SERIES CONNECTED, CENTER TAP, 2 ELEMENTS Silicon Controlled Rectifiers (SCR) 522

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Part RoHS Manufacturer Trigger Device Type Package Style (Meter) Surface Mount Terminal Position Configuration Case Connection Maximum On-state Voltage Package Body Material Maximum DC Gate Trigger Current Non Repetitive Peak On-state Current Terminal Form Package Shape Maximum On-state Current No. of Elements Maximum Leakage Current Repetitive Peak Reverse Voltage Maximum Repetitive Peak Off-state Leakage Current No. of Terminals Sub-Category Maximum Operating Temperature Minimum Operating Temperature Terminal Finish Maximum RMS On-state Current JESD-30 Code Moisture Sensitivity Level (MSL) Maximum DC Gate Trigger Voltage Qualification Repetitive Peak Off-state Voltage Minimum Critical Rate of Rise of Off-state Voltage Maximum Holding Current Additional Features Nominal Circuit Commutated Turn-off Time JEDEC-95 Code JESD-609 Code Maximum Time At Peak Reflow Temperature (s) Peak Reflow Temperature (C) Reference Standard

MCC44-14IO8B

Littelfuse

SCR

FLANGE MOUNT

NO

UPPER

SERIES CONNECTED, CENTER TAP, 2 ELEMENTS

ISOLATED

UNSPECIFIED

100 mA

1200 A

UNSPECIFIED

RECTANGULAR

49 A

2

15 mA

1400 V

5

Silicon Controlled Rectifiers

125 Cel

-40 Cel

80 A

R-XUFM-X5

1.5 V

Not Qualified

1400 V

200 mA

TO-240AA

NOT SPECIFIED

NOT SPECIFIED

UL RECOGNIZED

MCA500-16IO1

Littelfuse

SCR

FLANGE MOUNT

NO

UNSPECIFIED

SERIES CONNECTED, CENTER TAP, 2 ELEMENTS

ISOLATED

UNSPECIFIED

300 mA

UNSPECIFIED

RECTANGULAR

2

1600 V

7

1294 A

R-XXFM-X7

Not Qualified

1600 V

NOT SPECIFIED

NOT SPECIFIED

MCC94-24IO1B

Littelfuse

SCR

FLANGE MOUNT

NO

UPPER

SERIES CONNECTED, CENTER TAP, 2 ELEMENTS

ISOLATED

UNSPECIFIED

200 mA

1800 A

UNSPECIFIED

RECTANGULAR

104 A

2

15 mA

2400 V

5

Silicon Controlled Rectifiers

125 Cel

-40 Cel

180 A

R-XUFM-X5

1.5 V

Not Qualified

2400 V

150 mA

TO-240AA

NOT SPECIFIED

NOT SPECIFIED

UL RECOGNIZED

MCC95-16IO8B

Littelfuse

SCR

FLANGE MOUNT

NO

UPPER

SERIES CONNECTED, CENTER TAP, 2 ELEMENTS

ISOLATED

UNSPECIFIED

150 mA

2400 A

UNSPECIFIED

RECTANGULAR

116 A

2

15 mA

1600 V

5

Silicon Controlled Rectifiers

125 Cel

-40 Cel

180 A

R-XUFM-X5

1.5 V

Not Qualified

1600 V

200 mA

TO-240AA

NOT SPECIFIED

NOT SPECIFIED

UL RECOGNIZED

MCC95-08IO1B

Littelfuse

SCR

FLANGE MOUNT

NO

UPPER

SERIES CONNECTED, CENTER TAP, 2 ELEMENTS

ISOLATED

UNSPECIFIED

150 mA

2400 A

UNSPECIFIED

RECTANGULAR

116 A

2

15 mA

800 V

7

Silicon Controlled Rectifiers

125 Cel

-40 Cel

180 A

R-XUFM-X7

1.5 V

Not Qualified

800 V

200 mA

TO-240AA

NOT SPECIFIED

NOT SPECIFIED

UL RECOGNIZED

MCC19-12IO1B

Littelfuse

SCR

FLANGE MOUNT

NO

UPPER

