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 350V 120mA Dual Single-Pole

LAA110LSTR
IXYS Integrated Circuits
1: S/29.74
698In Stock

Mfr. Part #
LAA110LSTR

Mouser Part #
849-LAA110LSTR

IXYS Integrated Circuits

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

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Datasheet

698In Stock

Cut Tape

S/29.74

S/28.22

S/27.56

S/27.13

Reel

S/22.38

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: S/19.97
2,596In Stock

Mfr. Part #
LCA120STR

Mouser Part #
849-LCA120STR

IXYS Integrated Circuits

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

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Datasheet

2,596In Stock

Cut Tape

S/19.97

S/18.80

S/18.37

S/18.06

Reel

S/14.48

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: S/53.44
241In Stock

Mfr. Part #
PAA110S

Mouser Part #
849-PAA110S

IXYS Integrated Circuits

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

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Datasheet

241In Stock

S/53.44

S/47.61

S/45.46

S/37.41

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: S/54.22
317In Stock

Mfr. Part #
PAA150S

Mouser Part #
849-PAA150S

IXYS Integrated Circuits

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

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Datasheet

317In Stock

S/54.22

S/48.31

S/46.13

S/44.41

S/33.13

Min.: 1
Mult.: 1

PCB Mount

SMD DIP-8

MOSFET

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

CPC1330G
IXYS Integrated Circuits
1: S/15.22
439In Stock
100Expected 12/2/2026

Mfr. Part #
CPC1330G

Mouser Part #
849-CPC1330G

IXYS Integrated Circuits

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

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Datasheet

439In Stock

100Expected 12/2/2026

S/15.22

S/14.29

S/12.69

S/12.11

View

Min.: 1
Mult.: 1

PCB Mount

DIP-4

MOSFET

Solid State Relays - PCB Mount RELAY, SS ICS

CPC1561BTR
IXYS Integrated Circuits
1: S/44.18
3In Stock
1,000Expected 10/9/2026

Mfr. Part #
CPC1561BTR

Mouser Part #
849-CPC1561BTR

IXYS Integrated Circuits

Solid State Relays - PCB Mount RELAY, SS ICS

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Datasheet

3In Stock

1,000Expected 10/9/2026

Cut Tape

S/44.18

S/36.59

S/33.94

S/32.89

View

Reel

S/27.71

MouseReel Available

Min.: 1
Mult.: 1

: 1,000

PCB Mount

SOIC-16

MOSFET

Solid State Relays - PCB Mount 100V 300mA Double Pole Relay

LAA108S
IXYS Integrated Circuits
1: S/20.71
274In Stock

Mfr. Part #
LAA108S

Mouser Part #
849-LAA108S

IXYS Integrated Circuits

Solid State Relays - PCB Mount 100V 300mA Double Pole Relay

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Datasheet

274In Stock

S/20.71

S/18.49

S/17.63

S/17.01

View

Min.: 1
Mult.: 1

PCB Mount

SMD DIP-8

MOSFET

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

PLA143S
IXYS Integrated Circuits
1: S/22.65
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

S/22.65

S/21.06

S/20.44

S/19.85

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: S/33.67
213In 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

213In Stock

S/33.67

S/30.01

S/28.65

S/27.64

View

Min.: 1
Mult.: 1

PCB Mount

DIP-6

MOSFET

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

PAA191
IXYS Integrated Circuits
1: S/56.83
96In Stock

Mfr. Part #
PAA191

Mouser Part #
849-PAA191

IXYS Integrated Circuits

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

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Datasheet

96In Stock

S/56.83

S/50.64

S/48.34

S/46.71

View

Min.: 1
Mult.: 1

PCB Mount

SMD DIP-8

MOSFET

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

PLA143STR
IXYS Integrated Circuits
1: S/20.67
318In Stock

Mfr. Part #
PLA143STR

Mouser Part #
849-PLA143STR

IXYS Integrated Circuits

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

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Datasheet

318In Stock

Cut Tape

S/20.67

S/20.55

S/20.36

S/20.28

Reel

S/17.48

View

MouseReel Available

Min.: 1
Mult.: 1

: 1,000

PCB Mount

SMD DIP-6

MOSFET

Triac & SCR Output Optocouplers 250V Single Pole SIP Power Relay

CPC1972G
IXYS Integrated Circuits
1: S/11.41
424In Stock

Mfr. Part #
CPC1972G

Mouser Part #
849-CPC1972G

IXYS Integrated Circuits

Triac & SCR Output Optocouplers 250V Single Pole SIP Power Relay

Learn More

Datasheet

424In Stock

S/11.41

S/7.79

S/7.67

S/7.47

S/7.40

Min.: 1
Mult.: 1

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

LAA100L
IXYS Integrated Circuits
1: S/41.81
149In Stock

Mfr. Part #
LAA100L

Mouser Part #
849-LAA100L

IXYS Integrated Circuits

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

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Datasheet

149In Stock

S/41.81

S/39.20

S/36.86

S/31.30

S/28.65

Min.: 1
Mult.: 1

PCB Mount

DIP-8

MOSFET

Solid State Relays - PCB Mount Single 1-Form-A 250V 50mA relay

OMA160
IXYS Integrated Circuits
1: S/25.89
234In Stock

Mfr. Part #
OMA160

Mouser Part #
849-OMA160

IXYS Integrated Circuits

Solid State Relays - PCB Mount Single 1-Form-A 250V 50mA relay

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Datasheet

234In Stock

S/25.89

S/19.03

S/18.37

S/17.52

View

Min.: 1
Mult.: 1

PCB Mount

DIP-6

MOSFET

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

PLA172P
IXYS Integrated Circuits
1: S/39.51
122In 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

