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 1-Form-A SSR 4-Pin SOP

CPC1006N
IXYS Integrated Circuits
1: $1.80
165,126In Stock

Mfr. Part #
CPC1006N

Mouser Part #
849-CPC1006N

IXYS Integrated Circuits

Solid State Relays - PCB Mount 1-Form-A SSR 4-Pin SOP

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Datasheet

165,126In Stock

$1.80

$1.60

$1.53

$1.48

View

Min.: 1
Mult.: 1

PCB Mount

SOP-4

MOSFET

Solid State Relays - PCB Mount 1-Form-A 60V 400mA Solid State Relay

CPC1014N
IXYS Integrated Circuits
1: $4.58
233,133In Stock

Mfr. Part #
CPC1014N

Mouser Part #
849-CPC1014N

IXYS Integrated Circuits

Solid State Relays - PCB Mount 1-Form-A 60V 400mA Solid State Relay

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Datasheet

233,133In Stock

$4.58

$2.62

$2.58

$2.56

View

Min.: 1
Mult.: 1

PCB Mount

SOP-4

MOSFET

Solid State Relays - PCB Mount SPST NO Relay

CPC1018N
IXYS Integrated Circuits
1: $7.42
46,633In Stock

Mfr. Part #
CPC1018N

Mouser Part #
849-CPC1018N

IXYS Integrated Circuits

Solid State Relays - PCB Mount SPST NO Relay

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Datasheet

46,633In Stock

$7.42

$5.18

$5.10

$5.01

View

Min.: 1
Mult.: 1

PCB Mount

SOP-4

MOSFET

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

CPC1510GSTR
IXYS Integrated Circuits
1: $7.79
10,810In Stock
1,600Expected 2026-07-20

