Optocouplers / Photocouplers

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OptoMOS 1-Form-A (SPST-NO) Solid State Relays

Littelfuse offers an extensive portfolio of 1-Form-A (SPST-NO) Solid State Relays (SSRs) in various PC board-mount package sizes. These relays feature load current ratings from 50mA to 9A (20A with heat sink), and 30V to 1000V load voltage ratings. 1-Form-A relays are available in SOP-4, SIP-4, SMD DIP-4, SMD DIP-6, SOIC-16, Power i4-PAC, and ISOPLUS-264 packages. Fault-protected SSRs with active current limit and thermal shutdown are also available from Littelfuse to offer robust and rugged switching solutions.

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Types of Optocouplers / Photocouplers

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Results: 297

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Part #

Solid State Relays - PCB Mount SPST iso PLUS-264

CPC1979J
IXYS Integrated Circuits
1: $35.09
5,100On Order

Mfr. Part #
CPC1979J

Mouser Part #
849-CPC1979J

IXYS Integrated Circuits

Solid State Relays - PCB Mount SPST iso PLUS-264

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Datasheet

5,100On Order

$35.09

$32.38

$30.91

$30.09

View

Min.: 1
Mult.: 1

PCB Mount

ISOPLUS264

MOSFET

Solid State Relays - PCB Mount Dual 1-Form-A 400V 250mA SSR

PAA140STR
IXYS Integrated Circuits
1: $14.30
4,000Expected 11/13/2026

Mfr. Part #
PAA140STR

Mouser Part #
849-PAA140STR

IXYS Integrated Circuits

Solid State Relays - PCB Mount Dual 1-Form-A 400V 250mA SSR

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Datasheet

4,000Expected 11/13/2026

Cut Tape

$14.30

$12.75

$12.17

$11.76

View

Reel

$9.39

MouseReel Available

Min.: 1
Mult.: 1

: 1,000

PCB Mount

SMD DIP-8

MOSFET

Solid State Relays - PCB Mount Dual 1-Form-A 250V 250mA SSR

PAA150STR
IXYS Integrated Circuits
1: $13.26
1,948Expected 9/10/2026

Mfr. Part #
PAA150STR

Mouser Part #
849-PAA150STR

IXYS Integrated Circuits

Solid State Relays - PCB Mount Dual 1-Form-A 250V 250mA SSR

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Datasheet

1,948Expected 9/10/2026

Cut Tape

$13.26

$11.82

$11.29

$10.90

View

Reel

$8.80

MouseReel Available

Min.: 1
Mult.: 1

: 1,000

PCB Mount

SMD DIP-8

MOSFET

Solid State Relays - PCB Mount SPST-NO 6PIN DIP

PLA110
IXYS Integrated Circuits
1: $7.46
4,144Expected 2/8/2027

Mfr. Part #
PLA110

Mouser Part #
849-PLA110

IXYS Integrated Circuits

Solid State Relays - PCB Mount SPST-NO 6PIN DIP

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Datasheet

4,144Expected 2/8/2027

$7.46

$6.65

$6.35

$6.13

View

Min.: 1
Mult.: 1

PCB Mount

DIP-6

MOSFET

Solid State Relays - PCB Mount Single-Pole Relay 400V 250mA

PLA140STR
IXYS Integrated Circuits
1: $8.88
9,000Expected 2/8/2027

Mfr. Part #
PLA140STR

Mouser Part #
849-PLA140STR

IXYS Integrated Circuits

Solid State Relays - PCB Mount Single-Pole Relay 400V 250mA

