Littelfuse CG3 User Manual

Gas Discharge Tube (GDT) Products

AC and CG3 Series

AC and CG3 Series

Agency Approvals

AGENCY AGENCY FILE NUMBER

E320116

*NOTE: CG3 7.5 product UL approval is currently pending

*

Description

Littelfuse AC series two-electrode line protectors
provide a high degree of surge protection in AC line
applications. The two models, AC120 and AC240
are designed for use with 120VAC and 240VAC lines
respectively. They are able to extinguish AC follow-on
currents of at least 200A.

Littelfuse CG3 two electrode high voltage (1.0 - 7.5
KV) devices are designed for surge protection and
high isolation applications, and for applications
for which bias voltages or signal levels of several
hundred volts are normally present.

Features

• Rugged ceramic-metal
construction

• Low capacitance (<1.5
pF)

• Available in tape-and­reel packaging

• Available with or
without leads

2 Electrode GDT Graphical Symbol

Applications

AC Series:

• Long branch circuits
(AC wall outlet)

• Short branch circuits
(at breaker box,
computer, etc)

CG3 Series:

• CRT terminals

• CATV equipment

• Antennas

• Power supplies

• Test equipment

• Submersible pumps

• Medical electronics

• Power supplies

• Medical electronics

©2013 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.

AC and CG3 Series

Revised: February 19, 2013

Gas Discharge Tube (GDT) Products

AC and CG3 Series

Electrical Characteristics

Device Specifications (at 25°C) Life Ratings

DC Breakdown

in Volts

(@100V/s)

Part

Number

1

AC120

1

AC240

CG3 1.0

CG3 1.1

CG3 1.2

CG3 1.3

CG3 1.5

CG3 2.0

CG3 2.5

CG3 2.7

CG3 3.0

CG3 3.3

CG3 4.0

CG3 4.5

CG3 5.0

CG3 6.2

CG3 6.5

CG3 7.5

NOTES:

1. Refer to Production Dimensions section, outline A devices

2. Refer to Production Dimensions section, outline B devices

3. Tested to UL1449 Third Edition -- 120V r.ms. for AC120, 230V r.m.s. all others.
Conducted with suitable MOV connected in series.

4. 10 x [5(+) and 5(-)] applications 5kA @ 8/20μs

5. 1 x [1(+) and 1(-)] application 10kA @ 8/20μs

6. CG3 7.5 product UL approval is currently pending

7. When ordering this item, use suffix code D004 when entering the part number.
The older product version without D004 suffix code has been discontinued.
Refer to Part Numbering System section for additional information.

Device Dimension Type

MIN TYP MAX MAX MIN MAX TYP

A 230 285 340 500 550

A 480 600 720 1100 1200

1

A 800 1000 1200 1400 1500

1

A 880 1100 1320 1600 1700

1

A 960 1200 1440 1700 1800

1

A 1040 1300 1560 1800 1900

1

A 1200 1500 1800 1800 2000

1

A 1600 2000 2400 2500 2750

1

A 2000 2500 3000 3200 3500

1

A 2160 2700 3240 3600 4000

1

A 2400 3000 3600 4000 4200

1

A 2640 3300 3960 4600 4700

2

B 3200 4000 4800 5800 6000

2

B 3600 4500 5400 6150 6500

2

B 4000 5000 6000 7500 8000

2,7

B 4960 6200 7440 8100 9500

2,7

B 5200 6500 7800 9500 10000

2,6,7

B 6000 7500 9000 10000 10600

Impulse

Break-

down

in Volts

(@100V/μs)

Impulse

Break-

down In

Volts

(@1 Kv/μsec)

Insulation

Resistance

(at 100V)

(at 100V)

*ȍ

*ȍ

Capaci-

tance

(@1MHz)

<1.5 pf ~ 25 V

<1.5 pf ~ 25 V

Arc

Voltage

(on state

Voltage)

@1Amp Min

Follow

Current

Amps

Amps

Product Characteristics

Materials

Product Marking

Glow to arc
transition current

Glow Voltage

Storage and
Operational
Temperature

Max

On

200

200

Nominal

AC

Discharge

3

Current

(10x1sec

@50-60Hz)

5 A 65 A

N/A N/A

AC

Discharge

Current

(1 x 50Hz

9 cycles)

Nominal

Impulse

Discharge

Current4

(@8/20μs)

10 shots

5kA

10 shots

5kA

Core Outline A & B items:
Device: Tin Plated 17.5±12.5 Microns

Axial Outline A & B items:

Device & Wire: Tin Plated 17.5±12.5 Microns

LF Logo, Voltage and date code;
Black ink positive print

< 0.5Amps

~ 140 Volts

-40 to +90

Max

Surge

Current

(@8/20μs)

1 shot

10kA

1 shot

10kA

5

AC and CG3 Series

Revised: February 19, 2013

Specifications are subject to change without notice.