Mfr. Part #
CPC1510GSTR

Mouser Part #
849-CPC1510GSTR

IXYS Integrated Circuits

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

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Datasheet

10,810In Stock

1,600Expected 2026-07-20

Cut Tape

$7.79

$7.55

$7.21

$7.14

Reel

$5.64

View

MouseReel Available

Min.: 1
Mult.: 1

: 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: $21.11
2,034In Stock

Mfr. Part #
PAA191S

Mouser Part #
849-PAA191S

IXYS Integrated Circuits

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

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Datasheet

2,034In Stock

$21.11

$18.81

$17.96

$17.29

View

Min.: 1
Mult.: 1

PCB Mount

SMD DIP-8

MOSFET

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

CPC1008N
IXYS Integrated Circuits
1: $3.72
78,152In Stock

Mfr. Part #
CPC1008N

Mouser Part #
849-CPC1008N

IXYS Integrated Circuits

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

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Datasheet

78,152In Stock

$3.72

$3.44

$3.30

$3.21

View

Min.: 1
Mult.: 1

PCB Mount

SOP-4

MOSFET

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

CPC1035N
IXYS Integrated Circuits
1: $5.04
28,731In Stock

Mfr. Part #
CPC1035N

Mouser Part #
849-CPC1035N

IXYS Integrated Circuits

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

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Datasheet

28,731In Stock

$5.04

$3.69

$3.56

$3.47

View

Min.: 1
Mult.: 1

PCB Mount

SOP-4

MOSFET

Solid State Relays - PCB Mount 1000V Single Pole 1000V Power Relay

CPC1988J
IXYS Integrated Circuits
1: $44.15
708In Stock

Mfr. Part #
CPC1988J

Mouser Part #
849-CPC1988J

IXYS Integrated Circuits

Solid State Relays - PCB Mount 1000V Single Pole 1000V Power Relay

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Datasheet

708In Stock

$44.15

$41.07

$39.83

$38.94

View

Min.: 1
Mult.: 1

PCB Mount

i4-PAC

MOSFET

Solid State Relays - PCB Mount 60V 1000mA Dual Single-Pole

LAA710S
IXYS Integrated Circuits
1: $21.99
5,579In Stock

Mfr. Part #
LAA710S

Mouser Part #
849-LAA710S

IXYS Integrated Circuits

Solid State Relays - PCB Mount 60V 1000mA Dual Single-Pole

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Datasheet

5,579In Stock

$21.99

$20.69

$20.17

$19.38

View

Min.: 1
Mult.: 1

PCB Mount

SMD DIP-8

MOSFET

Solid State Relays - PCB Mount DPST-NO/NO 8PIN DIP

PAA140
IXYS Integrated Circuits
1: $16.80
2,023In Stock

Mfr. Part #
PAA140

Mouser Part #
849-PAA140

IXYS Integrated Circuits

Solid State Relays - PCB Mount DPST-NO/NO 8PIN DIP

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Datasheet

2,023In Stock

$16.80

$15.84

$15.45

$14.70

View

Min.: 1
Mult.: 1

PCB Mount

DIP-8

MOSFET

Solid State Relays - PCB Mount 1000V Single Pole 1000V Power Relay

CPC1986J
IXYS Integrated Circuits
1: $53.28
160In Stock

Mfr. Part #
CPC1986J

Mouser Part #
849-CPC1986J

IXYS Integrated Circuits

Solid State Relays - PCB Mount 1000V Single Pole 1000V Power Relay

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Datasheet

160In Stock

$53.28

$47.66

$45.59

$44.02

View

Min.: 1
Mult.: 1

PCB Mount

i4-PAC

MOSFET

Solid State Relays - PCB Mount Single Pole 1-Form-A, 250V,250mA

PLA171PTR
IXYS Integrated Circuits
1: $8.73
966In Stock

Mfr. Part #
PLA171PTR

Mouser Part #
849-PLA171PTR

IXYS Integrated Circuits

Solid State Relays - PCB Mount Single Pole 1-Form-A, 250V,250mA

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Datasheet

966In Stock

Cut Tape

$8.73

$8.21

$8.02

$7.88

Reel

$7.16

View

MouseReel Available

Min.: 1
Mult.: 1

: 1,000

PCB Mount

SMD DIP-8

MOSFET

Solid State Relays - PCB Mount 250V 200mA Dual Single-Pole

LAA127STR
IXYS Integrated Circuits
1: $16.65
1,129In Stock

Mfr. Part #
LAA127STR

Mouser Part #
849-LAA127STR

IXYS Integrated Circuits

Solid State Relays - PCB Mount 250V 200mA Dual Single-Pole

Learn More

Datasheet

1,129In Stock

Cut Tape

$16.65

$14.83

$14.16

$13.67

View

Reel

$10.67

MouseReel Available

Min.: 1
Mult.: 1

: 1,000

PCB Mount

SMD DIP-8

MOSFET

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

PLA150
IXYS Integrated Circuits
1: $12.53
1,235In Stock

Mfr. Part #
PLA150

Mouser Part #
849-PLA150

IXYS Integrated Circuits

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

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Datasheet

1,235In Stock

$12.53

$11.17

$10.67

$8.57

View

Min.: 1
Mult.: 1

