Teccor® brand Thyristors
20 / 25 Amp Standard SCRs
Sxx20x & Sxx25x Series
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
Agency Approval
• Available in isolated
TO-220, non-isolated
TO-220 and TO-263
packages.
Applications
Agency
Typical applications are AC solid-state switches, industrial
power tools, exercise equipment, white goods and
commercial appliances.
Agency File Number
E71639*
* - L Package Only
Internally constructed isolated packages are offered for
ease of heat sinking with highest isolation voltage.
Main Features
Schematic Symbol
Symbol
Value
Unit
IT(RMS)
20 & 25
A
VDRM / VRRM
400 to 1000
V
IGT
30 to 35
mA
A
K
G
Additional Information
Datasheet
•S
urge capability up to
350 A
Resources
Samples
Absolute Maximum Ratings — 20A SCR
Symbol
Parameter
IT(RMS)
RMS on-state current
IT(AV)
Average on-state current
ITSM
Peak non-repetitive surge current
Test Conditions
TC = 80°C
Sxx20x & Sxx20L
TC = 80°C
Value
Unit
20
A
12.8
A
single half cycle; f = 50Hz;
TJ (initial) = 25°C
255
single half cycle; f = 60Hz;
TJ (initial) = 25°C
300
A
I2t
I2t Value for fusing
tp = 8.3 ms
374
A2s
di/dt
Critical rate of rise of on-state current
f = 60Hz ; TJ = 125°C
125
A/μs
IGM
Peak gate current
TJ = 125°C
3
A
PG(AV)
Average gate power dissipation
TJ = 125°C
0.6
W
Tstg
Storage temperature range
-40 to 150
°C
TJ
Operating junction temperature range
-40 to 125
°C
©2019 Littelfuse, Inc
Specifications are subject to change without notice.
Revised: BO.12/10/20
Teccor® brand Thyristors
20 / 25 Amp Standard SCRs
Absolute Maximum Ratings — 25A SCR
Symbol
Parameter
IT(RMS)
RMS on-state current
IT(AV)
Average on-state current
ITSM
Test Conditions
Value
Unit
25
A
16
A
Sxx25L: TC=75°C
Sxx25R/Sxx25N: TC=100°C
Sxx25L
TC = 75°C
Sxx25R/Sxx25N
TC = 100°C
Peak non-repetitive surge current
single half cycle; f = 50Hz;
TJ (initial) = 25°C
300
single half cycle; f = 60Hz;
TJ (initial) = 25°C
350
A
I2t
I2t Value for fusing
tp = 8.3 ms
510
A2s
di/dt
Critical rate of rise of on-state current
f = 60Hz ; TJ = 125°C
150
A/μs
IGM
Peak gate current
TJ = 125°C
3.5
A
PG(AV)
Average gate power dissipation
TJ = 125°C
0.8
W
Tstg
Storage temperature range
-40 to 150
°C
TJ
Operating junction temperature range
-40 to 125
°C
Electrical Characteristics (TJ = 25°C, unless otherwise specified)
Symbol
Value
Test Conditions
IGT
VD = 12V RL = 30 Ω
VGT
VD = 12V RL = 30 Ω
Sxx20L
Sxx25x
-
MAX.
30
35
-
MIN.
1
1
-
MAX.
1.5
400V
VD = VDRM; gate open; TJ = 100°C
425
800V
400
VGD
V
200
MIN.
400V
VD = VDRM; gate open; TJ = 125°C
mA
450
600V
1000V
dv/dt
Unit
V/μs
350
600V
325
800V
300
VD = VDRM RL = 3.3 kΩ TJ = 125°C
-
MIN.
IH
IT = 400mA (initial)
-
MAX.
0.2
tq
(1)
-
MAX.
35
μs
tgt
IG = 2 x IGT PW = 15µs IT = 40A
-
TYP.
