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.

Results: 287
Select Image Part #
 Mfr.
Description Datasheet Availability Pricing (SGD) Filter the results in the table by unit price based on your quantity.
Qty. RoHS ECAD Model Packaging
Mounting Style
Load Current Rating
Load Voltage Rating
Relay Contact Form
Control Voltage Range
Package/Case
Output Type
Input Current
Minimum Operating Temperature
Maximum Operating Temperature
Length
Width
Height
Series
IXYS Integrated Circuits Solid State Relays - PCB Mount 400V Single Pole 400V Power Relay
Datasheet
6In Stock
400Expected 7/6/2027
Min.: 1
Mult.: 1

Tube PCB Mount 1.35 A 400 VDC 1 Form A (SPST-NO) 900 mVDC to 1.4 VDC MOSFET 100 mA - 40 C + 85 C 19.914 mm (0.784 in) 5.029 mm (0.198 in) 20.879 mm (0.822 in) CPC1967
IXYS Integrated Circuits Solid State Relays - PCB Mount SP-NO SS OptoMOS Power Relay
Datasheet
50In Stock
100Expected 2/9/2026
Min.: 1
Mult.: 1

Tube PCB Mount 500 mA 600 VDC 1 Form A (SPST-NO) 900 mVDC to 1.5 VDC MOSFET 50 mA - 40 C + 85 C 21.082 mm (0.83 in) 3.302 mm (0.13 in) 10.16 mm (0.4 in) CPC1983
IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A; 600V,0.5A 2500Vrms Isolation
Datasheet
22In Stock
5,250On Order
Min.: 1
Mult.: 1

Tube PCB Mount 500 mA 600 VDC 1 Form A (SPST-NO) 900 mVDC to 1.4 VDC SIP-4 MOSFET 50 mA - 40 C + 85 C 21.082 mm (0.83 in) 3.302 mm (0.13 in) 10.16 mm (0.4 in) CPC1983
IXYS Integrated Circuits Solid State Relays - PCB Mount RELAY, SS ICS
Datasheet
22In Stock
19,550On Order
Min.: 1
Mult.: 1

Tube PCB Mount 500 mA 600 VDC 1 Form A (SPST-NO) 900 mVDC to 1.5 VDC SIP-4 MOSFET 50 mA - 40 C + 85 C 21.082 mm (0.83 in) 3.302 mm (0.13 in) 10.16 mm (0.4 in) CPC1983
IXYS Integrated Circuits Solid State Relays - PCB Mount 350V 120mA Dual Single-Pole
Datasheet
96In Stock
Min.: 1
Mult.: 1

Tube PCB Mount 120 mA 350 VDC 2 Form A (DPST-NO) 900 mVDC to 1.4 VDC DIP-8 MOSFET 50 mA - 40 C + 85 C 9.652 mm (0.38 in) 6.35 mm (0.25 in) 3.302 mm (0.13 in) LAA110
IXYS Integrated Circuits Solid State Relays - PCB Mount 350V 120mA Dual Single-Pole
Datasheet
6In Stock
Min.: 1
Mult.: 1

Tube PCB Mount 120 mA 350 VDC 2 Form A (DPST-NO) 900 mVDC to 1.4 VDC SMD DIP-8 MOSFET 50 mA - 40 C + 85 C 9.652 mm (0.38 in) 6.35 mm (0.25 in) 3.302 mm (0.13 in) LAA110
IXYS Integrated Circuits Solid State Relays - PCB Mount 250V 170mA Dual Single-Pole
Datasheet
156In Stock
Min.: 1
Mult.: 1

Tube PCB Mount 170 mA 250 VDC 2 Form A (DPST-NO) 900 mVDC to 1.4 VDC DIP-8 MOSFET 50 mA - 40 C + 85 C 9.652 mm (0.38 in) 6.35 mm (0.25 in) 3.302 mm (0.13 in) LAA120
IXYS Integrated Circuits Solid State Relays - PCB Mount 250V 170mA Dual Single-Pole
Datasheet
3In Stock
Min.: 1
Mult.: 1

