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Teccor® brand Thyristors
20 / 25 Amp Standard SCRs
Sxx20x & Sxx25x Series
Agency Approval
Agency
Agency File Number
L Package: E71639
Main Features
Symbol
IT(RMS)
VDRM/ VRRM
IGT
Value
20 & 25
400 to 1000
30 to 35
Additional Information
Unit
A
V
mA
RoHS
Description
Excellent unidirectional switches for phase control
applications such as heating and motor speed controls.
Standard phase control SCRs are triggered with few
milliamperes of current at less than 1.5V potential.
Features & Benefits
• RoHS compliant
• Glass – passivated
junctions
• Voltage capability up
to 1000 V
• Surge capability up to
350 A
Applications
Typical applications are AC solid-state switches, industrial
power tools, exercise equipment, white goods and
commercial appliances.
Internally constructed isolated packages are offered for
ease of heat sinking with highest isolation voltage.
Schematic Symbol
AK
G
Datasheet
Resources
Samples
Absolute Maximum Ratings — 20A SCR
Symbol
IT(RMS)
IT(AV)
Parameter
RMS on-state current
Average on-state current
ITSM Peak non-repetitive surge current
I2t
di/dt
IGM
PG(AV)
Tstg
TJ
I2t Value for fusing
Critical rate of rise of on-state current
Peak gate current
Average gate power dissipation
Storage temperature range
Operating junction temperature range
© 2016 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 06/14/16
Test Conditions
TC = 80°C
Sxx20x & Sxx20L
TC = 80°C
single half cycle; f = 50Hz;
TJ (initial) = 25°C
single half cycle; f = 60Hz;
TJ (initial) = 25°C
tp = 8.3 ms
f = 60Hz ; TJ = 125°C
TJ = 125°C
TJ = 125°C
Value
20
12.8
255
300
374
125
3
0.6
-40 to 150
-40 to 125
Unit
A
A
A
A2s
A/μs
A
W
°C
°C

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Teccor® brand Thyristors
20 / 25 Amp Standard SCRs
Absolute Maximum Ratings — 25A SCR
Symbol
IT(RMS)
Parameter
RMS on-state current
IT(AV) Average on-state current
ITSM
I2t
di/dt
IGM
PG(AV)
Tstg
TJ
Peak non-repetitive surge current
I2t Value for fusing
Critical rate of rise of on-state current
Peak gate current
Average gate power dissipation
Storage temperature range
Operating junction temperature range
Test Conditions
Sxx25L: TC=75°C
Sxx25R/Sxx25N: TC=100°C
Sxx25L
TC = 75°C
Sxx25R/Sxx25N
TC = 100°C
single half cycle; f = 50Hz;
TJ (initial) = 25°C
single half cycle; f = 60Hz;
TJ (initial) = 25°C
tp = 8.3 ms
f = 60Hz ; TJ = 125°C
TJ = 125°C
TJ = 125°C
Value
25
16
300
350
510
150
3.5
0.8
-40 to 150
-40 to 125
Unit
A
A
A
A2s
A/μs
A
W
°C
°C
Electrical Characteristics (TJ = 25°C, unless otherwise specified)
Symbol
Test Conditions
IGT VD = 12V RL = 30 Ω
VGT VD = 12V RL = 30 Ω
dv/dt
VD = VDRM; gate open; TJ = 100°C
VD = VDRM; gate open; TJ = 125°C
VGD VD = VDRM RL = 3.3 kΩ TJ = 125°C
IH IT = 400mA (initial)
tq (1)
tgt IG = 2 x IGT PW = 15µs IT = 40A
Note: xx = voltage, x = package
(1) IT=2A; tp=50μs; dv/dt=5V/μs; di/dt=-30A/μs
400V
600V
800V
1000V
400V
600V
800V
MAX.
MIN.
MAX.
MIN.
MIN.
MAX.
MAX.
TYP.
Value
Sxx20L
Sxx25x
30 35
11
1.5
450
425
400
200
350
325
300
0.2
40 50
35
2
Unit
mA
V
V/μs
V
mA
μs
μs
© 2016 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 06/14/16

