1

Revised: December 9, 2011 01:32 PM

©2011 Littelfuse, Inc

Specifications are subject to change without notice.

Please refer to http://www.littelfuse.com for current information.

Standard Bidirectional SIDACs

Kxxxzy Series

Kxxxzy SIDAC

Description

The SIDAC is a silicon bilateral voltage triggered switch.

Upon application of a voltage exceeding the SIDAC breakover

voltage point, the SIDAC switches on through a negative

resistance region to a low on-state voltage. Conduction

continues until the current is interrupted or drops below the

minimum holding current of the device.

SIDACs feature glass-passivated junctions to ensure a

rugged and dependable device capable of withstanding

harsh environments.

Features

Schematic Symbol

Applications

Suitable for high voltage power supplies, natural gas

igniters, high-pressure Sodium lamps, and Xenon flash

ignition.

• AC Circuit Oriented

• Triggering Voltage of 79V

to 330V

• RoHS Compliant

Symbol

Parameters

Test Conditions

Min

Max

Unit

V

BO

Breakover/Trigger Voltage

K0900y

79

97

V

K1050y

95

113

K1100y

104

118

K1200y

110

125

K1300y

120

138

K1400y

130

146

K1500y

140

170

K1800y

165

195

K200zy

190

215

K220zy

205

230

K240zy

220

250

K250zy

240

280

K300zy

270

330

V

DRM

Repetitive Peak Off-state Voltage

K0900y

70

V

K1050y

90

K1100y

90

K1200y

90

K1300y

90

K1400y

90

K1500y

90

K1800y

140

K200zy

180

K220zy

180

K240zy

190

K250zy

200

K300zy

200

Note: xxx = voltage, z = circuit function, y = package