Tube PCB Mount 170 mA 250 VDC 2 Form A (DPST-NO) 900 mVDC to 1.4 VDC SMD DIP-8 MOSFET 50 mA - 40 C + 85 C 9.652 mm (0.38 in) 6.35 mm (0.25 in) 3.302 mm (0.13 in) LAA120
IXYS Integrated Circuits Solid State Relays - PCB Mount DUAL POLE
Datasheet
150In Stock
Min.: 1
Mult.: 1

Tube PCB Mount 170 mA 350 VDC 2 Form A (DPST-NO) 900 mVDC to 1.4 VDC DIP-8 MOSFET 50 mA - 40 C + 85 C 9.652 mm (0.38 in) 6.35 mm (0.25 in) 3.302 mm (0.13 in) LAA125
IXYS Integrated Circuits Solid State Relays - PCB Mount 350V 170mA Dual Single-Pole
Datasheet
83In Stock
Min.: 1
Mult.: 1

Tube PCB Mount 170 mA 350 VDC 2 Form A (DPST-NO) 900 mVDC to 1.4 VDC SMD DIP-8 MOSFET 50 mA - 40 C + 85 C 9.652 mm (0.38 in) 6.35 mm (0.25 in) 3.302 mm (0.13 in) LAA125
IXYS Integrated Circuits Solid State Relays - PCB Mount 250V 200mA Dual Single-Pole
Datasheet
90In Stock
Min.: 1
Mult.: 1

Tube PCB Mount 200 mA 250 VDC 2 Form A (DPST-NO) 900 mVDC to 1.4 VDC SMD DIP-8 MOSFET 50 mA - 40 C + 85 C 9.652 mm (0.38 in) 6.35 mm (0.25 in) 3.302 mm (0.13 in) LAA127
IXYS Integrated Circuits Solid State Relays - PCB Mount Single-Pole Relay 350V 120mA
Datasheet
30In Stock
Min.: 1
Mult.: 1

Tube PCB Mount 120 mA 350 VDC 1 Form A (SPST-NO) 900 mVDC to 1.4 VDC SMD DIP-6 MOSFET 50 mA - 40 C + 85 C 8.382 mm (0.33 in) 6.35 mm (0.25 in) 3.302 mm (0.13 in) LCA110
IXYS Integrated Circuits Solid State Relays - PCB Mount Single-Pole Relay 250V 170mA
Datasheet
90In Stock
Min.: 1
Mult.: 1

Tube PCB Mount 170 mA 250 VDC 1 Form A (SPST-NO) 900 mVDC to 1.4 VDC DIP-6 MOSFET 50 mA - 40 C + 85 C 8.382 mm (0.33 in) 6.35 mm (0.25 in) 3.302 mm (0.13 in) LCA120
IXYS Integrated Circuits Solid State Relays - PCB Mount Single-Pole Relay 250V 170mA
Datasheet
84In Stock
Min.: 1
Mult.: 1

Tube PCB Mount 170 mA 250 VDC 1 Form A (SPST-NO) 900 mVDC to 1.4 VDC SMD DIP-6 MOSFET 50 mA - 40 C + 85 C 8.382 mm (0.33 in) 6.35 mm (0.25 in) 3.302 mm (0.13 in) LCA120
IXYS Integrated Circuits Solid State Relays - PCB Mount SPST-NO 6PIN SMT
Datasheet
67In Stock
Min.: 1
Mult.: 1

Tube PCB Mount 170 mA 250 VDC 1 Form A (SPST-NO) 900 mVDC to 1.4 VDC SMD DIP-6 MOSFET 50 mA - 40 C + 85 C 8.382 mm (0.33 in) 6.35 mm (0.25 in) 3.302 mm (0.13 in) LCA120
IXYS Integrated Circuits Solid State Relays - PCB Mount Single-Pole Relay 250V 200mA
Datasheet
14In Stock
Min.: 1
Mult.: 1

Tube PCB Mount 200 mA 250 VDC 1 Form A (SPST-NO) 900 mVDC to 1.4 VDC SMD DIP-6 MOSFET 50 mA 8.382 mm (0.33 in) 6.35 mm (0.25 in) 3.302 mm (0.13 in) LCA127
IXYS Integrated Circuits Solid State Relays - PCB Mount Single-Pole Relay 250V 200mA
Datasheet
93In Stock
Min.: 1
Mult.: 1

