Gas Discharge Tube (GDT) Products CG/CG2 Series CG/CG2 Series RoHS Description Littelfuse highly reliable CG/CG2 Series GDTs provide a high degree of surge protection in a small size ideal for board level circuit protection. GDTs function as switches which dissipate a minimum amount of energy and therefore handle currents that far surpass other types of transient voltage protection. Their gas-filled, rugged ceramic metal construction make them well suited to adverse environments. The CG/CG2 series comes in a variety of forms including surface mount, core, straight and shaped leads, to serve a variety of mounting methods. Agency Approvals AGENCY AGENCY FILE NUMBER E128662 E320116 (CG2800 & CG21000 only) 2 Electrode GDT Graphical Symbol The CG Series (75-110V) is ideal for protection of test and communication equipment and other devices in which low voltage limits and extremely low arc voltages are required. The CG2 Series (145V-1000V) is ideal for protecting equipment where higher voltage limits and holdover voltages are necessary. Features •Rugged Ceramic-Metal construction •Low Capacitance (<1.5pf) •Meets REA PE-80 •Available in surface mount, and a variety of lead options options Applications •Communication lines and equipment •CATV equipment •Test equipment •Data lines •Power supplies © 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 01/13/15 •Instrumentation circuits •Medical electronics •ADSL equipment •Telecom SLIC protection Gas Discharge Tube (GDT) Products CG/CG2 Series Electrical Characteristics Device Specifications (at 25°C) DC Breakdown in Volts (@100V/s) Part Number MIN TYP MAX Impulse Breakdown in Volts Impulse Breakdown In Volts (@100V/µs) (@1 Kv/µsec) MAX 60 75 90 400 650 CG90 72 90 108 400 600 CG90 SN 72 90 108 400 600 CG110 88 110 132 450 600 CG2145 116 145 174 500 600 CG2145 SN 120 145 174 500 600 CG2230 195 230 265 600 700 CG2230 SN 184 230 276 600 700 CG2250 213 250 288 625 725 CG2250 SN 200 250 300 625 725 CG2300 255 300 345 700 800 CG2300 SN 240 300 360 700 800 CG2350 297 350 403 750 900 CG2350 SN 280 350 420 750 900 CG2420 357 420 483 800 1000 CG2470 1200 400 470 540 850 CG2470 SN 376 470 564 850 1200 CG2600 510 600 690 1000 1400 CG2600 SN 480 600 720 1000 1400 CG28001 920 1200 1500 850 1000 1150 1500 1600 CG21000 1 Insulation CapaciArc Resistance tance Voltage (@1MHz) MIN CG75 680 800 Life Ratings MAX (on state Voltage) @1Amp Min Surge Life (@500A 10/1000µs) Nominal Nominal AC DC Max Impulse AC Dischage Holdover Impulse Discharge Discharge Current Voltage2 Discharge (9 cycle Current Current Current (8/20µs) (10x1sec @50-60Hz) @50Hz) TYP (1 Application @ 10/350µs) TYP 52 V 1010 Ω (at 50V) 4kA 80 V 1.5 pf 15 V 400 shots 10 shots (@20kA)3 20 A 100 A 1010 Ω (at 100V) 2.5kA 135 V 10 shots (@10kA) 10 A 65 A NOTES: 1. Tested to UL1449 2. Reference REA PE-80, 0.2A. Tested to ITU-T Rec K.12 and REA PE 80 < 150 mSec. Product Characteristics Materials Product Marking LS, Axial: Device: Tin Plated 2–5 Microns Lead Wires: Tin Plated 17.5 ± 12.5 Microns Construction: Ceramic