SERIES CONNECTED, CENTER TAP, 2 ELEMENTS

ISOLATED

UNSPECIFIED

100 mA

400 A

UNSPECIFIED

RECTANGULAR

18 A

2

10 mA

1200 V

7

Silicon Controlled Rectifiers

125 Cel

-40 Cel

40 A

R-XUFM-X7

1.6 V

Not Qualified

1200 V

200 mA

TO-240AA

NOT SPECIFIED

NOT SPECIFIED

UL RECOGNIZED

MCC44-08IO8B

Littelfuse

SCR

FLANGE MOUNT

NO

UPPER

SERIES CONNECTED, CENTER TAP, 2 ELEMENTS

ISOLATED

UNSPECIFIED

100 mA

1200 A

UNSPECIFIED

RECTANGULAR

49 A

2

15 mA

800 V

5

Silicon Controlled Rectifiers

125 Cel

-40 Cel

80 A

R-XUFM-X5

1.5 V

Not Qualified

800 V

200 mA

TO-240AA

NOT SPECIFIED

NOT SPECIFIED

UL RECOGNIZED

MCC19-16IO1B

Littelfuse

SCR

FLANGE MOUNT

NO

UPPER

SERIES CONNECTED, CENTER TAP, 2 ELEMENTS

ISOLATED

UNSPECIFIED

100 mA

400 A

UNSPECIFIED

RECTANGULAR

18 A

2

10 mA

1600 V

7

Silicon Controlled Rectifiers

125 Cel

-40 Cel

40 A

R-XUFM-X7

1.6 V

Not Qualified

1600 V

200 mA

TO-240AA

NOT SPECIFIED

NOT SPECIFIED

UL RECOGNIZED

MCC132-14IO1

Littelfuse

SCR

FLANGE MOUNT

NO

UPPER

SERIES CONNECTED, CENTER TAP, 2 ELEMENTS

ISOLATED

UNSPECIFIED

150 mA

5800 A

UNSPECIFIED

RECTANGULAR

300 A

2

40 mA

1400 V

7

Silicon Controlled Rectifiers

125 Cel

-40 Cel

300 A

R-XUFM-X7

2.6 V

Not Qualified

1400 V

200 mA

NOT SPECIFIED

NOT SPECIFIED

UL RECOGNIZED

MCC44-14IO1B

Littelfuse

SCR

FLANGE MOUNT

NO

UPPER

SERIES CONNECTED, CENTER TAP, 2 ELEMENTS

ISOLATED

UNSPECIFIED

100 mA

1200 A

UNSPECIFIED

RECTANGULAR

49 A

2

15 mA

1400 V

7

Silicon Controlled Rectifiers

125 Cel

-40 Cel

80 A

R-XUFM-X7

1.5 V

Not Qualified

1400 V

200 mA

TO-240AA

NOT SPECIFIED

NOT SPECIFIED

UL RECOGNIZED

MCC162-14IO1

Littelfuse

SCR

FLANGE MOUNT

NO

UPPER

SERIES CONNECTED, CENTER TAP, 2 ELEMENTS

ISOLATED

UNSPECIFIED

150 mA

6400 A

UNSPECIFIED

RECTANGULAR

300 A

2

40 mA

1400 V

7

Silicon Controlled Rectifiers

125 Cel

-40 Cel

300 A

R-XUFM-X7

2.6 V

Not Qualified

1400 V

200 mA

NOT SPECIFIED

NOT SPECIFIED

UL RECOGNIZED

MCC60-16IO1B

Littelfuse

SCR

FLANGE MOUNT

NO

UPPER

SERIES CONNECTED, CENTER TAP, 2 ELEMENTS

ISOLATED

UNSPECIFIED

100 mA

UNSPECIFIED

RECTANGULAR

100 A

2

20 mA

1600 V

7

Silicon Controlled Rectifiers

140 Cel

-40 Cel

100 A

R-XUFM-X7

1.4 V

Not Qualified

1600 V

200 mA

TO-240AA

NOT SPECIFIED

NOT SPECIFIED

MCC72-12IO8B

Littelfuse

SCR

FLANGE MOUNT

NO

UPPER

SERIES CONNECTED, CENTER TAP, 2 ELEMENTS

ISOLATED

UNSPECIFIED

150 mA

1800 A

UNSPECIFIED

RECTANGULAR

85 A

2

15 mA

1200 V

5

Silicon Controlled Rectifiers

125 Cel

-40 Cel

180 A

R-XUFM-X5

1.5 V

Not Qualified

1200 V

200 mA

TO-240AA

NOT SPECIFIED

NOT SPECIFIED

UL RECOGNIZED

MCC162-08IO1

Littelfuse

SCR

FLANGE MOUNT

NO

UPPER

SERIES CONNECTED, CENTER TAP, 2 ELEMENTS

