265
©2008 Littelfuse, Inc.
Revised: July 9, 2008
Teccor® brand Thyristors
Specifications are subject to change without notice.
Please refer to http://www.littelfuse.com for current information.
Sxx20x & Sxx25x Series
20 / 25 Amp Standard SCRs
Specifications are subject to change without notice.
Please refer to http://www.littelfuse.com for current information.
20/25 A SCRs
Sxx20x & Sxx25x Series
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
t3P)4DPNQMJBOU
t(MBTToQBTTJWBUFE
junctions
t7PMUBHFDBQBCJMJUZVQ
to 1000 V
t4VSHFDBQBCJMJUZVQUP
350 A
Schematic Symbol
Main Features
Symbol Value Unit
IT(RMS) 20 & 25 A
VDRM /VRRM 400 to 1000 V
IGT 30 to 35 mA
Absolute Maximum Ratings — 20A SCR
Symbol Parameter Test Conditions Value Unit
IT(RMS) RMS on-state current TC = 80°C 20 A
ITSM Peak non-repetitive surge current
single half cycle; f = 50Hz;
T
J (initial) = 25°C 255
A
single half cycle; f = 60Hz;
T
J (initial) = 25°C 300
I2tI
2t Value for fusing tp = 8.3 ms 374 A2s
di/dt Critical rate of rise of on-state current f = 60Hz ; T
J = 125°C 125 A/s
IGM Peak gate current T
J = 125°C 3A
PG(AV) Average gate power dissipation T
J = 125°C 0.6 W
Tstg Storage temperature range -40 to 150 °C
T
JOperating junction temperature range -40 to 125 °C
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.
AK
G
Agency Approval
Agency Agency File Number
®L Package: E71639
266
Revised: July 9, 2008
©2008 Littelfuse, Inc.
Teccor® brand Thyristors
Specifications are subject to change without notice.
Please refer to http://www.littelfuse.com for current information.
20 / 25 Amp Standard SCRs
Sxx20x & Sxx25x Series
Specifications are subject to change without notice.
Please refer to http://www.littelfuse.com for current information.
Absolute Maximum Ratings — 25A SCR
Symbol Parameter Test Conditions Value Unit
IT(RMS) RMS on-state current Sxx25L: TC=75°C 25 A
Sxx25R/Sxx25N: TC=100°C
ITSM Peak non-repetitive surge current
single half cycle; f = 50Hz;
T
J (initial) = 25°C 300
A
single half cycle; f = 60Hz;
T
J (initial) = 25°C 350
I2tI
2t Value for fusing tp = 8.3 ms 510 A2s
di/dt Critical rate of rise of on-state current f = 60Hz ; T
J = 125°C 150 A/s
IGM Peak gate current T
J = 125°C 3.5 A
PG(AV) Average gate power dissipation T
J = 125°C 0.8 W
Tstg Storage temperature range -40 to 150 °C
T
JOperating junction temperature range -40 to 125 °C
Electrical Characteristics (T
J = 25°C, unless otherwise specified)
Symbol Test Conditions Value Unit
Sxx20L Sxx25x
IGT VD = 12V; RL = 608
MAX. 30 35 mA
MIN. 1 1
VGT MAX. 1.5 V
dv/dt
VD = VDRM; gate open; T
J = 100°C
400V
MIN.
450
V/s
600V
425
800V
400
1000V
200
VD = VDRM; gate open; T
J = 125°C
400V
350
600V
325
800V
300
VGD VD = VDRM; RL = 3.3 k8; T
J = 125°C MIN. 0.2 V
IHIT = 200mA (initial) MAX. 40 50 mA
tq(1) MAX. 35 s
tgt IG = 2 x IGT
; PW = 15µs; IT = 40A TYP. 2 s
Notes :
xx = voltage, x = package
(1) IT=2A; tp=50µs; dv/dt=5V/µs; di/dt=-30A/µs
Static Characteristics
Symbol Test Conditions Value Unit
VTM
20A Device IT = 40A; tp = 380s
MAX. 1.6 V
25A Device IT = 50A; tp = 380s
IDRM / IRRM VDRM / VRRM
T
J = 25°C 400 – 600V
MAX.
