CG2420LTR - Littelfuse Inc.

Gas Discharge Tubes

Speciﬁcations are subject to change without notice.

Revised: 12/12/17

CG/CG2 Series

Description

Littelfuse’s 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.

The CG Series (75V-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

• RoHS and Lead-free

compliant

• Rugged Ceramic-Metal

construction

• Low Capacitance

(<1.5pf)

• Meets REA PE-80

• Available in surface

mount, and a variety of

lead options options

• RoHS Compliant and

Lead-Free

Applications

• Communication lines

and equipment

• CATV equipment

• Test equipment

• Data lines

• Power supplies

• Instrumentation circuits

• Medical electronics

• ADSL equipment

• Telecom SLIC

protection

AGENCY AGENCY FILE NUMBER

E1286621

E3201162

Agency Approvals

CG/CG2 Series

RoHS

2 Electrode GDT Graphical Symbol

NOTES:

1. Certiﬁed to UL 497B.

2. Only CG2300, CG2470, CG2600, CG2800 and CG221000. Certiﬁed to UL 1449.

Additional Information

Datasheet Samples

Resources CG/CG2

Samples

Gas Discharge Tubes

Speciﬁcations are subject to change without notice.

Revised: 12/12/17

CG/CG2 Series

Electrical Characteristics

Part

Number

Device Speciﬁcations (at 25°C) Life Ratings

DC Breakdown

in Volts

(@100V/s)

Impulse

Break-

down

in Volts

(@100V/µs)

Impulse

Break-

down In

Volts

(@1 Kv/µsec)

Insulation

Resistance

Capaci-

tance

(@1MHz)

Arc

Voltage

(on state

Voltage)

@1Amp

Min

Surge

Life

(@500A

10/1000µs)

Nominal

Impulse

Discharge

Current

(8/20µs)

Nominal

Discharge

Current

(10x1sec

@50-60Hz)

Dischage

Current

(9 cycle

@50Hz)

Holdover

Voltage2

Max

Impulse

Discharge

Current

(1 Application

@ 10/350µs)

MIN TYP MAX MAX MIN MAX TYP TYP

CG75

60 75 90 400 650

1010 Ω

(at 50V)

1.5 pf 15 V 400

shots

5 shots

(@20kA) 20 A 100 A

52 V 4kA

CG90

72 90 108 400 600

CG90 SN

72 90 108 400 600

CG110

88 110 132 450 600

80 V

2.5kA

CG2145

116 145 174 500 600

1010 Ω

(at 100V)

CG2145 SN

120 145 174 500 600

CG22301

195 230 265 600 700

135 V

CG2230 SN1

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

CG24701

400 470 540 850 1200

CG2470 SN1

376 470 564 850 1200

CG26001

510 600 690 1000 1400

CG2600 SN1

480 600 720 1000 1400

CG28001

680 800 920 1200 1500 10 shots

(@10kA) 10 A

CG210001

850 1000 115 0 1500 1600 65 A

Product Characteristics

Materials

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

Product Marking LF Logo, Voltage and date code; Black in

positive print

Glow to arc

transition current < 0.5Amps

Glow Voltage

60-160 Volts

Storage and

Operational

Temperature

-40 to +90

Maximum Follow

On Current

230 Volts r.m.s, 200 Amps.

(800V and 1000V devices tested to UL1449 3rd edition)

NOTES:

1. Certified to UL 1449.

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

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

10 x [5 (+) and 5 (-)] applications 10kA 8/20µSec. (800 and 100 volt devices.)

Gas Discharge Tubes

Speciﬁcations are subject to change without notice.

Revised: 12/12/17

CG/CG2 Series

Device Dimensions

[0.331 ± 0.012]

8.4 ± 0.3

[0.239 ± 0.012]

6.07 ± 0.3

[0.0157 ± 0.0012]

0.40 ± 0.03

0.004

2 Surfaces

[0.032]

0.80

[0.388 ± 0.012]

9.85 ± 0.30

[0.439 ± 0.012]

11.15 ± 0.30

[0.331 ± 0.012]

8.40 ± 0.3

8.10 Max.

[0.319 DIA Max.]

