Unijunction Transistors

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Intrinsic Standoff Ratio Min









Intrinsic Standoff Ratio Max








Interbase Resistance Min
(KOHMS)




Interbase Resistance Max
(KOHMS)





Min Valley Point Current
(mA)





Package



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Part
Number
Descriptive Datasheet
Power Rating
PD
mW
Intrinsic Standoff Ratio Min
η
 
Intrinsic Standoff Ratio Max
η
 
Interbase Resistance Min
ΓBB
KOHMS
Interbase Resistance Max
ΓBB
KOHMS
Max Emitter Reverse Current
IEB20
μA
Emitter Reverse Current Voltage
VB2E
VOLTS
Max Peak Point Emitter Current
IP
μA
Min Valley Point Current
IV
mA
Min Base One Peak Pulse Voltage
VOB1
VOLTS
Package Available
Lead
Finish
Notes
2N489
Unijuction Transistor 450 0.51 0.62 4.7 6.8 2 30 12 8 n/a TO-5
Sn-Pb Pb-free
Notes
2N489A
Unijuction Transistor 450 0.51 0.62 4.7 6.8 2 30 12 8 3 TO-5
Sn/Pb Pb-free
Notes
2N489B
Unijuction Transistor 450 0.51 0.62 4.7 6.8 0.2 60 6 8 3 TO-5
Sn/Pb Pb-free
Notes
2N490
Unijuction Transistor 450 0.51 0.62 6.2 9.1 2 30 12 8 n/a TO-5
Sn/Pb Pb-free
Notes
2N490A
Unijuction Transistor 450 0.51 0.62 6.2 9.1 2 30 12 8 3 TO-5
Sn/Pb Pb-free
Notes
2N490B
Unijuction Transistor 450 0.51 0.62 6.2 9.1 0.2 60 6 8 3 TO-5
Sn/Pb Pb-free
Notes
2N490C
Unijuction Transistor 450 0.51 0.62 6.2 9.1 0.2 60 2 8 3 TO-5
Sn/Pb Pb-free
Notes
2N491
Unijuction Transistor 450 0.56 0.68 4.7 6.8 2 30 12 8 n/a TO-5
Sn/Pb Pb-free
Notes
2N491A
Unijuction Transistor 450 0.56 0.68 4.7 6.8 2 30 12 8 3 TO-5
Sn/Pb Pb-free
Notes
2N491B
Unijuction Transistor 450 0.56 0.68 4.7 6.8 0.2 60 6 8 3 TO-5
Sn/Pb Pb-free
Notes
2N492
Unijuction Transistor 450 0.56 0.68 6.2 9.1 2 30 12 8 n/a TO-5
Sn/Pb Pb-free
Notes
2N492A
Unijuction Transistor 450 0.56 0.68 6.2 9.1 2 30 12 8 3 TO-5
Sn/Pb Pb-free
Notes
2N492B
Unijuction Transistor 450 0.56 0.68 6.2 9.1 0.2 60 6 8 3 TO-5
Sn/Pb Pb-free
Notes
2N492C
Unijuction Transistor 450 0.56 0.68 6.2 9.1 0.2 60 2 8 3 TO-5
Sn/Pb Pb-free
Notes
2N493
Unijuction Transistor 450 0.62 0.75 4.7 6.8 2 30 12 8 n/a TO-5
Sn/Pb Pb-free
Notes
2N493A
Unijuction Transistor 450 0.62 0.75 4.7 6.8 2 30 12 8 3 TO-5
Sn/Pb Pb-free
Notes
2N493B
Unijuction Transistor 450 0.62 0.75 4.7 6.8 0.2 60 6 8 3 TO-5
Sn/Pb Pb-free
Notes
2N494
Unijuction Transistor 450 0.62 0.75 6.2 9.1 2 30 12 8 n/a TO-5
Sn/Pb Pb-free
Notes
2N494A
Unijuction Transistor 450 0.62 0.75 6.2 9.1 2 30 12 8 3 TO-5
Sn/Pb Pb-free
Notes
2N494B
Unijuction Transistor 450 0.62 0.75 6.2 9.1 0.2 60 6 8 3 TO-5
Sn/Pb Pb-free
Notes