10
A
800 – 1000V 20
T
J = 100°C
400 – 600V 500
800V 1000
1000V 3000
T
J = 125°C 400 – 600V 1000
800V 2000
267
©2008 Littelfuse, Inc.
Revised: July 9, 2008
Teccor® brand Thyristors
Specifications are subject to change without notice.
Please refer to http://www.littelfuse.com for current information.
Sxx20x & Sxx25x Series
20 / 25 Amp Standard SCRs
Specifications are subject to change without notice.
Please refer to http://www.littelfuse.com for current information.
20/25 A SCRs
Thermal Resistances
Symbol Parameter Value Unit
RR(J-C) Junction to case (AC)
Sxx25R /
Sxx25N 1. 0
°C/W
Sxx20L 2.4
Sxx25L 2.35
RR(J-A) Junction to ambient
Sxx25R 40
°C/W
Sxx20L
Sxx25R / Sxx25L 50
Note: xx = voltage
Figure 1: Normalized DC Gate Trigger Current
vs. Junction Temperature
Figure 2: Normalized DC Gate Trigger Voltage
vs. Junction Temperature
125
0.0
0.5
1.0
1.5
2.0
-40 -1510 3560 85110
Junction Temperature (TJ) – (ºC)
Ratio of IGT / IGT (TJ = 25ºC)
Figure 3: Normalized DC Holding Current
vs. Junction Temperature
Figure 4: On-State Current vs. On-State
Voltage (Typical)
125
0.0
0.5
1.0
1.5
2.0
-40 -1510 3560 85110
Junction Temperature (TJ) – (ºC)
Ratio of VGT / VGT (TJ = 25ºC)
125
0.0
0.5
1.0
1.5
2.0
-40 -1510 3560 85110
Junction Temperature (TJ) – (ºC)
Ratio of IH / IH (TJ = 25ºC)
TJ = 25°C
0
10
20
30
40
50
60
70
80
90
0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.51.6
Sxx25L
Sxx25R
Sxx25N
Sxx20L
Instantaneous On-state Voltage (vT) – Volts
Intantaneous On-state Current (iT) – Amps
268
Revised: July 9, 2008
©2008 Littelfuse, Inc.
Teccor® brand Thyristors
Specifications are subject to change without notice.
Please refer to http://www.littelfuse.com for current information.
20 / 25 Amp Standard SCRs
Sxx20x & Sxx25x Series
Specifications are subject to change without notice.
Please refer to http://www.littelfuse.com for current information.
Figure 5: Power Dissipation (Typical)
vs. RMS On-State Current
Figure 6: Maximum Allowable Case Temperature
vs. RMS On-State Current
0
2
4
6
8
10
12
14
16
18
20
22
0510 1520 25
Sxx25L
Sxx25R
Sxx25N
Sxx20L
RMS On-State Current [IT(RMS)] - (Amps)
Average On-State Power Dissipation
[PD(AV)] - (Watts)
70
75
80
85
90
95
100
105
110
115
120
125
130
0510 1520 2530
CURRENT WAVEFORM: Sinusoidal
LOAD: Resistive or Inductive
CONDUCTION ANGLE: 180°
Sxx25R
Sxx25N
Sxx20L
Sxx25L
RMS On-State Current [IT(RMS)] - Amps
Maximum Allowable Case
Temperature (TC) - °C
Figure 7: Maximum Allowable Case Temperature
vs. Average On-State Current
Figure 8: Maximum Allowable Ambient Temperature
vs. RMS On-State Current
Figure 9: Maximum Allowable Ambient Temperature vs. Average On-State Current
70
75
80
85
90
95
100
105
110
115
120
125
130
024681012141618
CURRENT WAVEFORM: Sinusoidal
LOAD: Resistive or Inductive
CONDUCTION ANGLE: 180°
Sxx20L
Sxx25L
Sxx25R
Sxx25N
Average On-State Current [I
T(AVE)
] - Amps
Maximum Allowable Case
Temperature (T
C
) - °C
0
20
40
60
80
100
120
0.0 0.51.0 1. 52.0 2.5
CURRENT WAVEFORM: Sinusoidal
LOAD: Resistive or Inductive
CONDUCTION ANGLE: 180°
FREE AIR RATING
Sxx20L
Sxx25L
Sxx25N
Sxx25R
RMS On-State Current [IT(RMS)] - Amps
Maximum Allowable Ambient
Temperature (TA) - ºC
0
20
40
60
80
100
120
0.0 0.51.0 1. 5
CURRENT WAVEFORM: Sinusoidal
LOAD: Resistive or Inductive
CONDUCTION ANGLE: 180°
FREE AIR RATING
Sxx25L
Sxx25N
Sxx25R
Sxx20L
Average On-State Current [IT(AVE)] - Amps
Maximum Allowable Ambient
Temperature (T
A
) - ºC
Note: xx = voltage
269
©2008 Littelfuse, Inc.
