2N4870
2N4871
SILICON
PN UNIJUNCTION TRANSISTORS
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DESCRIPTION:
The CENTRAL SEMICONDUCTOR 2N4870 and
2N4871 are silicon PN unijunction transistors designed
for oscillator, triggering and timing applications.
MARKING: FULL PART NUMBER
TO-92 CASE
MAXIMUM RATINGS:
(TA=25°C)
Emitter Reverse Voltage
Interbase Voltage
RMS Emitter Current
Peak Emitter Current (Duty Cycle ≤1%, PRR=10pps)
RMS Power Dissipation
Operating Junction Temperature
Storage Temperature
ELECTRICAL CHARACTERISTICS:
(TA=25°C)
SYMBOL
TEST CONDITIONS
VB2B1=10V
RBB
VB2B1=3.0V
IEB2O
IV
IP
VOB1
VB2E=30V
VB2B1=20V, RB2=100Ω
VB2B1=25V
V1=20V
SYMBOL
VB2E
VB2B1
Ie
ie
PD
TJ
Tstg
2N4870
MIN
MAX
0.56
0.75
4.0
-
2.0
-
3.0
9.1
1.0
-
5.0
-
UNITS
V
V
A
A
mW
°C
°C
30
35
1.5
1.0
300
-65 to +125
-65 to +150
2N4871
MIN
MAX
0.70
0.85
4.0
-
4.0
-
5.0
9.1
1.0
-
5.0
-
UNITS
kΩ
μA
mA
μA
V
R1 (23-April 2013)
2N4870
2N4871
SILICON
PN UNIJUNCTION TRANSISTORS
TO-92 CASE - MECHANICAL OUTLINE
LEAD CODE:
1) Base 1
2) Emitter
3) Base 2
MARKING:
FULL PART NUMBER
R1 (23-April 2013)
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nd
day air)
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REQUESTING PRODUCT PLATING
1.
2.
If requesting Tin/Lead plated devices, add the suffix “ TIN/LEAD” to the part number when
ordering (example: 2N2222A TIN/LEAD).
If requesting Lead (Pb) Free plated devices, add the suffix “ PBFREE” to the part number
when ordering (example: 2N2222A PBFREE).
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