Gas Discharge Tubes High Voltage Series High Voltage Series Littelfuse Circuit Protection 8mm 2Pole high voltage GDTs (ceramic gas discharge tubes), are commonly used to help protect high voltage circuits. Littelfuse Circuit Protection high voltage GDTs offer a high level of surge protection, low capacitance and a broad array of break over voltage levels, making them suitable for applications such as branch circuits, medical electronics 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  2Pole, 8mm Axial and non Leaded devices against high energy surges  Broad voltage range from 800-4000V  Low capacitance  Crowbar overvoltage protection  UL 1449 recognized  RoHS compliant  Non-radioactive materials  Capable up to 10kA 8/20 μs surge Applications:  Power Supplies  Commercial Installations  Medical Electronics  Industrial Equipment and Machinery  Appliance (Hi-Pot) © 2016 Littelfuse,Inc D o c u m e n t :S SCCDD2288114433 Specifications are subject to change without notice Status: Released Revised July 26, 2016 Rev. A Date: JULY 26 1016 1

Gas Discharge Tubes High Voltage Series High Voltage Series Device Voltage Ratings, Surge Rating, Capacitance, Insulation Resistance, UL Impulse DC Impulse Insulation AC Discharge Part Description Capacitance Discharge UL Rating Sparkover Sparkover Resistance Current, 50 Hz Current, 8/20us ± 20% 100 V/μs 500Vdc 10 hits, 1 hit, 9 UL1449 1MHz (pF) 10 hits 1 hit @100V/s (V) (V) （MΩ） 1S cycles #E332226 GTCX28-801M-R05 800 1400 ≥ 10,000 ≤1 5kA 10kA 5A N/A All Devices GTCX28-102M-R03 1000 1700 ≥ 10,000 ≤1 3KA 10kA 1A 5A All Devices GTCX28-122M-R03 1200 1900 ≥ 10,000 ≤1 3KA 10kA 1A 5A All Devices GTCX28-152L-R03 1500(± 15%) 2200 ≥ 10,000 ≤1 3KA 10kA 1A 5A All Devices GTCX28-212M-R03 2100 2700 ≥ 10,000 ≤1 3KA 10kA 1A 5A All Devices GTCX28-242M-R03 2400 3300 ≥ 10,000 ≤1 3KA 10kA 1A 5A All Devices GTCX28-252M-R03 2500 3500 ≥ 10,000 ≤1 3KA 10kA 1A 5A All Devices GTCX28-272L-R03 2700 (± 15%) 3700 ≥ 10,000 ≤1 3KA 10kA 1A 5A All Devices GTCX28-302M-R03 3000 4000 ≥ 10,000 ≤1 3KA 10kA 1A 5A All Devices GTCX28-312L-R03 3100 (± 15%) 4300 ≥ 10,000 ≤1 3KA 10kA 1A 5A All Devices GTCX28-362M-R03 3600 4600 ≥ 10,000 ≤1 3KA 10kA 1A 5A All Devices GTCX28-402M-R03 4000 5000 ≥ 10,000 ≤1 3KA 10kA 1A 5A All Devices Product Dimensions: Axial Leads (GTCA28-XXXX-R0X) No Leads (GTCN28-XXXX-R0X) © 2016 Littelfuse,Inc D o c u m e n t :S SCCDD2288114433 Specifications are subject to change without notice Status: Released Revised July 26, 2016 Rev. A Date: JULY 26 1016 2

Gas Discharge Tubes High Voltage Series High Voltage Series DIMENSIONS = MILLIMETERS [INCHES] General Characteristics: No Radioactive Materials Storage temperature: -40°C … +90°C Operating temperature: -40°C … +90°C Electrode: Fe-Ni alloy, Ni plated Lead wire: Tin Plated Copper Materials Information ROHS Compliant ELV Compliant Pb-Free Packaging Information Part Description Tray / Reel Standard Package Axial Leads: GTCA28-XXXX-R0X 100 1000 No Leads: GTCN28-XXXM-R0X 100 2000 Part Numbering System Example Part Number: GTCA28-212M-R03 GT = Gas Tube C = Ceramic A = A= Axial Leads 2 = 2 Electrode device 8 = 8mm Diameter 212= DC Spark Over Voltage of 2100V (at 100V/s) M = Tolerance of 20% on DC Spark Over Voltage R = Product Family Designator 03 = Surge rating: 8x20Es 3kA 10 times © 2016 Littelfuse,Inc D o c u m e n t :S SCCDD2288114433 Specifications are subject to change without notice Status: Released Revised July 26, 2016 Rev. A Date: JULY 26 1016 3

Gas Discharge Tubes High Voltage Series High Voltage Series Part Marking Reference Guide Example Part Marking: 212 R03 HB = Manufacturer’ Mark 212 = Voltage Designator (212 = 2100V) R03 = Product Family Designator - Surge Current 3kA (8x20µs 10 hits) HB = 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. © 2016 Littelfuse,Inc D o c u m e n t :S SCCDD2288114433 Specifications are subject to change without notice Status: Released Revised July 26, 2016 Rev. A Date: JULY 26 1016 4