2
μs
40
V
50
mA
Note: xx = voltage, x = package
(1) IT=2A; tp=50μs; dv/dt=5V/μs; di/dt=-30A/μs
©2019 Littelfuse, Inc
Specifications are subject to change without notice.
Revised: BO.12/10/20
Teccor® brand Thyristors
20 / 25 Amp Standard SCRs
Static Characteristics
Symbol
Test Conditions
20A Device IT = 40A; tp = 380μs
VTM
MAX.
25A Device IT = 50A; tp = 380μs
TJ = 25°C
VDRM / VRRM
TJ = 100°C
1.6
V
400 – 600V
10
20
500
MAX.
800V
μA
1000
1000V
TJ = 125°C
Unit
800 – 1000V
400 – 600V
IDRM / IRRM
Value
3000
400 – 600V
1000
800V
2000
Thermal Resistances
Symbol
Parameter
Rθ(J-C)
Value
Junction to case (AC)
Junction to ambient
Rθ(J-A)
Sxx25R /
Sxx25N
1.0
Sxx20L/
Sxx25L
2.4
Sxx25R
40
Sxx20L/
Sxx25L
50
Unit
°C/W
°C/W
Note: xx = voltage
Figure 1: Normalized DC Gate Trigger Current
vs. Junction Temperature
Figure 2: N
ormalized DC Gate Trigger Voltage
vs. Junction Temperature
2.0
Ratio of VGT / VGT (TJ = 25ºC)
Ratio of IGT / IGT (TJ = 25ºC)
2.0
1.5
1.0
0.5
0.0
-40
-15
10
35
60
Junction Temperature (TJ) – (ºC)
85
110
125
1.5
1.0
0.5
0.0
-40
-15
10
35
60
85
110
125
Junction Temperature (TJ) – (ºC)
©2019 Littelfuse, Inc
Specifications are subject to change without notice.
Revised: BO.12/10/20
Teccor® brand Thyristors
20 / 25 Amp Standard SCRs
Figure 3: Normalized DC Holding Current
vs. Junction Temperature
Figure 4: O
n-State Current vs. On-State
Voltage (Typical)
Intantaneous On-state Current (iT) – Amps
Ratio of IH / IH (TJ = 25ºC)
2.0
1.5
1.0
0.5
90
70
60
40
30
20
10
35
60
85
110
Sxx20L
10
0
-15
Sxx25L
Sxx25R
Sxx25N
50
0.0
-40
T J = 25°C
80
125
0.7
0.8
22
130
20
125
18
120
16
Sxx20L
12
10
8
Sxx25L
Sxx25R
Sxx25N
6
4
0
10
15
20
100
Sxx20L
90
85
CURRENT WAVEFORM: Sinusoidal
LOAD: Resistive or Inductive
CONDUCTION ANGLE: 180°
5
10
15
25
30
Figure 8: Maximum Allowable Ambient Temperature
vs. RMS On-State Current
Maximum Allowable Ambient
Temperature (TA) - ºC
120
Maximum Allowable Case
Temperature (TC) - °C
20
RMS On-State Current [IT(RMS)] - Amps
120
Sxx25R
Sxx25N
110
105
100
Sxx25L
Sxx20L
85
CURRENT WAVEFORM: Sinusoidal
LOAD: Resistive or Inductive
CONDUCTION ANGLE: 180°
75
1.6
Sxx25L
95
CURRENT WAVEFORM: Sinusoidal
LOAD: Resistive or Inductive
CONDUCTION ANGLE: 180°
FREE AIR RATING
125
80
1.5
105
0
130
90
1.4
70
25
Figure 7: Maximum Allowable Case Temperature
vs. Average On-State Current
95
1.3
110
RMS On-State Current [IT(RMS)] - (Amps)
115
1.2
Sxx25R
Sxx25N
75
5
1.1
115
80
2
0
1.0
Figure 6: M
aximum Allowable Case Temperature
vs. RMS On-State Current
Maximum Allowable Case
Temperature (TC) - °C
Average On-State Power Dissipation
[PD(AV)] - (Watts)
Figure 5: Power Dissipation (Typical)
vs. RMS On-State Current
14
0.9
Instantaneous On-state Voltage (vT) – Volts
Junction Temperature (TJ) – (ºC)
100
80
Sxx25L
Sxx25N
Sxx25R
60
Sxx20L
40
20
0
70
0
2
4
6
8
10
12
14
Average On-State Current [IT(AVE)] - Amps
16
18
0.0
0.5
1.0
1.5
2.0
2.5
RMS On-State Current [IT(RMS)] - Amps
©2019 Littelfuse, Inc
Specifications are subject to change without notice.
