Long and stable service life • Light duty AC & surge current ratings • Compact size ideal for board level protetion • Low capacitance and insertion loss • UL Listed and RoHS compliant* *RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011. 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 465.1, GR-1361/GR-974/1089 as well as ITU K.20/21. 9 2035-xx-SM Light Duty, 2-Electrode Miniature Precision Surface Mount GDT Size (mm) Max. Surge (8/20 µs) 1 operation AC Discharge Life (10 operations) Surge Life (10/1000 µs) DC Breakdown Range (V) Capacitance (pF) Packaging Form Factor Advantages 4.4 x 5 10 kA 5 A 100 A, >300 Operations 90 - 600 <1 Bulk, Tape and Reel Surface mount • 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 Size (mm) Max. Surge (8/20 µs) 1 operation AC Discharge Life (10 operations) Surge Life (10/1000 µs) DC Breakdown Range (V) Capacitance (pF) Packaging Form Factor Advantages 5 x 5 10 kA 5 A 100 A, >300 Operations 90 - 600 <1 Bulk, Tape & Reel Core, Axial leaded • 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* 2036-xx-XX Medium Duty, 3-Electrode Mini TRIGARD™ GDT Size (mm) Max. Surge (8/20 µs) 1 operation AC Discharge Life (10 operations) Surge Life (10/1000 µs) DC Breakdown Range (V) Capacitance (pF) Packaging Form Factor Advantages 5 x 7.5 20 kA 10 A 200 A, >300 Operations 75 - 600 <2 Bulk Core, Radial leaded • Long and stable service life • Balanced Mini TRIGARD™ design • Medium duty AC & surge current rating • Low capacitance and insertion loss • Switch-Grade Fail-Short available • UL Listed and RoHS compliant* 2036-xx-SM Medium Duty, 3-Electrode Surface Mount Mini TRIGARD™ GDT Size (mm) Max. Surge (8/20 µs) 1 operation AC Discharge Life (10 operations) Surge Life (10/1000 µs) DC Breakdown Range (V) Capacitance (pF) Packaging Form Factor Advantages 5 x 7.3 20 kA 10 A 200 A, >300 Operations 75 - 600 <2 Bulk, Tape & Reel Surface mount • Long and stable service life • Balanced Mini TRIGARD™ design • Medium duty AC & surge current rating • Low capacitance and insertion loss • Switch-Grade Fail-Short available • UL Listed and RoHS compliant* 2038-xx-SM Light Duty, Symmetrical 3-Electrode Surface Mount Mini TRIGARD™ GDT Size (mm) Max. Surge (8/20 µs) 1 operation AC Discharge Life (10 operations) Surge Life (10/1000 µs) DC Breakdown Range (V) Capacitance (pF) Packaging Form Factor Advantages 5 x 7.3 10 kA 5 A 200 A, >300 Operations 150 - 1100 <1 Bulk, Tape & Reel Surface mount • Long and stable service life • Light duty AC & surge current ratings • Symmetric breakdown voltage (L-L & L-G) • Compact size ideal for board level protection • Low capacitance and insertion loss • UL Listed and RoHS compliant* 10 Premium GDTs 2053-xx-SM Light Duty, 2-Electrode Miniature GDT Size (mm) Max. Surge (8/20 µs) 1 operation AC Discharge Life (1 operation) Surge Life (10/1000 µs) DC Breakdown Range (V) Capacitance (pF) Packaging Form Factor Advantages 4 x 4.2 5 kA 3 A 100 A, 300 Operations 75 - 600 <1 Tape and Reel Surface Mount • Medium service life • Light duty surge rating • Mini-surface mount • Low capacitance and insertion loss • UL Listed and RoHS compliant* 2051-xx-SM Light Duty, 2-Electrode Surface Mount µGDT Size (mm) Max. Surge (8/20 µs) 1 operation AC Discharge Life (1 operation) Surge Life (10/1000 µs) DC Breakdown Range (V) Capacitance (pF) Packaging Form Factor Advantages 2.7 x 3.2 x 4.5 2 kA Not Rated 10 A, 100 Operations 90 - 600 <1 Tape and Reel Surface Mount • Medium service life • Compact low profile footprint • µSurface mount • Low capacitance and insertion loss • Light duty surge rating • UL Listed and RoHS compliant* 2052-xx-SM Light Duty, Symmetrical 3-Electrode Miniature GDT Size (mm) Max. Surge (8/20 µs) 1 operation AC Discharge Life (1 operation) Surge Life (10/1000 µs) DC Breakdown Range (V) Capacitance (pF) Packaging Form Factor Advantages 5 x 7.2 10 kA 5 A 200 A, 150 Operations 230 - 800 <2 Tape and Reel Surface Mount • Medium service life • Light duty surge rating • Mini-surface mount • Low capacitance and insertion loss • UL Listed and RoHS compliant* 2045-xx-XX Medium Duty, 2-Electrode GDT Size (mm) Max. Surge (8/20 µs) 1 operation AC Discharge Life (1 operation) Surge Life (10/1000 µs) DC Breakdown Range (V) Capacitance (pF) Packaging Form Factor Advantages 8 x 6 15 kA 5 A 100 A, 500 Operations 75 - 470 <1.5 Bulk, Tape and Reel Axial leaded • Medium service life • Medium duty surge rating • Low capacitance and insertion loss • UL Listed and RoHS compliant* 2049-xx-XX Medium Duty, 2-Electrode GDT Size (mm) Max. Surge (8/20 µs) 1 operation AC Discharge Life (1 operation) Surge Life (10/1000 µs) DC Breakdown Range (V) Capacitance (pF) Packaging Form Factor Advantages 8 x 6 20 kA 20 A 100 A, 500 Operations 75 - 600 <1.5 Bulk, Tape and Reel Axial leaded • Medium service life • Medium duty surge rating • Low capacitance and insertion loss • UL Listed and RoHS compliant* Premium GDT Devices 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. 11 2054-xx-SM Light Duty, 3-Electrode Miniature Surface Mount GDT Size (mm) Max. Surge (8/20 µs) 1 operation AC Discharge Life (1 operation) Surge Life (10/1000 µs) DC Breakdown Range (V) Capacitance (pF) Packaging Form Factor Advantages 5 x 7.2 10 kA 5 A 200 A, 5 Operations 230 - 470 <2 Tape and Reel Surface Mount • Medium service life • Light duty surge rating • Mini-surface mount • Low capacitance and insertion loss • UL Listed and RoHS compliant* 2055-xx-SM Light Duty, 2-Electrode Miniature Surface Mount GDT Size (mm) Max. Surge (8/20 µs) 1 operation AC Discharge Life (1 operation) Surge Life (10/1000 µs) DC Breakdown Range (V) Capacitance (pF) Packaging Form Factor Advantages 6 x 4.2 N/A 10 A 100 A, 300 Operations 230 - 600 <1 Tape and Reel Surface Mount • Medium service life • Light duty surge rating • Mini-surface mount • Low capacitance and insertion loss • UL Listed and RoHS compliant* 2056-xx-XX Light Duty, 3-Electrode GDT Size (mm) Max. Surge (8/20 µs) 1 operation AC Discharge Life (1 operation) Surge Life (10/1000 µs) DC Breakdown Range (V) Capacitance (pF) Packaging Form Factor Advantages 6 x 8.5 10 kA 5 A 200 A, 100 Operations 90 - 600 <2 Bulk Radial leaded • Medium service life • Light duty surge rating • Compact mini size • Fail-Short available • Low capacitance and insertion loss • UL Listed and RoHS compliant* 2057-xx-XX Light Duty, 2-Electrode Miniature GDT Size (mm) Max. Surge (8/20 µs) 1 operation AC Discharge Life (1 operation) Surge Life (10/1000 µs) DC Breakdown Range (V) Capacitance (pF) Packaging Form Factor Advantages 5.5 x 6 10 kA 5 A 100 A, 300 Operations 75 - 470 <1 Bulk, Tape and Reel Axial leaded • Medium service life • Light duty surge rating • Compact mini size • Low capacitance and insertion loss • UL Listed and RoHS compliant* *RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011. 12 High-Current GDTs 2047-xx-XX Heavy Duty, 2-Electrode GDT Size (mm) Max. Surge (8/20 µs) DC Breakdown Range (V) Capacitance (pF) Packaging Form Factor Advantages 12.7 x 12.7 >40 kA 90 - 350 <5 Bulk Core, radial leaded • Heavy duty • >40 kA 8/20 µs surge current rating • 8 kA 10/350 µs surge current rating • High isolation resistance • Long life and stability over service life • Terminals available • Low capacitance and insertion loss • UL Listed and RoHS compliant* 2061-xx-A 2-Electrode Power GDT Size (mm) Max. Surge (8/20 µs) DC Breakdown Range (V) Capacitance (pF) Packaging Form Factor Advantages 11.8 x 12 60 kA 230 - 800 <10 Bulk Core • Heavy duty • 60 kA 8/20 µs surge current rating • High isolation resistance • Low capacitance and insertion loss • UL Listed and RoHS compliant* 2063-xx-A 2-Electrode Power GDT Size (mm) Max. Surge (8/20 µs) DC Breakdown Range (V) Capacitance (pF) Packaging Form Factor Advantages 11.8 x 17 100 kA 230 - 800 <10 Bulk Core • Heavy duty • 100 kA 8/20 µs surge current rating • High isolation resistance • Low capacitance and insertion loss • UL Listed and RoHS compliant* 2097-xx-D Heavy Duty, 2-Electrode GDT Size (mm) Max. Surge (8/20 µs) DC Breakdown Range (V) Capacitance (pF) Packaging Form Factor Advantages 11.8 x 32 25 kA 1000 - 2200 <10 Bulk Core with lugs • High-voltage DC breakdown voltages up to 2.2 kV • High isolation resistance • 25 kA 8/20 µs surge current rating • Low capacitance and insertion loss • UL Listed and RoHS compliant* *RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011. High-Current GDT Devices High-current GDT devices are designed to handle very large impulse discharge