©2011 Littelfuse, Inc.

Gas Discharge Tube (GDT) Products

64

Revised: September 26, 2011

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.

SG Series

SG Series

Part

Number

Device Specifications

Life Ratings

DC Breakdown

in Volts

Impulse

Breakdown

in Volts

Impulse

Breakdown

In Volts

Insulation

Resistance

Capaci-

tance

Arc

Voltage

Glow

to Arc

Transition

Current

Glow

Voltage

Nominal

AC

Discharge

Current

Nominal

Impulse

Discharge

Current

Nominal

Impulse

Discharge

Current

MIN

TYP MAX

MAX

MIN

MAX

SG75

52

75

98

500

650

(at 50VDC)

<1 pf

~10 V

~1.0 A

~60 V

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

~12 V

~0.5 A

~90 V

SG300Q 210 300 390

580

650

~20 V

~0.8 A

~140 V

NA*

SG350

263 350 437

750

900

<0.8 pf

~12 V

~0.5 A

~90 V

2 A

SG350Q 263 350 437

600

700

~140 V

NA*

SG400

300 400 500

800

950

~90 V

2 A

SG420

315 420 525

800

1000

<1 pf

~10 V

~1.0 A

~60 V

2 A

SG420Q 315 420 525

650

750

~20 V

~140 V

NA*

Q

Product Characteristics

Materials

Construction Ceramic Insulator.

Storage and

Operational

Temperature

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

Typical Insertion Loss