PCB Mount

DIP-6

MOSFET

Solid State Relays - PCB Mount Single Pole 800V, 100mA SSR

PLA171P
IXYS Integrated Circuits
1: $7.52
1,545In Stock

Mfr. Part #
PLA171P

Mouser Part #
849-PLA171P

IXYS Integrated Circuits

Solid State Relays - PCB Mount Single Pole 800V, 100mA SSR

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Datasheet

1,545In Stock

$7.52

$6.75

$6.55

$6.39

View

Min.: 1
Mult.: 1

PCB Mount

SMD DIP-8

MOSFET

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

LAA110LSTR
IXYS Integrated Circuits
1: $11.00
698In Stock

Mfr. Part #
LAA110LSTR

Mouser Part #
849-LAA110LSTR

IXYS Integrated Circuits

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

Learn More

Datasheet

698In Stock

Cut Tape

$11.00

$10.44

$10.20

$10.04

Reel

$8.28

View

MouseReel Available

Min.: 1
Mult.: 1

: 1,000

PCB Mount

SMD DIP-8

MOSFET

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

LCA120STR
IXYS Integrated Circuits
1: $7.39
2,660In Stock

Mfr. Part #
LCA120STR

Mouser Part #
849-LCA120STR

IXYS Integrated Circuits

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

Learn More

Datasheet

2,660In Stock

Cut Tape

$7.39

$6.96

$6.80

$6.68

Reel

$5.36

View

MouseReel Available

Min.: 1
Mult.: 1

: 1,000

PCB Mount

SMD DIP-6

MOSFET

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

PAA110S
IXYS Integrated Circuits
1: $19.77
241In Stock

Mfr. Part #
PAA110S

Mouser Part #
849-PAA110S

IXYS Integrated Circuits

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

Learn More

Datasheet

241In Stock

$19.77

$17.61

$16.82

$13.84

View

Min.: 1
Mult.: 1

PCB Mount

SMD DIP-8

MOSFET

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

PAA150S
IXYS Integrated Circuits
1: $20.06
337In Stock

Mfr. Part #
PAA150S

Mouser Part #
849-PAA150S

IXYS Integrated Circuits

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

Learn More

Datasheet

337In Stock

$20.06

$17.87

$17.06

$16.43

$12.25

Min.: 1
Mult.: 1

PCB Mount

SMD DIP-8

MOSFET

Solid State Relays - PCB Mount 600V 90mA Single OptoMOS Relay

CPC1393GR
IXYS Integrated Circuits
1: $6.84
692In Stock

Mfr. Part #
CPC1393GR

Mouser Part #
849-CPC1393GR

IXYS Integrated Circuits

Solid State Relays - PCB Mount 600V 90mA Single OptoMOS Relay

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Datasheet

692In Stock

$6.84

$6.11

$5.83

$5.63

View

Min.: 1
Mult.: 1

PCB Mount

SMD DIP-4

MOSFET

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

CPC1727J
IXYS Integrated Circuits
1: $27.75
475In Stock

Mfr. Part #
CPC1727J

Mouser Part #
849-CPC1727J

IXYS Integrated Circuits

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

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Datasheet

475In Stock

$27.75

$25.63

$24.83

$24.13

View

Min.: 1
Mult.: 1

PCB Mount

i4-PAC

MOSFET

Solid State Relays - PCB Mount 1-Form-A 350V 120mA Solid State Relay

CPC1230NTR
IXYS Integrated Circuits
1: $4.92
3,560In Stock

Mfr. Part #
CPC1230NTR

Mouser Part #
849-CPC1230NTR

IXYS Integrated Circuits

Solid State Relays - PCB Mount 1-Form-A 350V 120mA Solid State Relay

Learn More

Datasheet

3,560In Stock

Cut Tape

$4.92

$4.39

$4.19

$4.00

View

Reel

$2.79

MouseReel Available

Min.: 1
Mult.: 1

: 2,000

PCB Mount

SOP-4

MOSFET

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

CPC1777J
IXYS Integrated Circuits
1: $30.36
196In Stock

Mfr. Part #
CPC1777J

Mouser Part #
849-CPC1777J

IXYS Integrated Circuits

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

Learn More

Datasheet

196In Stock

$30.36

$27.04

$25.79

$24.84

View

Min.: 1
Mult.: 1

PCB Mount

i4-PAC

MOSFET

Solid State Relays - PCB Mount 250V 200mA Dual Single-Pole

LAA127S
IXYS Integrated Circuits
1: $13.78
298In Stock

Mfr. Part #
LAA127S

Mouser Part #
849-LAA127S

IXYS Integrated Circuits

Solid State Relays - PCB Mount 250V 200mA Dual Single-Pole

Learn More

Datasheet

298In Stock

$13.78

$12.87

$12.47

$12.23

View

Min.: 1
Mult.: 1

PCB Mount

SMD DIP-8

MOSFET

Solid State Relays - PCB Mount SPST i4-PAC 60V

CPC1908J
IXYS Integrated Circuits
1: $30.50
200In Stock

Mfr. Part #
CPC1908J

Mouser Part #
849-CPC1908J

IXYS Integrated Circuits

Solid State Relays - PCB Mount SPST i4-PAC 60V

Learn More

Datasheet

200In Stock

$30.50

$27.17

$25.91

$24.97

View

Min.: 1
Mult.: 1

PCB Mount

ISOPLUS264

MOSFET

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

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