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2N2646 Datasheet, PDF (1/2 Pages) Boca Semiconductor Corporation – Silicon PN Unijuction Transistor
DIGITRON SEMICONDUCTORS
2N2646, 2N2647
SILICON UNIJUNCTION TRANSISTOR
MAXIMUM RATINGS
Rating
Symbol
Value
Power dissipation(1)
PD
300
RMS emitter current
IE(EMS)
50
Peak pulse emitter current (2)
IE
2
Emitter reverse voltage
VB2E
30
Interbase voltage
VB2B1
35
Operating junction temperature range
TJ
-65 to 125
Storage temperature range
Tstg
-65 to 150
Note 1: Derate 3mW/°C increase in ambient temperature. The total power dissipation must be limited by the external circuitry.
Note 2: Capacitor discharge – 10µF or less, 30 volts or less.
Unit
mW
mA
Amps
Volts
Volts
°C
°C
ELECTRICAL CHARACTERISTICS (TA = 25°C unless otherwise specified)
Parameter
Symbol
Min
Typ
Max
Intrinsic standoff ration
(VB2B1 = 10V) (1)
2N2646
2N2647
Interbase resistance
(VB2B1 = 3V, IE = 0)
Interbase resistance temperature coefficient
(VB2B1 = 3V, IE = 0, TA = -55° to 125°C)
Emitter saturation voltage
(VB2B1 = 10V, IE = 50mA)(2)
Modulated interbase current
(VB2B1 = 10V, IE = 50mA)
Emitter reverse current
(VB2E = 30V, IB1 = 0)
2N2646
2N2647
η
rBB
αrBB
VEB1(sat)
IB2(mod)
IEB2O
0.56
-
0.75
0.68
-
0.82
4.7
7
9.1
0.1
-
0.9
-
3.5
-
-
15
-
-
0.005 12
-
0.005 0.2
Peak point emitter current
(VB2B1 = 25V)
2N2646
IP
2N2647
-
1
5
-
1
2
Valley point current
(VB2B1 = 20V, RB2 = 100ohms)(2)
2N2646
2N2647
IV
4
6
-
8
10
18
Base-one peak pulse voltage(3)
2N2646
2N2647
VOB1
3
5
-
6
7
-
Note 1: Intrinsic standoff voltage: η = VP-VF/VB2B1, where VP = peak point emitter voltage , VB2B1 = interbase voltage, VF = emitter to base one junction diode drop
(≈ 0.45V @ 10µA).
Note 2: PW ≈ 300µs, duty cycle ≤ 2% to avoid internal heating due to interbase modulation which may result in erroneous readings
Note 3: Base one peak pulse voltage is used to ensure minimum pulse amplitude for applications in SCR firing circuits and other types of pulse circuits.
Unit
-
kohms
%/°C
Volts
mA
µA
µA
mA
volts
144 Market Street
Kenilworth NJ 07033 USA
phone +1.908.245-7200
fax +1.908.245-0555
sales@digitroncorp.com
www.digitroncorp.com
Rev. 20121019
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