ISOLATED

UNSPECIFIED

150 mA

6400 A

UNSPECIFIED

RECTANGULAR

300 A

2

40 mA

800 V

7

Silicon Controlled Rectifiers

125 Cel

-40 Cel

300 A

R-XUFM-X7

2.6 V

Not Qualified

800 V

200 mA

NOT SPECIFIED

NOT SPECIFIED

UL RECOGNIZED

MCC122-12IO1

Littelfuse

SCR

FLANGE MOUNT

NO

UPPER

SERIES CONNECTED, CENTER TAP, 2 ELEMENTS

ISOLATED

UNSPECIFIED

150 mA

3850 A

UNSPECIFIED

RECTANGULAR

300 A

2

10 mA

1200 V

7

Silicon Controlled Rectifiers

125 Cel

-40 Cel

300 A

R-XUFM-X7

1.6 V

Not Qualified

1200 V

200 mA

NOT SPECIFIED

NOT SPECIFIED

UL RECOGNIZED

MCK500-18IO1

Littelfuse

SCR

FLANGE MOUNT

NO

UNSPECIFIED

SERIES CONNECTED, CENTER TAP, 2 ELEMENTS

ISOLATED

UNSPECIFIED

300 mA

UNSPECIFIED

RECTANGULAR

2

1800 V

7

1294 A

R-XXFM-X7

Not Qualified

1800 V

NOT SPECIFIED

NOT SPECIFIED

MCC44-08IO1B

Littelfuse

SCR

FLANGE MOUNT

NO

UPPER

SERIES CONNECTED, CENTER TAP, 2 ELEMENTS

ISOLATED

UNSPECIFIED

100 mA

1200 A

UNSPECIFIED

RECTANGULAR

49 A

2

15 mA

800 V

7

Silicon Controlled Rectifiers

125 Cel

-40 Cel

80 A

R-XUFM-X7

1.5 V

Not Qualified

800 V

200 mA

TO-240AA

NOT SPECIFIED

NOT SPECIFIED

UL RECOGNIZED

CMA50P1600FC

Littelfuse

SCR

IN-LINE

NO

SINGLE

SERIES CONNECTED, CENTER TAP, 2 ELEMENTS

ISOLATED

PLASTIC/EPOXY

80 mA

780 A

THROUGH-HOLE

RECTANGULAR

50 A

2

3 mA

1600 V

5

Silicon Controlled Rectifiers

150 Cel

-40 Cel

MATTE TIN

79 A

R-PSIP-T5

1.6 V

Not Qualified

1600 V

100 mA

e3

UL RECOGNIZED

MCC44-12IO8B

Littelfuse

SCR

FLANGE MOUNT

NO

UPPER

SERIES CONNECTED, CENTER TAP, 2 ELEMENTS

ISOLATED

UNSPECIFIED

100 mA

1200 A

UNSPECIFIED

RECTANGULAR

49 A

2

15 mA

1200 V

5

Silicon Controlled Rectifiers

125 Cel

-40 Cel

80 A

R-XUFM-X5

1.5 V

Not Qualified

1200 V

200 mA

TO-240AA

NOT SPECIFIED

NOT SPECIFIED

UL RECOGNIZED

MCC94-22IO1B

Littelfuse

SCR

FLANGE MOUNT

NO

UPPER

SERIES CONNECTED, CENTER TAP, 2 ELEMENTS

ISOLATED

UNSPECIFIED

100 mA

1700 A

UNSPECIFIED

RECTANGULAR

104 A

2

15 mA

2200 V

7

Silicon Controlled Rectifiers

125 Cel

-40 Cel

180 A

R-XUFM-X7

1.5 V

Not Qualified

2200 V

1000 V/us

150 mA

185 us

TO-240AA

NOT SPECIFIED

NOT SPECIFIED

UL RECOGNIZED

MCC19-08IO1B

Littelfuse

SCR

FLANGE MOUNT

NO

UPPER

SERIES CONNECTED, CENTER TAP, 2 ELEMENTS

ISOLATED

UNSPECIFIED

100 mA

400 A

UNSPECIFIED

RECTANGULAR

18 A

2

10 mA

800 V

7

Silicon Controlled Rectifiers

125 Cel

-40 Cel

40 A

R-XUFM-X7

1.6 V

Not Qualified

800 V

200 mA

TO-240AA

NOT SPECIFIED

NOT SPECIFIED

UL RECOGNIZED

MCC225-12IO1

Littelfuse

SCR

FLANGE MOUNT

NO

UPPER

SERIES CONNECTED, CENTER TAP, 2 ELEMENTS

ISOLATED

UNSPECIFIED

150 mA

8500 A

UNSPECIFIED

RECTANGULAR

221 A

2

40 mA

1200 V

7

Silicon Controlled Rectifiers

