Product Category Search
Top rated optocouplers
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Best overall
4N35 Optocoupler Phototransistor
Industry-standard optocoupler with high isolation voltage and reliable performance for general-purpose signal isolation.
- Widely available and inexpensive
- High isolation voltage (3550 V)
- Simple to use with through-hole package
- Limited to lower speed applications
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Best budget pick
PC817 Optocoupler
Affordable and widely used in power supplies and industrial controls, offering excellent value for basic isolation needs.
- Very low cost
- Small DIP package
- Adequate for many low-speed applications
- Moderate isolation voltage (5000 V RMS)
- Not for high-speed circuits
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Best for high-speed
6N137 High-Speed Optocoupler
High-speed logic gate optocoupler with 10 MBd data rate, ideal for digital isolation and communication interfaces.
- Fast data rate (10 MBd)
- High isolation voltage (3750 V)
- Compatible with TTL/CMOS
- More expensive than standard optocouplers
- Requires external pull-up resistor
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Best for AC loads
MOC3063 Zero-Crossing Optocoupler
Zero-crossing triac driver ideal for controlling AC loads like motors and lamps, reducing electrical noise.
- Zero-crossing detection for reduced EMI
- Drives triacs directly
- High isolation voltage (7500 V)
- Only for AC loads
- Not for DC switching
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Best for digital signals
H11L1 Optocoupler
Digital output optocoupler with Schmitt trigger, suitable for noisy environments and interface with microcontrollers.
- Schmitt trigger output for noise immunity
- High speed (1 MHz)
- Open collector output
- Requires external pull-up
- Less common than phototransistor types
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Best multi-channel isolation
ISO7240 Quad-Channel Digital Isolator
Quad-channel digital isolator offering high data rates and isolation for bus-level systems, replacing multiple optocouplers.
- 4 channels in one package
- High data rate (150 Mbps)
- Low power consumption
- More expensive per channel
- SMD package requires soldering
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Best for industrial interfaces
ACPL-021L High-Speed Optocoupler
High-speed optocoupler with 10 MBd data rate and wide temperature range, suitable for industrial communication.
- Wide operating temperature (-40°C to +85°C)
- High common-mode rejection
- Compact SO-8 package
- SMD only
- Higher cost
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Best for low-power circuits
SFH610A Optocoupler
Low input current optocoupler ideal for battery-powered devices and low-power logic isolation.
- Low input current (1 mA typical)
- High current transfer ratio
- Wide availability
- Moderate speed
- Through-hole only
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Best compact design
TLP291 Photocoupler
Ultra-thin profile optocoupler in SO-4 package, perfect for space-constrained designs and low-profile applications.
- Very thin package (2.0 mm)
- Surface mount
- Reliable isolation
- Limited current transfer ratio
- Not for high voltage isolation above 3750 V
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