Gas Discharge Tubes CG7 Series CG7 Series RoHS Description Agency Approvals AGENCY AGENCY FILE NUMBER E128662 Features E320116 • RoHS compliant and Lead-free • Excellent Surge Withstanding Capability • Excellent response to fast rising transients. • Ultra Low Insertion Loss and low off-state capacitance for GHz bandwidth compatibility • Ultra small devices offered in SMD package Two Electrode GDT Graphical Symbol Additional Information Datasheet Resources © 2017 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 12/12/17 The Littelfuse CG7 series GDT is a miniature surface mount device with a 1kA 8/20μS surge rating. Its low insertion loss and thus low offstate capacitance makes it compatible with high bandwidth applications up to the GHz RF range. This GDT’s crowbarring characteristic protects sensitive ICs from surges as defined in ITU K.20/21/45 Basic and Enhanced Recommendations, GR-1089-CORE first level lightning Port Type 1 and 3, and IEC 610004-5 2nd edition. It is hermetically sealed using nonradioactive materials Classes 1-3 and some Class 4 & 5 cases and is thus environmentally safe. Its 2.8mm diameter size makes it the world’s smallest twoelectrode single chamber GDT available. Samples CG5 Series • 1kA 8/20μS surge capability pulse as defined by IEC 610004-5 2nd edition • Ultra Low capacitance (<0.3pF) • Voltage Range 75V to 470V • UL recognized Applications • Set top box • Cable Modem • Embedded Multimedia Terminal Adapter (EMTA) • RF Connector • Multimedia over Coax Alliance (MoCA) • Base Station RF antenna transmitter • G.Fast 106MHz and 212 MHz bandplans compatible • CATV/Broadband equipment • Data lines and Ethernet (up to 10GbE) • Telecom line protection • Broadband equipment • xDSL equipment, including ADSL2, ADSL, VDSL, VDSL2 30a bandplan compatible • IAD (Integrated Access Device) • Aerospace and Automotive Gas Discharge Tubes CG7 Series Electrical Characteristics Device Specifications (at 25°C) DC Breakdown in Volts (@100V/s) Part Number CG775 CG790 CG7120 CG7150 CG7200 CG7230 CG7250 CG7350 CG7400 CG7470 Impulse Breakdown in Volts Impulse Breakdown In Volts (@100V/µs) (@1kV/µs) MIN TYP MAX MAX 60 72 96 120 160 186 200 280 360 376 75 90 120 150 200 230 250 350 400 470 600 600 600 600 600 600 600 750 850 900 90 108 144 180 240 276 300 420 480 564 Insulation Resistance Capacitance (@1MHz) Max Impulse Discharge Current Max Impulse AC Dischage Current Discharge (9 cycle @50Hz) Current (10/700µs) DC Holdover Voltage (<150ms) Impulse Life (8/20µs) (100A) (8/20µs) MIN 700 700 700 700 700 700 700 900 1000 1100 Life Ratings MAX MIN MIN 52V 52V 80V 80V 135V 135V 135V 135V 135V 135V 1GΩ@50V 1GΩ@100V 0.3pf 10 Shots (@1kA) 1 1 Shot at 2kA 10 Shots (@ 100A/4kV) 2 1A 1GΩ@250V Notes: UL Pending for CG775 and CG7470. 1. 5 x (+) and 5 x (-) applications of 1kA 8/20μs sec. 2. 5 x (+) and 5 x (-) applications of 100A 10/700μs sec. 300 Shots Typical Insertion Loss @1.0GHz = 0.02dB Product Characteristics @1.4GHz = 0.03dB @1.8GHz = 0.05dB Materials Device Tin Plated 17.5 ± 12.5 Microns Construction: Ceramic Insulator @2.0GHz = 0.06dB Storage and Operational Temperature -40 to +90°C @2.8GHz = 0.08dB @2.4GHz = 0.07dB @3.1GHz = 0.09dB @3.5GHz = 0.10dB Voltage Vs. Time Characteristic @4.0GHz = 0.12dB Note: Insertion data for customer reference only, application testing needed for verification. Max dynamic breakover voltage 800 V-I Characteristic Curve Voltage (V) 600 Characteristics of Gas Plasma -response to transient condition I Axis 400 Hold over voltage 200 0 Arc Voltage Point at which gas tube is at lowest impedance and fully conductive. Typical arc voltage at about 10 to 12 Volts V Axis 0 200 400 600 800 1000 Max Dynamic Breakover Voltage (Impulse Breakdown) Point at which gas tube is at lowest impedance and fully conductive 1200 Time (ns) Note: Tested per 1kV/µs waveform Holdover Voltage Device resets to a high impedance state once the voltage across the device falls below this level. © 2017 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 12/12/17 Gas Discharge Tubes CG7 Series Soldering Parameters - Reflow Soldering (Surface Mount Devices) Pb – Free assembly Pre Heat - Temperature Min (Ts(min)) 150°C - Temperature Max (Ts(max)) 200°C - Time (Min to Max) (ts) 60 – 180 secs Average ramp up rate (Liquidus Temp (TL) to peak 3°C/second max TS(max) to TL - Ramp-up Rate 5°C/second max Reflow - Temperature (TL) (Liquidus) 217°C - Temperature (tL) 60 – 150 seconds 260 Time within 5°C of actual peak Temperature (tp) 10 – 30 seconds Ramp-down Rate 6°C/second max Time 25°C to peak Temperature (TP) 8 minutes Max. Do not exceed 260°C Critical Zone TL to TP Ramp-up TL TS(max) tL Ramp-down Preheat TS(min) 25 Peak Temperature (TP) +0/-5 tP TP Temperature Reflow Condition tS time to peak temperature (t 25ºC to peak) Time °C Device Dimensions Product Marking Dimensions in millimeters TOP VIEW A 7A PROFILE VIEW 2.8 ± 0.2 0.5 2.8 ± 0.2 Type Code 2.1 ± 0.2 3.5 ± 0.2 TOP VIEW 1.2 4 2.5 Recommended Soldering Pad Layout © 2017 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 12/12/17 A B T C O D R G I P Production Year Code (Laser Digit) Type Code CG775 CG790 CG7120 CG7150 CG7200 CG7230 CG7250 CG7350 CG7400 CG7470 Production Month Code A B C D E F G H I J K L Month Code January February March April May June July August September October November December Gas Discharge Tubes CG7 Series Taping and Reel Specifications Unit = mm Item Spec Item Spec P 8.0 ± 0.1 E 1.75 ± 0.1 P0 4.0 ± 0.1 D 1.50 + 0.1/-0.0 P2 2.0 ± 0.1 B0 3.9 ± 0.1 W 12.0 ± 0.3 K0 3.2 ± 0.1 F 5.5 ± 0.1 T 0.4 ± 0.1 A0 3.2 ± 0.1 10P0 P2 E P0 P D F W B0 T A0 4.0 ± 0.2 K0 330±4.0 >1.5 Packaging Quantity: 2500 pcs per reel (13”) 1 reels per inner box 10 inners box per carton 25,000 pcs per full carton 100 Typ. 15 Typ. Part Numbering System and Ordering Information CG7 XXX MS Series CG7 Breakdown Voltage 70 = 70V 90 = 90V 120 = 120V 150 = 150V 200 = 200V 230 = 230V 350 = 350V 400 = 400V 470 = 470V Surface Mount Disclaimer Notice - Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all applications. Read complete Disclaimer Notice at: www.littelfuse.com/disclaimer-electronics. © 2017 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 12/12/17