Learn More

Datasheet

9,000Expected 2/8/2027

Cut Tape

$8.88

$7.91

$7.56

$7.30

View

Reel

$6.22

MouseReel Available

Min.: 1
Mult.: 1

: 1,000

PCB Mount

SMD DIP-6

MOSFET

Solid State Relays - PCB Mount Single Pole Relay 400V 140mA

CPC1390GR
IXYS Integrated Circuits
1: $4.36
600Expected 10/9/2026

Mfr. Part #
CPC1390GR

Mouser Part #
849-CPC1390GR

IXYS Integrated Circuits

Solid State Relays - PCB Mount Single Pole Relay 400V 140mA

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Datasheet

600Expected 10/9/2026

$4.36

$3.89

$3.71

$3.58

View

Min.: 1
Mult.: 1

PCB Mount

SMD DIP-4

MOSFET

Solid State Relays - PCB Mount 1-Form-A 250V 200mA Solid State Relay

CPC1510GS
IXYS Integrated Circuits
1: $7.04
1,782Expected 10/16/2026

Mfr. Part #
CPC1510GS

Mouser Part #
849-CPC1510GS

IXYS Integrated Circuits

Solid State Relays - PCB Mount 1-Form-A 250V 200mA Solid State Relay

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Datasheet

1,782Expected 10/16/2026

$7.04

$6.30

$5.81

$5.60

View

Min.: 1
Mult.: 1

PCB Mount

SMD DIP-6

MOSFET

Solid State Relays - PCB Mount SP, Normally-Open OptoMOS Relay

CPC1563GS
IXYS Integrated Circuits
1: $6.47
1,100Expected 1/1/2027

Mfr. Part #
CPC1563GS

Mouser Part #
849-CPC1563GS

IXYS Integrated Circuits

Solid State Relays - PCB Mount SP, Normally-Open OptoMOS Relay

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Datasheet

1,100Expected 1/1/2027

$6.47

$5.77

$5.51

$5.31

View

Min.: 1
Mult.: 1

PCB Mount

SMD DIP-6

MOSFET

Solid State Relays - PCB Mount 1-Form-A 600V 6-Pin SM T/R

CPC1593GSTR
IXYS Integrated Circuits
1: $6.23
1,752Expected 1/13/2027

Mfr. Part #
CPC1593GSTR

Mouser Part #
849-CPC1593GSTR

IXYS Integrated Circuits

Solid State Relays - PCB Mount 1-Form-A 600V 6-Pin SM T/R

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Datasheet

1,752Expected 1/13/2027

Cut Tape

$6.23

$5.55

$5.30

$5.12

Reel

$4.38

View

MouseReel Available

Min.: 1
Mult.: 1

: 1,000

PCB Mount

SMD DIP-6

MOSFET

Solid State Relays - PCB Mount DC Only Single Pole i4-PAC

CPC1779J
IXYS Integrated Circuits
1: $26.97
100Expected 12/4/2026

Mfr. Part #
CPC1779J

Mouser Part #
849-CPC1779J

IXYS Integrated Circuits

Solid State Relays - PCB Mount DC Only Single Pole i4-PAC

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Datasheet

100Expected 12/4/2026

$26.97

$24.53

$23.41

$22.49

View

Min.: 1
Mult.: 1

PCB Mount

i4-PAC

MOSFET

Triac & SCR Output Optocouplers 400V, 500mA AC Power Switch

CPC1943GS
IXYS Integrated Circuits
1: $13.87
250Expected 11/23/2026

Mfr. Part #
CPC1943GS

Mouser Part #
849-CPC1943GS

IXYS Integrated Circuits

Triac & SCR Output Optocouplers 400V, 500mA AC Power Switch

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Datasheet

250Expected 11/23/2026

$13.87

$9.66

$8.91

$8.41

$8.15

Min.: 1
Mult.: 1

SMD/SMT

SMD-DIP-6

Solid State Relays - PCB Mount Single-Pole Relay 350V 120mA

