3R-8/T SERIES Gas Discharge Tube (GDT) Data Sheet Features ■ Provide ultra-fast response to surge voltage from slow-rising surge of 100V/s to rapid-rising surge of 1KV/μs. ■ Stable breakdown voltage. ■ High insulation resistance. ■ Low capacitance (≤2pF) ■ High holdover voltage ■ Large absorbing transient current capability. ■ Size: 8.0mm*10.0mm ■ Storage and operational temperature: -40℃ ~ +85℃ ■ Meets MSL level 1, per J-STD-020 ■ Safety certification: UL: E244458 Applications ■ ■ ■ ■ Repeaters, Modems. Telephone Interface, Line cards. Data communication equipment. Line test equipment Part Number Code Marking Revision：02-Sep-14 www.brightking.com 3R-8/T SERIES Dimensions T Type Dimension (mm) Symbol Spec. Tolerance D 8.0 ±0.2 T 10.0 ±0.3 L 7.0 ±0.5 d 1.0 ±0.05 Electrical Characteristics Part Number DC Spark-over Voltage Maximum Impulse Spark-over Voltage Nominal Impulse Discharge Current Alternating Discharge Current Impulse Life 100V/s 1000V/μs 8/20μs 10times 50Hz,1sec 10/1000μs 100A Test Voltage Minimum Insulation Resistance Maximum Capacitance 1MHz Device Marking Code (GΩ) (V) (V) (KA) (A) (times) DC(V) 3RM075L-8/T 75±20% 700 10 10 300 25 1.0 2.0 3RM075-8 3RM090L-8/T 90±20% 700 10 10 300 50 1.0 2.0 3RM090-8 3RM150L-8/T 150±20% 700 10 10 300 100 1.0 2.0 3RM150-8 3RM200L-8/T 200±20% 700 10 10 300 100 1.0 2.0 3RM200-8 3RM230L-8/T 230±20% 700 10 10 300 100 1.0 2.0 3RM230-8 3RM350L-8/T 350±20% 850 10 10 300 100 1.0 2.0 3RM350-8 3RM400L-8/T 400±20% 850 10 10 300 100 1.0 2.0 3RM400-8 3RM470L-8/T 470±20% 950 10 10 300 250 1.0 2.0 3RM470-8 3RM600L-8/T 600±20% 1300 10 10 300 250 1.0 2.0 3RM600-8 3RM800L-8/T 800±20% 1500 10 10 300 250 1.0 2.0 3RM800-8 Revision：02-Sep-14 (pF) www.brightking.com 3R-8/T SERIES Electrical Ratings Items Test Condition/Description Requirement DC Spark-over Voltage The voltage is measured with voltage ramp dv/dt=100V/s. Test is between each side electrode and center electrode. Maximum Impulse Spark-over Voltage The maximum impulse spark-over voltage is measured with voltage ramp dv/dt=1000V/μs. Test is between each side electrode and center electrode. Maximum surge current that can be applied through center electrode with 8/20μs waveform, for 10 times with 3min interval time, which will be equally divided between each side electrode to center electrode, without causing the DC breakdown voltage to change more than 25% form its initial measured value. Impulse Discharge Current To meet the specified value Alternating Discharge Current Rated RMS value of AC current at 50Hz, 1 sec. for 10 times with interval time 3 min. DC spark-over voltage shall not change more than ±25% from its initial value. Test is between each side electrode and center electrode. IR＞108 ohms (-20%, +30% for 70~90V). Insulation Resistance The resistance of gas tube shall be measured between each side electrodes and center electrode. Capacitance The capacitance of gas tube shall be measured between each side electrodes and center electrode. Test frequency: 1MHz Revision：02-Sep-14 www.brightking.com 3R-8/T SERIES Recommended Soldering Conditions Wave Soldering 300 Maximum Wave 265℃ Preheating Soldering Cooling 250 200 150 100 50 0 0 0.5 1 1.5 2 2.5 3 3.5 4 Time (minutes) Item Conditions Peak Temperature 265℃ Dipping Time 10 seconds Soldering 1 time Packaging Skin packing B Symbol A H Inner box B0 H0 A0 Dimension (mm) Spec. Tolerance A 217.0 ±1.0 B 207.0 ±1.0 H 10.3 ±0.2 Quantity: 100pcs A0 338.0 ±1.0 B0 336.0 ±1.0 H0 58.0 ±1.0 Quantity: 500pcs Revision：02-Sep-14 www.brightking.com