Revised: BO.12/10/20
Teccor® brand Thyristors
20 / 25 Amp Standard SCRs
Figure 9: Maximum Allowable Ambient Temperature vs. Average On-State Current
Maximum Allowable Ambient
Temperature (TA) - ºC
120
CURRENT WAVEFORM: Sinusoidal
LOAD: Resistive or Inductive
CONDUCTION ANGLE: 180°
FREE AIR RATING
100
Sxx25L
Sxx25N
Sxx25R
80
Sxx20L
60
40
20
0
0.0
0.5
1.5
1.0
Average On-State Current [IT(AVE)] - Amps
Note: xx = voltage
Figure 10: Peak Capacitor Discharge Current
Figure 11: Peak Capacitor Discharge Current Derating
1.2
Sxx25L
Sxx25R
Sxx25N
1.0
Normalized Peak Current
Peak Discharge Current (ITM) - Amps
1000
Sxx20L
100
ITRM
0.8
0.6
0.4
0.2
tW
0.0
10
0.5
50.0
10.0
1.0
0
Pulse Current Duration (tW) - ms
25
50
75
100
125
150
Case Temperature (TC) - ºC
Figure 12: Surge Peak On-State Current vs. Number of Cycles
Peak Surge (Non-repetitive)On-state
Current (ITSM) – Amps
1000
SUPPLY FREQUENCY: 60 Hz Sinusoidal
LOAD: Resistive
RMS On-State Current: [IT(RMS)]: Maximum Rated Value at
Specified Case Temperature
Sxx25L
Sxx25R
Sxx25N
100
Notes:
1. Gate control 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.
Sxx20L
10
1
10
100
1000
Surge Current Duration -- Full Cycles
©2019 Littelfuse, Inc
Specifications are subject to change without notice.
Revised: BO.12/10/20
Teccor® brand Thyristors
20 / 25 Amp Standard SCRs
Soldering Parameters
Pb – Free assembly
Pre Heat
- Temperature Min (Ts(min))
150°C
- Temperature Max (Ts(max))
200°C
- Time (min to max) (ts)
60 – 180 secs
Average ramp up rate (Liquidus Temp) (TL)
to peak
5°C/second max
TS(max) to TL - Ramp-up Rate
5°C/second max
Reflow
- Temperature (TL) (Liquidus)
- Temperature (tL)
217°C
60 – 150 seconds
Peak Temperature (TP)
260+0/-5 °C
Time within 5°C of actual peak Temperature
(tp)
20 – 40 seconds
Ramp-down Rate
5°C/second max
Time 25°C to peak Temperature (TP)
8 minutes Max.