LCA110LSTR
IXYS Integrated Circuits
1: $4.29
2,000Expected 10/19/2026

Mfr. Part #
LCA110LSTR

Mouser Part #
849-LCA110LSTR

IXYS Integrated Circuits

Solid State Relays - PCB Mount Single-Pole Relay 350V 120mA

Learn More

Datasheet

2,000Expected 10/19/2026

Cut Tape

$4.29

$3.82

$3.65

$3.51

View

Reel

$2.92

MouseReel Available

Min.: 1
Mult.: 1

: 1,000

PCB Mount

SMD DIP-6

MOSFET

Solid State Relays - PCB Mount 1-Form-A 60V 1000 mA SSR w/optic MOSFET

LCA712STR
IXYS Integrated Circuits
1: $10.61
2,000Expected 1/18/2027

Mfr. Part #
LCA712STR

Mouser Part #
849-LCA712STR

IXYS Integrated Circuits

Solid State Relays - PCB Mount 1-Form-A 60V 1000 mA SSR w/optic MOSFET

Learn More

Datasheet

2,000Expected 1/18/2027

Cut Tape

$10.61

$9.45

$9.03

$8.72

View

Reel

$7.23

MouseReel Available

Min.: 1
Mult.: 1

: 1,000

PCB Mount

MOSFET

Solid State Relays - PCB Mount Dual 1-Form-A 400V 250mA SSR

PAA140S
IXYS Integrated Circuits
1: $14.98
1,050On Order

Mfr. Part #
PAA140S

Mouser Part #
849-PAA140S

IXYS Integrated Circuits

Solid State Relays - PCB Mount Dual 1-Form-A 400V 250mA SSR

Learn More

Datasheet

1,050On Order

$14.98

$13.34

$12.74

$12.30

View

Min.: 1
Mult.: 1

PCB Mount

SMD DIP-8

MOSFET

Solid State Relays - PCB Mount Single-Pole Relay 600V 150mA

PLA192S
IXYS Integrated Circuits
1: $7.23
1,825On Order

Mfr. Part #
PLA192S

Mouser Part #
849-PLA192S

IXYS Integrated Circuits

Solid State Relays - PCB Mount Single-Pole Relay 600V 150mA

Learn More

Datasheet

1,825On Order

$7.23

$7.10

$6.31

$5.99

View

Min.: 1
Mult.: 1

PCB Mount

SMD DIP-6

MOSFET

Solid State Relays - PCB Mount Single-Pole Relay 600V 150mA

PLA192STR
IXYS Integrated Circuits
1: $6.77
1,981Expected 8/13/2026

Mfr. Part #
PLA192STR

Mouser Part #
849-PLA192STR

IXYS Integrated Circuits

Solid State Relays - PCB Mount Single-Pole Relay 600V 150mA

Learn More

Datasheet

1,981Expected 8/13/2026

Cut Tape

$6.77

$6.03

$5.76

$5.56

Reel

$4.75

View

MouseReel Available

Min.: 1
Mult.: 1

: 1,000

PCB Mount

SMD DIP-6

MOSFET

Solid State Relays - PCB Mount 250V Single Pole SIP Power Relay

CPC1926Y
IXYS Integrated Circuits
1: $10.76
100Expected 10/16/2026

Mfr. Part #
CPC1926Y

Mouser Part #
849-CPC1926Y

IXYS Integrated Circuits

Solid State Relays - PCB Mount 250V Single Pole SIP Power Relay

Learn More

Datasheet

100Expected 10/16/2026

$10.76

$9.59

$9.15

$8.83

View

Min.: 1
Mult.: 1

PCB Mount

ISOPLUS264

MOSFET

Solid State Relays - PCB Mount SPST-NO 6PIN SMD

PLA140S
IXYS Integrated Circuits
1: $9.29
200Expected 1/8/2027

Mfr. Part #
PLA140S

Mouser Part #
849-PLA140S

IXYS Integrated Circuits

Solid State Relays - PCB Mount SPST-NO 6PIN SMD

Learn More

Datasheet

200Expected 1/8/2027

$9.29

$8.28

$7.91

$7.63

View

Min.: 1
Mult.: 1

PCB Mount

SMD DIP-6

MOSFET

Solid State Relays - PCB Mount 1-Form-A; 600V,120mA 5000Vrms Isolation

CPC1394GV
IXYS Integrated Circuits
