GDT Datasheet SH Series Gas Discharge Tubes RoHS Description The Littelfuse SH Gas Discharge Tubes (GDT) series provides high levels of protection against fast rising transients caused by lightning disturbances. It has a surge rating of 5kA, 8/20s. Offered in a Squared Surface Mount package, which helps to make pick and place on PCB process easier. This GDT series is perfectly suited for broadband equipment applications. The GDTs low off-state capacitance is compatible with high bandwidth applications and this capacitance loading value does not vary if the voltage across the GDT changes. The Littelfuse SH Gas Discharge Tube (GDT) series are specifically designed for protection of electrical, multimedia, and communication equipment against over voltage transients in surface mount assembly applications. Additional Information Features Excellent response to fast Offered with squared body rising transients package GHz working frequency Non-Radioactive 5kA, 8/20s surge capability Ultra Low capacitance as defined by IEC 61000-4-5 (<0.7pF) 2nd Edition Lead-free and RoHS Resources Accessories Samples UL Recognized compliant Agency Approvals Applications CA TV equipment IEEE 802.3 compliant Agency Agency File Number Ethernet interfaces Antennas E128662 Broad Band equipment RS 485 xDSL, ADSL, ADSL2, VDSL, Telecom Base Station and VDSL2 Power Supply AC Main Two Electrode GDT Graphical Symbol Medical Electronics G.fast Test Equipment EV power Charging General Telecom Equipment Inverter/Variable Frequency Renewable Energy Drivers (VFDs) 2021 Littelfuse, Inc. 1 Specifications are subject to change without notice. Revised: GD. 03/09/21GDT Datasheet SH Series Gas Discharge Tubes Electrical Characteristics Component Specifications (at 25C) Life Ratings Maximum AC AC Maximum Impulse DC Impulse DC Breakdown Impulse Capaci- Dischage Dischage Part Impulse Discharge Holdover Life in Volts Discharge tance Current Current Number Break-down Insulation Current Voltage (10/1000s) ( 100V/s) Current ( 1MHz) (50Hz, (9 Cycles Voltage Resistance (8/20s) (<150ms)* (100A) (8/20s) 1sec) 50Hz) 100V/ MIN TYP MAX 1000V/s 1 Time MIN MAX MAX MIN MIN MIN s SH75 60 75 90 600 700 52V 1G 50V SH90 72 90 108 600 700 52V SH145 116 145 174 600 700 52V 10 Shots SH230 186 230 276 600 700 80V SH250 200 250 300 600 700 135V 1G (5kA) 300 6kA 0.7pf 5A 15A Shots SH300 240 300 360 650 800 100V 135V 1 Shot at SH350 280 350 420 750 900 135V 6kA** SH400 360 400 480 850 1000 135V SH470 376 470 564 900 1100 135V 1G 250V SH600 480 600 720 1000 1200 135V Note: * Reference REA PE-80, 0.2A, tested to ITU-T Rec K.12 and REA PE 80 <150 ms. ** DC spark-over may exceed 25% after discharge, but will continue to protect without venting Product Characteristics Typical Insertion Loss Device Tin Plated 3 -15 Microns Materials 1.0GHz = 0.08dB Construction: Ceramic Insulator 1.4GHz = 0.16dB Storage and Operational -40 to +90C Temperature 1.8GHz = 0.26dB 2.0GHz = 0.33dB 2.4GHz = 0.47dB 2.8GHz = 0.59dB Voltage Vs. Time Characteristic 3.1GHz = 0.70dB 3.5GHz = 0.89dB Max dynamic 800 breakover voltage 4.0GHz = 1.24dB Note: Insertion data for customer reference only, application testing needed for verification. 600 400 Hold over voltage 200 On-state voltage 0 0200 400600 8001000 1200 Time (ns) Note: Tested per 1kV/s waveform 2021 Littelfuse, Inc. 2 Specifications are subject to change without notice. Revised: GD. 03/09/21 Voltage (V)