CG2-145L

**Gas Discharge Tube (GDT) Products** CG/CG2 Series 

## **CG/CG2 Series** 

® Al 

## ~~**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. 

## ~~**Agency Approvals**~~ 

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AGENCY AGENCY FILE NUMBER<br>® E128662<br>v7 \<br>® E320116<br>v7 \<br>2 Electrode GDT Graphical Symbol<br>**----- End of picture text -----**<br>


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. 

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 

   - Meets REA PE-80 

- Available in surface 

- • Low Capacitance mount, and a variety of (<1.5pf) lead options options 

## ~~**Applications**~~ 

- Communication lines • Instrumentation circuits and equipment • Medical electronics 

   - Medical electronics 

- CATV equipment 

   - ADSL equipment 

- Test equipment 

   - Telecom SLIC protection 

- Data lines 

- Power supplies 

©2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com for current information. Customer should verify actual device performance in their specific applications. 

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CG/CG2 Series 

## **Gas Discharge Tube (GDT) Products** 

## ~~**Electrical Characteristics**~~ 

||**Device Specifications**(at 25°C)<br>**Life Ratings**<br>~~eG~~|
|---|---|
|Part<br>Number|DC Breakdown<br>in Volts<br>(@100V/s)<br>Impulse<br>Break-<br>down<br>in Volts<br>(@100V/μs)<br>Impulse<br>Break-<br>down In<br>Volts<br> (@1 Kv/μsec)<br>Insulation<br>Resistance<br>Capaci-<br>tance<br>(@1MHz)<br>Arc<br>Voltage<br>(on state<br>Voltage)<br>@1Amp<br>Min<br>Surge<br>Life<br>(@500A<br>10/1000μs)<br>Nominal<br>Impulse<br>Discharge<br>Current<br>(8/20μs)<br>Nominal<br>AC<br>Discharge<br>Current<br>(10x1sec<br>@50-60Hz)<br>AC<br>Dischage<br>Current<br>(9 cycle<br>@50Hz)<br>DC<br>Holdover<br>Voltage2<br>Max<br>Impulse<br>Discharge<br>Current<br>(1 Application<br>@ 10/350μs)<br>MIN<br>TYP<br>MAX<br>MAX<br>MIN<br>MAX<br>TYP<br>TYP|



NOTES: 

1. Tested to UL1449 Third Edition 

2. Reference REA PE-80, 0.2A. Tested to ITU-T Rec K.12 and REA PE 80 < 150 mSec. 

3.  Leaded devices = 5x[5(+) or 5 (-)] applications 20kA 8/20μSec. (75 to 600 volt devices.) 

- MS and Core devices = 10x[5(+) and 5(-)] applications 10kA 8/20μS (800 to 1000 volt devices.) 

## ~~**Product Characteristics**~~ 

|**Materials**|**LS, Axial:**<br>Device: Nickel Plated 2–5 Microns<br>Lead Wires: Tin Plated 17.5 ± 12.5 Microns<br>Construction: Ceramic Insulator<br>**Core:**<br>Device: Tin Plated 17.5 ± 12.5 Microns.<br>Construction: Ceramic Insulator<br>**MS:**<br>Device: Dull Tin Plated 7–9 Microns<br>Construction: Ceramic Insulator|
|---|---|
|**Product Marking**|LF Logo, Voltage and date code; Black in<br>positive print|



|**Glow to arc**<br>**transition current**|< 0.5Amps|
|---|---|
|**Glow Voltage**|60-160 Volts|
|**Storage and**<br>**Operational**<br>**Temperature**|-40 to +90|
|**Maximum Follow**<br>**On Current1**|230 Volts r.m.s, 200 Amps.<br>(800V and 1000V devices tested to UL1449 3rd edition)|



©2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com for current information. Customer should verify actual device performance in their specific applications. 

