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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 SP, Normally-Open OptoMOS Relay

CPC1540GS
IXYS Integrated Circuits
1: £4.64
29In Stock
2,950Expected 09/11/2026

Mfr. Part No.
CPC1540GS

Mouser Part No
849-CPC1540GS

IXYS Integrated Circuits

Solid State Relays - PCB Mount SP, Normally-Open OptoMOS Relay

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Datasheet

29In Stock

2,950Expected 09/11/2026

£4.64

£4.54

Min.: 1
Mult.: 1

Solid State Relays - PCB Mount SP, Normally-Open OptoMOS Relay

CPC1540GSTR
IXYS Integrated Circuits
1: £4.43
9In Stock

Mfr. Part No.
CPC1540GSTR

Mouser Part No
849-CPC1540GSTR

IXYS Integrated Circuits

Solid State Relays - PCB Mount SP, Normally-Open OptoMOS Relay

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Datasheet

9In Stock

Cut Tape

£4.43

£3.75

£3.58

£3.46

Reel

£2.83

View

Min.: 1
Mult.: 1

: 1,000

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

CPC1560GSTR
IXYS Integrated Circuits
1: £5.74
31In Stock

Mfr. Part No.
CPC1560GSTR

Mouser Part No
849-CPC1560GSTR

IXYS Integrated Circuits

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

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Datasheet

31In Stock

Cut Tape

£5.74

£5.25

£4.83

£4.63

View

Reel

£3.91

MouseReel Available

Min.: 1
Mult.: 1

: 1,000

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

CPC1786J
IXYS Integrated Circuits
1: £20.67
43In Stock
75Expected 23/06/2027

Mfr. Part No.
CPC1786J

Mouser Part No
849-CPC1786J

IXYS Integrated Circuits

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

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Datasheet

43In Stock

75Expected 23/06/2027

£20.67

£18.78

£17.85

£16.98

Min.: 1
Mult.: 1

Triac & SCR Output Optocouplers 400V, 1mA AC Solid State Relay

CPC1945G
IXYS Integrated Circuits
1: £7.11
105In Stock

Mfr. Part No.
CPC1945G

Mouser Part No
849-CPC1945G

IXYS Integrated Circuits

Triac & SCR Output Optocouplers 400V, 1mA AC Solid State Relay

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Datasheet

105In Stock

£7.11

£5.30

£4.64

£3.95

View

Min.: 1
Mult.: 1

Solid State Relays - PCB Mount 400V Single Pole 400V Power Relay

CPC1967J
IXYS Integrated Circuits
1: £30.69
6In Stock
400Expected 07/06/2027

Mfr. Part No.
CPC1967J

Mouser Part No
849-CPC1967J

IXYS Integrated Circuits

Solid State Relays - PCB Mount 400V Single Pole 400V Power Relay

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Datasheet

6In Stock

400Expected 07/06/2027

£30.69

£27.19

£25.89

£24.71

Min.: 1
Mult.: 1

Triac & SCR Output Optocouplers 400V Single Pole SIP Power Relay

CPC1973Y
IXYS Integrated Circuits
1: £7.70
90In Stock

Mfr. Part No.
CPC1973Y

Mouser Part No
849-CPC1973Y

IXYS Integrated Circuits

Triac & SCR Output Optocouplers 400V Single Pole SIP Power Relay

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Datasheet

90In Stock

£7.70

£6.33

£5.51

£5.29

Min.: 1
Mult.: 1

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

CPC1978J
IXYS Integrated Circuits
1: £19.12
57In Stock
550On Order

Mfr. Part No.
CPC1978J

Mouser Part No
849-CPC1978J

IXYS Integrated Circuits

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

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Datasheet

57In Stock

550On Order

£19.12

£17.30

£16.46

£15.70

Min.: 1
Mult.: 1

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

CPC1983B
IXYS Integrated Circuits
1: £7.88
50In Stock
100Expected 02/09/2026

Mfr. Part No.
CPC1983B

Mouser Part No
849-CPC1983B

IXYS Integrated Circuits

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

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Datasheet

50In Stock

100Expected 02/09/2026

£7.88

£7.03

£6.70

£6.47

View

Min.: 1
Mult.: 1

Solid State Relays - PCB Mount 1-Form-A; 600V,0.5A 2500Vrms Isolation

CPC1983Y
IXYS Integrated Circuits
1: £8.06
22In Stock
5,250On Order

Mfr. Part No.
CPC1983Y

Mouser Part No
849-CPC1983Y

IXYS Integrated Circuits

Solid State Relays - PCB Mount 1-Form-A; 600V,0.5A 2500Vrms Isolation

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Datasheet

22In Stock

5,250On Order

£8.06

£7.90

£6.78

£6.49

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Min.: 1
Mult.: 1

Solid State Relays - PCB Mount RELAY, SS ICS

CPC1983YE
IXYS Integrated Circuits
1: £7.75
22In Stock
19,550On Order

Mfr. Part No.
CPC1983YE

Mouser Part No
849-CPC1983YE

IXYS Integrated Circuits

Solid State Relays - PCB Mount RELAY, SS ICS

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Datasheet

22In Stock

19,550On Order

£7.75

£6.91

£6.59

£6.36

View

Min.: 1
Mult.: 1

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

LAA110L
IXYS Integrated Circuits
1: £7.05
96In Stock

