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

VB2B1=10V (2N4851)

0.56

0.75

VB2B1=10V (2N4852, 2N4853)

0.70

0.85

RBB

VB2B1=3.0V

4.7

9.1

kΩ

IEB2O

VB2E=30V (2N4851, 2N4852)

100

nA

IEB2O

VB2E=30V (2N4853)

50

nA

IV

VB2B1=20V, RB2=100Ω (2N4851)

2.0

mA

IV

VB2B1=20V, RB2=100Ω (2N4852)

4.0

mA

IV

VB2B1=20V, RB2=100Ω (2N4853)

6.0

mA

IP

VB2B1=25V (2N4851, 2N4852)

2.0

μA

IP

VB2B1=25V (2N4853)

0.4

μA

VOB1

V1=20V (2N4851)

3.0

V

VOB1

V1=20V (2N4852)

5.0

V

VOB1

V1=20V (2N4853)

6.0

V

TO-18 (UJT) CASE

R2 (13-December 2010)

www.centra lsemi.com