122In Stock

S/39.51

S/35.19

S/33.63

S/31.76

View

Min.: 1
Mult.: 1

PCB Mount

SMD DIP-6

MOSFET

Solid State Relays - PCB Mount 350V 170mA Dual Single-Pole

LAA125S
IXYS Integrated Circuits
1: S/27.40
152In Stock

Mfr. Part #
LAA125S

Mouser Part #
849-LAA125S

IXYS Integrated Circuits

Solid State Relays - PCB Mount 350V 170mA Dual Single-Pole

Learn More

Datasheet

152In Stock

S/27.40

S/25.61

S/24.91

S/24.87

S/24.64

Min.: 1
Mult.: 1

PCB Mount

SMD DIP-8

MOSFET

Solid State Relays - PCB Mount RELAY OPTO 170MA SP-NO 6-SMD

LCA125
IXYS Integrated Circuits
1: S/23.00
160In Stock

Mfr. Part #
LCA125

Mouser Part #
849-LCA125

IXYS Integrated Circuits

Solid State Relays - PCB Mount RELAY OPTO 170MA SP-NO 6-SMD

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Datasheet

160In Stock

S/23.00

S/21.37

S/19.97

S/19.27

S/18.37

Min.: 1
Mult.: 1

PCB Mount

DIP-6

MOSFET

Triac & SCR Output Optocouplers 250V Single Pole SIP Power Relay

CPC1972GS
IXYS Integrated Circuits
1: S/11.41
489In Stock

Mfr. Part #
CPC1972GS

Mouser Part #
849-CPC1972GS

IXYS Integrated Circuits

Triac & SCR Output Optocouplers 250V Single Pole SIP Power Relay

Learn More

Datasheet

489In Stock

S/11.41

S/9.38

S/8.60

S/7.55

View

Min.: 1
Mult.: 1

SMD/SMT

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

PLA193S
IXYS Integrated Circuits
1: S/25.03
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

S/25.03

S/22.27

S/21.29

S/20.55

View

Min.: 1
Mult.: 1

PCB Mount

SMD DIP-6

MOSFET

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

CPC1006NTR
IXYS Integrated Circuits
1: S/8.95
37,807In Stock

Mfr. Part #
CPC1006NTR

Mouser Part #
849-CPC1006NTR

IXYS Integrated Circuits

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

Learn More

Datasheet

37,807In Stock

Cut Tape

S/8.95

S/8.02

S/7.63

S/7.36

Reel

S/5.92

View

MouseReel Available

Min.: 1
Mult.: 1

: 2,000

PCB Mount

SOP-4

MOSFET

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

CPC1014NTR
IXYS Integrated Circuits
1: S/11.79
37,829In Stock
38,000Expected 10/23/2026

Mfr. Part #
CPC1014NTR

Mouser Part #
849-CPC1014NTR

IXYS Integrated Circuits

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

Learn More

Datasheet

37,829In Stock

38,000Expected 10/23/2026

Cut Tape

S/11.79

S/10.55

S/10.00

S/9.69

Reel

S/7.79

View

MouseReel Available

Min.: 1
Mult.: 1

: 2,000

PCB Mount

SOP-4

MOSFET

Solid State Relays - PCB Mount SPNO RELAY

CPC1017N
IXYS Integrated Circuits
1: S/3.35
300,353In Stock

Mfr. Part #
CPC1017N

Mouser Part #
849-CPC1017N

IXYS Integrated Circuits

Solid State Relays - PCB Mount SPNO RELAY

Learn More

Datasheet

300,353In Stock

S/3.35

S/2.99

S/2.88

S/2.30

View

Min.: 1
Mult.: 1

PCB Mount

SOP-4

MOSFET

Solid State Relays - PCB Mount 1-Form-A 60V 100mA Solid State Relay

CPC1017NTR
IXYS Integrated Circuits
1: S/7.51
60,098In Stock
68,000Expected 10/19/2026

Mfr. Part #
CPC1017NTR

Mouser Part #
849-CPC1017NTR

IXYS Integrated Circuits

Solid State Relays - PCB Mount 1-Form-A 60V 100mA Solid State Relay

Learn More

Datasheet

60,098In Stock

68,000Expected 10/19/2026

Cut Tape

S/7.51

S/6.73

S/6.42

S/6.19

Reel

S/4.98

View

MouseReel Available

Min.: 1
Mult.: 1

: 2,000

PCB Mount

SOP-4

MOSFET

Solid State Relays - PCB Mount 1-Form-A 60V 600mA Solid State Relay

CPC1018NTR
IXYS Integrated Circuits
1: S/19.15
32,346In Stock

Mfr. Part #
CPC1018NTR

Mouser Part #
849-CPC1018NTR

IXYS Integrated Circuits

Solid State Relays - PCB Mount 1-Form-A 60V 600mA Solid State Relay

Learn More

Datasheet

32,346In Stock

Cut Tape

S/19.15

S/17.05

S/16.31

S/15.73

View

Reel

S/13.04

MouseReel Available

Min.: 1
Mult.: 1

: 2,000

PCB Mount

SOP-4

MOSFET

Solid State Relays - PCB Mount 1-Form-A 60V 750mA Solid State Relay

CPC1019N
IXYS Integrated Circuits
1: S/15.30
9,082In Stock

Mfr. Part #
CPC1019N

Mouser Part #
849-CPC1019N

IXYS Integrated Circuits

Solid State Relays - PCB Mount 1-Form-A 60V 750mA Solid State Relay

Learn More

Datasheet

9,082In Stock

S/15.30

S/14.99

S/14.01

S/13.43

View

Min.: 1
Mult.: 1

PCB Mount

SOP-4

MOSFET

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

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