Sealed vs Waterproof Tact Switch: Key Differences
The primary difference between a sealed tact switch and a waterproof tact switch lies in the degree of Ingress Protection (IP) rating. While the terms are often used interchangeably, "sealed" typically refers to "process sealed" switches designed to withstand the flux washing process during PCB manufacturing (often rated IP64 or lower). In contrast, "waterproof" tact switches are engineered to withstand environmental exposure, such as rain, splashes, or temporary submersion during actual device usage, carrying ratings of IP67 or IP68. Choosing the wrong type can lead to switch corrosion, electrical failure, or compromised device longevity.
What Defines a Sealed Switch vs. a Waterproof Switch?
To make the right choice for your electronics project, you must look beyond the marketing terms and look at the technical specifications. The distinction usually comes down to whether the protection is meant for the manufacturing line or the end-user environment.
Process Sealed Switches
A "sealed" switch usually implies it is protected against dust and limited liquid ingress sufficient to survive the PCB soldering and washing process. These switches prevent flux and cleaning solvents from entering the contact area. However, they may not be designed to handle rain or high-humidity outdoor environments indefinitely.
Waterproof Switches (IP67/IP68)
A true waterproof tact switch is designed for robust environmental protection.
- IP67: Dust-tight and protected against temporary immersion in water (up to 1 meter for 30 minutes).
- IP68: Dust-tight and protected against continuous submersion under specific conditions.
Note: If your device requires high-current switching in wet environments, you might need to look beyond standard tact switches. It is worth reviewing the trade-offs in atact switch vs. micro switchcomparison to ensure you have the right actuation force and sealing capabilities.
Comparison: Sealed vs. Waterproof Ratings
Below is a breakdown of how these switches compare in functionality and typical applications.
| Feature | Process Sealed (Standard) | Waterproof (IP67+) |
| IP Rating | Typically IP54 - IP64 | IP67 - IP68 |
| Primary Goal | Protect against flux/soldering | Protect against weather/submersion |
| Dust Protection | Moderate | Excellent (Dust Tight) |
| Water Resistance | Light splash/Washable | Immersion capable |
| Cost | Lower | Higher |
| Typical Use | Indoor appliances, Remote controls | Wearables, Automotive, Outdoor Panels |
What is the difference between IP65 and IP67 tact switches?
IP65 switches are water-resistant, while IP67 switches are waterproof.
An IP65 rating means the switch is protected against low-pressure water jets (like a nozzle spraying from any direction), making it suitable for outdoor panels exposed to rain but not submersion. An IP67 switch goes a step further, allowing the component to be dipped into water up to a meter deep without failing.
For industrial engineers, selecting the right ingress protection is just one part of the puzzle. You must also consider the component's footprint. For example, when deciding on mounting styles for sealed units, understanding the nuances of D-DIP switch vs. through-hole technology ensures the physical seal of the solder joint is as robust as the switch itself.
Can you wash all tactile switches?
No, you can only wash switches that are specifically designated as "washable" or "process sealed."
Standard open-frame tact switches cannot be washed; if water or solvents enter the housing, they can trap contaminants on the metal dome, leading to contact failure. Process sealed switches feature an internal membrane or O-ring (often made of silicone) that seals the top actuator, allowing the PCB to pass through an automated washing station to remove flux residue.
- Tip: Always check the manufacturer’s datasheet for "Washability" specs.
- Warning: Even waterproof switches have limits on the temperature and pressure of the wash cycle.
Do sealed switches last longer?
Generally, yes, because the internal contacts are protected from oxidation and debris.
The primary cause of tact switch failure is contact contamination. Dust, lint, and moisture can increase contact resistance, making the switch unresponsive. A sealed design keeps the silver or gold contacts clean, extending the electrical life cycle (often ranging from 100,000 to 1 million cycles).
When designing complex control boards, longevity is key. While you might be focusing on user input switches now, ensure you apply the same durability standards to your configuration components. Reviewing a DIP switch vs. jumper comparison can help you decide which internal settings components offer the best reliability for your specific sealed enclosure.
Suggested Visuals
- Image 1: A side-by-side diagram showing the internal structure of a standard tact switch vs. an IP67 switch (highlighting the silicone membrane).
- Alt Text: Internal structure diagram comparing open tact switch with IP67 waterproof tact switch showing silicone seal.
- Image 2: An infographic of the IP Code (Ingress Protection), specifically highlighting the '6' (dust) and '7' (water) digits.
Frequently Asked Questions
Tactile refers to the "clicky" feedback you feel when you press the switch. It confirms to the user that the actuation has occurred. This is different from linear switches which may not provide physical feedback.
No. IP67 is for temporary immersion (usually 30 minutes at 1 meter). For permanent underwater usage, you require an IP68 rating, and you must verify the specific depth and time parameters with the manufacturer.
Yes, due to the additional materials required (silicone membranes, O-rings, ultrasonic welding), waterproof switches generally cost more than standard open switches. It is vital to consult industrial switch comparisons to balance budget vs. performance requirements.
Sometimes. The addition of a rubber or silicone seal can slightly dampen the sharp "click" or snap ratio of the switch, making it feel slightly softer compared to a non-sealed equivalent.
Key Takeaways
- Context Matters: "Sealed" usually means protected against manufacturing wash processes, while "Waterproof" means protected against the environment.
- Check the IP: Look for IP67 or IP68 if the device will be used outdoors or near fluids.
- Don't Assume: Not all sealed switches are submersible. Always verify the datasheet.
- Holistic Design: Ensure the mounting style (SMD vs. Through-hole) and surrounding components match the durability of your switch.
Conclusion
Choosing between a sealed and a waterproof tact switch ultimately depends on where your product will live. If you only need to protect the switch during the soldering process, a process-sealed unit is cost-effective. However, for outdoor, automotive, or medical applications, investing in an IP67+ waterproof switch is non-negotiable for reliability.
Ready to select the right component for your board? Review our detailed guides on switch configurations to ensure your entire circuit is built to last.
