Revised: 07/25/18
Specifications are subject to change without notice.
©2018 Littelfuse, Inc
Thyristors
20 / 25 Amp Standard SCRs
Sxx20x & Sxx25x Series
SJxx25xx Series
Description
This SJxx25xx high temperature SCR series is ideal for
uni-directional switch applications such as phase control
in heating, motor speed controls, converters/rectifiers and
inrush current controllers. These SCRs have a low gate
current trigger level of 6mA,10mA or 35mA maximum at
approximately 1.5V
Features & Benefits
• Halogen free and RoHS
compliant
• 150°C maximum junction
temperature
• Surge capability up to
350 A at 60 Hz half cycle
Schematic Symbol
Main Features
Symbol Value Unit
IT(RMS) 25 A
VDRM /VRRM 400 or 600 V
IGT 6,10, to 35 mA
Absolute Maximum Ratings
Symbol Parameter Test Conditions Value Unit
VDRM/VRSM Peak non-repetitive blocking voltage Pw=100 μs VDRM/VRRM+100 V
IT(RMS) RMS on-state current
SJxx25Lx TC = 100°C
25 A
SJxx25Rx
SJxx25Nx TC = 125°C
IT(AV) Average on-state current
SJxx25Lx TC = 100°C
16 A
SJxx25Rx
SJxx25Nx TC = 125°C
ITSM Peak non-repetitive surge current
single half cycle; f = 50Hz;
TJ (initial) = 25°C 300
A
single half cycle; f = 60Hz;
TJ (initial) = 25°C 350
I2t I2t Value for fusing tp = 8.3 ms 510 A2s
di/dt Critical rate of rise of on-state current f = 60Hz ; TJ = 150°C 125 A/μs
IGM Peak gate current TJ = 150°C 3 A
PG(AV) Average gate power dissipation TJ = 150°C 0.6 W
Tstg Storage temperature range -40 to 150 °C
TJOperating junction temperature range -40 to 150 °C
Note: xx=voltage/10, x=sensitivity
Applications
Typical applications include AC Generator (ACG) rectifiers,
battery voltage regulators, generic converters, inrush
current controller in various AC to DC applications and soft
starter for low power AC motor. Additional applications
include controls for power tools, home/brown good and
white goods appliances.
Isolated packages offered for ease of heat sinking.
AK
G
RoHS
25 Amps High Junction Temperature SCRs
SJxx25xx Series
Agency Agency File Number
L Packages: E71639
Agency Approval
Revised: 07/25/18
Specifications are subject to change without notice.
©2018 Littelfuse, Inc
Thyristors
20 / 25 Amp Standard SCRs
Sxx20x & Sxx25x Series
Electrical Characteristics (TJ = 25°C, unless otherwise specified)
Symbol Test Conditions Value Unit
SJxx25x SJxx25x1 SJxx25x2
IGT VD = 12V RL = 60 Ω
MAX. 35 6 10
mA
MIN. 8 2 5
VGT VD = 12V RL = 60 ΩMAX. 1. 5 V
dv/dt
VD = 67% VDRM; gate open; TJ = 125°C
MIN.
800 70 500
V/μs
VD = 67% VDRM; gate open; TJ = 150°C 400 - 200
VGD VD = VDRM RL = 3.3 kΩ TJ = 125°C MIN. 0.2 V
IHIT = 400mA (initial) MAX. 75 15 35 mA
tqIT = 2A; tp = 50µs; dv/dt = 5V/µs; di/dt = 30A/µs MAX. 40 μs
tgt IG = 2 x IGT PW = 15µs IT = 50A TYP. 2 μs
Note: xx=voltage/10, x=package
Static Characteristics
Symbol Test Conditions Value Unit
VTM Component IT = 50A; tp = 380 µs MAX. 1. 6 V
IDRM / IRRM VDRM = VRRM
TJ = 25°C
MAX.
