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: 298

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 250V 200mA Dual Single-Pole

LAA127LS
IXYS Integrated Circuits
1: $12.56
90In Stock

Mfr. Part No.
LAA127LS

Mouser Part No
849-LAA127LS

IXYS Integrated Circuits

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

Learn More

Datasheet

90In Stock

$12.56

$11.16

$10.61

$10.05

View

Min.: 1
Mult.: 1

PCB Mount

SMD DIP-8

MOSFET

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

LAA710STR
IXYS Integrated Circuits
1: $19.72
12In Stock
3,000On Order

Mfr. Part No.
LAA710STR

Mouser Part No
849-LAA710STR

IXYS Integrated Circuits

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

Learn More

Datasheet

12In Stock

3,000On Order

Cut Tape

$19.72

$17.53

$16.65

$15.77

View

Reel

$13.42

MouseReel Available

Min.: 1
Mult.: 1

: 1,000

PCB Mount

SMD DIP-8

MOSFET

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

LCA110
IXYS Integrated Circuits
1: $4.41
6,900In Stock
10,950Expected 20/08/2026

Mfr. Part No.
LCA110

Mouser Part No
849-LCA110

IXYS Integrated Circuits

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

Learn More

Datasheet

6,900In Stock

10,950Expected 20/08/2026

$4.41

$4.13

$3.68

$2.53

Min.: 1
Mult.: 1

PCB Mount

DIP-6

MOSFET

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

LCA110LS
IXYS Integrated Circuits
1: $4.65
53In Stock

Mfr. Part No.
LCA110LS

Mouser Part No
849-LCA110LS

IXYS Integrated Circuits

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

Learn More

Datasheet

53In Stock

$4.65

$4.36

$3.87

$3.68

View

Min.: 1
Mult.: 1

PCB Mount

SMD DIP-6

MOSFET

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

LCA120L
IXYS Integrated Circuits
1: $6.57
90In Stock

Mfr. Part No.
LCA120L

Mouser Part No
849-LCA120L

IXYS Integrated Circuits

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

Learn More

Datasheet

90In Stock

$6.57

$6.16

$5.48

$5.20

View

Min.: 1
Mult.: 1

PCB Mount

DIP-6

MOSFET

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

LCA120LS
IXYS Integrated Circuits
1: $6.64
94In Stock

Mfr. Part No.
LCA120LS

Mouser Part No
849-LCA120LS

IXYS Integrated Circuits

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

Learn More

Datasheet

94In Stock

$6.64

$6.22

$5.53

$5.25

View

Min.: 1
Mult.: 1

PCB Mount

SMD DIP-6

MOSFET

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

LCA120S
IXYS Integrated Circuits
1: $6.64
67In Stock

Mfr. Part No.
LCA120S

Mouser Part No
849-LCA120S

IXYS Integrated Circuits

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

Learn More

Datasheet

67In Stock

$6.64

$6.22

$5.53

$5.25

View

Min.: 1
Mult.: 1

PCB Mount

SMD DIP-6

MOSFET

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

LCA125
IXYS Integrated Circuits
1: $7.63
160In Stock

Mfr. Part No.
LCA125

Mouser Part No
849-LCA125

IXYS Integrated Circuits

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

Learn More

Datasheet

160In Stock

$7.63

$7.15

$6.35

$6.04

View

Min.: 1
Mult.: 1

PCB Mount

DIP-6

MOSFET

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

LCA127LS
IXYS Integrated Circuits
1: $7.94
14In Stock

Mfr. Part No.
LCA127LS

Mouser Part No
849-LCA127LS

IXYS Integrated Circuits

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

Learn More

Datasheet

14In Stock

$7.94

$7.44

$6.61

$6.28

View

Min.: 1
Mult.: 1

PCB Mount

SMD DIP-6

MOSFET

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

LCA127S
IXYS Integrated Circuits
1: $7.75
93In Stock

Mfr. Part No.
LCA127S

Mouser Part No
849-LCA127S

IXYS Integrated Circuits

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

Learn More

Datasheet

93In Stock

$7.75

$7.27

$6.80

$5.77

View

Min.: 1
Mult.: 1

PCB Mount

SMD DIP-6

MOSFET

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

LCA129
IXYS Integrated Circuits
1: $5.77
120In Stock

Mfr. Part No.
LCA129

Mouser Part No
849-LCA129

IXYS Integrated Circuits

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

Learn More

Datasheet

120In Stock

$5.77

$5.40

$4.80

$4.56

View

Min.: 1
Mult.: 1

PCB Mount

DIP-6

MOSFET

Solid State Relays - PCB Mount 1-Form 30V 2000 mA Solid State Relay

LCA717
IXYS Integrated Circuits
1: $10.92
131In Stock
250Expected 03/07/2026

Mfr. Part No.
LCA717

Mouser Part No
849-LCA717

IXYS Integrated Circuits

Solid State Relays - PCB Mount 1-Form 30V 2000 mA Solid State Relay

Learn More

Datasheet

131In Stock

250Expected 03/07/2026

$10.92

$10.23

$9.09

$8.64

View

Min.: 1
Mult.: 1

PCB Mount

DIP-6

MOSFET

Solid State Relays - PCB Mount 1-Form 30V 2000 mA Solid State Relay

LCA717S
IXYS Integrated Circuits
1: $10.92
22In Stock
1,250Expected 29/06/2026

Mfr. Part No.
LCA717S

