FODM121/124/2701/2705 Transistor Optocouplers

onsemi FODM121/124/2701/2705 Transistor Output Optocouplers consist of a gallium arsenide infrared emitting diode driving a phototransistor in a compact 4-pin mini-flat package. The lead pitch is 2.54mm. The FODM2705 series consists of two gallium arsenide infrared emitting diodes connected in inverse parallel for AC operation. Typical applications for onsemi FODM121/124/2701/2705 Transistor Output Optocouplers include digital logic inputs, microprocessor inputs, power supply monitor, twisted pair line receiver, and telephone line receiver.

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Description Datasheet Availability Pricing (USD) Filter the results in the table by unit price based on your quantity.
Qty. RoHS ECAD Model Mounting Style
Package / Case
Number of Channels
Isolation Voltage
Output Type
Current Transfer Ratio - Min
Current Transfer Ratio - Max
If - Forward Current
Vf - Forward Voltage
Maximum Collector Emitter Voltage
Maximum Collector Current
Maximum Collector Emitter Saturation Voltage
Rise Time
Fall Time
Vr - Reverse Voltage
Pd - Power Dissipation
Minimum Operating Temperature
Maximum Operating Temperature
Series
Packaging
onsemi Transistor Output Optocouplers Phototrans Ouput MFP Input
Datasheet
32,150In Stock
MouseReel Available
Min.: 1
Mult.: 1
Max.: 2,500
: 2,500

SMD/SMT SMD-4 1 Channel 3750 Vrms NPN Phototransistor 100 % 300 % 50 mA 1.3 V 80 V 80 mA 400 mV 3 us 3 us 6 V 150 mW - 40 C + 110 C FODM121 Reel, Cut Tape, MouseReel
onsemi Transistor Output Optocouplers AC In Photo Xsistor Output Optocoupler
Datasheet
20,637In Stock
MouseReel Available
Min.: 1
Mult.: 1
Max.: 2,500
: 2,500

SMD/SMT SMD-4 1 Channel 3750 Vrms NPN Phototransistor 50 % 300 % 50 mA 1.3 V 40 V 80 mA 300 mV 3 us 3 us 6 V 150 mW - 40 C + 110 C FODM2705 Reel, Cut Tape, MouseReel
onsemi Transistor Output Optocouplers Phototransistor Optocoupler
Datasheet
170In Stock
12,000Expected 9/22/2026
Min.: 1
Mult.: 1
Max.: 890

SMD/SMT SMD-4 1 Channel 3750 Vrms NPN Phototransistor 50 % 600 % 50 mA 1.3 V 80 V 80 mA 400 mV 3 us 3 us 6 V 150 mW - 40 C + 110 C FODM121 Tube
onsemi Transistor Output Optocouplers Full pitch MFP PhotoTrans Ouput
Datasheet
2,092In Stock
3,000Expected 10/26/2026
Min.: 1
Mult.: 1
Max.: 430

SMD/SMT SMD-4 1 Channel 3750 Vrms NPN Phototransistor 100 % 300 % 50 mA 1.3 V 80 V 80 mA 400 mV 3 us 3 us 6 V 150 mW - 40 C + 110 C FODM121 Tube
onsemi Transistor Output Optocouplers Phototrans Ouput MFP Input
Datasheet
6,704In Stock
25,000Expected 10/6/2026
MouseReel Available
Min.: 1
Mult.: 1
Max.: 410
: 2,500

SMD/SMT SMD-4 1 Channel 3750 Vrms NPN Phototransistor 100 % 300 % 50 mA 1.3 V 80 V 80 mA 400 mV 3 us 3 us 6 V 150 mW - 40 C + 110 C FODM121 Reel, Cut Tape, MouseReel
onsemi Transistor Output Optocouplers Phototrans Ouput MFP Input
Datasheet
1,981In Stock
25,000Expected 9/22/2026
MouseReel Available
Min.: 1
Mult.: 1
Max.: 2,500
: 2,500

SMD/SMT SMD-4 1 Channel 3750 Vrms NPN Phototransistor 50 % 150 % 50 mA 1.3 V 80 V 80 mA 400 mV 3 us 3 us 6 V 150 mW - 40 C + 110 C FODM121 Reel, Cut Tape, MouseReel
onsemi Transistor Output Optocouplers Full pitch MFP PhotoTrans Ouput
Datasheet
8In Stock
3,000Expected 10/6/2026
Min.: 1
Mult.: 1

SMD/SMT SMD-4 1 Channel 3750 Vrms NPN Phototransistor 100 % 200 % 50 mA 1.3 V 80 V 80 mA 400 mV 3 us 3 us 6 V 150 mW - 40 C + 110 C FODM121 Tube
onsemi Transistor Output Optocouplers Phototrans Ouput MFP Input
Datasheet
784In Stock
7,500Expected 9/15/2026
MouseReel Available
Min.: 1
Mult.: 1
Max.: 2,500
: 2,500

SMD/SMT SMD-4 1 Channel 3750 Vrms NPN Phototransistor 100 % 200 % 50 mA 1.3 V 80 V 80 mA 400 mV 3 us 3 us 6 V 150 mW - 40 C + 110 C FODM121 Reel, Cut Tape, MouseReel
onsemi Transistor Output Optocouplers Phototrans Ouput MFP Input
Datasheet
1,710In Stock
2,500Expected 9/22/2026
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