500: $2.90
2,200Factory Stock Available

Mfr. Part #
CPC1394GV

Mouser Part #
849-CPC1394GV

IXYS Integrated Circuits

Solid State Relays - PCB Mount 1-Form-A; 600V,120mA 5000Vrms Isolation

Learn More

Datasheet

2,200Factory Stock Available

More Info Available

$2.90

$2.85

Min.: 500
Mult.: 100

Solid State Relays - PCB Mount SP, Normally-Open OptoMOS Relay

CPC1540G
IXYS Integrated Circuits
1: $5.86
950Factory Stock Available

Mfr. Part #
CPC1540G

Mouser Part #
849-CPC1540G

IXYS Integrated Circuits

Solid State Relays - PCB Mount SP, Normally-Open OptoMOS Relay

Learn More

Datasheet

950Factory Stock Available

More Info Available

$5.86

$5.22

$4.99

$4.81

View

Min.: 1
Mult.: 1

Solid State Relays - PCB Mount 600V, 0.5mA AC Power Switch

CPC1963GS
IXYS Integrated Circuits
1: $12.15
2,450Factory Stock Available

Mfr. Part #
CPC1963GS

Mouser Part #
849-CPC1963GS

IXYS Integrated Circuits

Solid State Relays - PCB Mount 600V, 0.5mA AC Power Switch

Learn More

Datasheet

2,450Factory Stock Available

More Info Available

$12.15

$10.82

$10.34

$9.97

View

Min.: 1
Mult.: 1

PCB Mount

SCR

Solid State Relays - PCB Mount 350V 120mA Dual Single-Pole

LAA100LS
IXYS Integrated Circuits
1: $9.83
150Factory Stock Available

Mfr. Part #
LAA100LS

Mouser Part #
849-LAA100LS

IXYS Integrated Circuits

Solid State Relays - PCB Mount 350V 120mA Dual Single-Pole

Learn More

Datasheet

150Factory Stock Available

More Info Available

$9.83

$8.76

$8.37

$8.07

View

Min.: 1
Mult.: 1

PCB Mount

SMD DIP-8

MOSFET

Solid State Relays - PCB Mount Single-Pole Relay 300V 170mA

LCA125S
IXYS Integrated Circuits
1: $7.70
750Factory Stock Available

Mfr. Part #
LCA125S

Mouser Part #
849-LCA125S

IXYS Integrated Circuits

Solid State Relays - PCB Mount Single-Pole Relay 300V 170mA

Learn More

Datasheet

750Factory Stock Available

More Info Available

$7.70

$7.22

$6.73

$5.71

View

Min.: 1
Mult.: 1

PCB Mount

SMD DIP-6

MOSFET

Solid State Relays - PCB Mount Dual 1-Form-A 250V 50mA SSR

OAA160STR
IXYS Integrated Circuits
1,000: $8.22
23,000Factory Stock Available

Mfr. Part #
OAA160STR

Mouser Part #
849-OAA160STR

IXYS Integrated Circuits

Solid State Relays - PCB Mount Dual 1-Form-A 250V 50mA SSR

Learn More

Datasheet

23,000Factory Stock Available

More Info Available

Reel

$8.22

Min.: 1,000
Mult.: 1,000

: 1,000

PCB Mount

SMD DIP-8

MOSFET

Solid State Relays - PCB Mount Dual 1-Form-A 400V 150mA SSR

PAA190S
IXYS Integrated Circuits
100: $9.62
16,150Factory Stock Available

Mfr. Part #
PAA190S

Mouser Part #
849-PAA190S

IXYS Integrated Circuits

Solid State Relays - PCB Mount Dual 1-Form-A 400V 150mA SSR

Learn More

Datasheet

16,150Factory Stock Available

More Info Available

$9.62

$9.43

$9.24

Min.: 100
Mult.: 50

PCB Mount

SMD DIP-8

MOSFET

OptoMOS 1-Form-A (SPST-NO) Solid State Relays

Types of Optocouplers / Photocouplers

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