Littelfuse SG Series - Manual (Page 2)

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 (at 25°C) Life Ratings
DC Breakdown
in Volts
(@100V/s)
Impulse
Breakdown
in Volts
(@100V/µs)
Impulse
Breakdown
In Volts
(@1 Kv/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
100 cycles) MIN TYP MAX MAX MIN MAX
SG75 52 75 98 500 650
>1GΩ
(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*
SG450Q 370 450 550 680 750
>1GΩ
(at
100VDC)
~20 V 1 A
SG500Q 400 500 600 950 1050 <0.5 pf ~16 V ~0.1 A
2 A
SG600Q 450 600 750 1100 1200 <1 pf ~20 V <0.5 A
* Specification is not applicable for quick response (SGxxxQ) version of product
Product Characteristics
Materials
Device Tin Plated 17.5±12.5 Microns
Construction Ceramic Insulator.
Storage and
Operational
Temperature
-40 to +90 °C
Electrical Characteristics
V
oltage
(V)
Time (ns)
0 200 400 600 800 1000 1200
Max dynamic breakover
voltage
Hold-over voltage
On-State voltage
Voltage vs. Time Characteristic
@ 1.0 GHz = 0.01 dB
@ 1.4GHz = 0.1 dB
@ 1.8 GHz = 0.53 dB
@ 2.1 GHz = 0.81 dB
@ 2.45 GHz= 1 dB
@ 2.8 GHz = 1.2 dB
@ 3.1 GHz = 1.5 dB
@ 3.5 GHz = 2.1 dB
Typical Insertion Loss