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
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Description Datasheet Availability Pricing (SGD) Filter the results in the table by unit price based on your quantity.
Qty. RoHS ECAD Model Packaging
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Load Voltage Rating
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Maximum Operating Temperature
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IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A 60V 2200mA SSR w/optic MOSFET
Datasheet
4,208In Stock
Min.: 1
Mult.: 1

Tube PCB Mount 2.2 A 60 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) LCA715
IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A 60V 2200mA SSR w/optic MOSFET
Datasheet
11,819In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

Reel, Cut Tape, MouseReel PCB Mount 2.2 A 60 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) LCA715
IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form 30V 2000 mA Solid State Relay
Datasheet
2,347In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

Reel, Cut Tape, MouseReel PCB Mount 2 A 30 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) LCA717
IXYS Integrated Circuits Solid State Relays - PCB Mount SPST-NO 6PIN DIP
Datasheet
3,000In Stock
3,700Expected 13/11/2026
Min.: 1
Mult.: 1

Tube PCB Mount 250 mA 400 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) PLA140
IXYS Integrated Circuits Solid State Relays - PCB Mount Single-Pole Relay 800V 100mA
Datasheet
11,937In Stock
32,000On Order
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

Reel, Cut Tape, MouseReel PCB Mount 180 mA 800 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) PLA170
IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A 60V 700mA Solid State Relay
Datasheet
1,011In Stock
150,000On Order
MouseReel Available
Min.: 1
Mult.: 1
: 2,000

Reel, Cut Tape, MouseReel PCB Mount 700 mA 60 VDC 1 Form A (SPST-NO) 900 mVDC to 1.4 VDC SOP-4 MOSFET 50 mA - 40 C + 85 C 4.089 mm (0.161 in) 3.81 mm (0.15 in) 2.184 mm (0.086 in) CPC1002
IXYS Integrated Circuits Solid State Relays - PCB Mount Dual 1-Form-A 100V 150mA SSR
Datasheet
2,360In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,000

Reel, Cut Tape, MouseReel PCB Mount 150 mA 100 VDC 1 Form A (SPST-NO) 900 mVDC to 1.4 VDC SOP-4 MOSFET 50 mA - 40 C + 85 C 4.089 mm (0.161 in) 3.81 mm (0.15 in) 2.184 mm (0.086 in) CPC1009
IXYS Integrated Circuits Solid State Relays - PCB Mount 250V, 1-Form-A SSR
Datasheet
5,060In Stock
Min.: 1
Mult.: 1

Tube PCB Mount 170 mA 250 VDC 1 Form A (SPST-NO) 900 mVDC to 1.4 VDC SOP-4 MOSFET 50 mA - 40 C + 85 C 4.089 mm (0.161 in) 3.81 mm (0.15 in) 2.03 mm (0.08 in) CPC10
IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A 100V 100mA Solid State Relay
Datasheet
3,956In Stock
Min.: 1
Mult.: 1

Tube PCB Mount 100 mA 100 VDC 1 Form A (SPST-NO) 900 mVDC to 1.4 VDC SOP-4 MOSFET 50 mA - 40 C + 85 C 4.089 mm (0.161 in) 3.81 mm (0.15 in) 2.184 mm (0.086 in) CPC1016
IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A 350V 120mA Solid State Relay
Datasheet
3,642In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,000

Reel, Cut Tape, MouseReel PCB Mount 120 mA 350 VDC 1 Form A (SPST-NO) 900 mVDC to 1.5 VDC SOP-4 MOSFET 50 mA - 40 C + 85 C 4.089 mm (0.161 in) 3.81 mm (0.15 in) 2.03 mm (0.08 in) CPC1030
IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A 400V 120mA Solid State Relay
Datasheet
3,241In Stock
2,000Expected 11/9/2026
MouseReel Available
Min.: 1
Mult.: 1
: 2,000

Reel, Cut Tape, MouseReel PCB Mount 120 mA 400 VDC 1 Form A (SPST-NO) 900 mVDC to 1.4 VDC SOP-4 MOSFET 50 mA - 40 C + 85 C 4.089 mm (0.161 in) 3.81 mm (0.15 in) 2.184 mm (0.086 in) CPC1225
IXYS Integrated Circuits Solid State Relays - PCB Mount SPST-NO 4PIN SOP
Datasheet
1,253In Stock
700Expected 10/8/2026
Min.: 1
Mult.: 1

Tube PCB Mount 120 mA 350 VDC 1 Form A (SPST-NO) 900 mVDC to 1.4 VDC SOP-4 MOSFET 50 mA - 40 C + 85 C 4.089 mm (0.161 in) 3.81 mm (0.15 in) 2.184 mm (0.086 in) CPC1230
IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A 350V 120mA Solid State Relay
Datasheet
3,245In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,000