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Teccor® brand Thyristors
20 / 25 Amp Standard SCRs
Static Characteristics
Symbol
VTM
IDRM / IRRM
Test Conditions
20A Device IT = 40A; tp = 380μs
25A Device IT = 50A; tp = 380μs
TJ = 25°C
VDRM / VRRM
TJ = 100°C
TJ = 125°C
400 – 600V
800 – 1000V
400 – 600V
800V
1000V
400 – 600V
800V
MAX.
MAX.
Value
1.6
10
20
500
1000
3000
1000
2000
Thermal Resistances
Symbol
Parameter
Rθ(J-C)
Junction to case (AC)
Rθ(J-A)
Note: xx = voltage
Junction to ambient
Sxx25R /
Sxx25N
Sxx20L/
Sxx25L
Sxx25R
Sxx20L
/ Sxx25L
Value
1.0
2.4
40
50
Unit
V
μA
Unit
°C/W
°C/W
Figure 1: N ormalized DC Gate Trigger Current
vs. Junction Temperature
2.0
1.5
1.0
0.5
0.0
-40
-15 10 35 60 85
Junction Temperature (TJ) – (ºC)
110 125
Figure 2: N ormalized DC Gate Trigger Voltage
vs. Junction Temperature
2.0
1.5
1.0
0.5
0.0
-40
-15 10 35 60 85
Junction Temperature (TJ) – (ºC)
110 125
© 2016 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 06/14/16

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Teccor® brand Thyristors
20 / 25 Amp Standard SCRs
Figure 3: Normalized DC Holding Current
vs. Junction Temperature
2.0
1.5
1.0
0.5
0.0
-40
-15 10 35 60 85
Junction Temperature (TJ) – (ºC)
110 125
Figure 5: Power Dissipation (Typical)
vs. RMS On-State Current
22
20
18
16
14
12
10
8
6
4
2
0
0
Sxx20L
Sxx25L
Sxx25R
Sxx25N
5 10 15 20
RMS On-State Current [IT(RMS)] - (Amps)
25
Figure 7: Maximum Allowable Case Temperature
vs. Average On-State Current
130
125
120
115
Sxx25R
Sxx25N
110
105
100
95 Sxx25L
90 Sxx20L
85
80 CURRENT WAVEFORM: Sinusoidal
75
LOAD: Resistive or Inductive
CONDUCTION ANGLE: 180°
70
0 2 4 6 8 10 12 14
Average On-State Current [IT(AVE)] - Amps
16
18
Figure 4: O n-State Current vs. On-State
Voltage (Typical)
90
T J = 25°C
80
70
60 Sxx25L
Sxx25R
50 Sxx25N
40
30
20 Sxx20L
10
0
0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4
Instantaneous On-state Voltage (vT) – Volts
1.5
1.6
Figure 6: M aximum Allowable Case Temperature
vs. RMS On-State Current
130
125
120
115
Sxx25R
Sxx25N
110
105
100
Sxx25L
95
90 Sxx20L
85
80
75
70
0
CURRENT WAVEFORM: Sinusoidal
LOAD: Resistive or Inductive
CONDUCTION ANGLE: 180°
5 10 15 20 25
RMS On-State Current [IT(RMS)] - Amps
30
Figure 8: Maximum Allowable Ambient Temperature
vs. RMS On-State Current
120
100
80
60
40
20
0
0.0
CURRENT WAVEFORM: Sinusoidal
LOAD: Resistive or Inductive
CONDUCTION ANGLE: 180°
FREE AIR RATING
Sxx20L
Sxx25L
Sxx25N
Sxx25R
0.5 1.0 1.5 2.0
RMS On-State Current [IT(RMS)] - Amps
2.5
© 2016 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 06/14/16

No Preview Available !

Teccor® brand Thyristors
20 / 25 Amp Standard SCRs
Figure 9: Maximum Allowable Ambient Temperature vs. Average On-State Current
120
CURRENT WAVEFORM: Sinusoidal
LOAD: Resistive or Inductive
100
CONDUCTION ANGLE: 180°
FREE AIR RATING
Sxx25L
80 Sxx25N
Sxx25R
60 Sxx20L
40
20
0
0.0 0.5 1.0
Average On-State Current [IT(AVE)] - Amps
Note: xx = voltage
Figure 10: Peak Capacitor Discharge Current
1.5
Figure 11: Peak Capacitor Discharge Current Derating
1000
Sxx25L
Sxx25R
Sxx25N
Sxx20L
100
ITRM
10
0.5
tW
1.0 10.0
Pulse Current Duration (tW) - ms
50.0
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0
25 50 75 100 125 150
Case Temperature (TC) - ºC
Figure 12: Surge Peak On-State Current vs. Number of Cycles
1000
Sxx25L
Sxx25R
Sxx25N
100
Sxx20L
SUPPLY FREQUENCY: 60 Hz Sinusoidal
LOAD: Resistive
RMS On-State Current: [IT(RMS)]: Maximum Rated Value
at Specified Case Temperature
Notes:
1. G ate control may be lost during and immediately
following surge current interval.
2. O verload may not be repeated until junction
temperature has returned to steady-state
rated value.
10
1 10 100
Surge Current Duration -- Full Cycles
© 2016 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 06/14/16
1000