Mouser Part No
849-LCA717S

IXYS Integrated Circuits

Solid State Relays - PCB Mount 1-Form 30V 2000 mA Solid State Relay

Learn More

Datasheet

22In Stock

1,250Expected 29/06/2026

$10.92

$10.23

$9.09

$8.64

View

Min.: 1
Mult.: 1

PCB Mount

SMD DIP-6

MOSFET

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

OAA160S
IXYS Integrated Circuits
1: $12.73
71In Stock
100Expected 10/06/2026

Mfr. Part No.
OAA160S

Mouser Part No
849-OAA160S

IXYS Integrated Circuits

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

Learn More

Datasheet

71In Stock

100Expected 10/06/2026

$12.73

$11.32

$10.75

$10.19

View

Min.: 1
Mult.: 1

PCB Mount

SMD DIP-8

MOSFET

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

OMA160S
IXYS Integrated Circuits
1: $7.13
72In Stock

Mfr. Part No.
OMA160S

Mouser Part No
849-OMA160S

IXYS Integrated Circuits

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

Learn More

Datasheet

72In Stock

$7.13

$6.68

$5.94

$5.64

View

Min.: 1
Mult.: 1

PCB Mount

SMD DIP-6

MOSFET

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

PAA110
IXYS Integrated Circuits
1: $14.30
106In Stock

Mfr. Part No.
PAA110

Mouser Part No
849-PAA110

IXYS Integrated Circuits

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

Learn More

Datasheet

106In Stock

$14.30

$12.71

$12.08

$11.44

View

Min.: 1
Mult.: 1

PCB Mount

DIP-8

MOSFET

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

PAA110LS
IXYS Integrated Circuits
1: $14.59
2In Stock

Mfr. Part No.
PAA110LS

Mouser Part No
849-PAA110LS

IXYS Integrated Circuits

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

Learn More

Datasheet

2In Stock

$14.59

$12.97

$12.33

$11.68

View

Min.: 1
Mult.: 1

PCB Mount

SMD DIP-8

MOSFET

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

PAA132
IXYS Integrated Circuits
1: $16.86
199In Stock

Mfr. Part No.
PAA132

Mouser Part No
849-PAA132

IXYS Integrated Circuits

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

Learn More

Datasheet

199In Stock

$16.86

$14.99

$14.24

$13.49

View

Min.: 1
Mult.: 1

PCB Mount

DIP-8

MOSFET

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

PAA140L
IXYS Integrated Circuits
1: $15.93
1In Stock

Mfr. Part No.
PAA140L

Mouser Part No
849-PAA140L

IXYS Integrated Circuits

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

Learn More

Datasheet

1In Stock

$15.93

$14.16

$13.46

$12.75

View

Min.: 1
Mult.: 1

PCB Mount

DIP-8

MOSFET

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

PAA140S
IXYS Integrated Circuits
1: $15.76
131In Stock
300Expected 10/06/2026

Mfr. Part No.
PAA140S

Mouser Part No
849-PAA140S

IXYS Integrated Circuits

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

Learn More

Datasheet

131In Stock

300Expected 10/06/2026

$15.76

$14.01

$13.31

$12.61

View

Min.: 1
Mult.: 1

PCB Mount

SMD DIP-8

MOSFET

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

PAA150
IXYS Integrated Circuits
1: $14.54
129In Stock

Mfr. Part No.
PAA150

Mouser Part No
849-PAA150

IXYS Integrated Circuits

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

Learn More

Datasheet

129In Stock

$14.54

$12.92

$12.28

$11.63

View

Min.: 1
Mult.: 1

PCB Mount

DIP-8

MOSFET

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

PAA150STR
IXYS Integrated Circuits
1: $13.84
7In Stock
2,000Expected 26/11/2026

Mfr. Part No.
PAA150STR

Mouser Part No
849-PAA150STR

IXYS Integrated Circuits

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

Learn More

Datasheet

7In Stock

2,000Expected 26/11/2026

Cut Tape

$13.84

$12.31

$11.69

$11.07

View

Reel

$9.60

MouseReel Available

Min.: 1
Mult.: 1

: 1,000

PCB Mount

SMD DIP-8

MOSFET

Solid State Relays - PCB Mount DPST-NO/NO 6PIN DIP

PAA193
IXYS Integrated Circuits
1: $12.03
91In Stock

Mfr. Part No.
PAA193

Mouser Part No
849-PAA193

IXYS Integrated Circuits

Solid State Relays - PCB Mount DPST-NO/NO 6PIN DIP

Learn More

Datasheet

91In Stock

$12.03

$11.28

$10.03

$9.52

View

Min.: 1
Mult.: 1

PCB Mount

DIP-8

MOSFET

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

PLA110L
IXYS Integrated Circuits
1: $7.73
71In Stock

Mfr. Part No.
PLA110L

Mouser Part No
849-PLA110L

IXYS Integrated Circuits

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

Learn More

Datasheet

71In Stock

$7.73

$6.89

$6.58

$6.35

View

Min.: 1
Mult.: 1

PCB Mount

SMD DIP-6

MOSFET

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

PLA110S
IXYS Integrated Circuits
1: $8.12
62In Stock

Mfr. Part No.
PLA110S

Mouser Part No
849-PLA110S

IXYS Integrated Circuits

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

Learn More

Datasheet

62In Stock

$8.12

$7.61

$6.77

$6.43

View

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