Insulator Core: Device: Tin Plated 17.5 ± 12.5 Microns. Construction: Ceramic Insulator MS: Device: Dull Tin Plated 7–9 Microns Construction: Ceramic Insulator Glow to arc transition current < 0.5Amps Glow Voltage 60-160 Volts Storage and Operational Temperature -40 to +90 Maximum Follow On Current1 230 Volts r.m.s, 200 Amps. (800V and 1000V devices tested to UL1449 3rd edition) LF Logo, Voltage and date code; Black in positive print © 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 01/13/15 ace Mount (MS) Dimensions Gas Discharge Tube (GDT) Products CG/CG2 Series TOP VIEW PROFILE VIEW SEMI–PROFILE VIEW SOLDER PAD LAYOUT 8.30 ± 0.1 4 ± 0.2 [0.161 ± 0.0080] 2.29 [0.090] 5.58 [0.232] ø8.30±0.1 6.05 ± 0.2 [0.268 ± 0.0080] 8.71 [0.343] Device Dimensions 5.89 [0.232] Ø6.81 [0.268] 0.47 ± 0.1 Leaded 'L' Type Straight Axial Devices PROFILE VIEW Leaded 'LS' Type Shaped Lead Devices TOP VIEW PROFILE VIEW TOP VIEW 6.07 ± 0.3 [0.239 ± 0.012] 8.10 Max. [0.319 DIA Max.] 0.81DIA. TYP. [0.032] 8.10DIA. MAX. [0.319] 8.40 ± 0.3 [0.331 ± 0.012] 6.07 ± 0.15 [0.239 ± 0.006] PROFILE VIEW 2 Surfaces TOP VIEW 6.07± 0.30 [0.239 ± 0.012] 8.4 ± 0.3 [0.331 ± 0.012] 0.40 ± 0.03 [0.0157 ± 0.0012] 0.004 62 ± 2 9.85 ± 0.30 [0.388 ± 0.012] SOLDER PAD LAYOUT 0.80 [0.032] 11.15 ± 0.30 [0.439 ± 0.012] 8.10 Max. [0.319 DIA Max.] Core Devices 8.40 ± 0.3 [0.331 ± 0.012] TOP VIEW 8.10 Max. [0.032 Max.] 9.85 [0.388] 8.66 [0.341] PROFILE VIEW 8.60 [0.339] SEMI–PROFILE VIEW 6.07 ± 0.15 0.004 0.40 ± 0.03 [0.0157 ± 0.0012] 2 Surfaces SOLDER PAD LAYOUT 9.85 [0.388] 1.80 [0.071] 11.68 [0.460] 11.65 [0.459] 8.10 Max. 9.85 ± 0.30 [0.388 ± 0.012] 1.77 [0.070] [0.239 0.81 ± 0.0059] [0.032] 8.4 ± 0.3 5.89 [0.232] [0.331 ± 0.012] 11.15 ± 0.30 [0.439 ± 0.012] 'MS' Type Devices 0.47 ± 0.1 [0.019 ± 0.0039] DIMENSIONS mm [inches] TOP VIEW 16 Littelfuse Trademark 250G XXXX Shaped Lead 4.00 PROFILE VIEW Voltage Rating 8.30 ± 0.1 Current Rating[0.327 ± 0.0039] Date Code 4 ± 0.2 (Contact Littelfuse [0.157 ± 0.0079] for additional information) R5.29 [R0.208] 5.58 [0.220] 6.05 ± 0.2 [0.238 ± 0.0079] ø8.30±0.1 1.75 SEMI–PROFILE VIEW 16 16 250G XXXX 24.00 250G XXXX 16 250G XXXX 16 250G XXXX 16 250G XXXX 2 9] 0. 7 ± .00 30 0 9. 6 ± 6 .3 [0 11.50 0.47 ± 0.1 [0.019 ± 0.0039] SOLDER PAD LAYOUT 2.29 [0.090] 16.00 0.512 (13.0) Arbor Hole Dia. 8.71 [0.343] 12.99 (330.0) 5.89 [0.232] 1.01 (25.7) Direction of Feed © 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 01/13/15 Gas Discharge Tube (GDT) Products CG/CG2 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 3°C/second max TS(max) to TL - Ramp-up Rate 5°C/second max - 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 tL Ramp-down Preheat TS(min) 25 Peak Temperature (TP) +0/-5 Critical Zone TL to TP Ramp-up TL TS(max) Average ramp up rate (Liquidus Temp (TL) to peak Reflow tP TP Temperature Reflow Condition tS time to peak temperature (t 25ºC to peak) Time °C Soldering Parameters - Wave Soldering (Thru-Hole Devices) Recommended Process Parameters: 280 Wave Parameter 260 Lead-Free Recommendation