LLDB3 / LLDB4

Bidirectional Diac

Features

Mechanical Data

The three layer, two terminal, axial lead,

hermetically sealed diacs are designed

specifically for triggering thyristors. They

demonstrate low breakover current at

breakover voltage as they withstand peak

pulse current, The breakover symmetry is

within three volts (DB3,DB4). These diacs

are intended for use in thyrisitors phase

control , circuits for lamp dimming,universa

motor speed control ,and heat control.

Case: MiniMELF Glass Case (SOD-80)

Polarity: Color band denotes cathode end

Mounting Position: Any

Weight: approx. 0.002 ounce, 0.05grams

Junction temperature

Storage temperature

125

-40~125

Parameter

Symbol

Value

Test Condition

Unit

A

mW

2

150

l=4mm, T

25 C

L

O

t = 20 s, f = 120Hz

p

m

Repetitive peak on-state current

Power dissipation

=25 C unless otherwise specified

amb

O

Parameter

Symbol

Test Condition

Max

Min

Typ.

Unit

DV

tr

V

V

V

V

V

mA

A

ms

Breakover voltage *

Breakover voltage symmetry

Dynamic breakover voltage *

Output voltage *

—

28

35

36

45

32

40

2

100

0.30

—

—

=25 C unless otherwise specified

amb

O

C = 22 nF **

C = 22 nF **

V

and V @ 10 mA

BO

F

Seediagram3(R=20 )

W

V = 0.5 V

max

RBO

Part

LLDB3

LLDB4

3

5

5

10

V-V

Breakover current *

Rise time *

C = 22 nF **

See diagram 2

Leakage current *

Peak current *

mA

Seediagram3(Gate)

* Applicable to both forward and reverse directions. ** Connected in parallel to the device.

10 mA

-V

+V

DV

90 %

10 %

220V

50Hz

D.U.T.

Rs=0

T410

Vo

R=20

W

10 k

W

500 k

W

0.1 F

m

Diagram 1:

Voltage -current characteristic curve

Diagram 2:

Rise time measurement

Diagram 3:

Test circuit

0.142 (3.6)

0.126 (3.2)

0.019 (0.48)

0.011 (0.28)

0.063 (1.6)

0.055 (1.4)

Glass Case MiniMELF

Dimensions in inches and (mm)

Email: info@olitech-elec.com

Website: www.olitech-elec.com

Page:P2-P1

OLITECH ELECTRONICS CO. LTD.