Mfr. Part No.
LAA110L

Mouser Part No
849-LAA110L

IXYS Integrated Circuits

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

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Datasheet

96In Stock

£7.05

£6.29

£6.01

£5.80

View

Min.: 1
Mult.: 1

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

LAA110LS
IXYS Integrated Circuits
1: £6.70
6In Stock

Mfr. Part No.
LAA110LS

Mouser Part No
849-LAA110LS

IXYS Integrated Circuits

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

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Datasheet

6In Stock

£6.70

£6.15

£6.01

£4.95

View

Min.: 1
Mult.: 1

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

LAA120
IXYS Integrated Circuits
1: £7.32
156In Stock

Mfr. Part No.
LAA120

Mouser Part No
849-LAA120

IXYS Integrated Circuits

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

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Datasheet

156In Stock

£7.32

£6.86

£6.09

£5.79

View

Min.: 1
Mult.: 1

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

LAA120S
IXYS Integrated Circuits
1: £6.73
3In Stock

Mfr. Part No.
LAA120S

Mouser Part No
849-LAA120S

IXYS Integrated Circuits

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

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Datasheet

3In Stock

£6.73

£6.01

£5.74

£5.53

View

Min.: 1
Mult.: 1

Solid State Relays - PCB Mount DUAL POLE

LAA125
IXYS Integrated Circuits
1: £6.73
150In Stock

Mfr. Part No.
LAA125

Mouser Part No
849-LAA125

IXYS Integrated Circuits

Solid State Relays - PCB Mount DUAL POLE

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Datasheet

150In Stock

£6.73

£6.01

£5.74

£5.53

View

Min.: 1
Mult.: 1

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

LAA125LS
IXYS Integrated Circuits
1: £7.97
83In Stock

Mfr. Part No.
LAA125LS

Mouser Part No
849-LAA125LS

IXYS Integrated Circuits

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

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Datasheet

83In Stock

£7.97

£7.47

£6.64

£6.30

View

Min.: 1
Mult.: 1

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

LAA127LS
IXYS Integrated Circuits
1: £9.44
90In Stock

Mfr. Part No.
LAA127LS

Mouser Part No
849-LAA127LS

IXYS Integrated Circuits

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

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Datasheet

90In Stock

£9.44

£8.39

£7.96

£7.62

View

Min.: 1
Mult.: 1

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

LCA110LS
IXYS Integrated Circuits
1: £3.37
30In Stock

Mfr. Part No.
LCA110LS

Mouser Part No
849-LCA110LS

IXYS Integrated Circuits

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

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Datasheet

30In Stock

£3.37

£3.00

£2.87

£2.76

View

Min.: 1
Mult.: 1

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

LCA120L
IXYS Integrated Circuits
1: £4.66
90In Stock

Mfr. Part No.
LCA120L

Mouser Part No
849-LCA120L

IXYS Integrated Circuits

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

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Datasheet

90In Stock

£4.66

£4.16

£3.97

£3.83

View

Min.: 1
Mult.: 1

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

LCA120LS
IXYS Integrated Circuits
1: £4.98
84In 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

84In Stock

£4.98

£4.68

£4.16

£3.95

View

Min.: 1
Mult.: 1

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

LCA120S
IXYS Integrated Circuits
1: £4.70
67In Stock

Mfr. Part No.
LCA120S

Mouser Part No
849-LCA120S

IXYS Integrated Circuits

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

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Datasheet

67In Stock

£4.70

£4.19

£4.00

£3.86

View

Min.: 1
Mult.: 1

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

LCA127LS
IXYS Integrated Circuits
1: £5.56
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

£5.56

£4.96

£4.74

£4.57

View

Min.: 1
Mult.: 1

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

LCA127S
IXYS Integrated Circuits
1: £5.45
93In Stock

Mfr. Part No.
LCA127S

Mouser Part No
849-LCA127S

IXYS Integrated Circuits

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

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Datasheet

93In Stock

£5.45

£4.85

£4.64

£4.47

View

Min.: 1
Mult.: 1

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

LCA182
IXYS Integrated Circuits
1: £4.01
150In Stock

Mfr. Part No.
LCA182

Mouser Part No
849-LCA182

IXYS Integrated Circuits

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

Learn More

Datasheet

150In Stock

£4.01

£3.76

£3.34

£3.21

View

Min.: 1
Mult.: 1

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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