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: 288
Select Image Part #
 Mfr.
Description Datasheet Availability Pricing (IDR) 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 Single-Pole Relay 400V 250mA
Datasheet
34In Stock
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) PLA191
IXYS Integrated Circuits Solid State Relays - PCB Mount Single-Pole Relay 400V 250mA
Datasheet
218In Stock
Min.: 1
Mult.: 1

Tube PCB Mount 250 mA 400 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) PLA191
IXYS Integrated Circuits Solid State Relays - PCB Mount Single-Pole Relay 600V 150mA
Datasheet
379In Stock
Min.: 1
Mult.: 1

Tube PCB Mount 150 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) PLA192
IXYS Integrated Circuits Solid State Relays - PCB Mount SPST-NO 6PIN DIP
Datasheet
61In Stock
Min.: 1
Mult.: 1

Tube PCB Mount 100 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) PLA193
IXYS Integrated Circuits Solid State Relays - PCB Mount Single-Pole Relay 600V 100mA
Datasheet
294In Stock
Min.: 1
Mult.: 1

Tube PCB Mount 100 mA 600 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) PLA193
IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A 600V 100mA 5000Vrms Isolation
Datasheet
5In Stock
Min.: 1
Mult.: 1

Tube PCB Mount 130 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) PLA194
IXYS Integrated Circuits Solid State Relays - PCB Mount 350V 100mA Dual-Sing OptoMOS Relay
Datasheet
90In Stock
Min.: 1
Mult.: 1

Tube PCB Mount 100 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) XAA170
IXYS Integrated Circuits Solid State Relays - PCB Mount SPST-NO 6PIN SOP
Datasheet
104In Stock
Min.: 1
Mult.: 1

Tube PCB Mount 100 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) XCA170
IXYS Integrated Circuits Solid State Relays - PCB Mount AC SS Power Switch Dual Power SCR Out
Datasheet
15In Stock
Min.: 1
Mult.: 1

Tube PCB Mount 1.5 A 20 VAC to 240 VAC 1 Form A (SPST-NO) 900 mVDC to 1.5 VDC 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) CPC1964B
IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A 250V 200mA Solid State Relay
Datasheet
14.780On Order
MouseReel Available
Min.: 1
Mult.: 1
Reel: 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 AC Switch 3A, 600V
Datasheet
8.465Expected 16/04/2026
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 SIP-4 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 1-Form-A 60V 1000 mA SSR w/optic MOSFET
Datasheet
5.000Expected 02/04/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1.000

Reel, Cut Tape, MouseReel 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 CPC1965G
IXYS Integrated Circuits Solid State Relays - PCB Mount 600V, 1A AC Solid State Relay
Datasheet
14.426On Order
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 600V 90mA Single OptoMOS Relay
Datasheet
1.200Expected 17/08/2026
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 250V 200mA Solid State Relay
Datasheet
2.100Expected 19/05/2026
Min.: 1
Mult.: 1

Tube 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 Single-Pole Relay 400V 150mA
Datasheet
1.697On Order
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1.000

Reel, Cut Tape, MouseReel PCB Mount 150 mA 400 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) PLA110
IXYS Integrated Circuits Solid State Relays - PCB Mount Single Pole Relay 400V 140mA
Datasheet
271Expected 19/05/2026
Min.: 1
Mult.: 1

Tube PCB Mount 140 mA 400 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) CPC1390
IXYS Integrated Circuits Solid State Relays - PCB Mount SPST i4-PAC 60V
Datasheet
200On Order
Min.: 1
Mult.: 1

Tube PCB Mount 3.5 A 60 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) CPC1908
IXYS Integrated Circuits Solid State Relays - PCB Mount SPST 1 Form A
Datasheet
331On Order
Min.: 1
Mult.: 1

Tube PCB Mount 200 mA 250 VDC 1 Form A (SPST-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) LAA127
IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A; 600V,120mA 5000Vrms Isolation
Datasheet
2.200Factory Stock Available
More Info Available
Min.: 500
Mult.: 100

Tube 120 mA 600 VDC 1 Form A (SPST-NO) CPC1394
IXYS Integrated Circuits Solid State Relays - PCB Mount SP, Normally-Open OptoMOS Relay
Datasheet
950Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

Tube 120 mA 350 VDC 1 Form A (SPST-NO) CPC1540
IXYS Integrated Circuits Solid State Relays - PCB Mount SP, Normally-Open OptoMOS Relay
Datasheet
350Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

Tube PCB Mount 120 mA 350 VDC 1 Form A (SPST-NO) 900 mVDC 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) CPC1540
IXYS Integrated Circuits Solid State Relays - PCB Mount 600V, 0.5mA AC Power Switch
Datasheet
400Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

Tube PCB Mount 500 mA 20 VAC to 260 VAC 1 Form A (SPST-NO) 900 mVDC to 1.5 VDC SCR 50 mA - 40 C + 85 C 9.652 mm (0.38 in) 3.302 mm (0.13 in) 6.35 mm (0.25 in) CPC1963
IXYS Integrated Circuits Solid State Relays - PCB Mount 600V, 0.5mA AC Power Switch
Datasheet
2.000Factory Stock Available
More Info Available
Min.: 1.000
Mult.: 1.000
Reel: 1.000

Reel PCB Mount 500 mA 20 VAC to 260 VAC 1 Form A (SPST-NO) 900 mVDC to 1.5 VDC SCR 50 mA - 40 C + 85 C 9.652 mm (0.38 in) 3.302 mm (0.13 in) 6.35 mm (0.25 in) CPC1963
IXYS Integrated Circuits Solid State Relays - PCB Mount 350V 120mA Dual Single-Pole
Datasheet
250Factory Stock Available
More Info Available
Min.: 250
Mult.: 50

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) LAA100