SMD/SMT SMD-4 1 Channel 3750 Vrms NPN Phototransistor 100 % 200 % 50 mA 1.3 V 80 V 80 mA 400 mV 3 us 3 us 6 V 150 mW - 40 C + 110 C FODM121 Reel, Cut Tape, MouseReel
onsemi Transistor Output Optocouplers Phototransistor Output Optocoupler
Datasheet
1,703In Stock
2,500Expected 9/22/2026
MouseReel Available
Min.: 1
Mult.: 1
Max.: 430
: 2,500

SMD/SMT SMD-4 1 Channel 3750 Vrms NPN Phototransistor 50 % 600 % 10 mA 1.3 V 80 V 80 mA 400 mV 3 us 3 us 6 V 150 mW - 40 C + 110 C FODM121 Reel, Cut Tape, MouseReel
onsemi Transistor Output Optocouplers EMITTER ED-010IRC LT210IRGTK110IRGDET
Datasheet
25In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

SMD/SMT SMD-4 1 Channel 3750 Vrms NPN Phototransistor 50 % 600 % 50 mA 1.3 V 80 V 80 mA 400 mV 3 us 3 us 6 V 150 mW - 40 C + 110 C FODM121 Reel, Cut Tape, MouseReel
onsemi Transistor Output Optocouplers 4SO TR
Datasheet
2,867In Stock
Min.: 1
Mult.: 1

SMD/SMT SMD-4 1 Channel 3750 Vrms NPN Phototransistor 50 % 600 % 50 mA 1.3 V 80 V 80 mA 400 mV 3 us 3 us 6 V 150 mW - 40 C + 110 C FODM121
onsemi Transistor Output Optocouplers Phototransistor Output Optocoupler
Datasheet
5,316In Stock
Min.: 1
Mult.: 1
Max.: 370

SMD/SMT SMD-4 1 Channel 3750 Vrms NPN Phototransistor 100 % 1200 % 50 mA 1.3 V 80 V 80 mA 400 mV 3 us 3 us 6 V 150 mW - 40 C + 110 C FODM124 Tube
onsemi Transistor Output Optocouplers Phototransistor Output Optocoupler
Datasheet
4,617In Stock
15,000On Order
MouseReel Available
Min.: 1
Mult.: 1
Max.: 980
: 2,500

SMD/SMT SMD-4 1 Channel 3750 Vrms NPN Phototransistor 100 % 1200 % 50 mA 1.3 V 80 V 80 mA 400 mV 3 us 3 us 6 V 150 mW - 40 C + 110 C FODM124 Reel, Cut Tape, MouseReel
onsemi Transistor Output Optocouplers Phototransistor Out VDE Certified
Datasheet
340In Stock
2,500Expected 9/22/2026
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

SMD/SMT SMD-4 1 Channel 3750 Vrms NPN Phototransistor 100 % 1200 % 50 mA 1.3 V 80 V 80 mA 400 mV 3 us 3 us 6 V 150 mW - 40 C + 110 C FODM124 Reel, Cut Tape, MouseReel
onsemi Transistor Output Optocouplers Phototransistor Output Optocoupler
Datasheet
3,160In Stock
15,000On Order
MouseReel Available
Min.: 1
Mult.: 1
Max.: 2,500
: 2,500

SMD/SMT SMD-4 1 Channel 3750 Vrms NPN Phototransistor 50 % 300 % 50 mA 1.3 V 40 V 80 mA 300 mV 3 us 3 us 6 V 150 mW - 40 C + 110 C FODM2701 Reel, Cut Tape, MouseReel
onsemi Transistor Output Optocouplers AC In Phototransistr Output Optocoupler
Datasheet
4,729In Stock
Min.: 1
Mult.: 1
Max.: 370

SMD/SMT SMD-4 1 Channel 3750 Vrms NPN Phototransistor 50 % 300 % 50 mA 1.3 V 40 V 80 mA 300 mV 3 us 3 us 6 V 150 mW - 40 C + 110 C FODM2705 Tube
onsemi Transistor Output Optocouplers Phototrans Ouput MFP Input
Datasheet
2,412In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

SMD/SMT SMD-4 1 Channel 3750 Vrms NPN Phototransistor 50 mA 1.4 V 40 V 80 mA 300 mV 6 V 150 mW - 40 C + 110 C FODM2705 Reel, Cut Tape, MouseReel
onsemi Transistor Output Optocouplers Phototransistor Output Optocoupler
Datasheet
24,893On Order
Min.: 1
Mult.: 1
Max.: 3,000

SMD/SMT SMD-4 1 Channel 3750 Vrms NPN Phototransistor 50 % 300 % 50 mA 1.3 V 40 V 80 mA 300 mV 3 us 3 us 6 V 150 mW - 40 C + 110 C FODM2701 Tube
onsemi Transistor Output Optocouplers Full pitch MFP PhotoTrans Ouput
Datasheet
6,000Expected 10/26/2026
Min.: 1
Mult.: 1

SMD/SMT SMD-4 1 Channel 3750 Vrms NPN Phototransistor 50 % 150 % 50 mA 1.3 V 80 V 80 mA 400 mV 3 us 3 us 6 V 150 mW - 40 C + 110 C FODM121 Tube
onsemi Transistor Output Optocouplers Phototrans Ouput MFP Input
Datasheet
Lead-Time 26 Weeks
Min.: 1
Mult.: 1

SMD/SMT SMD-4 1 Channel 3750 Vrms NPN Phototransistor 50 mA 1.3 V 80 V 80 mA 400 mV 6 V 150 mW - 40 C + 110 C FODM121 Tube