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: 298

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Part #

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

PLA140S
IXYS Integrated Circuits
1: $7.44
208In Stock
150Expected 2026-04-23

Mfr. Part #
PLA140S

Mouser Part #
849-PLA140S

IXYS Integrated Circuits

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

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Datasheet

208In Stock

150Expected 2026-04-23

$7.44

$6.34

$6.11

$5.91

View

Min.: 1
Mult.: 1

PCB Mount

SMD DIP-6

MOSFET

Solid State Relays - PCB Mount Single-Pole Relay 600V 100mA

PLA143
IXYS Integrated Circuits
1: $6.06
30In Stock

Mfr. Part #
PLA143

Mouser Part #
849-PLA143

IXYS Integrated Circuits

Solid State Relays - PCB Mount Single-Pole Relay 600V 100mA

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Datasheet

30In Stock

$6.06

$5.69

$5.25

$4.45

View

Min.: 1
Mult.: 1

PCB Mount

DIP-6

MOSFET

Solid State Relays - PCB Mount Single-Pole Relay 600V 100mA

PLA143S
IXYS Integrated Circuits
1: $5.89
244In Stock

Mfr. Part #
PLA143S

Mouser Part #
849-PLA143S

IXYS Integrated Circuits

Solid State Relays - PCB Mount Single-Pole Relay 600V 100mA

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Datasheet

244In Stock

$5.89

$4.85

$4.65

$4.11

Min.: 1
Mult.: 1

PCB Mount

SMD DIP-6

MOSFET

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

PLA150S
IXYS Integrated Circuits
1: $6.39
137In Stock

Mfr. Part #
PLA150S

Mouser Part #
849-PLA150S

IXYS Integrated Circuits

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

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Datasheet

137In Stock

$6.39

$6.26

$5.98

$5.75

View

Min.: 1
Mult.: 1

PCB Mount

SMD DIP-6

MOSFET

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

PLA160
IXYS Integrated Circuits
1: $6.93
219In Stock

Mfr. Part #
PLA160

Mouser Part #
849-PLA160

IXYS Integrated Circuits

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

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Datasheet

219In Stock

$6.93

$6.18

$5.91

$5.35

View

Min.: 1
Mult.: 1

PCB Mount

DIP-6

MOSFET

Solid State Relays - PCB Mount Single-Pole Relay 300V 50mA

PLA160S
IXYS Integrated Circuits
1: $6.93
294In Stock

Mfr. Part #
PLA160S

Mouser Part #
849-PLA160S

IXYS Integrated Circuits

Solid State Relays - PCB Mount Single-Pole Relay 300V 50mA

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Datasheet

294In Stock

$6.93

$6.18

$5.91

$5.53

View

Min.: 1
Mult.: 1

PCB Mount

SMD DIP-6

MOSFET

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

PLA170S
IXYS Integrated Circuits
1: $5.36
251In Stock
700Expected 2026-06-25

Mfr. Part #
PLA170S

Mouser Part #
849-PLA170S

IXYS Integrated Circuits

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

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Datasheet

251In Stock

700Expected 2026-06-25

$5.36

$4.79

$4.57

$4.40

View

Min.: 1
Mult.: 1

PCB Mount

SMD DIP-6

MOSFET

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

PLA171PTR
IXYS Integrated Circuits
1: $5.67
16In Stock
1,000Expected 2026-06-16

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

16In Stock

1,000Expected 2026-06-16

Cut Tape

$5.67

$5.05

$4.84

$4.65

Reel

$4.00

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 1,000

PCB Mount

SMD DIP-8

MOSFET

Solid State Relays - PCB Mount 800V Normally-Open 6-Pin OptoMOS Relay

PLA172P
IXYS Integrated Circuits
1: $8.60
130In Stock

Mfr. Part #
PLA172P

Mouser Part #
849-PLA172P

IXYS Integrated Circuits

Solid State Relays - PCB Mount 800V Normally-Open 6-Pin OptoMOS Relay

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Datasheet

130In Stock

$8.60

$8.06

$7.16

$6.82

View

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: $6.71
330In Stock

Mfr. Part #
PLA190S

Mouser Part #
849-PLA190S

IXYS Integrated Circuits

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

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Datasheet

330In Stock

$6.71

$5.98

$5.72

$5.50

View

Min.: 1
Mult.: 1

PCB Mount

SMD DIP-6

MOSFET

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

PLA191
IXYS Integrated Circuits
1: $7.98
34In Stock

Mfr. Part #
PLA191

Mouser Part #
849-PLA191

IXYS Integrated Circuits

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

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Datasheet

34In Stock

$7.98

$6.32

$5.84

$5.16

View

Min.: 1
Mult.: 1

PCB Mount

DIP-6

MOSFET

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

PLA191S
IXYS Integrated Circuits
1: $7.61
218In Stock

Mfr. Part #
PLA191S

Mouser Part #
849-PLA191S

IXYS Integrated Circuits

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

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Datasheet

218In Stock

$7.61

$6.79

$6.49

$5.60

View

Min.: 1
Mult.: 1

PCB Mount

SMD DIP-6

MOSFET

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

PLA192S