9.85

[0.388]

11.65

[0.459]

8.60

[0.339]

1.80

[0.071]

TOP VIEWPROFILE VIEW

SOLDER PAD LAYOUT

6.05 ± 0.2

[0.238 ± 0.0079]

5.58 [0.220]

ø8.30±0.1

R5.29 [R0.208]

4 ± 0.2

[0.157 ± 0.0079]

8.30 ± 0.1

[0.327 ± 0.0039]

8.71 [0.343]

2.29 [0.090]

5.89 [0.232]

0.47 ± 0.1

[0.019 ± 0.0039]

9.30 ± 0.2

[0.366 ± 0.0079]

TOP VIEW

PROFILE VIEW SEMI–PROFILE VIEW

SOLDER PAD LAYOUT

Leaded 'LS' Type Shaped Lead Devices

'MS' Type Devices

Leaded 'L' Type Straight Axial Devices

Core Devices

6.05 ± 0.2

[0.268 ± 0.0080]

5.58 [0.232]

8.71 [0.343]

2.29 [0.090]

5.89 [0.232]

4.00

16.00

24.00

11.50

1.75

TOP VIEW PROFILE VIEW SEMI–PROFILE VIEW SOLDER PAD LAYOUT

TOP VIEWPROFILE VIEW SOLDER PAD LAYOUT

DIMENSIONS mm

[inches]

Shaped Lead

0.512 (13.0) Arbor

Hole Dia.

1.01

(25.7)

12.99

(330.0)

Direction of Feed

250G

XXXX

Voltage Rating

Current Rating

Date Code

(Contact Littelfuse

for additional

information)

Littelfuse

Trademark

8.30 ± 0.1

9.30 ± 0.2

ø8.30±0.1

Ø6.81 [0.268]

0.47 ± 0.1

R5.29 [R0.208]

4 ± 0.2

[0.161 ± 0.0080]

8.10

DIA. MAX.

[0.319]

6.07 ± 0.15

0.81 DIA. TYP.

[0.032]

62 ± 2

[0.239 ± 0.006]

[0.331 ± 0.012]

8.4 ± 0.3

[0.0157 ± 0.0012]

0.40 ± 0.03

0.004

2 Surfaces

[0.032]

0.81

[0.388 ± 0.012]

9.85 ± 0.30

[0.439 ± 0.012]

11.15 ± 0.30

[0.239 0.012]

6.07 0.30

[0.331 ± 0.012]

8.40 ± 0.3

9.85 [0.388]

11.68 [0.460]

8.66 [0.341]

1.77 [0.070]

8.10 Max.

[0.319 DIA Max.]

250G

XXXX

250G

XXXX

250G

XXXX

250G

XXXX

250G

XXXX

Surface Mount (MS) Dimensions

TOP VIEW

PROFILE VIEW

6.07 ± 0.15

[0.239 ± 0.0059]

5.89 [0.232]

8.10 Max.

[0.032 Max.]

8.10 Max.

TOP VIEW PROFILE VIEW SEMI–PROFILE VIEW

0.47 ± 0.1

[0.019 ± 0.0039]

Gas Discharge Tubes

Speciﬁcations are subject to change without notice.