130 Cel

-40 Cel

400 A

R-XUFM-X7

2 V

Not Qualified

1200 V

150 mA

NOT SPECIFIED

NOT SPECIFIED

UL RECOGNIZED

MCC26-16IO8B

Littelfuse

SCR

FLANGE MOUNT

NO

UPPER

SERIES CONNECTED, CENTER TAP, 2 ELEMENTS

ISOLATED

UNSPECIFIED

100 mA

520 A

UNSPECIFIED

RECTANGULAR

27 A

2

10 mA

1600 V

5

Silicon Controlled Rectifiers

125 Cel

-40 Cel

50 A

R-XUFM-X5

1.6 V

Not Qualified

1600 V

200 mA

TO-240AA

NOT SPECIFIED

NOT SPECIFIED

UL RECOGNIZED

MCC310-14IO1

Littelfuse

SCR

FLANGE MOUNT

NO

UPPER

SERIES CONNECTED, CENTER TAP, 2 ELEMENTS

ISOLATED

UNSPECIFIED

150 mA

9800 A

UNSPECIFIED

RECTANGULAR

520 A

2

40 mA

1400 V

7

Silicon Controlled Rectifiers

140 Cel

-40 Cel

500 A

R-XUFM-X7

3 V

Not Qualified

1400 V

150 mA

NOT SPECIFIED

NOT SPECIFIED

UL RECOGNIZED

MCC21-12IO8B

Littelfuse

SCR

FLANGE MOUNT

NO

UPPER

SERIES CONNECTED, CENTER TAP, 2 ELEMENTS

ISOLATED

UNSPECIFIED

65 mA

345 A

UNSPECIFIED

RECTANGULAR

21 A

2

5 mA

1200 V

5

Silicon Controlled Rectifiers

125 Cel

-40 Cel

33 A

R-XUFM-X5

1.2 V

Not Qualified

1200 V

100 mA

TO-240AA

NOT SPECIFIED

NOT SPECIFIED

UL RECOGNIZED

MCC200-14IO1

Littelfuse

SCR

FLANGE MOUNT

NO

UPPER

SERIES CONNECTED, CENTER TAP, 2 ELEMENTS

ISOLATED

UNSPECIFIED

150 mA

8640 A

UNSPECIFIED

RECTANGULAR

216 A

2

15 mA

1400 V

7

Silicon Controlled Rectifiers

125 Cel

-40 Cel

340 A

R-XUFM-X7

3 V

Not Qualified

1400 V

150 mA

NOT SPECIFIED

NOT SPECIFIED

UL RECOGNIZED

MCC224-24IO1

Littelfuse

SCR

FLANGE MOUNT

NO

UPPER

SERIES CONNECTED, CENTER TAP, 2 ELEMENTS

ISOLATED

UNSPECIFIED

220 mA

8500 A

UNSPECIFIED

RECTANGULAR

240 A

2

40 mA

2400 V

7

Silicon Controlled Rectifiers

130 Cel

-40 Cel

400 A

R-XUFM-X7

2 V

Not Qualified

2400 V

150 mA

NOT SPECIFIED

NOT SPECIFIED

MCC26-14IO8B

Littelfuse

SCR

FLANGE MOUNT

NO

UPPER

SERIES CONNECTED, CENTER TAP, 2 ELEMENTS

ISOLATED

UNSPECIFIED

100 mA

520 A

UNSPECIFIED

RECTANGULAR

27 A

2

10 mA

1400 V

5

Silicon Controlled Rectifiers

125 Cel

-40 Cel

50 A

R-XUFM-X5

1.6 V

Not Qualified

1400 V

200 mA

TO-240AA

NOT SPECIFIED

NOT SPECIFIED

UL RECOGNIZED

MCC225-18IO1

Littelfuse

SCR

FLANGE MOUNT

NO

UPPER

SERIES CONNECTED, CENTER TAP, 2 ELEMENTS

ISOLATED

UNSPECIFIED

150 mA

8500 A

UNSPECIFIED

RECTANGULAR

221 A

2

40 mA

1800 V

7

Silicon Controlled Rectifiers

130 Cel

-40 Cel

400 A

R-XUFM-X7

2 V

Not Qualified

1800 V

150 mA

NOT SPECIFIED

NOT SPECIFIED

UL RECOGNIZED

MCC225-16IO1

Littelfuse

SCR

FLANGE MOUNT

NO

UPPER

SERIES CONNECTED, CENTER TAP, 2 ELEMENTS

ISOLATED

UNSPECIFIED

150 mA

8500 A

UNSPECIFIED

RECTANGULAR

221 A

2

40 mA

1600 V

7

Silicon Controlled Rectifiers

130 Cel

-40 Cel

400 A

R-XUFM-X7

2 V

Not Qualified

1600 V

