CG2470LSN

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

## **CG/CG2 Series** 

## ~~**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**~~ 

**==> picture [177 x 7] intentionally omitted <==**

**----- Start of picture text -----**<br>
AGENCY AGENCY FILE NUMBER<br>**----- End of picture text -----**<br>


## ~~**2 Electrode GDT Graphical Symbol**~~ 

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**~~ 

construction 

(<1.5pf) 

mount, and a variety of lead options options 

## ~~**Applications**~~ 

and equipment 

protection 

©2011 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. 

**20** Revised: September 26, 2011 

**CG/CG2 Series** 

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

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

|Part<br>Number<br>Po|**Device Specifications**(at 25°C)|**Device Specifications**(at 25°C)|**Device Specifications**(at 25°C)|**Device Specifications**(at 25°C)|**Device Specifications**(at 25°C)|**Device Specifications**(at 25°C)|**Device Specifications**(at 25°C)|**Device Specifications**(at 25°C)|**Life Ratings**|**Life Ratings**|**Life Ratings**|**Life Ratings**|**Life Ratings**|**Life Ratings**|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
||DC Breakdown<br>in Volts<br>(@100V/s)|||Impulse<br>Break-<br>down<br>in Volts<br>(@100V/μs)|Impulse<br>Break-<br>down In<br>Volts<br> (@1 Kv/μsec)|Insulation<br>Resistance|Capaci-<br>tance<br>(@1MHz)|Arc<br>Voltage<br>(on state<br>Voltage)<br>“tin|Surge<br>Life<br>10/1000μs)<br>(@500A|Nominal<br>Impulse<br>Discharge<br>Current<br>2045) ||Nominal<br>AC<br>Discharge<br>Current<br>(10x1sec<br>| @socony|AC<br>Dischage<br>Current<br>(9 cycle<br> |OM|Dischage<br>DC<br>Holdover<br>Voltage2|Max<br>Impulse<br>Discharge<br>Current<br>eet|
||MIN<br>Po~~t~~|TYP<br>~~t~~<br>~~|~~|MAX<br>~~TT~~|MAX<br>~~TT~~|~~TT~~|MIN|MAX|TYP|||||TYP||
|CG75<br>Po|60<br>Po~~t~~|75<br>~~t~~<br>~~|~~|90<br>~~TT~~|400<br>~~TT~~|650<br>~~TT~~|1010<br>(at 50V)<br>ao|1.5 pf|15 V|400<br>shots|10 shots<br>(@20kA)3|20 A|100 A<br>~~|~~|52 V|4kA|
|CG90<br>Po<br>||72<br>Po~~t~~<br>|<br>|<br>||90<br>~~t~~<br>~~|~~<br>|<br>~~{~~|108<br>~~TT~~<br>|<br>~~{|~~|400<br>~~TT~~<br>|<br>~~{|~~|600<br>~~TT~~<br>|<br>||||||||||
|CG90 SN<br>|<br>|<br>||72<br>|<br>|<br>|<br>{|<br>||90<br>~~{~~<br>{|<br>||108<br>~~{|~~<br>||400<br>~~{|{|~~|600<br>~~{|~~||||||||||
|CG110<br>|<br>|<br>||88<br>|<br>|<br>|<br>{|<br>|<br>||110<br>~~{~~<br>{|<br>|<br>{||132<br>~~{|~~<br>|<br>{|<br>{||450<br>~~{|{|~~<br>{||600<br>~~{|~~<br>||||||||80 V|2.5kA|
|CG2145<br>|<br>|<br>||116<br>|<br>{|<br>|<br>|<br>||145<br>{|<br>|<br>{||174<br><br>|<br>{|<br>{||500<br>~~{|~~<br>{|~~{|~~|600<br>~~{|~~<br>~~{|~~|1010<br>(at 100V)|||||||||
|CG2145 SN<br>|<br>|<br>|<br>||120<br>{|<br>|<br>|<br>|<br>|<br>|<br>|<br>||145<br>{|<br>|<br>{|<br>~~|~~<br>~~{|~~|174<br>|<br>{|<br>{|<br>~~**|**~~<br>~~{|{|~~|500<br>{|~~{|~~<br>~~{|~~<br>~~{|~~|600<br>~~{|~~<br>~~{||~~||||||||||
|CG2230<br>|<br>|<br>|<br>||195<br>|<br>|<br>|<br>|<br>|<br>**|**<br>||230<br>~~|~~<br>~~{|~~<br>~~|~~|265<br><br>~~**|**~~<br>~~{|{|~~<br>~~**{|**~~|600<br>~~{|~~<br>~~{|~~<br>~~{|~~<br>~~**{|**~~<br>~~|~~|700<br>~~{|~~<br>~~{||~~<br>~~|~~||||||||135 V||