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**Gas Discharge Tube (GDT) Products** CG/CG2 Series 

## ~~**Device Dimensions**~~ 

## **Leaded 'L' Type Straight Axial Devices** 

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PROFILE VIEW TOP VIEW<br>0.81 DIA. TYP.<br>[0.032]<br>8.10 DIA. MAX.<br>[0.319]<br>6.07 ± 0.15<br>[0.239 ± 0.006]<br>62 ± 2<br>**----- End of picture text -----**<br>


## **Core Devices** 

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TOP VIEW PROFILE VIEW SEMI–PROFILE VIEW<br>[0.032 Max.] 8.10 Max. 6.07 ± 0.15<br>[0.239 ± 0.0059]<br>5.89  [0.232]<br>0.47 ± 0.1<br>[0.019 ± 0.0039]<br>8.10 Max.<br>**----- End of picture text -----**<br>


## **Leaded 'LS' Type Shaped Lead Devices** 

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PROFILE VIEW TOP VIEW<br>6.07 ± 0.3 8.10 Max.<br>[0.239 ± 0.012] [0.319 DIA Max.]<br>8.40 ± 0.3<br>[0.331 ± 0.012]<br>0.80<br>    0.004 8.4 ± 0.3 [0.032]<br>2 Surfaces 0.40 ± 0.03 [0.331 ± 0.012]<br>9.85 ± 0.30 [0.0157 ± 0.0012]<br>[0.388 ± 0.012]<br>11.15 ± 0.30<br>[0.439 ± 0.012]<br>SOLDER PAD LAYOUT<br>9.85<br>[0.388]<br>8.60<br>[0.339]<br>1.80<br>[0.071]<br>11.65<br>[0.459]<br>**----- End of picture text -----**<br>


## **'MS' Type Devices** 

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TOP VIEW<br>8.30 ± 0.1 PROFILE VIEW SEMI–PROFILE VIEW<br>[0.327 ± 0.0039]<br>4 ± 0.2<br>[0.157 ± 0.0079] 5.58  [0.220]<br>R5.29  [R0.208] 6.05 ± 0.2<br>[0.238 ± 0.0079]<br>0.47 ± 0.1<br>[0.019 ± 0.0039]<br>SOLDER PAD LAYOUT<br>2.29  [0.090]<br>8.71  [0.343]<br>5.89  [0.232]<br>[0.366 ± 0.0079] 9.30 ± 0.2<br>ø8.30±0.1<br>**----- End of picture text -----**<br>


©2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com for current information. Customer should verify actual device performance in their specific applications. 

**29** 

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**Gas Discharge Tube (GDT) Products** CG/CG2 Series 

## ~~**Soldering Parameters - Refow Soldering (Surface Mount Devices)**~~ 

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Reflow Condition Pb – Free assembly t P<br>T P<br>Critical Zone<br>- Temperature Min (Ts(min)) 150°C  Ramp-up TL to TP<br>Pre Heat - Temperature Max (Ts(max)) 200°C T S(max) T L t L<br>- Time (Min to Max) (ts) 60 – 180 secs<br>Average ramp up rate (Liquidus Temp  3°C/second max Preheat Ramp-down<br>(TL) to peak T S(min)<br>TS(max) to TL - Ramp-up Rate 5°C/second max t S<br>Reflow - Temperature (TL) (Liquidus) 217°C  25<br>- Temperature (tL) 60 – 150 seconds time to peak temperature(t 25ºC to peak) Time<br>Peak Temperature (TP) 260 [+0/-5]  °C<br>Time within 5°C of actual peak<br>10 – 30 seconds<br>Temperature (tp)<br>Ramp-down Rate 6°C/second max<br>Time 25°C to peak Temperature (TP) 8 minutes Max.<br>Do not exceed 260°C<br>Temperature<br>**----- End of picture text -----**<br>


## ~~**Soldering Parameters - Wave Soldering (Thru-Hole Devices)**~~ 

## **Recommended Process Parameters:** 

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300<br>280<br>260 Wave Parameter Lead-Free Recommendation<br>240 Preheat:<br>220 (Depends on Flux Activation Temperature) (Typical Industry Recommendation)<br>200<br>180     Temperature Minimum: 100° C<br>160     Temperature Maximum: 150° C<br>140     Preheat Time: 60-180 seconds<br>120<br>100 Solder Pot Temperature: 280° C Maximum<br>80<br>60 Solder Dwell Time: 2-5 seconds<br>40<br>20<br>0<br>Time (Seconds)<br>Preheat Time Cooling Time<br>Dwell Time<br>Temperature (°C) - Measured on bottom side of board 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230 240<br>**----- End of picture text -----**<br>


## ~~**Soldering Parameters - Hand Soldering**~~ 

Solder Iron Temperature:  350° C +/-  5°C Heating Time:  5 seconds max. 

©2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com for current information. Customer should verify actual device performance in their specific applications. 

