Gas Discharge Tubes SG Series SG Series RoHS Description Littelfuse SG series GDT offers high surge ratings in a miniature package. It’s designed for surface mounting on PCB with small size 4.5x3.2x2.7mm. Low insertion loss is perfectly suited to broadband equipment applications. The capacitance does not vary with voltage, and will not cause operational problems with ADSL2+, where capacitance variation across Tip and Ring is undesirable. These devices are extremely robust and are able to divert a 1000A pulse without destruction. Features Agency Approvals AGENCY •RoHS compliant and Lead-free •GHz working frequency •Excellent stability on multiple pulse duty cycle •Excellent response to fast rising transients. •Ultra Low Insertion Loss •1-2KA surge capability tested with 8/20μS pulse as defined by IEC 61000-4-5 AGENCY FILE NUMBER E128662 2 Electrode GDT Graphical Symbol Additional Information Applications •Communication Datasheet Resources © 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 11/06/15 •Ultra small devices offered in a variety of mounting lead forms •Non-Radioactive •Low capacitance (<1pF) •Voltage Ranges 75V to 600V •UL recognized •Conforms to ITU-T K12, IEC 1000-4-5 •Square Outline Samples equipment •CATV equipment •Test equipment •Data lines •Power supplies •Telecom SLIC protection •Broadband equipment •ADSL equipment, including ADSL2+ •XDSL equipment •Satellite and CATV equipment •General telecom equipment Gas Discharge Tubes SG Series Electrical Characteristics Device Specifications (at 25°C) Life Ratings DC Breakdown Impulse Impulse Insulation CapaciArc Glow Glow Nominal Nominal Nominal in Volts Breakdown Breakdown Resistance tance Voltage to Arc Voltage AC Impulse Impulse in Volts In Volts Transition Discharge Discharge Discharge (@100V/s) (@1MHz) (@1A) Current Current Current (@100V/µs) (@1 Kv/µsec) Current Part Number MIN TYP MAX SG75 52 75 98 SG90 63 90 117 SG150 105 150 195 MAX MIN 500 500 500 650 600 600 >1GΩ (at 50VDC) >1GΩ (at 100VDC) SG200 140 200 260 550 700 SG230 SG300 SG300Q SG350 SG350Q SG400 SG420 SG420Q SG450Q SG500Q SG600Q 172 225 210 263 263 300 315 315 370 400 450 650 700 580 750 600 800 800 650 680 950 1100 800 850 650 900 700 950 1000 750 750 1050 1200 230 300 300 350 350 400 420 420 450 500 600 288 375 390 437 437 500 525 525 500 600 750 (x10 @50Hz) (x10 @8/20µs) 2A 2kA MAX ~10 V ~1.0 A (10/1000µs 100 cycles) ~60 V <1 pf 2.5 A >1GΩ (at 50VDC) <0.8 pf <1 pf >1GΩ <0.5 pf (at 100VDC) <1 pf ~12 V ~20 V ~0.5 A ~0.8 A ~12 V ~0.5 A ~10 V ~20 V ~20 V ~16 V ~20 V 2A ~90 V ~140 V ~90 V ~140 V ~90 V ~60 V NA* 2A NA* 2A 2A NA* 1A <1.0 A ~0.1 A <0.5 A ~140 V 10 A 1kA 2A * Specification is not applicable for quick response (SGxxxQ) version of product Materials Device Tin Plated 17.5±12.5 Microns Construction Ceramic Insulator. Storage and Operational Temperature -40 to +90 °C Voltage vs. Time Characteristic Max dynamic breakover voltage Voltage (V) Product Characteristics Typical Insertion Loss Hold-over voltage @ 1.0 GHz = 0.01 dB On-State voltage @ 1.4GHz = 0.1 dB @ 1.8 GHz = 0.53 dB @ 2.1 GHz = 0.81 dB 0 200 400 600 800 1000 1200 Time (ns) @ 2.45 GHz= 1 dB @ 2.8 GHz = 1.2 dB @ 3.1 GHz = 1.5 dB @ 3.5 GHz = 2.1 dB © 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 11/06/15 Gas Discharge Tubes SG 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 Peak Temperature (TP) 260+0/-5 °C 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 tP TP Critical Zone TL to TP Ramp-up TL TS(max) Temperature Reflow Condition tL Ramp-down Preheat TS(min) 25 tS time to peak temperature (t 25ºC to peak) Time Device Marking Device Dimensions Type Production Code Year Code (last digit) Dimensions in Millimeters. A3A 3.2 +/- 0.3 Production Month Code 0.5 +/- 0.1 2.7 +/- 0.3 4.5 +/- 0.3 Type Code 5.2 2.8 4 Recommended Soldering Pad Layout © 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 11/06/15 A B C D E F G H I J K L M N O SG75 SG90 SG150 SG230 SG300 SG300Q SG350 SG350Q SG400 SG420 SG420Q SG450Q SG500Q SG600Q SG200 Month Code A B C D E F G H I J K L January February March April May June July August September October November December Gas Discharge Tubes SG Series Tape and Reel Dimensions (IEC 60286-3, dimension in mm) Part Numbering System and Ordering Information Tape Specifications IEC 60286-3 Dimensions in mm SG xxx Q section B-B 5° Series Square GDT 2 ±0.1 A 4 ±0.10 Ø 1.55 ±0.05 Ø 1.6 Breakdown Voltage ±0.1 75 = 75V 90 = 90V 150 = 150V 200 = 200V 230 = 230V 300 = 300V 350 = 350V 400 = 400V 420 = 420V 450 = 450V (Not available without “Q” suffix) 500 = 500V (Not available without “Q” suffix) 600 = 600V (Not available without “Q” suffix) +0.3 4.9 ±0.1 5° 12 0 5.5 ±0.1 1.75 ±0.1 section A-A 0.4 ±0.05 B 3 ±0.1 R0.5 typical A B 3.65 ±0.1 8 ±0.1 SMD-Tape has to withstand a minimum Force of F > 20 N / pocket 2 Kg / pocket minimum vertical load (minimum checking quantity:10 pockets) Device Option Code (Blank) = Standard device Q = Quick Response Version (300V, 350V, 420V, 450V, 500V, 600V only) Reel Specifications Packaging IEC 60286-3 Dimensions in mm Part Number and Device Type SGxxx Surface mount Quantity and Packaging Description 2000pcs/reel in tape and reel R0.75 Ø100 min. 12.8 min. Ø330 max. 20.2 min. 1.5 min. 18.4 max. 12.4 +2/-0 11.9 min. © 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 11/06/15