Revised: July 9, 2008
Teccor® brand Thyristors
Specifications are subject to change without notice.
Please refer to http://www.littelfuse.com for current information.
Sxx20x & Sxx25x Series
20 / 25 Amp Standard SCRs
Specifications are subject to change without notice.
Please refer to http://www.littelfuse.com for current information.
20/25 A SCRs
Figure 10: Peak Capacitor Discharge Current Figure 11: Peak Capacitor Discharge Current Derating
1000
10
100
0.51.0 10.0 50.0
Sxx20L
Sxx25L
Sxx25R
Sxx25N
Pulse Current Duration (tW) - ms
Peak Discharge Current (I
TM
) - Amps
ITRM
tW
0.0
0.2
0.4
0.6
0.8
1.0
1.2
0255075100 125150
Case Temperature (TC) - ºC
Normalized Peak Current
10
100
1000
1 10 100 1000
Sxx25L
Sxx25R
Sxx25N
Sxx20L
Peak Surge (Non-repetitive)On-state
Current (ITSM) – Amps
Surge Current Duration -- Full Cycles
Figure 12: Surge Peak On-State Current vs. Number of Cycles
SUPPLY FREQUENCY: 60 Hz Sinusoidal
LOAD: Resistive
RMS On-State Current: [IT(RMS)]: Maximum Rated
Value at Specified Case Temperature
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.
270
Revised: July 9, 2008
©2008 Littelfuse, Inc.
Teccor® brand Thyristors
Specifications are subject to change without notice.
Please refer to http://www.littelfuse.com for current information.
20 / 25 Amp Standard SCRs
Sxx20x & Sxx25x Series
Specifications are subject to change without notice.
Please refer to http://www.littelfuse.com for current information.
Soldering Parameters
Reflow Condition Pb – Free assembly
Pre Heat
- Temperature Min (Ts(min))150°C
- Temperature Max (Ts(max))200°C
- Time (min to max) (ts)60 – 190 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) 217°C
- Temperature (tL)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 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
Thermal Shock
MIL-STD-750, M-1056
10 cycles; 0°C to 100°C; 5-min dwelltime
at each temperature; 10 sec (max) transfer
time between temperature
Autoclave
EIA / JEDEC, JESD22-A102
168 hours (121°C at 2 ATMs) and
100% R/H
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
Terminal Finish 100% Matte Tin-plated
Body Material UL recognized epoxy meeting flammability
classification 94V-0
Lead Material Copper Alloy
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.
Time
Temperature
TP
TL
TS(max)
TS(min)
25
tP
tL
tS
time to peak temperature
Preheat
P
reheat
Ramp-upRamp-up
Ramp-down
R
am
p
-
do
271
©2008 Littelfuse, Inc.
Revised: July 9, 2008
Teccor® brand Thyristors
Specifications are subject to change without notice.
Please refer to http://www.littelfuse.com for current information.
Sxx20x & Sxx25x Series
20 / 25 Amp Standard SCRs
Specifications are subject to change without notice.
Please refer to http://www.littelfuse.com for current information.
20/25 A SCRs
Dimensions — TO-220AB (R-Package) — Non-Isolated Mounting Tab Common with Center Lead
Dimension Inches Millimeters
Min Max Min Max
A 0.380 0.420 9.65 10.67
B 0.105 0.115 2.67 2.92
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
K
J
A
H
G
B
F
E
C
D
L
R
T
C
MEASURING POINT
ANODE
O
P
N
M
.276
7. 0 1
.526
13.36
.320
8.13
AREA (REF.) 0.17 IN
2
NOTCH IN
GATE LEAD
TO ID.
