TII Gas Tubes

73 & 74 SERIES 3-ELECTRODE HEAVY DUTY


73 Model

 


74 Model



MODEL NUMBER MATRIX

1 2 3 4, 5, 6, 7
7X XXX XX XXXX


1. Leads
3 = With Leads
4 = No Leads

2. Voltage Breakdown
400 (300-500 volts)
300(240-360 volts)
200 (160-240 volts)

3. Failsafe
NF = No Failsafe
FS = Failsafe Only
FV = Failsafe and Ventsafe

4. Number of Leads
0 = No Leads
1 = Ground Lead Only
2 = Three Leads
5. Lead Diameter
0 = No Leads
1 = .039"
2 = .050"
3 = .062"

6. Lead Length
0 = No Leads
1 = .250"
2 = .500"

7. Service Life
A = CCITT (8/20 10 Ka Rating)


SPECIFICATIONS


Model Number 73-090 73-400
74-400
73-300
74-300
73-200
73-200
DC Breakdown Voltage 75-120 300-500 240-360 180-240
Single Impulse Discharge Current 20 kA, 10 kA/Side 20 kA, 10 kA/Side 20 kA, 10 kA/Side 20 kA, 10 kA/Side
AC Discharge Current 11 Cycles N/A N/A N/A N/A
Impulse Breakdown Voltage 0.35 kV 0.65kV, 0.7kV 0.65kV, 0.7kV 0.65kV, 0.7kV
Impulse Breakdown Waveform v/Ásec 100 V 100V, 1 kV 100V, 1 kV 100V, 1 kV
Holdover Voltage @200mA 150 V 150 V 150 V 150 V
Impulse Life 500A @10/1000 400 times 400 times, 500A/Side 400 times, 500A/Side 400 times, 500A/Side
Capacitance 2 pF 2 pF (10pF with F/S) 2 pF (10pF with F/S) 2 pF (10pF with F/S)
DC Arc Voltage 30 V 30 V 30 V 30 V
Glow to Arc Transition Current 1 A 1 A 1 A 1 A


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