Teccor
®
brand Thyristors
Standard Bidirectional SIDACs
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
to 330V
Applications
Suitable for high voltage power supplies, natural gas
igniters, high-pressure Sodium lamps, and Xenon flash
ignition.
Electrical Specifications
(T
J
= 25°C, unless otherwise specified)
Symbol
Parameters
Test Conditions
K0900y
K1050y
K1100y
K1200y
K1300y
K1400y
V
BO
Breakover/Trigger Voltage
K1500y
K1800y
K200zy
K220zy
K240zy
K250zy
K300zy
K0900y
K1050y
K1100y
K1200y
K1300y
K1400y
V
DRM
Repetitive Peak Off-state Voltage
K1500y
K1800y
K200zy
K220zy
K240zy
K250zy
K300zy
Note: xxx = voltage, z = circuit function, y = package
Kxxxzy Series
339
©2013 Littelfuse, Inc
Specifications are subject to change without notice.
Revised: 09/23/13
Min
79
95
104
110
120
130
140
165
190
205
220
240
270
70
90
90
90
90
90
90
140
180
180
190
200
200
Max
97
113
118
125
138
146
170
195
215
230
250
280
330
Unit
V
V
Teccor
®
brand Thyristors
Standard Bidirectional SIDACs
Electrical Specifications
(T
J
= 25°C, unless otherwise specified)
Symbol
I
T(RMS)
I
DRM
V
TM
I
H
Parameters
On-state RMS Current
Repetitive Peak Off-state Current
Peak On-state Voltage
Dynamic Holding Current
(V
BO
)
S
Switching Resistance, R
S
= ________
(I
S BO
)
Breakover Current
Peak Repetitive Pulse Current (refer to figure 4)
Peak Non-repetitive Surge Current
(refer to figure 5)
Critical Rate of Rise of On-state Current
Critical Rate of Rise of Off-state Voltage
Storage Temperature Range
Junction Temperature Range
Thermal Resistance, Junction to Lead
Thermal Resistance, Junction to Case
Thermal Resistance, Junction to Ambient
DO-15
DO-214 (1)
TO-92
DO-15
TO-92
1500
-40
-40
150
125
18
30
35
75
95
Test Conditions
50/60Hz, T
J
< 125°C
V = V
DRM
50/60Hz Sine Wave
I
T
= 1A
Kxxx0y
Kxxx2y
Min
Max
1
5
1.5
3.0
150
Unit
A
μA
V
mA
R
L
= 100Ω
50/60Hz Sine Wave
R
S
I
BO
I
TRM
I
TSM
di/dt
dv/dt
T
S
T
J
R
JL
R
TJC
R
TJA
50/60Hz Sine Wave
100
:
10
80
160
20
16.7
150
μA
A
A
A/μs
V/μs
°C
°C
°C/W
°C/W
°C/W
50/60Hz Sine Wave
t
p
= 10μs
Single Cycle
60Hz
5Hz
60Hz
50Hz
Notes: xxx = voltage, z = circuit function, y = package
(1) Mounted on 1 cm
2
copper foil surface; two-ounce copper foil
Kxxxzy Series
340
©2013 Littelfuse, Inc
Specifications are subject to change without notice.
Revised: 09/23/13
Teccor
®
brand Thyristors
Standard Bidirectional SIDACs
Figure 1: V-I Characteristics
+I
I
T
I
H
I
S
I
DRM
I
BO
+V
V
BO
R
S
Figure 2: On-state Current vs. On-state
Voltage (Typical)
9
nstantaneous On-state Current (i
T
) – Amps
T
J
= 25°C
8
7
6
5
4
3
2
1
0
0.6
1.0
1.4
1.8
2.2
2.6
3.0
3.4
3.8
Kxxx0G
Kxxx0E
Kxxx0S
Kxxx2G
-V
R
S =
(V
BO
- V
S
)
(I
S
- I
BO
)
V
T
V
S
V
DRM
Instantaneous On-state Voltage (v
T
) – Volts
-I
Figure 3: Power Dissipation vs. On-state Current
(Typical)
2.4
2.2
Figure 4: Repetitive Peak On-state Current (I
TRM
)
vs. Pulse Width at Various Frequencies
Repetitive Peak On-State Current (I
TRM
) - Amps
Average On-State Power Dissipation
[P
D(AV)
] - Watts
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0.0
CURRENT WAVEFORM: Sinusoidal
LOAD: Resistive or Inductive
CONDUCTION ANGLE:
See Basic SIDAC Circuit in Figure 12
1000
di/dt Limit Line
I
TM
t
O
1/f
100
120 Hz
1 kHz
60 Hz
5
Hz
Kxxx2G
Kxxx0G
Kxxx0E
Kxxx0S
5
kHz
10
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1
1.0
10.0
100.0
1000.0
RMS On-State Current [I
T(RMS)
] - Amps
Pulse Base Width (t
O
) - us
Figure 5: Peak Non-repetitive Surge Current (I
TSM
)
vs. Number of Cycles
100
SUPPLY FREQUENCY: 60 Hz Sinusoidal
LOAD: Resistive
RMS ON-STATE CURRENT: I
T
RMS Maximum Rated
Value at Specified Junction Temperature
Figure 6: Normalized V
BO
Change vs. Junction
Temperature
4%
2%
0%
Kxxx2G
K1xx0E
K1xx0G
K1xx0S
K2xx0E
K2xx0G
K2xx0S
Peak Surge (Non-repetitive)
On-state Current (I
TSM
) – Amps
V
BO
Change -- %
Notes:
1) Blocking capability may be lost during
and immediately following surge
current interval.
