Littelfuse Sxx25x User Manual
Sxx20x & Sxx25x Series
Teccor® brand Thyristors
20 / 25 Amp Standard SCRs
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
Agency Approval
Agency Agency File Number
®
L Package: E71639
Main Features
Symbol Value Unit
I
T(RMS)
V
DRM/VRRM
I
GT
20 & 25 A
400 to 1000 V
30 to 35 mA
Absolute Maximum Ratings — 20A SCR
t3P)4DPNQMJBOU
t(MBTToQBTTJWBUFE
junctions
t7PMUBHFDBQBCJMJUZVQ
to 1000 V
t4VSHFDBQBCJMJUZVQUP
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
Symbol Parameter Test Conditions Value Unit
I
T(RMS)
I
T(AV)
I
TSM
2
I
tI
di/dt Critical rate of rise of on-state current
I
GM
P
G(AV)
T
stg
T
J
Sxx20x & Sxx25x Series
RMS on-state current TC = 80°C 20 A
Average on-state current Sxx20x TC = 80°C 12.8 A
Peak non-repetitive surge current
2
t Value for fusing tp = 8.3 ms 374 A2s
Peak gate current
Average gate power dissipation
single half cycle; f = 50Hz;
TJ (initial) = 25°C
single half cycle; f = 60Hz;
T
(initial) = 25°C
J
f = 60Hz ; T
T
= 125°C
J
T
= 125°C
J
= 125°C
J
255
300
125 A/s
3A
0.6 W
Storage temperature range -40 to 150 °C
Operating junction temperature range -40 to 125 °C
295
Specifications are subject to change without notice.
A
©2013 Littelfuse, Inc
Revised: 09/23/13
Teccor® brand Thyristors
20 / 25 Amp Standard SCRs
Absolute Maximum Ratings — 25A SCR
Symbol Parameter Test Conditions Value Unit
I
T(RMS)
I
T(AV)
I
TSM
2
tI
I
RMS on-state current
Average on-state current
Peak non-repetitive surge current
2
t Value for fusing tp = 8.3 ms 510 A2s
di/dt Critical rate of rise of on-state current
I
GM
P
G(AV)
T
stg
T
J
Operating junction temperature range -40 to 125 °C
Peak gate current
Average gate power dissipation
Storage temperature range -40 to 150 °C
Sxx25L: T
Sxx25R/Sxx25N: T
Sxx25L T
Sxx25R/Sxx25N T
single half cycle; f = 50Hz;
TJ (initial) = 25°C
single half cycle; f = 60Hz;
T
J
f = 60Hz ; T
=75°C
C
=100°C
C
C
(initial) = 25°C
= 125°C
J
T
= 125°C
J
T
= 125°C
J
= 75°C
C
= 100°C
25 A
16.0 A
300
350
150 A/s
3.5 A
0.8 W
A
Electrical Characteristics (T
= 25°C, unless otherwise specified)
J
Symbol Test Conditions
I
GT
V
GT
VD = 12V; RL = 30
= V
V
; gate open; TJ = 100°C
D
DRM
dv/dt
V
= V
; gate open; TJ = 125°C
D
DRM
V
GD
I
H
t
q
t
gt
Notes :
xx = voltage, x = package
(1) I
=2A; tp=50µs; dv/dt=5V/µs; di/dt=-30A/µs
T
VD = V
IT = 400mA (initial) MAX. 40 50 mA
(1) MAX. 35 s
IG = 2 x IGT; PW = 15µs; IT = 40A TYP. 2 s
; RL = 3.3 k; TJ = 125°C MIN. 0.2 V
DRM
400V
600V
800V
1000V
400V
600V
800V
Value
Sxx20L Sxx25x
MAX. 30 35
MIN. 1 1
Unit
mA
MAX. 1.5 V
450
425
400
MIN.
200
V/s
350
325
300
Sxx20x & Sxx25x Series
296
Specifications are subject to change without notice.
©2013 Littelfuse, Inc
Revised: 09/23/13
Teccor® brand Thyristors
20 / 25 Amp Standard SCRs
Static Characteristics
Symbol Test Conditions Value Unit
V
TM
/ I
I
DRM
RRM
V
DRM
Thermal Resistances
Symbol Parameter Value Unit
R
(J-C)
R
(J-A)
Note: xx = voltage
Junction to case (AC)
Junction to ambient
20A Device IT = 40A; tp = 380s
25A Device I
= 50A; tp = 380s
T
TJ = 25°C
/ V
RRM
T
= 100°C
J
T
= 125°C
J
MAX. 1.6 V
o7
10
o7 20
o7 500
800V 1000
MAX.
1000V 3000
o7 1000
800V 2000
Sxx25R /
Sxx25N
1. 0
Sxx20L 2.4
Sxx25L 2.35
Sxx25R 40
Sxx20L
/ Sxx25L
50
A
°C/W
°C/W
Figure 1: Normalized DC Gate Trigger Current
vs. Junction Temperature
2.0
1.5
= 25ºC)
J
(T
GT
1.0
/ I
GT
0.5
Ratio of I
0.0
-40 -15 10 35 60 85 11 0
Junction Temperature (TJ) – (ºC)
125
Figure 2: Normalized DC Gate Trigger Voltage
vs. Junction Temperature
2.0
1.5
= 25ºC)
J
(T
GT
1.0
/ V
GT
0.5
Ratio of V
0.0
-40 -15 10 35 60 85 110
Junction Temperature (TJ) – (ºC)
125
Sxx20x & Sxx25x Series
297
Specifications are subject to change without notice.
©2013 Littelfuse, Inc
Revised: 09/23/13
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