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**Gas Discharge Tube (GDT) Products** CG/CG2 Series 

## ~~**Packaging Dimensions**~~ 

## **For 'L' Type Axial Lead Items** 

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<1.2 Max. Lead Bend<br>254.0 - 356.0<br>[10.0 - 14.0]<br><0.8 Max<br>Direction of Feed<br>0.0<br>52.4 15]<br>[2.063]<br>22.8<br>[0.898]<br>6.4<br>[0.252]<br>5.0 Pitch<br>[0.197]<br>Core and 'MS' Type Items<br>275.0<br>[10.83]<br>10x4 ± 0.1 = 40 ± 0.2 100.0<br>[10 x 0.157 ± 0.004 = 1.575 ± 0.008] [3.94]<br>1.75 ± 0.1<br>0.4 ± 0.05 [0.069 ± 0.004] 1.5 DIA. MAX. 4 ± 0.1 76.0<br>[0.016 ± 0.002] [0.059] [0.157 ± 0.004] [2.99] 25.0<br>[0.98]<br>7.5 ± 0.1<br>8.5 ± 0.1 [0.295 ± 0.004]<br>[0.335 ± 0.004] 16 +0.3 / -0.1 17.7<br>[0.630 +0.012 / -0.004] [0.697]<br>Direction of Feed<br>1.5 DIA. MAX.<br>8.6 ± 0.1 [0.059] 12 ± 0.1<br>[0.339 ± 0.004] [0.472 ± 0.004]<br>**----- End of picture text -----**<br>


## **For 'LS' Type Shaped Lead Items** 

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275.0<br>10x4 ± 0.1 = 40 ± 0.2 [10.82]<br>[10x.157 ± 0.004 = 1.575 ± 0.008]<br>0.5 ± 0.05[0.020 ± 0.002] [0.069 ± 0.004]1.75 ± 0.1 1.5 DIA. MAX.[0.059] [0.157 ± 0.004]4 ± 0.1 76.0 100.0[3.93]<br>1.9 [2.99] 25.0<br>[0.075] [0.98]<br>11.5 ± 0.1<br>[0.453 ± 0.004]<br>11.75 ± 0.1 8 ± 0.1 24 +0.3 / -0.1 25.7<br>[0.463 ± 0.004] [0.315 ± 0.004] [0.945 +0.019 / -0.004] [1.01]<br>Direction of Feed<br>0.5 ± 0.01<br>[0.020 ± 0.004]<br>1.5 DIA. MAX.<br>9 ± 0.1 [0.059] 16 ± 0.1<br>[0.354 ± 0.004] [0.630 ± 0.004]<br>**----- End of picture text -----**<br>


©2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com for current information. Customer should verify actual device performance in their specific applications. 

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**CG/CG2 Series** 

Revised: November 10, 2009 

**Gas Discharge Tube (GDT) Products** CG/CG2 Series 

## ~~**Part Numbering System and Ordering Information**~~ 

## **CG2 XXX XX * XX** 

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Series<br>CG  -- for 75, 90, or 110V Examples:<br>CG2   -- for 145V to 1000V CG75  -- A non-leaded 75V device<br>Breakdown Voltage CG2230L  -- A leaded 230V device<br>75 300<br>90 350 CG2800LTR  -- A leaded 800V device, tape-and-reel  (per EIA standard RS-296-D)<br>110 470<br>145 600<br>230 800<br>250 1000 Notes:<br>Lead Option Code CG/CG2 devices with other breakdown voltages in the 75-1000 V range are available upon request.<br>(Blank) = No Leads / Core<br>L  = Straight Leads<br>LS  = Shaped Leads<br>MS  = Surface Mount<br>Option Code*<br>SN = denotes different DC Breakover<br>Voltage Limit. Please refer to Electrical<br>Characteristics table for additional<br>information.<br>Packaging Option Code<br>(Blank) = No Leads / Core, Bulk Bag - 400 pcs<br>L(Blank) = Straight Lead, Tray - 50 pcs<br>LTR  = Straight Lead, Tape & Reel per EIA RS-296-E - 500 per reel<br>L TE  = Straight Lead, Tape & Reel per IEC 60286-1 - 500 per reel<br>LS TR  = Shaped Lead (see LS dimensions), Tape & Reel - 500 per reel<br>**----- End of picture text -----**<br>


©2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com for current information. Customer should verify actual device performance in their specific applications. 

**32** 

**CG/CG2 Series** 

Revised: November 10, 2009