|CG2230 SN<br>|<br>|<br>||184<br>|<br>|<br>|<br>|<br>**|**<br>||230<br>~~|~~<br>~~{|~~<br>~~|~~<br>~~{~~|276<br>~~**|**~~<br>~~{|{|~~<br>~~**{|**~~<br>|600<br>~~{|~~<br>~~{|~~<br>~~**{|**~~<br>~~|~~<br>|700<br>~~{||~~<br>~~|~~<br>||||||||||
|CG2250<br>|<br>|<br>||213<br>|<br>|<br>**|**<br>|<br>|<br>~~{|~~|250<br>~~{|~~<br>~~|~~<br>~~{~~<br>~~{|~~<br>~~|~~|288<br>~~{| {|~~<br>~~**{|**~~<br><br>~~tC~~|625<br>~~{|~~<br>~~{|~~<br>~~**{|**~~<br>~~|~~<br>~~{|~~<br>~~tC~~|725<br>~~{| |~~<br>~~|~~<br>~~{|~~<br>~~tC~~||||||||||
|CG2250 SN<br>|<br>|<br>Po|200<br>**|**<br>|<br>|<br>~~{|~~<br>Po~~t~~|250<br>~~|~~<br>~~{ ~~<br>~~{|~~<br>~~|~~<br>~~t~~<br>~~|~~|300<br>~~**{|**~~<br> <br>~~tC~~<br>~~|~~|625<br>~~**{|**~~<br>~~| ~~<br> ~~{|~~<br>~~tC~~|725<br> ~~|~~<br>~~{|~~<br>~~tC~~||||||||||
|CG2300<br>|<br>Po|255<br>|<br>~~{|~~<br>Po~~t~~<br>—~~|~~|300<br> <br>~~{|~~<br>~~|~~<br>~~t~~<br>~~|~~<br>~~|~~<br>~~|~~|345<br> <br>~~tC~~<br>~~|~~<br>~~|~~|700<br> ~~{|~~<br>~~tC~~<br>~~|~~|800<br>~~{|~~<br>~~tC~~<br>~~|~~||||||||||
|CG2300 SN<br>Po<br>||240<br>Po~~t~~<br>—~~|~~<br>|<br>||300<br>~~t~~<br>~~|~~<br>~~|~~<br>~~|~~<br>~~{|~~|360<br>~~|~~<br>~~|~~<br>~~{|~~<br>~~{|~~|700<br>~~|~~<br>~~{|~~|800<br>~~|~~<br>||||||||||
|CG2350<br>|<br>|<br>||297<br>— ~~|~~<br>|<br>|<br>|<br>|<br>||350<br>~~|~~<br>~~|~~<br>~~{|~~<br>~~{|~~|403<br>~~|~~<br>~~{|~~<br>~~{|~~<br>~~{|~~<br>~~|~~|750<br>~~|~~<br>~~{|{|~~<br>~~{|~~|900<br>~~|~~<br>~~{|~~<br>~~{||~~||||||||||
|CG2350 SN<br>|<br>|<br>|<br>||280<br>|<br>|<br>|<br>|<br>|<br>|<br>||350<br>~~{|~~<br>~~{|~~<br>~~{|~~<br>|420<br>~~{|~~<br>~~{|~~<br>~~{|~~<br>~~|~~<br>~~{|{|~~|750<br>~~{|{|~~<br>~~{|~~<br>~~{|~~<br>~~{|~~|900<br>~~{|~~<br>~~{||~~<br>~~{|~~~~**|**~~||||||||||
|CG2420<br>|<br>|<br>||357<br>|<br>|<br>|<br>|<br>|~~{|~~|420<br>~~{|~~<br>~~{|~~<br>~~{|~~<br>~~|~~|483<br><br>~~{|~~<br>~~|~~<br>~~{|{|~~<br>~~|~~|800<br>~~{|~~<br>~~{|~~<br>~~{|~~<br>~~{|~~<br>~~|~~|1000<br>~~{|~~<br>~~{||~~<br>~~{|~~~~**|**~~||||||||||
|CG2470<br>|<br>|<br>Po|400<br>|<br>|<br>|<br>|~~{|~~<br>Pot|470<br>~~{|~~<br>~~{|~~<br>~~{|~~<br>~~|~~<br>t<br>||540<br>~~{|~~<br>~~|~~<br>~~{|{|~~<br>~~|~~<br>~~ft~~|850<br>~~{|~~<br>~~{|~~<br>~~{|~~<br>~~|~~<br>~~ft~~|1200<br>~~{| |~~<br>~~{|~~~~**|**~~<br>~~ft~~||||||||||
|CG2470 SN<br>|<br>Po<br>||376<br>|<br>| ~~{|~~<br>Pot<br>|<br>||470<br>~~{|~~<br>~~{|~~<br>~~|~~<br>t<br>|<br>{||564<br>~~{| {|~~<br>~~|~~<br>~~ft~~<br>{|<br>||850<br>~~{|~~<br>~~{|~~<br>~~|~~<br>~~ft~~<br>{||1200<br>~~{| ~~~~**|**~~<br>~~ft~~<br>{||||||||||||
|CG2600<br>Po<br>|<br>||510<br>Pot<br>|<br>|<br>|<br>||600<br>t<br>|<br>{|<br>~~{|~~|690<br>~~ft~~<br>{|<br>|<br>~~{|~~<br>~~{|~~|1000<br>~~ft~~<br>{|<br>~~{|~~<br>~~{|~~|1400<br>~~ft~~<br>{||<br>~~{||~~||||||||||
|CG2600 SN<br>|<br>||480<br>|<br>|<br>|<br>||600<br>{|<br>~~{|~~|720<br>{|<br>|<br>~~{|~~<br>~~{|~~|1000<br>{|<br>~~{|~~<br>~~{|~~|1400<br>{| |<br>~~{||~~||||||||||
|CG28001<br>|<br>||680<br>|<br>|<br>|<br>||800<br>~~{|~~<br>tT|920<br>~~{|~~<br>~~{|~~<br>tT~~tT~~|1200<br>~~{|~~<br>~~{|~~<br>~~tT~~|1500<br>~~{| |~~<br>~~tT~~|||||10 shots<br>(@10kA)|10 A||||
|CG210001<br>||850 <br>|<br>||1000 <br>tT|1150<br>tT~~tT~~|1500<br>~~tT~~|1600<br>~~tT~~|||||||65 A<br>~~|~~|||



