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

t3P)4DPNQMJBOU

t(MBTToQBTTJWBUFE

junctions

t7PMUBHFDBQBCJMJUZVQ

to 1000 V

t4VSHFDBQBCJMJUZVQUP

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 = 380s

25A Device I

= 50A; tp = 380s

T

TJ = 25°C

/ V

RRM

T

= 100°C

J

T

= 125°C

J

MAX. 1.6 V

o7

10

o7 20

o7 500

800V 1000

MAX.

1000V 3000

o7 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

Teccor® brand Thyristors

20 / 25 Amp Standard SCRs

Figure 3: Normalized DC Holding Current

vs. Junction Temperature

2.0

1.5

= 25ºC)

J

(T

H

1.0

/ I

H

0.5

Ratio of I

0.0

-40 -15 10 35 60 85 110

Junction Temperature (TJ) – (ºC)

Figure 5: Power Dissipation (Typical)

vs. RMS On-State Current

22

20

18

16

14

12

] - (Watts)

10

D(AV)

8

[P

6

4

Average On-State Power Dissipation

2

0

0 5 10 15 20 25

RMS On-State Current [I

Sxx20L

Sxx25L
Sxx25R
Sxx25N

T(RMS)

] - (Amps)

125

Figure 4: On-State Current vs. On-State

Voltage (Typical)

90

TJ = 25°C

80

) – Amps

T

70

60

50

40

30

20

10

Intantaneous On-state Current (i

0

0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6

Sxx25L
Sxx25R
Sxx25N

Sxx20L

Instantaneous On-state Voltage (vT) – Volts

Figure 6: Maximum Allowable Case Temperature

vs. RMS On-State Current

130

125

120

115

110

) - °C

C

105

100

95

90

Temperature (T

85

Maximum Allowable Case

80

CURRENT WAVEFORM: Sinusoidal
LOAD: Resistive or Inductive

75

CONDUCTION ANGLE: 180°

70

0 5 10 1 5 20 25 30

Sxx20L

RMS On-State Current [I

Sxx25R
Sxx25N

Sxx25L

T(RMS)

] - Amps

Figure 7: Maximum Allowable Case Temperature

vs. Average On-State Current

130

125

120

115

110

) - °C

C

105

100

95

90

Temperature (T

85

Maximum Allowable Case

80

CURRENT WAVEFORM: Sinusoidal
LOAD: Resistive or Inductive

75

CONDUCTION ANGLE: 180°

70

0246 81012141

Sxx20x & Sxx25x Series

Sxx20L

Average On-State Current [I

Sxx25R
Sxx25N

Sxx25L

T(AVE)

] - Amps

618

Figure 8: Maximum Allowable Ambient Temperature

vs. RMS On-State Current

298

120

100

80

) - ºC

A

60

40

Temperature (T

Maximum Allowable Ambient

20

0

0.0 0.5 1.0 1.5 2.0 2.5

RMS On-State Current [I

CURRENT WAVEFORM: Sinusoidal
LOAD: Resistive or Inductive
CONDUCTION ANGLE: 180°
FREE AIR RATING

Sxx25L
Sxx25N
Sxx25R

Sxx20L

] - Amps

T(RMS)

Specifications are subject to change without notice.

©2013 Littelfuse, Inc

Revised: 09/23/13

Teccor® brand Thyristors

20 / 25 Amp Standard SCRs

Figure 9: Maximum Allowable Ambient Temperature vs. Average On-State Current

120

100

80

) - ºC

A

60

40

Temperature (T

Maximum Allowable Ambient

20

0

0.0 0.5 1.

Average On-State Current [I

CURRENT WAVEFORM: Sinusoidal
LOAD: Resistive or Inductive
CONDUCTION ANGLE: 180°
FREE AIR RATING

Sxx25L
Sxx25N
Sxx25R

Sxx20L

T(AVE)

01.5

] - Amps

Note: xx = voltage

Figure 10: Peak Capacitor Discharge Current Figure 11: Peak Capacitor Discharge Current Derating

1000

) - Amps

TM

100

Sxx20L

Sxx25L
Sxx25R
Sxx25N

1.2

1.0

0.8

0.6

I

TRM

Peak Discharge Current (I

10

0.5 1.

t

W

0 10.0

50.0

Pulse Current Duration (tW) - ms

Figure 12: Surge Peak On-State Current vs. Number of Cycles

1000

Sxx25L
Sxx25R

) – Amps

100

TSM

Sxx20L

Current (I

Peak Surge (Non-repetitive)On-state

10

1 10 100 1000

Surge Current Duration -- Full Cycles

Sxx25N

0.4

Normalized Peak Current

0.2

0.0
0255075 100 12

Case Temperature (TC) - ºC

SUPPLY FREQUENCY: 60 Hz Sinusoidal
LOAD: Resistive
RMS On-State Current: [I
Value at Specified Case Temperature

T(RMS)

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.

5 150

]: Maximum Rated

Sxx20x & Sxx25x Series

299

Specifications are subject to change without notice.

