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 (JPY) 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
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Input Current
Minimum Operating Temperature
Maximum Operating Temperature
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Series
IXYS Integrated Circuits Solid State Relays - PCB Mount SPST-NO 6PIN DIP
Datasheet
2,992In Stock
3,700Expected 10/26/2026
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
8,431In Stock
32,000Expected 1/25/2027
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 CPC1965G
IXYS Integrated Circuits Solid State Relays - PCB Mount 600V, 1A AC Solid State Relay
Datasheet
9,771In Stock
4,225Expected 8/21/2026
Min.: 1
Mult.: 1

Tube PCB Mount 1 A 20 VAC to 260 VAC 1 Form A (SPST-NO) 900 mVDC to 1.4 VDC SCR 100 mA - 40 C + 85 C 19.202 mm (0.756 in) 3.302 mm (0.13 in) 6.35 mm (0.25 in) CPC1965
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
3,840In 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 SPST-NO 4PIN SOP
Datasheet
1,053In Stock
700On Order
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 10/30/2026
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 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 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
1,215In Stock
5,000On 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
1,459In Stock
5,000Expected 1/22/2027
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
1,067In 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 DC Only Single Pole i4-PAC
Datasheet
552In Stock
Min.: 1
Mult.: 1

Tube PCB Mount 4 A 60 VDC 1 Form A (SPST-NO) 900 mVDC to 1.56 VDC i4-PAC MOSFET 50 mA - 40 C + 85 C 19.914 mm (0.784 in) 5.029 mm (0.198 in) 20.879 mm (0.822 in) CPC1708
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
368In 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
129In Stock
100Expected 9/30/2026
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
IXYS Integrated Circuits Solid State Relays - PCB Mount 100V Single Pole SIP Power Relay
Datasheet
292In Stock
1,400On Order
Min.: 1
Mult.: 1

Tube PCB Mount 2.5 A 100 VDC 1 Form A (SPST-NO) 900 mVDC to 1.4 VDC ISOPLUS264 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) CPC1916
IXYS Integrated Circuits Solid State Relays - PCB Mount SP, NO ISOPLUS-264
Datasheet
238In Stock
Min.: 1
Mult.: 1

Tube PCB Mount 2.7 A 250 VDC 1 Form A (SPST-NO) 900 mVDC to 1.4 VDC ISOPLUS264 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) CPC1927
IXYS Integrated Circuits Solid State Relays - PCB Mount 8-Pin Power SOIC
Datasheet
1,440In Stock
1,075Expected 12/18/2026
Min.: 1
Mult.: 1

Tube PCB Mount 3 A 20 VAC to 240 VAC 1 Form A (SPST-NO) 900 mVDC to 1.4 VDC ISOPLUS264 SCR 50 mA - 40 C + 85 C 21.082 mm (0.83 in) 3.302 mm (0.13 in) 10.16 mm (0.4 in) CPC1966
IXYS Integrated Circuits Solid State Relays - PCB Mount 5 A 500 V Optic Iso Pwr Sol State Relay
Datasheet
301In Stock
1,050On Order
Min.: 1
Mult.: 1

Tube PCB Mount 2 A 500 VDC 1 Form A (SPST-NO) 900 mVDC to 1.56 VDC ISOPLUS264 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) CPC1968
IXYS Integrated Circuits Solid State Relays - PCB Mount SPST i4-PAC 600V
Datasheet
808In Stock
425Expected 10/2/2026
Min.: 1
Mult.: 1

Tube PCB Mount 1.25 A 600 VDC 1 Form A (SPST-NO) 900 mVDC to 1.4 VDC ISOPLUS264 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) CPC1977