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Thyratrons - Electron DevicesThyratrons

L3 Electron Devices produces a line of metal-ceramic hydrogen thyratrons. These devices feature switching voltages up to 100 kV, with switching currents up to 20,000 amps. They are used as switch tubes in a wide variety of applications, including radars, lasers, and linear accelerators.

 

 

Medical Thyratrons
Product
#
High Voltage
Gaps
Peak Anode
Voltage kV
Peak Anode
Current A
Avg
Anode
Current
ADC
Control
Grid
Drive
V/A
Cathode
Heater
VAC/AAC
Reservoir
Heater
VAC/AAC
Cross Reference Notes
L-4884B 1 16 325 0.25 200/0.4 6.3/11.5 - 8503, 5C22, 8613, CV-2520, CV-6022 5,9,14
L-4680 1 25 1000 1.25 600/1.2 6.3/14.5 6.3/6.0 CX-1180 2
L-4904 1 40 3000 3 600/1.2 6.3/22.0 5.0/4.0 CX-1154 2,4
L-4904A 1 36 2000 2 600/1.2 6.3/22.0 5.9/3 TX-1154 2,4
L-4935 2 50 2000 1.5 500/2.5 6.3/22.0 6.3/6.0 0207, F-207 1
Laser and Fast Switching Thyratrons
Prod
#
High
Volt
Gaps
Peak Anode
Voltage kV
Peak Anode
Current A
Avg
Anode
Current
ADC
Control
Grid
Drive
V/A
Cathode
Heater
VAC/AAC

Reservoir
Heater
VAC/AAC

Cross Reference

Notes

L-4189A 1 35 20,000 0.3 500/1.25 6.3/22 6.3/3 F-189, LP-189, LP-289 11
L-4915B 1 35 7,500 0.3 500/1.25 6.3/22 6.3/3 HY-3003, F-211, LT-340, F-340 11
L-4961 1 35 10,000 0.25 500/1.25 6.3/22 6.3/3 246 11
L-4902 1 33 2,400 4 1300/1.80 6.3/25 4.5/10 0117/F-117 2
L-4903 1 33 3,000 4 1300/1.80 6.3/25 4.5/10 0194/F-194 2,3
L-4945 2 50 10,000 1 200/0.10 6.3/18 6.3/3.0 F229, LS-3229, CX2608 1,2,11
L-4906A 1 35 20,000 0.3 500/1.25 6.3/18 6.3/3 F-205 7,11
Radar & General Purpose Thyratrons
Prod
#
EIA
#
App
Spec
Peak Anode
Current kV
Peak
Anode
Current
A
Avg
Anode
Current
ADC
Control
Grid
Drive
V/A
Cathode
Heater
VAC/AAC
Reservoir
Heater
VAC/AAC
Cross Reference Notes
L-4669 7782 MIL-PRF-1/1636 12 350 0.2 175/0.06 6.3/7.0 6.3/2.5 HY-6, KU-71 -
L-4668 7665A MIL-PRF-1/1485 16 350 0.5 200/0.20 6.3/8.0 6.3/4.0 HY-60,FX2522 -
L-4676 7665 MIL-PRF-1/1485 16 350 0.5 200/0.20 6.3/8.0 6.3/4.0 KU-72 -
L-4884 8613 MIL-PRF-1/1590 16 500 0.5 175/0.18 6.3/11.5 - HY-1A,FX2522 5,9
L-4884A - 5389078 16 500 0.5 175/0.18 6.3/11.5 - HY-1050 5,9
L-4958 7620 MIL-PRF-1/1612 20 500 0.5 200/0.20 6.3/7.5 6.3/4.0 HY-1ON, HY-14 -
L-4898 - - 20 500 0.5 175/0.18 6.3/7.5 6.3/4.0 HY-10R,0261,F261 -
L-4897 - - 20 500 0.5 175/0.18 6.3/7.5 6.3/4.0 HY-11T,0265/F-265,FX2541 -
L-4871 5949A MIL-PRF-1/1100 25 1000 1 500/1.25 6.3/22 4.5/5.0 F-150,FX-2519 5,10
L-4960 - - 25 1000 2 500/1.25 6.3/22 6.3/6.0 HY-3055 -
L-4885 7322 MIL-PRF-1/1371 25 1500 2.2 450/0.56 6.3/22 6.3/6.0 1802 6
L-4901 - - 30 2000 2 1100/7.30 6.3/25 4.5/10 CX1670A,0279 4
L-4886 7390 MIL-PRF-1/1361 33 2000 4 1100/7.30 6.3/25 4.5/10 - -
L-4886A - - 35 2000 4 1100/7.30 6.3/25 4.5/10 0281 -
L-4886B 8789 MIL-PRF-1/1658 33 2000 4 1100/7.30 6.3/25 4.5/10 - -
L-4886C 7667 - 33 2400 4 1300/9.30 6.3/25 4.5/10 7667,KU-274 -
L-4990 7890 9747588 40 2400 4 1300/260 6.3/25 4.5/10 7890 1,3
L-4883 8614 713090-18 40 5000 8 1300/6.50 6.3/30 4.5/11 HY-5 -
L-4883A - 7534252 40 5000 8 1300/6.50 6.3/30 4.5/1 HY-5G -
Accelerator Thyratrons
Product
#
High
Voltage Gaps
Peak Anode
Current kV
Peak
Anode
Current
A
Avg
Anode
Current
ADC
Control
Grid
Drive
V/A
Cathode
Heater
VAC/AAC
Reservoir
Heater
VAC/AAC
Cross
Reference
Notes
L-4913 2 70 3,000 3 200/0.1 6.3/25 5.0/7.05 CX1168 1,2,4
L-4963 3 90 3,000 3 1000/0.1 6.3/25 5.0/7.0 CX1171D 1,2,4,13
L-4938 1 35 15,000 12 1500/7.5 6.3/70 4.5/20 146 1, 2,4
L-4888 2 50 7,500 8 1500/7.5 6.3/70 4.5/20 0241, 8479, F-175, CX-1836, CX-1536 2,4
L-4174 1 33 2,000 3 1100/7.3 6.3/30 4.5/10 CX-1174 2,4
Crowbar Thyratron (klystron and IOT protection)
Product
#
High
Voltage Gaps
Anode Voltage kV Peak
Anode
Current
A
Coulomb
Transfer
per pulse
Coul.
Control Grid
Drive V/A
Cathode
Heater
VAC/AAC
Reservoir
Heater
VAC/AAC
Cross
Reference
Notes
L-4945A 2 40 1,500 7 800/0.6 6.3/22 6.3/3 CX-2708 1, 2,4
  1. Gradient grids, one or more
  2. Auxiliary (preionizing) grid
  3. Integral anode cooling chamber
  4. Shielded gap for x-ray attenuation
  5. Plug-in socket required
  6. MT-4 mounitng socket
  7. Grounded grid (triggered spark gap thyraton)
  8. High-ulse repetition rate design
  9. Reservoir heater and cathode heater internally connected in parallel
  10. Metal - ceramic version of glass design
  11. Ratings presuppose sub-microsecond pulse widths or single shot/crowbar service
  12. Long-grid ceramic to suppress external arc-over
  13. Oil for De-Qing operation

Notes: Unless otherwise indicated, these devices are flange-mounted single voltage gap triodes. Peak Current (ib) ratings can be appreciably higher for sub-microsecond pulse widths. The minumum open circuit control grid voltage and the minimum peak short circuit control grid current is specified. Cathode and reservoir heater voltages are nominal operating voltages. Cathode and reservoir heater currents are the maximum levels for the nominal voltage.