Preheat: 240 220 200 180 160 140 120 100 80 60 (Depends on Flux Activation Temperature) (Typical Industry Recommendation) Temperature Minimum: 100° C Temperature Maximum: Preheat Time: 150° C 60-180 seconds Solder Pot Temperature: 280° C Maximum Solder Dwell Time: 2-5 seconds 40 230 240 220 210 200 190 180 170 160 150 140 130 120 110 90 100 80 70 60 50 40 20 0 0 30 20 10 Temperature (°C) - Measured on bottom side of board 300 Time (Seconds) Cooling Time Preheat Time Dwell Time Soldering Parameters - Hand Soldering Solder Iron Temperature: 350° C +/- 5°C Heating Time: 5 seconds max. © 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 01/13/15 <0.8 Max Gas Discharge Tube (GDT) Products 52.4 [2.063] CG/CG2 Series 22.8 [0.898] 6.4 [0.252] 5.0 Pitch [0.197] Packaging Dimensions For 'L' Type Axial Lead Items <1.2 Max. Lead Bend 254.0 - 356.0 [10.0 - 14.0] <0.8 Max Direction of Feed 80.0 [3.15] 52.4 [2.063] 22.8 [0.898] 6.4 [0.252] 5.0 Pitch [0.197] Core and 'MS' Type Items 275.0 [10.83] 10x4 ± 0.1 = 40 ± 0.2 [10 x 0.157 ± 0.004 = 1.575 ± 0.008] 254.0 - 356.0 ± 0.1 [10.01.75 - 14.0] [0.069 ± 0.004] 0.4 ± 0.05 [0.016 ± 0.002] 100.0 [3.94] 4 ± 0.1 [0.157 ± 0.004] 1.5 DIA. MAX. [0.059] 76.0 [2.99] 25.0 [0.98] 7.5 ± 0.1 [0.295 ± 0.004] 8.5 ± 0.1 [0.335 ± 0.004] 80.0 [3.15] 16 +0.3 / -0.1 [0.630 +0.012 / -0.004] 17.7 [0.697] Direction of Feed Direction of Feed 1.5 DIA. MAX. [0.059] 8.6 ± 0.1 [0.339 ± 0.004] 12 ± 0.1 [0.472 ± 0.004] For 'LS' Type Shaped Lead Items 275.0 [10.82] 10x4 ± 0.1 = 40 ± 0.2 [10x.157 ± 0.004 = 1.575 ± 0.008] 1.75 ± 0.1 [0.069 ± 0.004] 0.5 ± 0.05 [0.020 ± 0.002] 1.9 [0.075] 11.75 ± 0.1 [0.463 ± 0.004] 1.5 DIA. MAX. [0.059] 100.0 [3.93] 4 ± 0.1 [0.157 ± 0.004] 76.0 [2.99] 11.5 ± 0.1 [0.453 ± 0.004] 8 ± 0.1 [0.315 ± 0.004] 24 +0.3 / -0.1 [0.945 +0.019 / -0.004] 25.0 [0.98] 25.7 [1.01] Direction of Feed 0.5 ± 0.01 [0.020 ± 0.004] 9 ± 0.1 [0.354 ± 0.004] © 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 01/13/15 1.5 DIA. MAX. [0.059] 16 ± 0.1 [0.630 ± 0.004] Gas Discharge Tube (GDT) Products CG/CG2 Series Part Numbering System and Ordering Information CG2 XXX XX * XX Series CG -- for 75, 90, or 110V CG2 -- for 145V to 1000V Breakdown Voltage 75 90 110 145 230 250 300 350 470 600 800 1000 Examples: CG75 -- A non-leaded 75V device CG2230L -- A leaded 230V device CG2800LTR -- A leaded 800V device, tape-and-reel (per EIA standard RS-296-D) Notes: CG/CG2 devices with other breakdown voltages in the 75-1000 V range are available upon request. Lead Option Code (Blank) = No Leads / Core L = Straight Leads LS = Shaped Leads MS = Surface Mount Option Code* SN = may have different DC Breakover Voltage Limit. Please refer to Electrical Characteristics table for additional information. Packaging Option Code (Blank) = No Leads / Core, Bulk Bag - 400 pcs L(Blank) = Straight Lead, Tray - 50 pcs LTR = Straight Lead, Tape & Reel per EIA RS-296-E - 500 per reel LS(Blank) = Shaped Lead (see LS dimensions), Tape & Reel - 500 per reel © 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 01/13/15