Do not exceed
280°C
Physical Specifications
Terminal Finish
100% Matte Tin-plated
Body Material
UL recognized epoxy meeting flammability
classification 94V-0
Lead Material
Copper Alloy
tP
TP
Temperature
Reflow Condition
Ramp-up
TL
tL
TS(max)
Preheat
TS(min)
25
tS
time to peak temperature
Time
Environmental Specifications
Test
Specifications and Conditions
AC Blocking
MIL-STD-750, M-1040, Cond A Applied Peak AC
voltage @ 125°C for 1008 hours
Temperature Cycling
MIL-STD-750, M-1051,
100 cycles; -40°C to +150°C;
15-min dwell-time
Temperature/Humidity
EIA / JEDEC, JESD22-A101
1008 hours; 320V - DC: 85°C;
85% rel humidity
High Temp Storage
MIL-STD-750, M-1031,
1008 hours; 150°C
Low-Temp Storage
1008 hours; -40°C
Resistance to
Solder Heat
MIL-STD-750 Method 2031
Solderability
ANSI/J-STD-002, category 3, Test A
Lead Bend
MIL-STD-750, M-2036 Cond E
Design Considerations
Careful selection of the correct device for the application’s
operating parameters and environment will go a long way
toward extending the operating life of the Thyristor. Good
design practice should limit the maximum continuous
current through the main terminals to 75% of the device
rating. Other ways to ensure long life for a power discrete
semiconductor are proper heat sinking and selection of
voltage ratings for worst case conditions. Overheating,
overvoltage (including dv/dt), and surge currents are
the main killers of semiconductors. Correct mounting,
soldering, and forming of the leads also help protect
against component damage.
Ramp-do
Ramp-down
©2019 Littelfuse, Inc
Specifications are subject to change without notice.
Revised: BO.12/10/20
Teccor® brand Thyristors
20 / 25 Amp Standard SCRs
Dimensions — TO-220AB (R-Package) — Non-Isolated Mounting Tab Common with Center Lead
TC MEASURING POINT
AREA (REF.) 0.17 IN2
Dimension
O
A
E
8.13
.320
P
A
ANODE
B
C
13.36
.526
D
7.01
.276
NOTCH IN
GATE LEAD
TO ID.
NON-ISOLATED
TAB
F
R
G
L
H
CATHODE
ANODE GATE
K
N
Note: Maximum torque to
be applied to mounting tab
is 8 in-lbs. (0.904 Nm).
M
J
Inches
Millimeters
Min
Max
Min
Max
0.380
0.420
9.65
10.67
2.92
B
0.105
0.115
2.67
C
0.230
0.250
5.84
6.35
D
0.590
0.620
14.99
15.75
E
0.142
0.147
3.61
3.73
F
0.110
0.130
2.79
3.30
G
0.540
0.575
13.72
14.61
H
0.025
0.035
0.64
0.89
J
0.195
0.205
4.95
5.21
K
0.095
0.105
2.41
2.67
L
0.060
0.075
1.52
1.91
M
0.085
0.095
2.16
2.41
N
0.018
0.024
0.46
0.61
O
0.178
0.188
4.52
4.78
P
0.045
0.060
1.14
1.52
R
0.038
0.048
0.97
1.22
Min
Max
Min
Max
0.380
0.420
9.65
10.67
2.92
Dimensions — TO-220AB (L-Package) — Isolated Mounting Tab
TC MEASURING POINT
O
A
E
P
AREA (REF.) 0.17 IN2
Dimension
8.13
.320
A
Inches
Millimeters
B
0.105
0.115
2.67
C
0.230
0.250
5.84
6.35
D
0.590
0.620
14.99
15.75
E
0.142
0.147
3.61
3.73
F
0.110
0.130
2.79
3.30
G
0.540
0.575
13.72
14.61
H
0.025
0.035
0.64
0.89
J
0.195
0.205
4.95
5.21
K
0.095
0.105
2.41
2.67
L
L
0.060
0.075
1.52
1.91
H
M
0.085
0.095
2.16
2.41
N
0.018
0.024
0.46
0.61
O
0.178
0.188
4.52
4.78
P
0.045
0.060
1.14
1.52
R
0.038
0.048
0.97
1.22
B
C
13.36
.526
D
7.01
.276
F
R
G
CATHODE
ANODE GATE
K
J
N
M
Note: Maximum torque to
be applied to mounting tab
is 8 in-lbs. (0.904 Nm).
©2019 Littelfuse, Inc
Specifications are subject to change without notice.