Reel, Cut Tape, MouseReel PCB Mount 120 mA 350 VDC 1 Form A (SPST-NO) 900 mVDC to 1.4 VDC SOP-4 MOSFET 50 mA - 40 C + 85 C 4.089 mm (0.161 in) 3.81 mm (0.15 in) 2.184 mm (0.086 in) CPC1230
IXYS Integrated Circuits Solid State Relays - PCB Mount 350V 120mA Single OptoMOS Relay
Datasheet
1,570In Stock
500Expected 30/10/2026
Min.: 1
Mult.: 1

Tube PCB Mount 120 mA 350 VDC 1 Form A (SPST-NO) 900 mVDC to 1.4 VDC SMD DIP-4 MOSFET 50 mA - 40 C + 85 C 6.35 mm (0.25 in) 4.572 mm (0.18 in) 3.3 mm (0.13 in) CPC1330
IXYS Integrated Circuits Solid State Relays - PCB Mount Single Pole Relay 400V 140mA
Datasheet
1,023In Stock
Min.: 1
Mult.: 1

Tube PCB Mount 140 mA 400 VDC 1 Form A (SPST-NO) 900 mVDC to 1.4 VDC DIP-4 MOSFET 50 mA - 40 C + 85 C 6.35 mm (0.25 in) 4.572 mm (0.18 in) 3.3 mm (0.13 in) CPC1390
IXYS Integrated Circuits Solid State Relays - PCB Mount 600V 90mA Single OptoMOS Relay
Datasheet
1,505In Stock
Min.: 1
Mult.: 1

Tube PCB Mount 90 mA 600 VDC 1 Form A (SPST-NO) 900 mVDC to 1.4 VDC DIP-4 MOSFET 50 mA - 40 C + 85 C 6.35 mm (0.25 in) 4.572 mm (0.18 in) 3.3 mm (0.13 in) CPC1393
IXYS Integrated Circuits Solid State Relays - PCB Mount 600V 90mA Single OptoMOS Relay
Datasheet
1,480In Stock
8,000On Order
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

Reel, Cut Tape, MouseReel PCB Mount 90 mA 600 VDC 1 Form A (SPST-NO) 900 mVDC to 1.4 VDC DIP-4 MOSFET 50 mA - 40 C + 85 C 6.35 mm (0.25 in) 4.572 mm (0.18 in) 3.3 mm (0.13 in) CPC1393
IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A; 600V,120mA 5000Vrms Isolation
Datasheet
522In Stock
Min.: 1
Mult.: 1

Tube PCB Mount 120 mA 600 VDC 1 Form A (SPST-NO) 900 mVDC to 1.4 VDC DIP-4 MOSFET 50 mA - 40 C + 85 C 6.35 mm (0.25 in) 4.572 mm (0.18 in) 3.3 mm (0.13 in) CPC1394
IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A; 600V,120mA 5000Vrms Isolation
Datasheet
1,227In Stock
4,000On Order
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

Reel, Cut Tape, MouseReel PCB Mount 120 mA 600 VDC 1 Form A (SPST-NO) 900 mVDC to 1.4 VDC MOSFET 50 mA - 40 C + 85 C 6.35 mm (0.25 in) 4.572 mm (0.18 in) 3.3 mm (0.13 in) CPC1394
IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A 250V 200mA Solid State Relay
Datasheet
1,751In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

Reel, Cut Tape, MouseReel PCB Mount 200 mA 250 VDC 1 Form A (SPST-NO) 1.15 VDC to 1.5 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) CPC1510
IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A 600V 6-Pin DIP
Datasheet
1,227In Stock
Min.: 1
Mult.: 1

Tube PCB Mount 120 mA 600 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) CPC1593
IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A 600V 6-Pin SM
Datasheet
984In Stock
Min.: 1
Mult.: 1

Tube PCB Mount 120 mA 600 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) CPC1593
IXYS Integrated Circuits Solid State Relays - PCB Mount 250V Single Pole DC Power Relay
Datasheet
572In Stock
Min.: 1
Mult.: 1

Tube PCB Mount 1 A 250 VDC 1 Form A (SPST-NO) 900 mVDC to 1.4 VDC i4-PAC 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) CPC1726
IXYS Integrated Circuits Solid State Relays - PCB Mount DC Only Single Pole i4-PAC
Datasheet
370In Stock
Min.: 1
Mult.: 1

Tube PCB Mount 3.4 A 250 VDC 1 Form A (SPST-NO) 900 mVDC to 1.4 VDC i4-PAC MOSFET 100 mA - 40 C + 85 C 19.914 mm (0.784 in) 5.029 mm (0.198 in) 26.162 mm (1.03 in) CPC1727
IXYS Integrated Circuits Solid State Relays - PCB Mount DC Only Single Pole i4-PAC
Datasheet
197In Stock
Min.: 1
Mult.: 1

Tube PCB Mount 1 A 1 kVDC 1 Form A (SPST-NO) 900 mVDC to 1.4 VDC i4-PAC MOSFET 100 mA - 40 C + 85 C 19.914 mm (0.784 in) 5.029 mm (0.198 in) 26.162 mm (1.03 in) CPC1788