Gas Discharge Tube (GDT) Products

© 2013 Littelfuse, Inc.

Specifications are subject to change without notice.

Revised: 11/25/13

SG Series

Part

Number

Device Specifications(at25°C)

Life Ratings

DC Breakdown

in Volts

(@100V/s)

Impulse

Breakdown

in Volts

(@100V/µs)

Impulse

Breakdown

In Volts

(@1Kv/µsec)

Insulation

Resistance

Capaci-

tance

(@1MHz)

Arc

Voltage

(@1A)

Glow

to Arc

Transition

Current

Glow

Voltage

Nominal

AC

Discharge

Current

(x10@50Hz)

Nominal

Impulse

Discharge

Current

(x10@8/20µs)

Nominal

Impulse

Discharge

Current

(10/1000µs

100cycles)

MIN TYP MAX

MAX

MIN

MAX

SG75

52

75

98

500

650

>1GΩ

(at50VDC)

<1pf

~10V

~1.0 A

~60V

2 A

2kA

10 A

SG90

63

90

117

500

600

SG150

105 150 195

500

600

SG230

172 230 288

650

800

1kA

SG300

225 300 375

700

850

~12V

~0.5 A

~90V

SG300Q 210 300 390

580

650

~20V

~0.8 A

~140V

NA*

SG350

263 350 437

750

900

<0.8pf

~12V

~0.5 A

~90V

2 A

SG350Q 263 350 437

600

700

~140V

NA*

SG400

300 400 500

800

950

~90V

2 A

SG420

315 420 525

800

1000

<1pf

~10V

<1.0A

~60V

2 A

SG420Q 315 420 525

650

750

~20V

~140V

NA*

SG450Q 370 450 550

680

750

>1GΩ

(at

100VDC)

~20V

1 A

SG500Q 400 500 600

950

1050

<0.5pf

~16V

~0.1 A

2 A

SG600Q 450 600 750

1100

1200

<1pf

~20V

<0.5A

*Specificationisnotapplicableforquickresponse(SGxxxQ)versionofproduct

Product Characteristics

Materials

DeviceTinPlated17.5±12.5Microns

Construction Ceramic Insulator.

Storage and

Operational

Temperature

-40to+90°C

Electrical Characteristics

Time (ns)

0

200

400

600

800

1000

1200

Max dynamic breakover

voltage

Hold-over voltage

On-State voltage

Voltage vs.Time Characteristic

@1.0GHz=0.01dB

@1.4GHz=0.1dB

@1.8GHz=0.53dB

@2.1GHz=0.81dB

@2.45GHz=1dB

@2.8GHz=1.2dB

@3.1GHz=1.5dB

@3.5GHz=2.1dB

Typical Insertion Loss