DB3 / DB4

SIGNAL BIDIRECTIONAL

DIAC

Features

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.

These diacs are intended for use in

thyristors phase control, circuits for lamp

dimming, universal motor speed control,

and heat control

DEC's DB3/DB4 are bi-directional trigged

diode designed to operate in conjunction

with Triacs and SCR's

Absolute Ratings (Limiting Values)

Electrical characteristics

Symbols

Value

Units

Power Dissipation on Printed

Circuit(L=10mm)

mW

150

Repetitive Peak on-state

Current

-40 to +125/-40 to 110

℃

Storage and Operating Junction Temperature

2.0

A

tp=10μs

F=100Hz

2.0

Parameters

DB3

DB4

Symbols

Value

Units

Breakover Voltage (Note 2)

V

5

Breakover Voltage Symmetry

±3

|

Dynamic Breakover Voltage (Note 1)

|±△V|

V

C=22nF(Note2)

See diagram 1

35

28

Parameters

DB3

DB4

Min

Typ

Max

40

32

45

36

Max

C=22nF(Note2)

See diagram 1

V

Test Conditions

See diagram 1

Min

5

Output Voltage (Note 1)

V

See diagram 2

Min

100

Breakover Current (Note 1)

μA

C=22nF(Note2)

Max

1.5

Rise Time (Note 1)

tr

μS

See diagram 3

Typ

10

Leakage Current (Note 1)

μA

see diagram 1

Max

Notes:

(1) Electrical characteristics applicable in both forward and reverse directions

(2) Connected in parallel with the devices

Dimensions in inches and (millimeters)

DO-35(GLASS)

1.083(27.5)

MIN.

1.083(27.5)

MIN.

0.154(3.9)

MAX.

0.020(0.52)

MAX.

DIA.

0.075(1.9)

MAX.

DIA.

R-1

0.787(20.0)

MIN.

0.787(20.0)

MIN.

0.126(3.2)

0.106(2.7)

0.025(0.65)

0.021(0.55)

DIA.

0.102(2.6)

0.091(2.3)

DIA.