150 mA

NOT SPECIFIED

NOT SPECIFIED

UL RECOGNIZED

MCC26-08IO1B

Littelfuse

SCR

FLANGE MOUNT

NO

UPPER

SERIES CONNECTED, CENTER TAP, 2 ELEMENTS

ISOLATED

UNSPECIFIED

100 mA

520 A

UNSPECIFIED

RECTANGULAR

27 A

2

10 mA

800 V

7

Silicon Controlled Rectifiers

125 Cel

-40 Cel

50 A

R-XUFM-X7

1.6 V

Not Qualified

800 V

200 mA

TO-240AA

NOT SPECIFIED

NOT SPECIFIED

UL RECOGNIZED

MCC21-14IO8B

Littelfuse

SCR

FLANGE MOUNT

NO

UPPER

SERIES CONNECTED, CENTER TAP, 2 ELEMENTS

ISOLATED

UNSPECIFIED

65 mA

345 A

UNSPECIFIED

RECTANGULAR

21 A

2

5 mA

1400 V

5

Silicon Controlled Rectifiers

125 Cel

-40 Cel

33 A

R-XUFM-X5

1.2 V

Not Qualified

1400 V

100 mA

TO-240AA

NOT SPECIFIED

NOT SPECIFIED

UL RECOGNIZED

MCC26-14IO1B

Littelfuse

SCR

FLANGE MOUNT

NO

UPPER

SERIES CONNECTED, CENTER TAP, 2 ELEMENTS

ISOLATED

UNSPECIFIED

100 mA

520 A

UNSPECIFIED

RECTANGULAR

27 A

2

10 mA

1400 V

7

Silicon Controlled Rectifiers

125 Cel

-40 Cel

50 A

R-XUFM-X7

1.6 V

Not Qualified

1400 V

200 mA

TO-240AA

NOT SPECIFIED

NOT SPECIFIED

UL RECOGNIZED

MCC312-14IO1

Littelfuse

SCR

FLANGE MOUNT

NO

UPPER

SERIES CONNECTED, CENTER TAP, 2 ELEMENTS

ISOLATED

UNSPECIFIED

150 mA

9800 A

UNSPECIFIED

RECTANGULAR

320 A

2

40 mA

1400 V

7

Silicon Controlled Rectifiers

140 Cel

-40 Cel

520 A

R-XUFM-X7

2 V

Not Qualified

1400 V

150 mA

NOT SPECIFIED

NOT SPECIFIED

UL RECOGNIZED

MCC310-22IO1

Littelfuse

SCR

FLANGE MOUNT

NO

UPPER

SERIES CONNECTED, CENTER TAP, 2 ELEMENTS

ISOLATED

UNSPECIFIED

150 mA

UNSPECIFIED

RECTANGULAR

2

2100 V

7

140 Cel

-40 Cel

500 A

R-XUFM-X7

Not Qualified

2100 V

NOT SPECIFIED

NOT SPECIFIED

UL RECOGNIZED

MCC225-14IO1

Littelfuse

SCR

FLANGE MOUNT

NO

UPPER

SERIES CONNECTED, CENTER TAP, 2 ELEMENTS

ISOLATED

UNSPECIFIED

150 mA

8500 A

UNSPECIFIED

RECTANGULAR

221 A

2

40 mA

1400 V

7

Silicon Controlled Rectifiers

130 Cel

-40 Cel

400 A

R-XUFM-X7

2 V

Not Qualified

1400 V

150 mA

NOT SPECIFIED

NOT SPECIFIED

UL RECOGNIZED

MCC224-20IO1

Littelfuse

SCR

FLANGE MOUNT

NO

UPPER

SERIES CONNECTED, CENTER TAP, 2 ELEMENTS

ISOLATED

UNSPECIFIED

220 mA

8000 A

UNSPECIFIED

RECTANGULAR

240 A

2

40 mA

2000 V

7

Silicon Controlled Rectifiers

130 Cel

-40 Cel

400 A

R-XUFM-X7

2 V

Not Qualified

2000 V

1000 V/us

150 mA

200 us

NOT SPECIFIED

NOT SPECIFIED

UL RECOGNIZED

MCC310-08IO1

Littelfuse

SCR

FLANGE MOUNT

NO

UPPER

SERIES CONNECTED, CENTER TAP, 2 ELEMENTS

ISOLATED

UNSPECIFIED

150 mA

9800 A

UNSPECIFIED

RECTANGULAR

520 A

2

40 mA

800 V

7

Silicon Controlled Rectifiers

140 Cel

-40 Cel

500 A

R-XUFM-X7

3 V

Not Qualified

800 V

150 mA

NOT SPECIFIED

NOT SPECIFIED

UL RECOGNIZED

MCC21-08IO8B

Littelfuse

SCR

FLANGE MOUNT

