2N4851
2N4852
2N4853
PN SILICON
UNIJUNCTION TRANSISTOR
DESCRIPTION:
The CENTRAL SEMICONDUCTOR 2N4851, 2N4852,
and 2N4853 are Silicon PN Unijunction Transistors
designed for timing, sensing, and trigger circuits.
MARKING: FULL PART NUMBER
MAXIMUM RATINGS: (TA=25°C) SYMBOL UNITS
Emitter Reverse Voltage VB2E 30 V
Interbase Voltage VB2B1 35 V
RMS Emitter Current Ie 50 mA
Peak Emitter Current (Duty Cycle ≤1%, PRR≤10pps) ie 1.5 A
RMS Power Dissipation PD 300 mW
Operating Junction Temperature TJ -65 to +125 °C
Storage Temperature Tstg -65 to +200 °C
ELECTRICAL CHARACTERISTICS: (TA=25°C unless otherwise noted)
SYMBOL TEST CONDITIONS MIN MAX UNITS
V
B2B1=10V (2N4851) 0.56 0.75
V
B2B1=10V (2N4852, 2N4853) 0.70 0.85
RBB V
B2B1=3.0V 4.7 9.1 kΩ
IEB2O V
B2E=30V (2N4851, 2N4852) 100 nA
IEB2O V
B2E=30V (2N4853) 50 nA
IV V
B2B1=20V, RB2=100Ω (2N4851) 2.0 mA
IV V
B2B1=20V, RB2=100Ω (2N4852) 4.0 mA
IV V
B2B1=20V, RB2=100Ω (2N4853) 6.0 mA
IP V
B2B1=25V (2N4851, 2N4852) 2.0 μA
IP V
B2B1=25V (2N4853) 0.4 μA
VOB1 V
1=20V (2N4851) 3.0 V
VOB1 V
1=20V (2N4852) 5.0 V
VOB1 V
1=20V (2N4853) 6.0 V
TO-18 (UJT) CASE
R2 (13-December 2010)
www.centralsemi.com
2N4851
2N4852
2N4853
PN SILICON
UNIJUNCTION TRANSISTOR
TO-18 (UJT) CASE - MECHANICAL OUTLINE
LEAD CODE:
1) Emitter
2) Base 1
3) Base 2
MARKING: FULL PART NUMBER
www.centralsemi.com
R2 (13-December 2010)
