Optocouplers / Photocouplers

.hide-partial { max-height: none; } .show-more { display: none; }

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.

.catnav-wrapper { height: auto; overflow: visible; } .catalog-nav-tabs ul { white-space: normal; }

Types of Optocouplers / Photocouplers

List Images

Results: 275

Applied Filters:

Mounting Style

Package / Case

Number of Channels

Output Type

Reset All

Search within results

In Stock

Normally Stocked

Active

New Products

RoHS Compliant

.search-refine-wrapper { display: inline-block; min-width: 100%; } .scroll-body { overflow-x: visible; } .search-table-wrapper { overflow: visible; } .hide-partial { max-height: none; } .show-more { display: none; }

Part #

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

CPC1390GR
IXYS Integrated Circuits
1: $4.36
600Expected 12/14/2026
End of Life

Mfr. Part #
CPC1390GR

Mouser Part #
849-CPC1390GR

End of Life

IXYS Integrated Circuits

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

Learn More

Datasheet

600Expected 12/14/2026

$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; 600V,120mA 5000Vrms Isolation

CPC1394G
IXYS Integrated Circuits
1: $4.75
500Expected 6/7/2027
End of Life

Mfr. Part #
CPC1394G

Mouser Part #
849-CPC1394G

End of Life

IXYS Integrated Circuits

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

Learn More

Datasheet

500Expected 6/7/2027

$4.75

$4.24

$4.05

$3.91

View

Min.: 1
Mult.: 1

PCB Mount

DIP-4

MOSFET

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

CPC1510GS
IXYS Integrated Circuits
1: $6.94
1,782Expected 10/16/2026
End of Life

Mfr. Part #
CPC1510GS

Mouser Part #
849-CPC1510GS

End of Life

IXYS Integrated Circuits

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

Learn More

Datasheet

1,782Expected 10/16/2026

$6.94

$6.09

$5.80

$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
End of Life

Mfr. Part #
CPC1563GS

Mouser Part #
849-CPC1563GS

End of Life

IXYS Integrated Circuits

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

Learn More

Datasheet

1,100Expected 1/1/2027

$6.47

$5.77

$5.51

$5.32

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
End of Life

Mfr. Part #
CPC1593GSTR

Mouser Part #
849-CPC1593GSTR

End of Life

IXYS Integrated Circuits

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

Learn More

Datasheet

1,752Expected 1/13/2027

Cut Tape

$6.23

$5.55

$5.30

$5.12

Reel

$4.39

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: $27.54
100On Order
End of Life

Mfr. Part #
CPC1779J

Mouser Part #
849-CPC1779J

End of Life

IXYS Integrated Circuits

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

Learn More

Datasheet

100On Order

$27.54

$24.54

$23.42

$22.62

Min.: 1
Mult.: 1

PCB Mount

i4-PAC

MOSFET

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

CPC1788J
IXYS Integrated Circuits
1: $28.34
380On Order
End of Life

Mfr. Part #
CPC1788J

Mouser Part #
849-CPC1788J

End of Life

IXYS Integrated Circuits

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

Learn More

Datasheet

380On Order

$28.34

$25.70

$24.48

$19.65

Min.: 1
Mult.: 1

PCB Mount

i4-PAC

MOSFET

Solid State Relays - PCB Mount SPST-NO 4PIN SIP

CPC1906Y
IXYS Integrated Circuits
1: $12.51
276Expected 12/11/2026
End of Life

Mfr. Part #
CPC1906Y

Mouser Part #
849-CPC1906Y

End of Life

IXYS Integrated Circuits

Solid State Relays - PCB Mount SPST-NO 4PIN SIP

Learn More

Datasheet

276Expected 12/11/2026

$12.51

$11.15

$10.65

$10.29

View

Min.: 1
Mult.: 1

PCB Mount

ISOPLUS264

MOSFET

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

CPC1943GS
IXYS Integrated Circuits
1: $12.57
250Expected 11/23/2026
End of Life

Mfr. Part #
CPC1943GS

Mouser Part #
849-CPC1943GS

End of Life

IXYS Integrated Circuits

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

Learn More

Datasheet

250Expected 11/23/2026

$12.57

$10.33

$9.53

$9.20

Min.: 1
Mult.: 1

SMD/SMT

SMD-DIP-6

Solid State Relays - PCB Mount Dual Power Relay 60V, 1-Form-A

CPC2907B
IXYS Integrated Circuits
1: $20.13
425Expected 1/25/2027
End of Life

Mfr. Part #
CPC2907B

Mouser Part #
849-CPC2907B

End of Life

IXYS Integrated Circuits

Solid State Relays - PCB Mount Dual Power Relay 60V, 1-Form-A

Learn More

Datasheet

425Expected 1/25/2027

$20.13

$17.93

$17.12

$16.54

$15.97

Min.: 1
Mult.: 1

PCB Mount

SOIC-8

MOSFET

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

LCA110LSTR
IXYS Integrated Circuits
1: $4.29
2,000Expected 11/16/2026
End of Life