10
μA
TJ = 125°C 1000
TJ = 150°C 3000
Thermal Resistances
Symbol Parameter Value Unit
Rθ(JC) Junction to case (AC)
SJxx25Rx
SJxx25Nx 1. 0
°C/W
SJxx25Lx 2.3
Note: xx=voltage/10, x=sensitivity
Figure 1: Normalized DC Gate Trigger Current
vs. Junction Temperature
Figure 2: Normalized DC Gate Trigger Voltage
vs. Junction Temperature
Junction Temperature (T
J
) -- (ºC)
Ratio of I
GT
/ I
GT
(T
J
= 25°C)
0.0
0.4
0.8
1.2
1.6
2.0
-40-15 10 35 60 85 110135 150
Junction Temperature (TJ) -- (°C)
Ratio of VGT / VGT (TJ = 25ºC)
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
-40-15 10 35 60 85 110135 150
25 Amps High Junction Temperature SCRs
SJxx25xx Series
Revised: 07/25/18
Specifications are subject to change without notice.
©2018 Littelfuse, Inc
Thyristors
20 / 25 Amp Standard SCRs
Sxx20x & Sxx25x Series
Figure 3: Normalized DC Holding Current
vs. Junction Temperature
Figure 4: On-State Current vs. On-State
Voltage (Typical)
Instantaneous On-state Voltage (vT) – Volts
Intantaneous On-state Current (iT) – Amps
0
10
20
30
40
50
60
0.60.7 0.80.9 1.01.1 1.21.3 1.41.5 1.6
T
J
= 25°C
Figure 5: Power Dissipation (Typical)
vs. RMS On-State Current
Figure 6: Maximum Allowable Case Temperature
vs. RMS On-State Current
RMS On-State Current [IT(RMS)] - (Amps)
Average On-State Power Dissipation
[P
D(AV)
] - (Watts)
0
5
10
15
20
25
0510 15 20 25
100
110
120
130
0510 15 20 25 30
CURRENT WAVEFORM: Sinusoidal
LOAD: Resistive or Inductive
CONDUCTION ANGLE: 180°
SJxx25Rx
SJxx25Nx
SJxx25Lx
RMS On-State Current [IT(RMS)] - Amps
Maximum Allowable Case
Temperature (TC) - °C
140
150
70
90
80
Figure 7: Maximum Allowable Case Temperature
vs. Average On-State Current
70
80
90
100
110
120
130
140
150
0510 15 18
CURRENT WAVEFORM: Sinusoidal
LOAD: Resistive or Inductive
CONDUCTION ANGLE: 180°
SJxx25Lx
SJxx25Rx
SJxx25Nx
Average On-State Current [I
T(AVE)
] - Amps
Maximum Allowable Case
Temperature (T
C
) - °C
Junction Temperature (TJ) -- (°C)
Ratio of IH / IH (TJ = 25°C)
0.0
0.4
0.8
1.2
1.6
2.0
-40-15 10 35 60 85 110135 150
25 Amps High Junction Temperature SCRs
Figure 8: Peak Capacitor Discharge Current
1000
10
100
0.5 1.
01
0.0 50.0
Pulse Current Duration (tW) - ms
Peak Discharge Current (I
TM
) - Amps
ITRM
tW
SJxx25xx Series
Revised: 07/25/18
Specifications are subject to change without notice.
©2018 Littelfuse, Inc
Thyristors
20 / 25 Amp Standard SCRs
Sxx20x & Sxx25x Series
Figure 9: Peak Capacitor Discharge Current Derating
10
100
1000
110100 1000
Peak Surge (Non-repetitive)On-state
Current (ITSM) – Amps
Surge Current Duration -- Full Cycles
Figure 10: 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.
0.0
0.2
0.4
0.6
0.8
1.0
1.2
0255075100 12
51
50
Case Temperature (TC) - ºC
Normalized Peak Current
25 Amps High Junction Temperature SCRs
SJxx25xx Series
Revised: 07/25/18
Specifications are subject to change without notice.
