In the world of industrial electronics, compact, reliable rotary switches are the unsung heroes of control systems. Today, we dive into a standout model: the 16mm 3-Pin Waterproof Small Rotary Switch with 2/3 position options, reset self-lock functionality, 1NO1NC contact configuration, and robust 3A/250V ratings. Let’s break down why this switch is a game-changer for B2B applications.
1. Compact Design: Space-Saving Power
At just 16mm in size, this rotary switch is ideal for space-constrained devices like handheld tools, portable electronics, or compact industrial controls. Its 3-pin configuration ensures clean wiring and efficient integration into tight PCB layouts, making it a perfect fit for miniaturized designs.
2. Waterproof Protection: Rugged Reliability
The waterproof rating (IP65/IP67, depending on the specific model) makes this switch a no-brainer for harsh environments. Whether it’s outdoor equipment exposed to rain, industrial machinery in wet factories, or medical devices in high-humidity zones, the waterproof design ensures long-term reliability without corrosion or electrical faults.
3. Position & Functionality: Versatile Control
- 2/3 Position Options: Choose between 2 or 3 detented positions to match your application’s control requirements. The detent mechanism provides tactile feedback, ensuring precise and repeatable position selection.
- Reset Self-Lock: This feature is a game-changer for safety-critical applications. After a reset action (e.g., emergency stop), the switch automatically locks into the reset position, preventing accidental reactivation. It’s perfect for machinery, medical devices, or any system requiring fail-safe control.
- 1NO1NC Contact Configuration: The Normally Open (NO) and Normally Closed (NC) contacts offer flexible circuit design. You can use the NO contact for “on” functions and the NC contact for “off” or “backup” functions, enabling complex control logic with a single switch.
4. Electrical Ratings: Industrial-Grade Durability
With a 3A current rating and 250V voltage rating, this switch is built for heavy-duty applications. Whether you’re controlling motors, solenoids, or high-power circuits, the robust electrical specs ensure reliable performance without overheating or contact failure.
5. B2B Applications: Where It Shines
This rotary switch is a perfect fit for:
- Industrial Machinery: CNC machines, robotic arms, or material handling equipment (where compact size and waterproofing are critical).
- Medical Devices: Portable diagnostic tools, patient monitors, or surgical equipment (where reset self-lock ensures patient safety).
- Automotive & Transportation: Dashboard controls, in-vehicle systems, or EV components (where space and reliability are top priorities).
- Consumer Electronics: Smart home devices, power tools, or portable gadgets (where compact design and user-friendly detents are key).
6. Why Choose This Switch?
- Compact Size: Ideal for miniaturized designs.
- Waterproofing: Rugged enough for harsh environments.
- Versatile Functionality: 2/3 positions, reset self-lock, and 1NO1NC contacts cover most control needs.
- Industrial-Grade Ratings: 3A/250V ensure reliability in heavy-duty applications.



