2N5431.aspx?ext=

2N5431
PN UNIJUNCTION TRANSISTOR
High-reliability discrete products
and engineering services since 1977
FEATURES


Available as “HR” (high reliability) screened per MIL-PRF-19500, JANTX level. Add “HR” suffix to base part number.
Available as non-RoHS (Sn/Pb plating), standard, and as RoHS by adding “-PBF” suffix.
MAXIMUM RATINGS
Rating
Symbol
Value
Unit
PD
360
mW
Ie
50
mA
RMS power dissipation (1)
RMS emitter current
Peak pulse emitter current
(2)
Ie
1.5
Amp
Emitter reverse voltage
VB2E
30
Volts
Interbase voltage(3)
VB2B1
35
Volts
Operating junction temperature range
TJ
-65 to +125
°C
Storage temperature range
Tstg
-65 to +200
°C
1.
2.
3.
Derate 3 mW/°C increase in ambient temperature.
Duty cycle ≤ 1%, PRR = 10 PPS.
Based upon power dissipation at TA = 25°C.
ELECTRICAL CHARACTERISTICS (TA = 25°C unless otherwise specified)
Characteristic
Symbol
Min
Max
Unit
ŋ
0.72
0.80
-
Interbase resistance
(VB2B1 = 3V, IE = 0)
RBB
6
8.5
kΩ
Interbase resistance temperature coefficient
(VB2B1 = 3V, IE = 0, TA = 0 to 100°C)
αRBB
0.4
0.8
%/°C
Emitter saturation voltage (2)
(VB2B1 = 10V, IE = 50mA)
VEB1(sat)
-
3
Volts
Modulated interbase current
(VB2B1 = 10V, IE = 50mA)
IB2(mod)
5
30
mA
IEB2O
-
10
nA
Peak point emitter current
(VB2B1 = 25V)
(VB2B1 = 4V)
IP
-
0.4
4
µA
Valley point current (2)
(VB2B1 = 20V, RB2 = 100ohms)
IV
2
-
mA
Base one peak pulse voltage
(VBB = 4V)
VOB1
1
-
Volts
Intrinsic standoff ratio
(VB2B1 = 10V)
(1)
Emitter reverse current
(VB2E = 30V, IB1 = 0)
1.
2.
ŋ. Intrinsic standoff ratio is defined in terms of the peak point voltage, V P, by means of the equation: VP = ŋVB2B1 + VF, where VF is about 0.45V at 25°C @ IF =
10µA and decreases with temperature at about 2.5 mV/°C. Components R 1, C1 and the UJT form a relaxation oscillator, the remaining circuitry serves as a
peak voltage detector. The forward drop of diode D1 compensates for VF. To use, the “cal” button is pushed, and R3 is adjusted to make the current meter,
M1, read full scale. When the ”cal” button is released, the value of ŋ is read directly from the meter, if full scale on the meter reads 1.
PW = 300µs, duty cycle ≤ 2% to avoid internal heating, which may result erroneous readings.
Rev. 20121019
High-reliability discrete products
and engineering services since 1977
2N5431
PN UNIJUNCTION TRANSISTOR
MECHANICAL CHARACTERISTICS
Case:
TO-18
Marking:
Body painted, alpha-numeric
Pin out:
See below
Rev. 20121019
High-reliability discrete products
and engineering services since 1977
2N5431
PN UNIJUNCTION TRANSISTOR
Rev. 20121019