If you’ve ever used a vending machine, a industrial control panel, or even a high-security locker, you’ve probably come across a metal key switch without realizing it. This small but mighty electrical component is everywhere—because it’s built to last, work reliably in tough conditions, and keep circuits secure by only letting authorized users turn them on or off. But what exactly is a metal key switch? How does it differ from plastic ones? And how do you pick the right one for your project? Let’s break it all down, step by step.
A metal key switch is an electrical component that controls whether a circuit is “on” or “off”—but here’s the catch: it only works with a specific, authorized key. Unlike regular switches you flip with your finger, this one adds a layer of security, making sure only people with the right key can operate the device it’s attached to.
You’ll find these switches in places where both durability and security matter. Think: industrial machines (where dust and moisture are common), vending machines (to prevent tampering), access control systems (like gates or entry doors), and even medical equipment (where precision and reliability are non-negotiable). The “metal” part isn’t just for show, either—it’s what makes these switches tough enough to handle daily wear, harsh environments, and even accidental bumps.
Here’s what makes metal the better choice for many projects:
Durability That Saves Money: Plastic switches crack, fade, or break easily—especially if they’re exposed to sunlight, chemicals, or rough handling. A metal switch can take that abuse and keep working, so you won’t have to replace it as often. Over time, that means lower maintenance costs.
Security You Can Trust: Plastic switches are easy to tamper with (you could even pry one open with a screwdriver). Metal housings are much harder to break into, and the key requirement adds another barrier against unauthorized use. If you’re protecting expensive equipment or sensitive circuits, this matters.
Better Performance in Harsh Conditions: If your switch is going to be in a factory (full of dust), a restaurant (damp and greasy), or outside (rain and snow), plastic will fail fast. Metal’s resistance to moisture, dust, and temperature changes (most work from -20°C to 85°C) means it won’t let you down.
A Premium Look That Boosts Your Product: Let’s be honest—appearance sells. A metal key switch makes your product look more reliable and high-quality. Many of our customers (from industrial equipment makers to vending machine companies) have switched from plastic to metal, and they’ve noticed customers perceive their products as “better built” right away.
| Feature | Details |
| Materials |
- Housing: Stainless steel, brass, or aluminum alloy (resists rust, dents, and corrosion). - Internal Parts: Engineering plastics + metal contacts (ensures smooth operation and long life). |
| Operation Types |
- Latching: Once you turn the key to “on” or “off, ” it stays in that position (no need to hold the key). Great for devices that need constant power (like a machine that runs for hours). - Momentary: The switch only stays “on” while you hold the key—let go, and it shuts off. Perfect for temporary actions (like opening a gate or triggering a single function). |
| Environmental Resistance | Most models are dustproof (IP65 or higher) and waterproof (some up to IP67). This means they work in factories, outdoor settings, or damp areas without failing. |
| Security Level | Uses unique key profiles—so you can’t just use any key to operate it. Some brands even offer “keyed different” (each switch needs a unique key) or “keyed alike” (multiple switches use the same key) options for convenience. |
| Service Life | Typically 50, 000+ operations (some up to 100, 000). Compare that to plastic switches, which often wear out after 10, 000–20, 000 uses—metal ones last 2–5x longer. |
YIJIA is a Zhejiang-based company that manufactures metal pushbutton switches in China. We hold CE, CCC, TUV, and ISO9001 certifications. Contact us today to inquire and purchase!
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