Mfr. Part #
LCA110LSTR

Mouser Part #
849-LCA110LSTR

End of Life

IXYS Integrated Circuits

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

Learn More

Datasheet

2,000Expected 11/16/2026

Cut Tape

$4.29

$3.82

$3.65

$3.53

View

Reel

$3.03

MouseReel Available

Min.: 1
Mult.: 1

: 1,000

PCB Mount

SMD DIP-6

MOSFET

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

PLA140S
IXYS Integrated Circuits
1: $9.29
200Expected 1/25/2027

Mfr. Part #
PLA140S

Mouser Part #
849-PLA140S

IXYS Integrated Circuits

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

Learn More

Datasheet

200Expected 1/25/2027

$9.29

$8.28

$7.91

$7.64

View

Min.: 1
Mult.: 1

PCB Mount

SMD DIP-6

MOSFET

Solid State Relays - PCB Mount 1-Form-A 400V 120mA Solid State Relay

CPC1225N
IXYS Integrated Circuits
1: $3.35
501Expected 11/25/2026
End of Life

Mfr. Part #
CPC1225N

Mouser Part #
849-CPC1225N

End of Life

IXYS Integrated Circuits

Solid State Relays - PCB Mount 1-Form-A 400V 120mA Solid State Relay

Learn More

Datasheet

501Expected 11/25/2026

$3.35

$3.30

$3.15

$3.03

View

Min.: 1
Mult.: 1

PCB Mount

SOP-4

MOSFET

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

CPC1926Y
IXYS Integrated Circuits
1: $10.76
200Expected 10/16/2026
End of Life

Mfr. Part #
CPC1926Y

Mouser Part #
849-CPC1926Y

End of Life

IXYS Integrated Circuits

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

Learn More

Datasheet

200Expected 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 SP-NO SS OptoMOS Power Relay

CPC1983B
IXYS Integrated Circuits
1: $10.50
140On Order
End of Life

Mfr. Part #
CPC1983B

Mouser Part #
849-CPC1983B

End of Life

IXYS Integrated Circuits

Solid State Relays - PCB Mount SP-NO SS OptoMOS Power Relay

Learn More

Datasheet

140On Order

$10.50

$9.36

$8.93

$8.62

View

Min.: 1
Mult.: 1

PCB Mount

MOSFET

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

OAA160STR
IXYS Integrated Circuits
1,000: $8.25
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

$8.25

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: $10.50
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

$10.50

Min.: 100
Mult.: 50

PCB Mount

SMD DIP-8

MOSFET

Solid State Relays - PCB Mount Single-Pole Relay 400V 150mA

PLA110LS
IXYS Integrated Circuits
1: $8.32
550Factory Stock Available

Mfr. Part #
PLA110LS

Mouser Part #
849-PLA110LS

IXYS Integrated Circuits

Solid State Relays - PCB Mount Single-Pole Relay 400V 150mA

Learn More

Datasheet

550Factory Stock Available

More Info Available

$8.32

$7.80

$7.28

$6.17

$6.08

Min.: 1
Mult.: 1

PCB Mount

SMD DIP-6

MOSFET

Solid State Relays - PCB Mount Single-Pole Relay 400V 150mA

PLA190S
IXYS Integrated Circuits
1: $8.38
550Factory Stock Available

Mfr. Part #
PLA190S

Mouser Part #
849-PLA190S

IXYS Integrated Circuits

Solid State Relays - PCB Mount Single-Pole Relay 400V 150mA

Learn More

Datasheet

550Factory Stock Available

More Info Available

$8.38

$7.47

$7.14

$6.88

View

Min.: 1
Mult.: 1

PCB Mount

SMD DIP-6

MOSFET

Solid State Relays - PCB Mount Single-Pole Relay 400V 150mA

PLA190STR
IXYS Integrated Circuits
1,000: $5.60
12,000Factory Stock Available

Mfr. Part #
PLA190STR

Mouser Part #
849-PLA190STR

IXYS Integrated Circuits

Solid State Relays - PCB Mount Single-Pole Relay 400V 150mA

Learn More

Datasheet

12,000Factory Stock Available

More Info Available

Reel

$5.60

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

: 1,000

PCB Mount

SMD DIP-6

MOSFET

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

PAA191S
IXYS Integrated Circuits
1: $14.66
Non-Stocked Lead-Time 36 Weeks

Mfr. Part #
PAA191S

Mouser Part #
849-PAA191S

IXYS Integrated Circuits

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

Learn More

Datasheet

Non-Stocked Lead-Time 36 Weeks

$14.66

$13.06

$12.47

$12.01

$9.08

Min.: 1
Mult.: 1

PCB Mount

SMD DIP-8

MOSFET

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

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

Mfr. Part #
CPC1540G

Mouser Part #
849-CPC1540G

End of Life

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
1,650Factory Stock Available
End of Life

Mfr. Part #
CPC1963GS

Mouser Part #
849-CPC1963GS

End of Life

IXYS Integrated Circuits

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

Learn More

Datasheet

1,650Factory 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 250V 170mA Dual Single-Pole

LAA120STR
IXYS Integrated Circuits
1: $8.57
1,000Factory Stock Available
End of Life

Mfr. Part #
LAA120STR

Mouser Part #
849-LAA120STR

End of Life

IXYS Integrated Circuits

Solid State Relays - PCB Mount 250V 170mA Dual Single-Pole

Learn More

Datasheet

1,000Factory Stock Available

More Info Available

Cut Tape

$8.57

$7.64

$7.30

$7.05

View

Reel

$6.07

MouseReel Available

Min.: 1
Mult.: 1

: 1,000

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
End of Life

Mfr. Part #
LCA125S

Mouser Part #
849-LCA125S

End of Life

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

$5.65

Min.: 1
Mult.: 1

PCB Mount

SMD DIP-6

MOSFET

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

Types of Optocouplers / Photocouplers

Customer Service Office

Company

Resources

Support