©2013 Littelfuse, Inc

Revised: 09/23/13

Soldering Parameters

Ramp-do

Teccor® brand Thyristors

20 / 25 Amp Standard SCRs

Reflow Condition 1Co'SFFBTTFNCMZ

T

P

- Temperature Min (T

Pre Heat

- Temperature Max (T

- Time (min to max) (ts) oTFDT

Average ramp up rate (Liquidus Temp)
(TL) to peak

T

to TL - Ramp-up Rate 5°C/second max

S(max)

Reflow

- Temperature (TL) (Liquidus) 217°C

- Temperature (tL) oTFDPOET

Peak Temperature (TP) 260

Time within 5°C of actual peak
Temperature (tp)

) 150°C

s(min)

) 200°C

s(max)

5°C/second max

+0/-5

°C

oTFDPOET

T

L

T

S(max)

Temperature

T

S(min)

25

Ramp-upRamp-up

PreheatPreheat

t

S

time to peak temperature

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

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.

Test

AC Blocking

Temperature Cycling

Temperature/
Humidity

High Temp Storage

Low-Temp Storage 1008 hours; -40°C

Thermal Shock

Autoclave

Resistance to
Solder Heat

Solderability ANSI/J-STD-002, category 3, Test A

Lead Bend MIL-STD-750, M-2036 Cond E

Specifications and Conditions

MIL-STD-750, M-1040, Cond A Applied
Peak AC voltage @ 125°C for 1008 hours

MIL-STD-750, M-1051,
100 cycles; -40°C to +150°C;
15-min dwell-time

EIA / JEDEC, JESD22-A101
1008 hours; 320V - DC: 85°C;
85% rel humidity

MIL-STD-750, M-1031,
1008 hours; 150°C

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

EIA / JEDEC, JESD22-A102
168 hours (121°C at 2 ATMs) and
100% R/H

MIL-STD-750 Method 2031

t

P

t

L

Ramp-down

Time

Sxx20x & Sxx25x Series

300

Specifications are subject to change without notice.

©2013 Littelfuse, Inc

Revised: 09/23/13

Teccor® brand Thyristors

20 / 25 Amp Standard SCRs

Dimensions — TO-220AB (R-Package) — Non-Isolated Mounting Tab Common with Center Lead

7. 0 1
.276

13.36
.526

2

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

T

MEASURING POINT

C

E

C

D

G

A

ANODE

B

F

R

L

H

GATECATHODE

ANODE

K

J

O

P

NOTCH IN
GATE LEAD
TO ID.
NON-ISOLATED
TAB

N

M

Note: Maximum torque to
be applied to mounting tab

AREA (REF.) 0.17 IN

8.13
.320

is 8 in-lbs. (0.904 Nm).

Dimensions — TO-220AB (L-Package) — Isolated Mounting Tab

7. 0 1
.276

2

13.36
.526

T

MEASURING POINT AREA (REF.) 0.17 IN

C

E

C

D

G

A

B

F

R

L

H

GATECATHODE

ANODE

K

J

O

P

N

M

8.13
.320

Note: Maximum torque to
be applied to mounting tab
is 8 in-lbs. (0.904 Nm).

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

Sxx20x & Sxx25x Series

301

Specifications are subject to change without notice.

©2013 Littelfuse, Inc

Revised: 09/23/13

Teccor® brand Thyristors

20 / 25 Amp Standard SCRs

Dimensions –TO- 263AB (N-package) — D2-Pak Surface Mount

T

MEASURING POINT

16.89
.665

W

CATHODE

7. 0 1
.276

3.81
.150

ANODE

G

11.68
.460

8.89
.350

6.60
.260

C

B

A

GATE

D

F

2.03
.080

C

V

S

K

2.16
.085

7. 0 1
.276

1.40
.055

E

U

J

H

AREA: 0.11 in

2

8.41
.331

7. 0 1
.276

8.13
.320

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

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

Voltage

Gate Sensitivity Type Package

Packing Options

Part Number Marking Weight Packing Mode Base Quantity

Sxx20L Sxx20L 2.2g Bulk 500

Sxx20LTP Sxx20L 2.2g Tube 500 (50 per tube)

Sxx25L Sxx25L 2.2g Bulk 500

Sxx25LTP Sxx25L 2.2g Tube 500 (50 per tube)

Sxx25R Sxx25R 2.2g Bulk 500

Sxx25RTP Sxx25R 2.2g Tube 500 (50 per tube)

Sxx25NTP Sxx25N 1.6g Tube 500 (50 per tube)

Sxx25NRP Sxx25N 1.6g Embossed Carrier 500

Note: xx = Voltage

Sxx20x & Sxx25x Series

302

Specifications are subject to change without notice.

©2013 Littelfuse, Inc

Revised: 09/23/13

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)

0.059
(1.5)

Gate

DIA

Cathode

0.945
(24.0)

0.827
(21.0)

*

* Cover tape

Anode

12.99

0.512 (13.0) Arbor
Hole Dia.

1.01

(25.7)

(330.0)

Direction of Feed

Dimensions
are in inches
(and millimeters).

Part Numbering System Part Marking System

TO-220 AB - (L and R Package)

TO-263 AB - (N Package)

DEVICE TYPE

S: SCR

VOLTAGE RATING

40: 400V
60: 600V
80: 800V
K0: 1000V

CURRENT RATING

20: 20A
25: 25A

S 60 20 56

L

LEAD FORM DIMENSIONS

xx: Lead Form Option

SENSITIVITY & TYPE

(blank): Sxxx20L = 30mA
Sxxx25x = 35mA

PACKAGE TYPE

L: TO-220 Isolated
R: TO-220 Non-Isolated
N: TO-263 (D2-Pak)

S6020R

MY

Date Code Marking

Y:Year Code
M: Month Code
XXX: Lot Trace Code

®

Sxx20x & Sxx25x Series

303

Specifications are subject to change without notice.

©2013 Littelfuse, Inc

Revised: 09/23/13