Customer should verify actual device performance in their specific applications.

Please refer to www.littelfuse.com for current information.

©2013 Littelfuse, Inc.

Gas Discharge Tube (GDT) Products

AC and CG3 Series

Soldering Parameters - Reflow Soldering (Surface Mount Devices)

Reflow Condition Pb – Free assembly

- Temperature Min (T

Pre Heat

- Temperature Max (T

- Time (Min to Max) (ts) 60 – 180 secs

Average ramp up rate (Liquidus Temp
(TL) to peak

T

to TL - Ramp-up Rate 5°C/second max

S(max)

Reflow

Peak Temperature (T

- Temperature (TL) (Liquidus) 217°C

- Temperature (t

) 60 – 150 seconds

L

) 260

P

Time within 5°C of actual peak
Temperature (t

)

p

Ramp-down Rate 6°C/second max

Time 25°C to peak Temperature (TP) 8 minutes Max.

Do not exceed 260°C

) 150°C

s(min)

) 200°C

s(max)

3°C/second max

+0/-5

°C

10 – 30 seconds

T

P

T

L

T

S(max)

T

S(min)

Temperature

25

Preheat

t

S

time to peak temperature

(t 25ºC to peak)

Ramp-up

t

P

Critical Zone

T

to T

L

P

t

L

Ramp-down

Time

Soldering Parameters - Wave Soldering (Thru-Hole Devices)

300

280

260

240

220

200

180

160

140

120

100

80

60

40

20

0

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

0

102030405060708090

Time (Seconds)

Preheat Time

100

110

120

130

140

150

160

170

180

190

200

210

220

230

Dwell Time

Cooling Time

Soldering Parameters - Hand Soldering

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

Recommended Process Parameters:

Wave Parameter Lead-Free Recommendation

Preheat:

(Depends on Flux Activation Temperature)

Temperature Minimum:

Temperature Maximum:

Preheat Time: 60-180 seconds

Solder Pot Temperature:

Solder Dwell Time: 2-5 seconds

240

(Typical Industry Recommendation)

100

° C

150

° C

° C Maximum

280

©2013 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.

AC and CG3 Series

Revised: February 19, 2013

Gas Discharge Tube (GDT) Products

AC and CG3 Series

Device Dimensions

Axial

PROFILE VIEW TOP VIEW

A

6.0 ± 0.2

[0.236 ± 0.008]

62 ± 2

[2.441 ± 0.079]

7.9 ± 0.3

[0.311 ± 0.012]

B

Core

PROFILE VIEW TOP VIEW

A

6.0 ± 0.2

[0.236 ± 0.008]

B

0.80 DIA. TYP.

[0.031]

0.80 DIA. TYP.

[0.031]

[0.314

[0.314

8.0 ± 0.2

[0.314

8.0 ± 0.2

[0.314

8.0 ± 0.2

± 0.008]

8.0 ± 0.2

± 0.008]

± 0.008]

± 0.008]

Part Numbering System and Ordering Information

Series

AC XXX XXX

AC Line Voltage

120 = 120V
240 = 240V

Lead / Packaging Option

= Core (no leads) / Bulk pack, 400 pcs per bag

L = Leaded / Bulk pack, 50 pcs per tray
LTR = Leaded / Tape & Reel, 500 pcs per reel

Series

CG3

Breakdown Voltage

1.0 = 1000V

1.1 = 1100V

1.2 = 1200V

1.3 = 1300V

1.5 = 1500V

2.0 = 2000V

2.5 = 2500V

2.7 = 2700V

3.0 = 3000V

3.3 = 3300V

4.0 = 4000V

4.5 = 4500V

5.0 = 5000V

6.2 = 6200V

6.5 = 6500V

7.5 = 7500V

Lead / Packaging Option

= Core (no leads) / Bulk pack, 400 pcs per bag

L = Leaded / Bulk pack, 50 pcs per tray
LTR = Leaded / Tape & Reel, 500 pcs per reel

Special Suffix Code

Enter this D004 special suffix code when placing orders
for CG36.2, CG36.5 and CG37.5 only

CG3 X.X XXX D004

7.9 ± 0.3

[0.311 ± 0.012]

Packaging Dimensions

For 'LTR' Option Code Axial Lead Items

<0.8 Max

52.4

[2.063]

22.8

[0.898]

6.4

[0.252]

5.0 Pitch

[0.197]

<1.2 Max. Lead Bend

80.0

[3.15]

254.0 - 356.0

[10.0 - 14.0]

Direction of Feed

AC and CG3 Series

Revised: February 19, 2013

Specifications are subject to change without notice.

©2013 Littelfuse, Inc.

Customer should verify actual device performance in their specific applications.

Please refer to www.littelfuse.com for current information.