INCH-POUND
MIL-PRF-1/1428G
16 July 2004
SUPERSEDING
MIL-PRF-1/1428F
18 June 1999
PERFORMANCE SPECIFICATION SHEET
ELECTRON TUBE, THYRATRON
TYPE 7621
This specification is approved for use by all Depart-
ments and Agencies of the Department of Defense.
The requirements for acquiring the electron tube described herein
shall consist of this document and the latest issue of MIL-PRF-1.
DESCRIPTION:
Triode, hydrogen, ceramic-metal.
See figure 1.
Mounting position: Any.
W eight: 2 ounces (56.7 grams) nominal.
ABSOLUTE RATINGS:
Parameter:
Ef
epy
epx
Ebb
Ip
egy
ib
Ib
tk
Unit:
V ac
kv
kv
V dc
A ac
v
a
mA dc
sec
8 1/
8 2/
--- 1/
Maximum:
---
90
2
100
6.8
---
---
5% epy
175
300
---
Minimum:
---
---
90
5.8
Test conditions:
5.8
8
---
---
---
130
---
---
90
ABSOLUTE RATINGS:
Parameter:
Pb
TA
dik/dt
prr
Cooling
tj
Ecc
Unit:
---
---
---
V dc
°C
a/µs
µs
--- 4/
Maximum:
0.010
+125
---
1,000
---
2.7 x 109
---
---
Minimum:
-65
0
---
---
---
Test conditions:
---
Ambient
---
4,000
---
---
0
See footnotes at end of table I.
_______________________________________________
GENERAL:
Qualification - Required.
AMSC N/A
FSC 5960
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