H11C4 FAIRCHILD OPTOCOUPLER SCR OUT 400V 6DIP

The Fairchild H11C4 is a high-performance optocoupler designed to provide superior galvanic isolation between low-voltage control circuits and high-voltage AC or DC power lines. Featuring a gallium arsenide infrared emitting diode optically coupled to a light-activated silicon controlled rectifier (SCR), this device is engineered for maximum safety and reliability in demanding industrial environments. The H11C4 is specifically rated for a peak blocking voltage of 400V, making it an ideal choice for controlling high-voltage loads such as motors, solenoids, and high-power lamps. By utilizing light as the medium for signal transmission, it effectively eliminates the risk of electrical noise or high-voltage surges damaging sensitive microcontrollers or logic circuits, ensuring the longevity and stability of your entire electronic system.

Housed in a standard 6-pin Dual In-line Package (DIP), the H11C4 is easy to integrate into both breadboard prototypes and high-density printed circuit boards. The 6DIP configuration provides sufficient physical spacing between the input and output pins to meet stringent safety standards for creepage and clearance. This physical separation is critical for applications requiring high isolation voltage ratings, typically reaching up to 5300V RMS. The SCR output is capable of handling significant surge currents, which is essential when dealing with inductive loads that can produce large back-EMF spikes. This robustness makes the H11C4 a preferred component for solid-state relays, industrial controls, and any application where mechanical relays are too slow, too noisy, or prone to wear and tear over time.

One of the primary advantages of the Fairchild H11C4 is its high sensitivity and fast response time. The infrared LED requires minimal input current to trigger the SCR, allowing it to be driven directly by standard CMOS or TTL logic levels without the need for additional amplification stages. Once triggered, the SCR output remains latched until the current drops below the holding threshold, a characteristic that is particularly useful for phase control and AC power switching applications. This allows for precise control over power delivery in heating elements or lighting dimmers. The H11C4’s ability to operate reliably across a wide temperature range ensures that it maintains its performance characteristics even in harsh industrial settings where thermal fluctuations are common.

In terms of application versatility, the H11C4 is a true workhorse in the semiconductor world. It is frequently employed in static power switches, AC motor starters, and as a trigger for larger, high-power TRIACs or SCRs in complex power management systems. Because it provides a purely electronic switching solution, it eliminates the contact bounce and electromagnetic interference (EMI) associated with traditional mechanical switches. This leads to cleaner power delivery and reduced maintenance costs, as there are no moving parts to fail. For engineers designing modern smart home devices or industrial automation modules, the H11C4 offers a compact and efficient solution for interfacing digital intelligence with high-voltage power execution, bridging the gap between software and physical action.

Fairchild, now a part of ON Semiconductor, has a long-standing reputation for manufacturing semiconductors with exceptional quality and consistency. The H11C4 is built to these rigorous standards, ensuring that each unit performs predictably within its specified parameters. This reliability is crucial for safety-critical applications where a failure in isolation could lead to equipment damage or personal injury. When you choose the H11C4, you are selecting a component that has been proven through years of field use across various industries. Its combination of high voltage capability, high isolation, and ease of use makes it an indispensable tool for any electronics professional or serious hobbyist working with power electronics or industrial control systems.

Ensure the safety and efficiency of your next high-voltage project by incorporating the Fairchild H11C4 SCR Output Optocoupler into your design. Whether you are building a custom solid-state relay or protecting a sensitive microcontroller from industrial transients, this 400V rated optoisolator provides the robust protection and reliable switching performance you need. Our stock of H11C4 components is carefully sourced to guarantee authenticity and performance, providing you with peace of mind for your mission-critical applications. Don't compromise on circuit protection or switching reliability. Purchase your H11C4 optocouplers today and take the first step toward building more resilient and professional-grade electronic systems. Add them to your cart now to benefit from industry-leading isolation technology and Fairchild's proven semiconductor expertise.