ACPL‑339J‑500E optocoupler in SO‑16 package showing optical isolation from LED input to gate drive output in industrial automation and power electronics circuits
The ACPL‑339J‑500E optocoupler is a high‑isolation optical coupling device manufactured by Broadcom Limited (formerly Avago Technologies). It is designed to provide reliable electrical isolation between control and power circuits, making it ideal for applications in power electronics, industrial automation, and systems where noise immunity and safety isolation are critical.
What is the ACPL‑339J‑500E?
At its core, the ACPL‑339J‑500E is a logic output optocoupler optimized for driving switching devices such as IGBTs (Insulated Gate Bipolar Transistors) and MOSFETs. It integrates an isolated LED input with an output stage capable of providing sufficient current to manage gate drive functions.
The ACPL‑339J‑500E offers robust performance suited for demanding environments:
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Isolation Voltage: Rated at 5000 Vrms between input and output, providing strong protection against high voltage transients.
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Optical Coupling Technology: Provides electrical separation while transmitting logic signals via light.
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Package: Surface Mount SO‑16 (16‑pin) package for compact PCB integration.
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Operating Voltage: Typical output supply in the range of 15V to 30V.
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Channel Count: Single‑channel optocoupler supporting one isolation function.
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Common Mode Transient Immunity: Min. 25 kV/µs, enhancing noise immunity in high‑speed switching environments.
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Propagation Delay: Typical maximum around 300ns, suitable for timing‑sensitive control tasks.
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Temperature Range: Designed for industrial ranges (‑40°C to +105°C).
These specifications position the ACPL‑339J‑500E as a flexible and robust isolator for embedded power systems and industrial electronics.
Typical Applications
The ACPL‑339J‑500E optocoupler is used across several engineering domains:
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Motor Drive Systems: Providing isolation for gate drive circuits in brushless DC and AC motor controllers.
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Power Conversion: In inverters and switching power supplies requiring reliable control‑to‑power isolation.
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Industrial Automation: Ensuring noise‑free signal transmission in PLCs and automated systems.
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High‑Voltage Control Interfaces: Where safety isolation between logic and high power stages is necessary.
These application profiles underline the optocoupler’s role in both control logic interfacing and high‑power switching reliability.
Why Isolation Matters in Electronic Design
Electrical isolation prevents high voltages on one side of a circuit from adversely affecting low‑voltage control systems. In practice, this means:
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Enhanced safety, protecting operators and sensitive circuitry.
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Improved noise immunity, crucial in industrial environments.
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Reduced risk of ground loops, which can corrupt signal integrity.
Optocouplers like the ACPL‑339J‑500E accomplish this with optical coupling, where LED light transmits the signal across an isolating barrier, effectively breaking the electrical connection while maintaining communication.
Sourcing and Supply Chain Considerations
As an active part with continued manufacturer support, the ACPL‑339J‑500E is stocked by major electronic distributors such as DigiKey and others. Typical lead times may vary, and engineers should engage with authorized distributors to ensure availability and adherence to quality standards.