©2018 Littelfuse, Inc
Thyristors
20 / 25 Amp Standard SCRs
Sxx20x & Sxx25x Series
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 – 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) 217°C
- Time (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 @ 150°C for 1008 hours
Temperature Cycling
MIL-STD-750, M-1051,
100 cycles; -55°C to +150°C;
15-min dwell-time
Temperature/
Humidity
EIA / JEDEC, JESD22-A101
1008 hours; 160V - 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
Moisture Sensitivity
Level Level 1, JEDEC-J-STD-020D
Terminal Finish 100% Matte Tin-plated
Body Material UL Recognized compound meeting
flammability rating V-0.
Lead Material Copper Alloy
Design Considerations
Careful selection of the correct component 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 component 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
r
e
h
eat
Ramp-upRamp-up
Ramp-down
R
am
p
-
do
25 Amps High Junction Temperature SCRs
SJxx25xx Series
Revised: 07/25/18
Specifications are subject to change without notice.
©2018 Littelfuse, Inc
Thyristors
20 / 25 Amp Standard SCRs
Sxx20x & Sxx25x Series
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. 01
.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. 01
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).
25 Amps High Junction Temperature SCRs
SJxx25xx Series
Revised: 07/25/18
Specifications are subject to change without notice.
©2018 Littelfuse, Inc
Thyristors
20 / 25 Amp Standard SCRs
Sxx20x & Sxx25x Series
Dimensions –TO- 263AB (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. 01 6 1.78
G
B
A
W
D
F
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
Product Selector
25 Amps High Junction Temperature SCRs
Packing Options
Part Number Marking Weight Packing Mode Base Quantity
SJxx25LxTP SJxx25Lx 2.2g Tube 500 (50 per tube)
SJxx25RxTP SJxx25Rx 2.2g Tube 500 (50 per tube)
SJxx25NxTP SJxx25Nx 1.6g Tube 500 (50 per tube)
SJxx25NxRP SJxx25Nx 1.6g Embossed Carrier 500
Note: xx=voltage/10, x=sensitivity
Part Number Voltage Gate Sensitivity Type Package
400V 600V
SJxx25L X X 35mA Standard SCR TO-220L
SJxx25R X X 35mA Standard SCR TO-220R
SJxx25N X X 35mA Standard SCR TO-263
SJxx25L1 X X 6mA Standard SCR TO-220L
SJxx25R1 X X 6mA Standard SCR TO-220R
SJxx25N1 X X 6mA Standard SCR TO-263
SJxx25L2 X X 10mA Standard SCR TO-220L
SJxx25R2 X X 10mA Standard SCR TO-220R
SJxx25N2 X X 10mA Standard SCR TO-263
Note: xx = Voltage/10
SJxx25xx Series
Revised: 07/25/18
Specifications are subject to change without notice.
©2018 Littelfuse, Inc
Thyristors
20 / 25 Amp Standard SCRs
Sxx20x & Sxx25x Series
TO-263 Embossed Carrier Reel Pack (RP) Specifications
Gate
Cathode
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
SJ 60 25 R
COMPONENT TYPE
SJ: high temperature SCR
VOLTAGE RATING
40: 400V
CURRENT RATING
25: 25A
SENSITIVITY & TYPE
PACKAGE TYPE
L: TO-220 Isolated
R: TO-220 Non-Isolated
N: TO-263 (D2-Pak)
1
[bank]:35mA
1: 6mA
2:10mA
PACKING TYPE
TP
TP: Tube Pack
RP: Reel Pack
60: 600V
®
MY
Sxx16R
TO-220 AB - (L and R Package)
TO-263 AB - (N Package)
Date Code Marking
Y:Year Code
M: Month Code
XXX: Lot Trace Code
SJ6025R1
25 Amps High Junction Temperature SCRs
SJxx25xx Series
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