Gas Discharge Tubes GTCX28-XXXM-R20 Series Littelfuse Circuit Protection 8mm 2Pole GDTs (ceramic gas discharge tubes), are commonly used to help protect sensitive telecom equipment such as communication lines, signal lines and data transmission lines from damage caused by transient surge voltages that typically result from lightning strikes and equipment switching operations. Littelfuse Circuit Protection GDTs offer a high level of surge protection, low capacitance and a broad array of breakover voltage levels, making them suitable for applications such as MDF (Main Distribution Frame) modules, high data-rate telecom applications (e.g. ADSL, VDSL), and surge protection on power lines. Littelfuse Circuit Protection GDTs, can help equipment meet the most stringent regulatory standards. Benefits: Features: Helps provide overvoltage fault protection against high energy surges 2Pole, 8mm devices Suitable for high-frequency applications Broad voltage range from 75V-350V Various form factors: surface mount, axial leads, no leads Low capacitance and insertion loss UL 497B recognized RoHS compliant Devices tested per ITU K.12 recommendations Non-radioactive materials Applications : Telecommunications * Industrial and consumer electronics, such as - MDF modules, xDSL equipment, RF system - Surge protectors protection, antenna, base station - Alarm system (c) 2016 Littelfuse,Inc. Telecommunications Specifications are subject to change without notice Revised July26,2016. All rights reserved. MDF modules, xDSL equipment, RF sytem 1 Protection, antenna, pase station Document: * Industrial and consumer electronics, such as SCD27622 Status: Released Rev: D Date: JULY 26, 2016 Gas Discharge Tubes GTCX26-XXXM-R05 Series GTCX28-XXXM-R20 Series Device Voltage Ratings and Part Marking Part Number Impulse Sparkover DC Sparkover DC Holdover Voltage On-State Voltage @100V/s 20% Tolerance (V) @100 V/s (V) @1000 V/s (V) GTCX28-750M-R20 75 450 550 <52 20 GTCX28-900M-R20 90 450 550 <52 20 GTCX28-141M-R20 140 500 600 <80 20 GTCX28-151M-R20 150 500 600 <80 20 GTCX28-201M-R20 200 600 700 <135 20 GTCX28-231M-R20 230 600 700 <135 20 GTCX28-251M-R20 250 600 700 <135 20 GTCX28-261M-R20 260 700 800 <135 20 GTCX28-301M-R20 300 800 900 <150 20 GTCX28-351M-R20 350 900 1000 <150 20 Per ITU K.12 (<150ms) (V) Nominal (@ 1A) (V) Note:X options: S: Surface-mount; A: Axial-leaded; N: No-leaded Part Marking : XX = lot code Device Surge Rating, Capacitance, Insulation Resistance, UL Listing Part Number Impulse Discharge Current Impulse Life AC Discharge Current (1sec duration; 10 hits) Capacitance Insulation Resistance UL Rating 8x20s 10 hits 10x1000s 300 hits @50 Hz @1Mhz @100V* UL497B #E179610 20kA 100A 20Arms <1.5pF 10,000 (M) All Devices GTCX28-XXXM-R20 * Devices <=150V measured @ 50V; (c) 2016 Littelfuse,Inc. Specifications are subject to change without notice Revised July 26,2016. All rights reserved. 2 Document: SCD27622 Status: Released Rev: D Date: JULY 26, 2016 GTCX26-XXXM-R05 Series GTCX28-XXXM-R20 Series Product Dimensions Gas Discharge Tubes DIMENSIONS = MILLIMETERS [INCHES] Surface-mount (GTCS28-XXXM-R20) No Leads (GTCN28-XXXM-R20) Axial Leads (GTCA28-XXXM-R20) Pad Layout - Surface- mount Devices (GTCS28-XXXM-R20) mm: in*: X NOM 9.0 (0.354) Y NOM 5.6 (0.220) (c) 2016 Littelfuse,Inc. Specifications are subject to change without notice Revised July 26,2016. All rights reserved. Z NOM 1.2 (0.047) 3 Document: SCD27622 Status: Released Rev: D Date: JULY 26, 2016 GTCX26-XXXM-R05 Series GTCX28-XXXM-R20 Series Gas Discharge Tubes General Characteristics No Radioactive Material Storage Temperature: -40C to +90C Operating Temperature: -40C to +90C Body: Nickel Plated Leads: Surface-mount, Axial Devices: Tin Plated Devices with No Leads: Nickel Plated Soldering Note: Devices with no leads are non-solderable; meant for insertion into magazine clips m Packaging Information Part Description Tray / Reel Standard Package No Leads: GTCN28-XXXM-R20 Axial Leads: GTCA28-XXXM-R20 Surface-mount: GTCS28-XXXM-R20 Tape & Reel SMD part: GTCS28-XXXM-R20-2 100pcs 100pcs 100pcs 500pcs 2,000pcs 1,000pcs 2,000pcs 4,000pcs Part Numbering System Example Part Number: GTCX28-231M-R20 GT = C= X= 2= 8= 231 = M= Gas Tube Ceramic Lead Configuration: N= No leads; A= Axial Leads; S= Surface-mount 2 Electrode device 8mm Diameter DC Spark Over Voltage of 230V (at 100V/s) Tolerance of 20% on DC Spark Over Voltage R= 20 = Product Family Designator Surge rating: 8x20s 20kA 10 times (c) 2016 Littelfuse,Inc. Specifications are subject to change without notice Revised July 26,2016. All rights reserved. 4 Document: SCD27622 Status: Released Rev: D Date: JULY 26, 2016 GTCX26-XXXM-R05 Series GTCX28-XXXM-R20 Series Gas Discharge Tubes Part Marking Reference Guide Example Part Marking: = 23 = R20 = GN = 23 R20 GN Manufacture Mark Voltage Designator (23 = 230V) Product Family Designator + Surge Current 20kA (8x20s 10 hits) Year and Week of Manufacture Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. (c) 2016 Littelfuse,Inc. Specifications are subject to change without notice Revised July 26,2016. All rights reserved. 5 Document: SCD27622 Status: Released Rev: D Date: JULY 26, 2016