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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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Part #

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

LAA127STR
IXYS Integrated Circuits
1: $9.25
1,149In Stock

Mfr. Part #
LAA127STR

Mouser Part #
849-LAA127STR

IXYS Integrated Circuits

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

Learn More

Datasheet

1,149In Stock

Cut Tape

$9.25

$8.26

$7.89

$7.61

Reel

$6.45

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 1,000

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

LAA710STR
IXYS Integrated Circuits
1: $14.80
1,855In Stock

Mfr. Part #
LAA710STR

Mouser Part #
849-LAA710STR

IXYS Integrated Circuits

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

Learn More

Datasheet

1,855In Stock

Cut Tape

$14.80

$13.19

$12.17

$11.75

View

Reel

$10.14

MouseReel Available

Min.: 1
Mult.: 1

Reel: 1,000

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

LCA110L
IXYS Integrated Circuits
1: $2.64
1,834In Stock

Mfr. Part #
LCA110L

Mouser Part #
849-LCA110L

IXYS Integrated Circuits

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

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Datasheet

1,834In Stock

$2.64

$2.25

$2.09

$1.92

$1.86

Min.: 1
Mult.: 1

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

LCA110S
IXYS Integrated Circuits
1: $2.85
5,519In Stock

Mfr. Part #
LCA110S

Mouser Part #
849-LCA110S

IXYS Integrated Circuits

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

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Datasheet

5,519In Stock

$2.85

$2.48

$2.34

$2.25

$1.86

Min.: 1
Mult.: 1

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

LCA120STR
IXYS Integrated Circuits
1: $4.84
3,352In Stock

Mfr. Part #
LCA120STR

Mouser Part #
849-LCA120STR

IXYS Integrated Circuits

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

Learn More

Datasheet

3,352In Stock

Cut Tape

$4.84

$3.98

$3.83

$3.66

Reel

$2.90

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 1,000

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

LCA127
IXYS Integrated Circuits
1: $5.92
3,073In Stock

Mfr. Part #
LCA127

Mouser Part #
849-LCA127

IXYS Integrated Circuits

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

Learn More

Datasheet

3,073In Stock

$5.92

$5.55

$4.98

$4.81

View

Min.: 1
Mult.: 1

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

LCA127STR
IXYS Integrated Circuits
1: $5.55
1,039In Stock

Mfr. Part #
LCA127STR

Mouser Part #
849-LCA127STR

IXYS Integrated Circuits

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

Learn More

Datasheet

1,039In Stock

Cut Tape

$5.55

$4.94

$4.73

$4.56

Reel

$3.91

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 1,000

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

LCA182STR
IXYS Integrated Circuits
1: $3.98
4,172In Stock

Mfr. Part #
LCA182STR

Mouser Part #
849-LCA182STR

IXYS Integrated Circuits

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

Learn More

Datasheet

4,172In Stock

Cut Tape

$3.98

$3.57

$3.39

$3.29

Reel

$2.67

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 1,000

Solid State Relays - PCB Mount 1-Form-A SSR

LCA701
IXYS Integrated Circuits
1: $8.97
775In Stock

Mfr. Part #
LCA701

Mouser Part #
849-LCA701

IXYS Integrated Circuits

Solid State Relays - PCB Mount 1-Form-A SSR

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Datasheet

775In Stock

$8.97

$8.00

$7.64

$7.36

View

Min.: 1
Mult.: 1

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

LCA701STR
IXYS Integrated Circuits
1: $7.89
1,389In Stock
3,000Expected 2026-07-29