Revised: BO.12/10/20
Teccor® brand Thyristors
20 / 25 Amp Standard SCRs
Dimensions –TO- 263AB (N-package) — D2-Pak Surface Mount
TC MEASURING POINT
B
AREA: 0.11 in 2
C
V
Dimension
E
ANODE
8.41
.331
7.01
.276
A
S
W
U
K
GATE
CATHODE
G
J
8.13
.320
H
D
F
11.68
.460
2.16
.085
7.01
.276
7.01
.276
16.89
.665
8.89
.350
Inches
Millimeters
Min
Max
Min
A
0.360
0.370
9.14
Max
9.40
B
0.380
0.420
9.65
10.67
C
0.178
0.188
4.52
4.78
D
0.025
0.035
0.64
0.89
E
0.045
0.060
1.14
1.52
F
0.060
0.075
1.52
1.91
G
0.095
0.105
2.41
2.67
H
0.092
0.102
2.34
2.59
J
0.018
0.024
0.46
0.61
K
0.090
0.110
2.29
2.79
S
0.590
0.625
14.99
15.88
V
0.035
0.045
0.89
1.14
U
0.002
0.010
0.05
0.25
W
0.040
0.070
1.016
1.78
1.40
.055
3.81
.150
2.03
.080
6.60
.260
Product Selector
Part Number
Voltage
400V
600V
800V
Gate Sensitivity
1000V
Type
Package
Sxx20L
X
X
X
X
30mA
Standard SCR
TO-220L
Sxx25L
X
X
X
X
35mA
Standard SCR
TO-220L
Sxx25R
X
X
X
X
35mA
Standard SCR
TO-220R
Sxx25N
X
X
X
X
35mA
Standard SCR
TO-263
Note: xx = Voltage
Packing Options
Part Number
Marking
Weight
Packing Mode
Base Quantity
Sxx20LTP
Sxx20L
2.2g
Tube
1000 (50 per tube)
1000 (50 per tube)
Sxx25LTP
Sxx25L
2.2g
Tube
Sxx25RTP
Sxx25R
2.2g
Tube
1000 (50 per tube)
Sxx25NTP
Sxx25N
1.6g
Tube
1000 (50 per tube)
Sxx25NRP
Sxx25N
1.6g
Embossed Carrier
500
Note: xx = Voltage
©2019 Littelfuse, Inc
Specifications are subject to change without notice.
Revised: BO.12/10/20
Teccor® brand Thyristors
20 / 25 Amp Standard SCRs
TO-263 Embossed Carrier Reel Pack (RP) Specifications
Meets all EIA-481-2 Standards
0.63
(16.0)
0.157
(4.0)
Gate
0.059
DIA
(1.5)
0.945
(24.0)
0.827
(21.0)
Cathode
*
* Cover tape
Anode
0.512 (13.0) Arbor
Hole Dia.
12.99
(330.0)
Dimensions
are in inches
(and millimeters).
1.01
(25.7)
Direction of Feed
Part Numbering System
S 60 20 L
DEVICE TYPE
S: SCR
VOLTAGE RATING
40: 400V
60: 600V
80: 800V
K0: 1000V
Part Marking System
56
TO-220 AB - (L and R Package)
TO-263 AB - (N Package)
LEAD FORM DIMENSIONS
xx: Lead Form Option
SENSITIVITY & TYPE
(blank): Sxx20L = 30mA
Sxx25x = 35mA
S6020R
YMXXX
®
CURRENT RATING
20: 20A
25: 25A
PACKAGE TYPE
L: TO-220 Isolated
R: TO-220 Non-Isolated
N: TO-263 (D2 -Pak)
Date Code Marking
Y:Year Code
M: Month Code
XXX: Lot Trace Code
Disclaimer Notice - Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own applications. Littelfuse products are
not designed for, and may not be used in, all applications. Read complete Disclaimer Notice at http://www.littelfuse.com/disclaimer-electronics.
©2019 Littelfuse, Inc
Specifications are subject to change without notice.
Revised: BO.12/10/20
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