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MU4891 Datasheet, PDF (1/2 Pages) Digitron Semiconductors – SILICON UNIJUNCTION TRANSISTOR
DIGITRON SEMICONDUCTORS
MU4891-MU4894
SILICON UNIJUNCTION TRANSISTOR
MAXIMUM RATINGS
Rating
Symbol
Value
Power dissipation(1)
PD
300
RMS emitter current
Peak pulse emitter current (2)
IE
50
iE
1.0
Emitter reverse voltage
VB2E
30
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.
VB2B1 = √(RBB · PD)
Note 2: Capacitance discharge must fall to 0.37 Amp within 3.0ms and PRR ≤ 10PPS.
Unit
mW
mA
Amps
Volts
°C
ELECTRICAL CHARACTERISTICS (TA = 25°C unless otherwise specified)
Parameter
Symbol
Min
Typ
Max
Intrinsic standoff ratio
(VB2B1 = 10V) (1)
MU4892
η
MU4891, MU4893
MU4894
0.51
-
0.69
0.55
-
0.82
0.74
-
0.86
Interbase resistance
(VB2B1 = 3V, IE = 0)
MU4891, MU4892
RBB
MU4893, MU4894
4.0
7.0
9.1
4.0
7.0
12.0
Interbase resistance temperature coefficient
(VB2B1 = 3V, IE = 0, TA = -65° to 100°C)
Emitter saturation voltage
(VB2B1 = 10V, IE = 50mA)(2)
αRBB
VEB1(sat)
0.1
-
0.9
-
2.5
4.0
Modulated interbase current
(VB2B1 = 10V, IE = 50mA)
Emitter reverse current
(VB2E = 30V, IB1 = 0)
IB2(mod)
IEB2O
10
15
-
-
5.0
10
Peak point emitter current
(VB2B1 = 25V)
MU4891
MU4892, MU4893
IP
MU4894
-
0.6
5.0
-
0.6
2.0
-
0.6
1.0
Valley point current
(VB2B1 = 20V, RB2 = 100ohms)(2)
MU4891, MU4893, MU4894
IV
MU4892
2.0
4.0
-
2.0
3.0
-
Base-one peak pulse voltage(3)
Figure 3
MU4891, MU4892, MU4894
MU4893
VOB1
3.0
5.0
-
6.0
8.0
-
Note 1: Intrinsic standoff ratio: η = (VP-VEB1)/VB2B1, where VP = peak point emitter voltage , VB2B1 = interbase voltage, VEB1 = emitter to base one junction diode drop
(≈ 0.5V @ 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
-
kΩ
%/°C
Volts
mA
nA
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. 20121009
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