IXYS Integrated Circuits
1: $5.58
379In Stock

Mfr. Part #
PLA192S

Mouser Part #
849-PLA192S

IXYS Integrated Circuits

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

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Datasheet

379In Stock

$5.58

$4.56

$4.48

$4.15

View

Min.: 1
Mult.: 1

PCB Mount

SMD DIP-6

MOSFET

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

PLA193
IXYS Integrated Circuits
1: $5.15
61In Stock

Mfr. Part #
PLA193

Mouser Part #
849-PLA193

IXYS Integrated Circuits

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

Learn More

Datasheet

61In Stock

$5.15

$4.23

$4.08

$3.78

View

Min.: 1
Mult.: 1

PCB Mount

DIP-6

MOSFET

Solid State Relays - PCB Mount Single-Pole Relay 600V 100mA

PLA193S
IXYS Integrated Circuits
1: $5.30
294In Stock

Mfr. Part #
PLA193S

Mouser Part #
849-PLA193S

IXYS Integrated Circuits

Solid State Relays - PCB Mount Single-Pole Relay 600V 100mA

Learn More

Datasheet

294In Stock

$5.30

$4.22

$4.01

$3.80

View

Min.: 1
Mult.: 1

PCB Mount

SMD DIP-6

MOSFET

Solid State Relays - PCB Mount 1-Form-A 600V 100mA 5000Vrms Isolation

PLA194S
IXYS Integrated Circuits
1: $5.58
5In Stock

Mfr. Part #
PLA194S

Mouser Part #
849-PLA194S

IXYS Integrated Circuits

Solid State Relays - PCB Mount 1-Form-A 600V 100mA 5000Vrms Isolation

Learn More

Datasheet

5In Stock

$5.58

$4.42

$4.17

$3.70

View

Min.: 1
Mult.: 1

PCB Mount

SMD DIP-6

MOSFET

Solid State Relays - PCB Mount 350V 100mA Dual-Sing OptoMOS Relay

XAA170
IXYS Integrated Circuits
1: $7.32
90In Stock

Mfr. Part #
XAA170

Mouser Part #
849-XAA170

IXYS Integrated Circuits

Solid State Relays - PCB Mount 350V 100mA Dual-Sing OptoMOS Relay

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Datasheet

90In Stock

$7.32

$6.87

$6.71

$5.27

View

Min.: 1
Mult.: 1

PCB Mount

DIP-8

MOSFET

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

XCA170
IXYS Integrated Circuits
1: $3.58
104In Stock

Mfr. Part #
XCA170

Mouser Part #
849-XCA170

IXYS Integrated Circuits

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

Learn More

Datasheet

104In Stock

$3.58

$3.21

$3.07

$2.95

View

Min.: 1
Mult.: 1

PCB Mount

DIP-6

MOSFET

Solid State Relays - PCB Mount AC SS Power Switch Dual Power SCR Out

CPC1964BX6
IXYS Integrated Circuits
1: $7.44
15In Stock

Mfr. Part #
CPC1964BX6

Mouser Part #
849-CPC1964BX6

IXYS Integrated Circuits

Solid State Relays - PCB Mount AC SS Power Switch Dual Power SCR Out

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Datasheet

15In Stock

$7.44

$5.15

View

Min.: 1
Mult.: 1

PCB Mount

SCR

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

CPC1510GSTR
IXYS Integrated Circuits
1: $5.29
14,780On Order

Mfr. Part #
CPC1510GSTR

Mouser Part #
849-CPC1510GSTR

IXYS Integrated Circuits

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

Learn More

Datasheet

14,780On Order

Cut Tape

$5.29

$4.84

$4.45

$4.29

View

Reel

$3.69

MouseReel Available

Min.: 1
Mult.: 1

Reel: 1,000

PCB Mount

SMD DIP-6

MOSFET

Solid State Relays - PCB Mount AC Switch 3A, 600V

CPC1966Y
IXYS Integrated Circuits
1: $6.88
8,465Expected 2026-04-16

Mfr. Part #
CPC1966Y

Mouser Part #
849-CPC1966Y

IXYS Integrated Circuits

Solid State Relays - PCB Mount AC Switch 3A, 600V

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Datasheet

8,465Expected 2026-04-16

$6.88

$6.14

$5.67

$5.47

View

Min.: 1
Mult.: 1

PCB Mount

SIP-4

SCR

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

LCA712STR
IXYS Integrated Circuits
1: $8.22
5,000Expected 2026-04-02

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

5,000Expected 2026-04-02

Cut Tape

$8.22

$7.58

$7.24

$6.99

Reel

$5.61

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 1,000

PCB Mount

MOSFET

Solid State Relays - PCB Mount 600V, 1A AC Solid State Relay

CPC1965G
IXYS Integrated Circuits
1: $6.79
14,426On Order

Mfr. Part #
CPC1965G

Mouser Part #
849-CPC1965G

IXYS Integrated Circuits

Solid State Relays - PCB Mount 600V, 1A AC Solid State Relay

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Datasheet

14,426On Order

$6.79

$6.05

$5.67

$5.53

View

Min.: 1
Mult.: 1

PCB Mount

SCR

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

CPC1393G
IXYS Integrated Circuits
1: $3.80
1,200Expected 2026-08-17

Mfr. Part #
CPC1393G

Mouser Part #
849-CPC1393G

IXYS Integrated Circuits

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

Learn More

Datasheet

1,200Expected 2026-08-17

$3.80

$3.39

$3.24

$3.13

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: $5.46
2,100Expected 2026-05-19

Mfr. Part #
CPC1510GS

Mouser Part #
849-CPC1510GS

IXYS Integrated Circuits

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

Learn More

Datasheet

2,100Expected 2026-05-19

$5.46

$4.50

$4.34

$4.14

$4.00

Min.: 1
Mult.: 1

PCB Mount

SMD DIP-6

MOSFET

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

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