Revised: 12/12/17

CG/CG2 Series

Reﬂow Condition 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

Soldering Parameters - Reﬂow Soldering (Surface Mount Devices)

Time

Temperature

TS(max)

TS(min)

time to peak temperature

(t 25ºC to peak)

Ramp-down

Ramp-up

Preheat

Critical Zone

TL to TP

Soldering Parameters - Wave Soldering (Thru-Hole Devices)

Soldering Parameters - Hand Soldering

Dwell Time

100

120

140

160

180

200

220

240

260

280

300

100

110

120

130

140

150

160

170

180

190

200

210

220

230

240

Time (Seconds)

Temperature (°C) - Measured on bottom side of board

Cooling Time

Preheat Time

Wave Parameter Lead-Free Recommendation

Preheat:

(Depends on Flux Activation Temperature) (Typical Industry Recommendation)

Temperature Minimum: 100° C

Temperature Maximum: 150° C

Preheat Time: 60-180 seconds

Solder Pot Temperature: 280° C Maximum

Solder Dwell Time: 2-5 seconds

Recommended Process Parameters:

Solder Iron Temperature: 350° C +/- 5°C

Heating Time: 5 seconds max.

Gas Discharge Tubes

Speciﬁcations are subject to change without notice.

Revised: 12/12/17

CG/CG2 Series

Packaging Dimensions

24 +0.3 / -0.1

[0.945 +0.019 / -0.004]

11.5 ± 0.1

[0.453 ± 0.004]

1.75 ± 0.1

[0.069 ± 0.004]1.5 DIA. MAX.

[0.059]

1.5 DIA. MAX.

[0.059] 16 ± 0.1

[0.630 ± 0.004]

0.5 ± 0.05

[0.020 ± 0.002]

0.5 ± 0.01

[0.020 ± 0.004]

10x4 ± 0.1 = 40 ± 0.2

[10x.157 ± 0.004 = 1.575 ± 0.008]

4 ± 0.1

[0.157 ± 0.004]

11.75 ± 0.1

[0.463 ± 0.004]

8 ± 0.1

[0.315 ± 0.004]

9 ± 0.1

[0.354 ± 0.004]

1.9

[0.075]

Direction of Feed

25.7

[1.01]

275.0

[10.82]

100.0

[3.93]

25.0

[0.98]

76.0

[2.99]

For 'LS' Type Shaped Lead Items

Direction of Feed

254.0 - 356.0

[10.0 - 14.0]

80.0

[3.15]

22.8

[0.898]

52.4

[2.063]

6.4

[0.252]

<0.8 Max

<1.2 Max. Lead Bend

5.0 Pitch

[0.197]

16 +0.3 / -0.1

[0.630 +0.012 / -0.004]

7.5 ± 0.1

[0.295 ± 0.004]

8.5 ± 0.1

[0.335 ± 0.004]

1.75 ± 0.1

[0.069 ± 0.004] 1.5 DIA. MAX.

[0.059]

1.5 DIA. MAX.

[0.059] 12 ± 0.1

[0.472 ± 0.004]

8.6 ± 0.1

[0.339 ± 0.004]

0.4 ± 0.05

[0.016 ± 0.002]

10x4 ± 0.1 = 40 ± 0.2

[10 x 0.157 ± 0.004 = 1.575 ± 0.008]

4 ± 0.1

[0.157 ± 0.004]

Direction of Feed

17.7

[0.697]

275.0

[10.83]

100.0

[3.94]

25.0

[0.98]

76.0

[2.99]

For 'L' Type Axial Lead Items

Core and 'MS' Type Items

Direction of Feed

254.0 - 356.0

[10.0 - 14.0]

80.0

[3.15

]

22.8

[0.898]

52.4

[2.063]

6.4

[0.252]

<0.8 Max

<1.2 Max. Lead Bend

5.0 Pitch

[0.197]

Gas Discharge Tubes

Speciﬁcations are subject to change without notice.

Revised: 12/12/17

CG/CG2 Series

Part Numbering System and Ordering Information

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.

CG2 XXX XX * XX

Breakdown Voltage

110

145

230

250

300

350

470

600

800

1000

Series

CG -- for 75, 90, or 110V

CG2 -- for 145V to 1000V

Lead Option Code

Option Code*

(Blank) = No Leads / Core

L = Straight Leads

LS = Shaped Leads

MS = Surface Mount

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

SN = may have different DC Breakover

Voltage Limit. Please refer to Electrical

Characteristics table for additional

information.

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.