NO

UPPER

SERIES CONNECTED, CENTER TAP, 2 ELEMENTS

ISOLATED

UNSPECIFIED

65 mA

345 A

UNSPECIFIED

RECTANGULAR

21 A

2

5 mA

800 V

5

Silicon Controlled Rectifiers

125 Cel

-40 Cel

33 A

R-XUFM-X5

1.2 V

Not Qualified

800 V

100 mA

TO-240AA

NOT SPECIFIED

NOT SPECIFIED

UL RECOGNIZED

MCC310-12IO1

Littelfuse

SCR

FLANGE MOUNT

NO

UPPER

SERIES CONNECTED, CENTER TAP, 2 ELEMENTS

ISOLATED

UNSPECIFIED

150 mA

9800 A

UNSPECIFIED

RECTANGULAR

520 A

2

40 mA

1200 V

7

Silicon Controlled Rectifiers

140 Cel

-40 Cel

500 A

R-XUFM-X7

3 V

Not Qualified

1200 V

150 mA

NOT SPECIFIED

NOT SPECIFIED

UL RECOGNIZED

MCC26-08IO8B

Littelfuse

SCR

FLANGE MOUNT

NO

UPPER

SERIES CONNECTED, CENTER TAP, 2 ELEMENTS

ISOLATED

UNSPECIFIED

100 mA

520 A

UNSPECIFIED

RECTANGULAR

27 A

2

10 mA

800 V

5

Silicon Controlled Rectifiers

125 Cel

-40 Cel

50 A

R-XUFM-X5

1.6 V

Not Qualified

800 V

200 mA

TO-240AA

NOT SPECIFIED

NOT SPECIFIED

UL RECOGNIZED

MCC312-12IO1

Littelfuse

SCR

FLANGE MOUNT

NO

UPPER

SERIES CONNECTED, CENTER TAP, 2 ELEMENTS

ISOLATED

UNSPECIFIED

150 mA

9800 A

UNSPECIFIED

RECTANGULAR

320 A

2

40 mA

1200 V

7

Silicon Controlled Rectifiers

140 Cel

-40 Cel

520 A

R-XUFM-X7

2 V

Not Qualified

1200 V

150 mA

NOT SPECIFIED

NOT SPECIFIED

UL RECOGNIZED

Silicon Controlled Rectifiers (SCR)

Silicon Controlled Rectifiers (SCRs) are semiconductor devices that are used to control the flow of electrical current in high-power applications. They are also known as thyristors, which are a family of devices that includes SCRs, triacs, and diacs.

SCRs consist of four layers of alternating p-type and n-type semiconductor material, forming three p-n junctions. The device has three terminals: the anode (A), the cathode (K), and the gate (G). The SCR is designed to conduct current only in one direction, from the anode to the cathode.

SCRs work by applying a positive voltage to the anode, which causes current to flow into the device. The gate terminal is used to control the flow of current by applying a small voltage pulse to trigger the device. Once triggered, the SCR conducts current until the voltage across the device drops below a certain level, at which point it turns off.

SCRs are commonly used in high-power applications such as motor control, lighting control, and power supplies. They are often used in conjunction with other components such as capacitors, inductors, and diodes to form complete electronic circuits.

Proper selection and use of SCRs are critical to ensure safe and reliable operation of power control circuits. Factors such as the maximum voltage rating, maximum current rating, and operating temperature range should be considered when selecting an SCR for a particular application.