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.

Types of Optocouplers/Photocouplers

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Results: 167
Select Image Part # Mfr. Description Datasheet Availability Pricing (USD) Filter the results in the table by unit price based on your quantity. Qty. RoHS Mounting Style Package/Case Number of Channels Output Type
IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A 100V 100mA Solid State Relay 21,883In Stock
Cut Tape
$3.04
$2.71
$2.56
$2.47
Reel
$1.91
Min.: 1
Mult.: 1
: 2,000
PCB Mount SOP-4 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount SPST-NO 4PIN SOP 26,449In Stock
$3.50
$2.87
$2.69
$2.47
Min.: 1
Mult.: 1
PCB Mount SOP-4 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 60V 1000mA Dual Single-Pole 3,088In Stock
Cut Tape
$18.48
$16.47
$15.72
$15.18
Reel
$12.10
Min.: 1
Mult.: 1
: 1,000
PCB Mount SMD DIP-8 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 350V 120mA Single OptoMOS Relay 10,703In Stock
Cut Tape
$3.64
$3.26
$3.11
$2.95
Reel
$2.34
Min.: 1
Mult.: 1
: 1,000
PCB Mount SMD DIP-4 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 100V Single Pole 100V Power Relay 6,942In Stock
7,550Expected 2027/01/13
$22.18
$19.90
$17.26
$16.61
Min.: 1
Mult.: 1
PCB Mount ISOPLUS264 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 5 A 500 V Optic Iso Pwr Sol State Relay 1,296In Stock
$45.38
$42.47
$38.59
Min.: 1
Mult.: 1
PCB Mount ISOPLUS264 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount SPST NO Relay 40,772In Stock
$5.15
$4.24
$3.97
$3.83
Min.: 1
Mult.: 1
PCB Mount SOP-4 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount AC SS Power Switch Dual Power SCR Out 1,337In Stock
$13.93
$12.41
$10.69
$10.33
$10.00
Min.: 1
Mult.: 1
PCB Mount SIP-4 SCR
IXYS Integrated Circuits Solid State Relays - PCB Mount SPST i4-PAC 60V 200In Stock
$21.07
$18.78
$17.92
$17.31
Min.: 1
Mult.: 1
PCB Mount ISOPLUS264 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount SPST 1 Form A 611In Stock
$10.58
$9.65
$9.27
$8.97
Min.: 1
Mult.: 1
PCB Mount DIP-8 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 1000V Single Pole 1000V Power Relay 160In Stock
$37.01
$33.17
$33.11
$31.45
$27.70
Min.: 1
Mult.: 1
PCB Mount i4-PAC MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount DC Only Single Pole i4-PAC 186In Stock
$20.89
$18.61
$16.56
$15.77
$15.27
Min.: 1
Mult.: 1
PCB Mount i4-PAC MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 350V 120mA Single OptoMOS Relay 1,570In Stock
500Expected 2027/01/13
$3.22
$3.00
$2.81
$2.72
Min.: 1
Mult.: 1
PCB Mount SMD DIP-4 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount SP, NO ISOPLUS-264 204In Stock
$27.06
$25.97
$25.04
$24.25
Min.: 1
Mult.: 1
PCB Mount ISOPLUS264 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount Single Pole Relay 400V 140mA 500In Stock
100Expected 2027/02/08
$4.52
$4.12
$3.77
$3.58
Min.: 1
Mult.: 1
PCB Mount SMD DIP-4 MOSFET
IXYS Integrated Circuits Triac & SCR Output Optocouplers 250V Single Pole SIP Power Relay 424In Stock
$3.01
Min.: 1
Mult.: 1
IXYS Integrated Circuits Solid State Relays - PCB Mount RELAY OPTO 170MA SP-NO 6-SMD 160In Stock
$7.14
$5.92
$5.54
$5.34
Min.: 1
Mult.: 1
PCB Mount DIP-6 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A SSR 4-Pin SOP 115,654In Stock
$1.26
$1.13
$1.08
$1.04
Min.: 1
Mult.: 1
PCB Mount SOP-4 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A 60V 400mA Solid State Relay 192,219In Stock
$3.17
$2.83
$2.63
$2.54
Min.: 1
Mult.: 1
PCB Mount SOP-4 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A 350V 100mA Solid State Relay 8,583In Stock
Cut Tape
$3.34
$2.98
$2.84
$2.71
Reel
$2.26
Min.: 1
Mult.: 1
: 2,000
PCB Mount SOP-4 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount Single Pole Relay 400V 140mA 9,676In Stock
Cut Tape
$4.16
$3.72
$3.55
$3.42
Reel
$3.01
Min.: 1
Mult.: 1
: 1,000
PCB Mount SMD DIP-4 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 1000V Single Pole 1000V Power Relay 583In Stock
$40.40
$38.77
$37.02
$35.75
Min.: 1
Mult.: 1
PCB Mount i4-PAC MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 350V 120mA Dual Single-Pole 7,758In Stock
Cut Tape
$8.78
$7.83
$7.47
$7.22
Reel
$5.79
Min.: 1
Mult.: 1
: 1,000
PCB Mount SMD DIP-8 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 60V 1000mA Dual Single-Pole 4,888In Stock
$19.34
$17.24
$16.47
$15.89
Min.: 1
Mult.: 1
PCB Mount SMD DIP-8 MOSFET
IXYS Integrated Circuits Triac & SCR Output Optocouplers 600V Single Pole SIP Power Relay 6,290In Stock
300Expected 2027/01/08
$7.73
$6.36
$5.54
$5.25
Min.: 1
Mult.: 1
Through Hole SIP-4 1 Channel PhotoSCR