2) Overload may not be repeated until
junction temperature has returned
to steady-state rated value.
-2%
-4%
-6%
-8%
10
-10%
-12%
-40
1
1
10
100
1000
-20
0
20
40
60
80
100
120
140
Surge Current Duration -- Full Cycles
Junction Temperature (T
J
) -- °C
Kxxxzy Series
341
©2013 Littelfuse, Inc
Specifications are subject to change without notice.
Revised: 09/23/13
Teccor
®
brand Thyristors
Standard Bidirectional SIDACs
Figure 7: Normalized DC Holding Current
vs. Junction Temperature
2.0
Figure 8: Maximum Allowable Case Temperature
vs. RMS On-State Current
130
Maximum Allowable Lead/Case Temperature
(T
C
) - °C
120
Kxxx0G
Ratio of I
H
/ I
H
(T
J
= 25°C)
1.5
110
1.0
100
Kxxx0S
Kxxx0E
Kxxx2G
0.5
90
CURRENT WAVEFORM: Sinusoidal - 60Hz
LOAD: Resistive or Inductive
80
0.0
0.2
0.4
0.6
0.8
1.0
1.2
0.0
-40
-15
10
35
60
85
110
125
Junction Temperature (T
J
) -- °C
RMS On-State Current [I
T(RMS)
] - Amps
Figure 9: Maximum Allowable Ambient Temperature vs.
RMS On-State Current
140
Figure 10: Normalized Repetitive Peak Breakover
Current (I
BO
) vs. Junction Temperature
10
Maximum Allowable Ambient Temperature
(T
A
) - °C
120
100
80
Kxxx0G
60
Kxxx0S
Kxxx0E
40
25
20
0.0
0.2
Kxxx2G
Repetitive Peak Breakover
Current (I
BO
) Multiplier
1
20
CURRENT WAVEFORM: Sinusoidal - 60Hz
LOAD: Resistive or Inductive
FREE AIR RATING
0.4
0.6
0.8
1.0
30
40
50
60
70
80
90
100
110
120
130
RMS On-State Current [I
T(RMS)
] - Amps
Junction Temperature (T
J
) -- °C
Figure 11: Dynamic Holding Current Test Circuit for
SIDACs
Push to test
Switch to test
in each direction
Figure 12: Basic SIDAC Circuit
S1
100-250 V ac
60 Hz
100 Ω
1%
Device
Under
Test
100-250 Vac
60 Hz
V
BO
V
BO
V
BO
S1
Scope
I
H
Load
I
H
120-145
Conduction
Angle
I
PK
Trace Stops
˚
I
H
Load Current
I
H
Scope Indication
Kxxxzy Series
342
©2013 Littelfuse, Inc
Specifications are subject to change without notice.
Revised: 09/23/13
Teccor
®
brand Thyristors
Standard Bidirectional SIDACs
Figure 13: Relaxation Oscillator Using a SIDAC
Figure 14: Low-voltage Input Circuit for Gas Ignition
4.7 μF
(a) Circuit
10 μF
VBO
R
SIDAC
VDC(IN) ≥ VB0
V
C
t
RL
IL
VC
(b) Waveforms
100 V
-
+
4.7 k
-
50
V
+
½W
+
-
24 V ac
60 Hz
K1200E
Sidac
200 V
4.7 μF
100 V
1.2 μF
C
IL
R
max
≤
VIN - VBO
I
BO
VIN - VTM
I
H (MIN)
t
R min≥
H.V.
Ignitor
Figure 15: Comparison of SIDAC versus SCR for Gas
Ignitor Circuit
Figure 16: Xenon Lamp Flashing Circuit
100
SCR
Sidac
2W
-
10 μF
+
Xenon Lamp
250 V
K2200G
20 M
100-250 V ac
60 Hz
100-250 V ac
60 Hz
+
10 μF
-
450 V
120 V ac
60 Hz
4 kV
Sidac
200-
400 V
Trigger
Transformer
20:1
0.01 μF
400 V
Figure 17: Typical High-pressure Sodium Lamp Firing Circuit
Ballast
Ballast
Sidac
3.3 k
0.47 μF
400 V
Lamp
Sidac
7.5 k
0.22 μF
Lamp
120 V ac
60 Hz
16 mH
220 V ac
60 Hz
120 V ac
220 V ac
Kxxxzy Series
343
©2013 Littelfuse, Inc
Specifications are subject to change without notice.
Revised: 09/23/13