NON-ISOLATED
TAB
GATECATHODE ANODE
Dimensions — TO-220AB (L-Package) — Isolated Mounting Tab
Dimension Inches Millimeters
Min Max Min Max
A 0.380 0.420 9.65 10.67
B 0.105 0.115 2.67 2.92
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
A
H
G
B
F
E
C
D
L
R
T
C
MEASURING POINT AREA (REF.) 0.17 IN
2
O
P
N
M
.320
8.13
.526
13.36
.276
7. 0 1
K
J
GATECATHODE ANODE
Note: Maximum torque to
be applied to mounting tab
is 8 in-lbs. (0.904 Nm).
Note: Maximum torque to
be applied to mounting tab
is 8 in-lbs. (0.904 Nm).
272
Revised: July 9, 2008
©2008 Littelfuse, Inc.
Teccor® brand Thyristors
Specifications are subject to change without notice.
Please refer to http://www.littelfuse.com for current information.
20 / 25 Amp Standard SCRs
Sxx20x & Sxx25x Series
Specifications are subject to change without notice.
Please refer to http://www.littelfuse.com for current information.
Dimensions –TO- 263AA (N-package) — D2-Pak Surface Mount
Dimension Inches Millimeters
Min Max Min Max
A 0.360 0.370 9.14 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
Product Selector
Part Number Voltage Gate Sensitivity Type Package
400V 600V 800V 1000V
Sxx20L XXXX 30mA Standard SCR TO-220L
Sxx25L XXXX 35mA Standard SCR TO-220L
Sxx25R XXXX 35mA Standard SCR TO-220R
Sxx25N XXXX 35mA Standard SCR TO-263
Note: xx = Voltage
G
B
A
W
F
D
V
S
CATHODE
ANODE
T
C
MEASURING POINT
C
E
K
H
J
U
.320
8.13
.276
7. 01
.331
8.41
GATE
.460
11.68
.665
16.89
.260
6.60
.150
3.81
.080
2.03
.085
2.16
.055
1.40
.350
8.89
.276
7. 01
.276
7. 01
AREA: 0.11 in 2
Packing Options
Part Number Marking Weight Packing Mode Base Quantity
Sxx20L Sxx20L 2.2g Bulk 500
Sxx20LTP Sxx20L 2.2g Tube 500
Sxx25L Sxx25L 2.2g Bulk 500
Sxx25LTP Sxx25L 2.2g Tube 500
Sxx25R Sxx25R 2.2g Bulk 500
Sxx25RTP Sxx25R 2.2g Tube 500
Sxx25NTP Sxx25N 1.6g Tube 500
Sxx25NRP Sxx25N 1.6g Embossed Carrier 500
Note: xx = Voltage
273
©2008 Littelfuse, Inc.
Revised: July 9, 2008
Teccor® brand Thyristors
Specifications are subject to change without notice.
Please refer to http://www.littelfuse.com for current information.
Sxx20x & Sxx25x Series
20 / 25 Amp Standard SCRs
Specifications are subject to change without notice.
Please refer to http://www.littelfuse.com for current information.
20/25 A SCRs
TO-263 Embossed Carrier Reel Pack (RP) Specifications
Gate
MT1 / Cathode
MT2 / Anode
0.512 (13.0) Arbor
Hole Dia.
0.945
(24.0)
0.63
(16.0)
1.01
(25.7)
12.99
(330.0)
0.827
(21.0)
0.157
(4.0)
Direction of Feed
Dimensions
are in inches
(and millimeters).
*
*Cover tape
0.059 DIA
(1.5)
Meets all EIA-481-2 Standards
Part Numbering System Part Marking System
TO-220 AB (R, and L Packages)
TO-263 AA (N Package)
yxxxx
Q6020L5
S60 20 56
DEVICE TYPE
S: SCR
VOLTAGE RATING
40: 400V
60: 600V
80: 800V
K0: 1000V
CURRENT RATING
20: 20A
25: 25A
SENSITIVITY & TYPE
(blank): Sxxx20L = 30mA
Sxxx25x = 35mA
PACKAGE TYPE
L: TO-220 Isolated
R: TO-220 Non-Isolated
N: TO-263 (D 2-Pak)
LEAD FORM DIMENSIONS
xx: Lead Form Option
L