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

**LS, Axial:** Lead Wires: Tin Plated 175 + 12.5 Microns **Core: Materials** Device: Tin Plated 175 + 12.5 Microns. **MS:** Device: Dull Tin Plated 7-9 Microns LF Logo, Voltage and date code; Black in **Product Marking** positive print 

**Glow to arc transition current Glow Voltage Storage and Operational** -40 to +90 **Temperature Maximum Follow** 230 Volts **On Current[1]** 

©2011 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. 

**21** 

**CG/CG2 Series** 

Revised: September 26, 2011 

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

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

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

**==> picture [243 x 122] intentionally omitted <==**

**----- Start of picture text -----**<br>
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** 

**==> picture [243 x 138] intentionally omitted <==**

**----- Start of picture text -----**<br>
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** 

**==> picture [243 x 254] intentionally omitted <==**

**----- Start of picture text -----**<br>
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** 

**==> picture [243 x 224] intentionally omitted <==**

**----- Start of picture text -----**<br>
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>


©2011 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. 

**22** 

**CG/CG2 Series** 

Revised: September 26, 2011 

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

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

**==> picture [496 x 437] intentionally omitted <==**

**----- Start of picture text -----**<br>
Reflow Condition t P<br>T P<br>Critical Zone<br>- Temperature Min (Ts(min)) 150°C  Ramp-up TL to TP<br>Pre Heat a - Temperature Max (T- Time (Min to Max) (tss()max)) 200°C ee { T S(max) T L i t L |<br>[| Ramp-down<br>Average ramp up rate (Liquidus Temp  3°C/second max Preheat<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) time to peak temperature(t 25ºC to peak) Time<br>ee Peak Temperature (TP) +0/-5 °C<br>Time within 5°C of actual peak<br>Temperature (tp)<br>Ramp-down Rate<br>Finite Time 25°C to peak Temperature (TP)<br>Do not exceed 280°C<br>a Max<br>Soldering Parameters - Wave Soldering (Thru-Hole Devices)<br>300 Recommended Process Parameters:<br>280<br>260 Wave Parameter Lead-Free Recommendation<br>240 Preheat:<br>220200 (Depends on Flux Activation Temperature) —_ (Typical Industry Recommendation)<br>180 Temperature Minimum: 100° C<br>160 Temperature Maximum: 150° C<br>140120 Preheat Time: 60-180 seconds<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>Temperature<br>**----- End of picture text -----**<br>


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

©2011 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. 

**23** 

**CG/CG2 Series** 

Revised: September 26, 2011 

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

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

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

**==> picture [504 x 403] intentionally omitted <==**

**----- Start of picture text -----**<br>
<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** 

**==> picture [504 x 195] intentionally omitted <==**

**----- Start of picture text -----**<br>
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>


©2011 Littelfuse, Inc. 

**24** 

**CG/CG2 Series** 

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. 

Revised: September 26, 2011 

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

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

**==> picture [469 x 202] intentionally omitted <==**

**----- Start of picture text -----**<br>
CG2 XXX XX * XX<br>Series<br>CG  -- for 75, 90, or 110V Examples:<br>CG2   -- for 145V to 1000V<br>CG75 ���������������������������<br>Breakdown Voltage<br>75 300 CG2230L ������������������������<br>11090 350470 CG2800LTR ��������������������������������������������������������������������<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 = may have 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(Blank) = Shaped Lead (see LS dimensions), Tape & Reel - 500 per reel<br>**----- End of picture text -----**<br>


©2011 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. 

**25** 

**CG/CG2 Series** 

Revised: September 26, 2011