What is the output impedance of a 22mm indicator?
Oct 20, 2025
Hey there! As a supplier of 22mm indicators, I often get asked about the output impedance of these nifty little devices. So, I thought I'd take a deep dive into this topic and share some insights with you all.
First off, let's quickly understand what output impedance is. In simple terms, output impedance is the opposition that a device presents to the flow of current at its output terminals. It's like a kind of electrical resistance that affects how the device interacts with other components in a circuit.
Now, when it comes to 22mm indicators, the output impedance can vary depending on a few factors. One of the main factors is the type of technology used in the indicator. For example, LED-based 22mm indicators usually have a relatively low output impedance. LEDs are semiconductor devices, and they typically have a forward voltage drop and a small internal resistance. This low impedance allows them to draw the right amount of current from the power source and light up efficiently.
On the other hand, if we're talking about incandescent 22mm indicators, the output impedance is different. Incandescent bulbs work by heating a filament until it glows. They have a higher resistance compared to LEDs, especially when they're cold. As the filament heats up, its resistance changes, which can also affect the output impedance.
Another factor that influences the output impedance of a 22mm indicator is the internal circuitry. Some indicators may have additional components like resistors, capacitors, or transistors built into them. These components can modify the overall output impedance of the indicator. For instance, a resistor in series with the indicator can increase the output impedance, while a capacitor in parallel can have an impact on the impedance at different frequencies.
So, why does the output impedance of a 22mm indicator matter? Well, it's crucial for proper integration into a larger electrical system. If the output impedance of the indicator doesn't match well with the input impedance of the connected device or circuit, it can lead to issues like signal distortion, reduced efficiency, or even damage to the components.
Let's say you're using a 22mm indicator in a Pendant Control Stations. The pendant control station has its own electrical characteristics, and the output impedance of the indicator needs to be compatible with it. If the impedance is too high or too low, the indicator may not function as expected, and it could cause problems with the overall control system.
Similarly, when using a 22mm indicator in a Station Control Push Button, impedance matching is essential. The push button is designed to interact with other elements in the control station, and the indicator's output impedance plays a role in ensuring smooth operation.
And for those of you looking for more robust options, Anti Vandal Push Button setups also rely on proper impedance matching. These push buttons are often used in harsh environments, and any impedance mismatches can lead to unreliable performance.
As a supplier of 22mm indicators, we understand the importance of providing indicators with the right output impedance for different applications. We test our products rigorously to ensure that they meet the required specifications. Our team of experts is always on hand to help you choose the right indicator based on your specific needs and the electrical characteristics of your system.


If you're in the market for 22mm indicators and have questions about output impedance or any other technical aspects, don't hesitate to reach out. We're here to assist you in finding the perfect solution for your project. Whether you're working on a small-scale DIY project or a large industrial installation, we've got you covered.
In conclusion, the output impedance of a 22mm indicator is a critical factor that can significantly impact its performance in an electrical system. By understanding the factors that influence it and ensuring proper impedance matching, you can ensure that your indicators work efficiently and reliably. So, if you're looking for high-quality 22mm indicators with the right output impedance, give us a shout. We're eager to start a conversation and help you with your procurement needs.
References:
- Electrical Engineering textbooks on circuit theory and device characteristics.
- Manufacturer's datasheets for 22mm indicators.