Mfr. Part #
LCA701STR

Mouser Part #
849-LCA701STR

IXYS Integrated Circuits

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

Learn More

Datasheet

1,389In Stock

3,000Expected 2026-07-29

Cut Tape

$7.89

$6.49

$6.26

$5.97

Reel

$5.56

View

Min.: 1
Mult.: 1

Reel: 1,000

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

LCA710
IXYS Integrated Circuits
1: $7.63
3,246In Stock

Mfr. Part #
LCA710

Mouser Part #
849-LCA710

IXYS Integrated Circuits

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

Learn More

Datasheet

3,246In Stock

$7.63

$6.48

$6.28

$5.49

View

Min.: 1
Mult.: 1

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

LCA710S
IXYS Integrated Circuits
1: $7.75
3,080In Stock

Mfr. Part #
LCA710S

Mouser Part #
849-LCA710S

IXYS Integrated Circuits

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

Learn More

Datasheet

3,080In Stock

$7.75

$6.91

$6.60

$5.64

View

Min.: 1
Mult.: 1

Solid State Relays - PCB Mount 1-Form-A 60V 2200mA SSR w/optic MOSFET

LCA715S
IXYS Integrated Circuits
1: $9.07
2,146In Stock
275Expected 2026-02-12

Mfr. Part #
LCA715S

Mouser Part #
849-LCA715S

IXYS Integrated Circuits

Solid State Relays - PCB Mount 1-Form-A 60V 2200mA SSR w/optic MOSFET

Learn More

Datasheet

2,146In Stock

275Expected 2026-02-12

$9.07

$8.08

$7.72

$7.44

View

Min.: 1
Mult.: 1

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

LCA717STR
IXYS Integrated Circuits
1: $7.64
924In Stock

Mfr. Part #
LCA717STR

Mouser Part #
849-LCA717STR

IXYS Integrated Circuits

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

Learn More

Datasheet

924In Stock

Cut Tape

$7.64

$6.82

$6.51

$6.28

View

Reel

$4.90

MouseReel Available

Min.: 1
Mult.: 1

Reel: 1,000

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

PAA110STR
IXYS Integrated Circuits
1: $9.90
609In Stock
1,000Expected 2026-08-18

Mfr. Part #
PAA110STR

Mouser Part #
849-PAA110STR

IXYS Integrated Circuits

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

Learn More

Datasheet

609In Stock

1,000Expected 2026-08-18

Cut Tape

$9.90

$9.21

$8.85

$8.63

Reel

$7.38

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 1,000

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

PAA132STR
IXYS Integrated Circuits
1: $13.28
1,233In Stock

Mfr. Part #
PAA132STR

Mouser Part #
849-PAA132STR

IXYS Integrated Circuits

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

Learn More

Datasheet

1,233In Stock

Cut Tape

$13.28

$12.46

$11.08

$10.52

Reel

$7.55

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 1,000

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

PAA140
IXYS Integrated Circuits
1: $11.95
2,164In Stock

Mfr. Part #
PAA140

Mouser Part #
849-PAA140

IXYS Integrated Circuits

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

Learn More

Datasheet

2,164In Stock

$11.95

$10.65

$10.18

$9.81

View

Min.: 1
Mult.: 1

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

PAA140S
IXYS Integrated Circuits
1: $10.77
841In Stock

Mfr. Part #
PAA140S

Mouser Part #
849-PAA140S

IXYS Integrated Circuits

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

Learn More

Datasheet

841In Stock

$10.77

$9.77

$9.72

$9.70

View

Min.: 1
Mult.: 1

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

PAA140STR
IXYS Integrated Circuits
1: $11.45
1,758In Stock

Mfr. Part #
PAA140STR

Mouser Part #
849-PAA140STR

IXYS Integrated Circuits

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

Learn More

Datasheet

1,758In Stock

Cut Tape

$11.45

$10.21

$9.75

$9.42

View

Reel

$7.52

MouseReel Available

Min.: 1
Mult.: 1

Reel: 1,000

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

PAA150STR
IXYS Integrated Circuits
1: $10.62
1,100In Stock

Mfr. Part #
PAA150STR

Mouser Part #
849-PAA150STR

IXYS Integrated Circuits

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

Learn More

Datasheet

1,100In Stock

Cut Tape

$10.62

$9.47

$9.05

$8.74

Reel

$7.50

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 1,000

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

PLA110
IXYS Integrated Circuits
1: $5.98
4,263In Stock

Mfr. Part #
PLA110

Mouser Part #
849-PLA110

IXYS Integrated Circuits

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

Learn More

Datasheet

4,263In Stock

$5.98

$4.91

$4.74

$4.50

View

Min.: 1
Mult.: 1

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

PLA140LSTR
IXYS Integrated Circuits
1: $7.27
1,000In Stock

Mfr. Part #
PLA140LSTR

Mouser Part #
849-PLA140LSTR

IXYS Integrated Circuits

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

Learn More

Datasheet

1,000In Stock

Cut Tape

$7.27

$6.49

$6.20

$5.98

Reel

$5.25

View

Min.: 1
Mult.: 1

Reel: 1,000

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

PLA140STR
IXYS Integrated Circuits
1: $7.11
1,223In Stock
3,000On Order

Mfr. Part #
PLA140STR

Mouser Part #
849-PLA140STR

IXYS Integrated Circuits

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

Learn More

Datasheet

1,223In Stock

3,000On Order

Cut Tape

$7.11

$6.34

$6.06

$5.84

Reel

$5.02

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 1,000

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

PLA150STR
IXYS Integrated Circuits
1: $7.01
2,000In Stock

Mfr. Part #
PLA150STR

Mouser Part #
849-PLA150STR

IXYS Integrated Circuits

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

Learn More

Datasheet

2,000In Stock

Cut Tape

$7.01

$6.56

$5.83

$5.53

View

Reel

$4.74

MouseReel Available

Min.: 1
Mult.: 1

Reel: 1,000

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

PLA160STR
IXYS Integrated Circuits
1: $6.62
2,209In Stock

Mfr. Part #
PLA160STR

Mouser Part #
849-PLA160STR

IXYS Integrated Circuits

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

Learn More

Datasheet

2,209In Stock

Cut Tape

$6.62

$5.44

$5.25

$5.02

Reel

$4.67

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 1,000

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

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

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