Tube PCB Mount 200 mA 250 VDC 1 Form A (SPST-NO) 900 mVDC to 1.4 VDC SMD DIP-6 MOSFET 50 mA - 40 C + 85 C 8.382 mm (0.33 in) 6.35 mm (0.25 in) 3.302 mm (0.13 in) LCA127
IXYS Integrated Circuits Solid State Relays - PCB Mount SPST-NO 6PIN DIP
Datasheet
150In Stock
Min.: 1
Mult.: 1

Tube PCB Mount 120 mA 350 VDC 1 Form A (SPST-NO) 900 mVDC to 1.4 VDC DIP-6 MOSFET 50 mA - 40 C + 85 C 8.382 mm (0.33 in) 6.35 mm (0.25 in) 3.302 mm (0.13 in) LCA182
IXYS Integrated Circuits Solid State Relays - PCB Mount Single Pole OptoMOS 1-Form-A, 60V, 1A
Datasheet
146In Stock
350Expected 20/1/2027
Min.: 1
Mult.: 1

Tube PCB Mount 1 A 60 VDC 1 Form A (SPST-NO) 900 mVDC to 1.4 VDC MOSFET 50 mA - 40 C + 85 C 8.382 mm (0.33 in) 6.35 mm (0.25 in) 3.302 mm (0.13 in) LCA710
IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A 60V 1000 mA SSR w/optic MOSFET
Datasheet
178In Stock
250Expected 14/8/2026
Min.: 1
Mult.: 1

Tube PCB Mount 1 A 60 VDC 1 Form A (SPST-NO) 900 mVDC to 1.4 VDC MOSFET 50 mA - 40 C + 85 C 8.382 mm (0.33 in) 6.35 mm (0.25 in) 3.302 mm (0.13 in) LCA712
IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form 30V 2000 mA Solid State Relay
Datasheet
201In Stock
300Expected 25/1/2027
Min.: 1
Mult.: 1

Tube PCB Mount 2 A 30 VDC 1 Form A (SPST-NO) 900 mVDC to 1.4 VDC DIP-6 MOSFET 50 mA - 40 C + 85 C 8.382 mm (0.33 in) 6.35 mm (0.25 in) 3.302 mm (0.13 in) LCA717
IXYS Integrated Circuits Solid State Relays - PCB Mount DPST-NO/NO 8PIN DIP
Datasheet
95In Stock
Min.: 1
Mult.: 1

Tube PCB Mount 50 mA 250 VDC 2 Form A (DPST-NO) 900 mVDC to 1.4 VDC DIP-8 MOSFET 50 mA - 40 C + 85 C 9.652 mm (0.38 in) 6.35 mm (0.25 in) 3.302 mm (0.13 in) OAA160
IXYS Integrated Circuits Solid State Relays - PCB Mount Dual 1-Form-A 250V 50mA SSR
Datasheet
171In Stock
Min.: 1
Mult.: 1

Tube PCB Mount 50 mA 250 VDC 2 Form A (DPST-NO) 900 mVDC to 1.4 VDC SMD DIP-8 MOSFET 50 mA - 40 C + 85 C 9.652 mm (0.38 in) 6.35 mm (0.25 in) 3.302 mm (0.13 in) OAA160
IXYS Integrated Circuits Solid State Relays - PCB Mount Single 1-Form-A 250V 50mA relay
Datasheet
72In Stock
Min.: 1
Mult.: 1

Tube PCB Mount 50 mA 250 VDC 1 Form A (SPST-NO) 900 mVDC to 1.4 VDC SMD DIP-6 MOSFET 50 mA 8.382 mm (0.33 in) 6.35 mm (0.25 in) 3.302 mm (0.13 in) OMA160
IXYS Integrated Circuits Solid State Relays - PCB Mount DPST-NO/NO 8PIN DIP
Datasheet
100In Stock
Min.: 1
Mult.: 1

Tube PCB Mount 150 mA 400 VDC 2 Form A (DPST-NO) 900 mVDC to 1.4 VDC DIP-8 MOSFET 50 mA - 40 C + 85 C 9.652 mm (0.38 in) 6.35 mm (0.25 in) 3.302 mm (0.13 in) PAA110