Rocker Switch Drawing
What is a 3 Pin Rocker Switch?
A 3 pin rocker switch is an electrical control component characterized by a "rocking" mechanism that alternates between three distinct states. The FL3-KCD1-121-13X model operates as a Single Pole Double Throw (SPDT) device with an ON-OFF-ON function. It is designed to manage two separate circuits or provide multi-directional control within a single compact circular housing. This switch is a standard for engineers seeking reliable, non-illuminated manual power management.
Product Overview
The FILN 3 pin rocker switch is a market-standard KCD1 round mini switch featuring a unique "top-round, bottom-square" design. This non-illuminated black model provides a clean, versatile aesthetic suitable for professional control panels. Manufactured using high-grade Nylon PA66 and AgCdO12 silver contacts, it ensures superior electrical conductivity and thermal stability. With global certifications including ISO9001, CE, VDE, RoHS, SGS, UL, and IP65, this switch is the preferred choice for industrial machinery, medical devices, and high-end consumer appliances.
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Click to View All FILN Rocker Switch Series →Quick Specifications
| Model Number | FL3-KCD1-121-13X |
| Mounting Diameter | φ19.6MM / 0.77 inches |
| Switch Function | ON-OFF-ON (3-Position) |
| LED / Lamp Status | Non-Illuminated |
| Terminal Pins | 3-Pin Quick Connect |
| Appearance | Round Head / Black Housing |
Performance Parameters
| Rated Voltage/Current | 30A 250VAC / 18(12)A 125VAC |
| Contact Resistance | ≤50mΩ |
| Insulated Resistance | ≥100mΩ / 500VDC |
| Dielectric Strength | 1500VAC / 5mA 60s |
| Electrical Endurance | 10,000 Cycles |
| Ambient Temperature | -40℃ to +125℃ |
| Protection Rating | IP65 / IP66 |
Component Materials
| Accessories Name | Material |
|---|---|
| Transparent Sheet | PC |
| Bottom Base | PA66 (Nylon) |
| Contact Points | AgCdO12 (Silver Alloy) |
| Pin / Spring Board | H62 Brass |
| Waterproof Cover | Nitrile Rubber |
General Characteristics
| Application | KCD1 Series Rocker switch general use |
| Relative Humidity | 45% ～ 85% |
| Air Pressure | 86 ～ 106 Kpa |
| Atmospheric Test Condition | 5℃ ～ 35℃ Ambient Temp |
Detailed Reliability Tests
| Project | Test Condition & Requirement |
|---|---|
| Contact Resistance | Measured at small currents (1KHz) ≤50mΩ |
| Terminal Strength | 80N static load for 60s without damage |
| Solderability | 235±5℃ for 3s; >90% coverage |
| Mechanical Life | 20,000 cycles without load (60 ops/min) |
| Thermostability | 72h at 125±2℃; structure remains intact |
Broad Application Range
The 3 pin rocker switch is ubiquitous in power control systems. Its 3-position design is ideal for functions requiring a central "OFF" state between two active modes. Common applications include:
- Appliances: Coffee machines, water dispensers, and air fryers.
- Medical: Diagnostic ultrasound and centrifugal equipment.
- Industrial: CNC control panels and power distribution boxes.
- Transportation: RV lighting, marine cabin controls, and dash functions.
Installation Guide
- Cutout: Create a precise φ19.6MM round opening in your panel.
- Insertion: Align the switch and press it into the panel from the front.
- Securing: The integrated snap-in side clips will automatically lock the switch in place.
- Wiring: Connect your common power line to the center pin and device loads to the outer pins.
Complete 3 Pin 3 Way Rocker Switch Wiring Diagram and Guide
A 3 pin rocker switch wiring diagram is vital for projects requiring control over two separate electrical circuits. This specific configuration, commonly found in KCD1 series switches, operates as a Single Pole Double Throw (SPDT) switch with an "On-Off-On" functionality. It allows a single power source to alternate between two different devices or to remain in a central neutral position where both are disconnected.
How to Wire a 3 Pin 3 Way Rocker Switch: Step-by-Step Instructions
Wiring a 3-way non-illuminated switch involves managing a common power input and two independent output loads. Follow these steps for a correct setup:
- 1. Central Power Input (Common Pin): Connect the positive (+) wire from your power supply to the middle pin of the rocker switch. This pin acts as the common terminal that distributes power to the other two pins.
- 2. Device 1 Connection: Connect the bottom pin of the switch to the positive input of your first device (Device 1). In the "Down" position, the circuit to this device is closed.
- 3. Device 2 Connection: Connect the top pin of the switch to the positive input of your second device (Device 2). In the "Up" position, power is redirected here.
- 4. Grounding the Circuit: Connect the negative (-) terminals of both Device 1 and Device 2 directly back to the negative terminal of the power source. As this is a non-illuminated switch, the switch itself does not require a ground connection.
Switch Operation Logic Table
| Switch State | Device 1 Status | Device 2 Status |
|---|---|---|
| UP Position | OFF | ON (Active) |
| Normal (Middle) | OFF (Resting) | OFF (Resting) |
| DOWN Position | ON (Active) | OFF |
Technical Installation Considerations
- On-Off-On Functionality: This 3-pin configuration is unique because the center position acts as a complete "Off" state for both devices, making it perfect for reversing motors or toggling between two different lighting modes.
- KCD1 Series Ratings: Most KCD1 switches are rated for 6A 250VAC or 10A 125VAC. Ensure your load does not exceed these electrical specifications to prevent internal contact welding.
- Wire Termination: For high-current applications, use high-quality female spade connectors. Ensure they are snugly fitted to the 4.8mm or 6.3mm terminals to maintain low resistance and prevent heat buildup.
Figure 1: 3-Pin 3-Way Rocker Switch Connection Schematic
Industrial Utility: How 3-Way Rockers Function
In industrial environments, the 3 pin rocker switch serves as a critical interface for "A-OFF-B" logic. Unlike a simple 2-pin ON-OFF switch, the 3-pin ON-OFF-ON variant allows operators to toggle between two functional modes—such as switching between "Manual" and "Automatic" operation—while providing a central neutral state to ensure safety during maintenance. This mechanical simplicity reduces the risk of electrical failure compared to complex digital controllers, offering a rugged, tactile solution for high-load systems.
FILN Factory Direct Supply
FILN is a world-class manufacturer of premium switching components. We offer:
- No MOQ for standard models.
- Fast Delivery on all KCD1 series.
- Voltage Customization.
- Wire Length Customization.
- Connector Customization.
- Global Shipping.
Official Website: www.filn.com
Email: inquiry@cnylin.com.cn
Frequently Asked Questions
1. What is a 3 pin rocker switch without a light?
It is an ON-OFF-ON SPDT switch that uses three terminals to control two circuits without an internal LED indicator.
2. Can I use this 3 pin non-lighted switch for motor reversing?
Yes, an ON-OFF-ON 3-pin switch is commonly used in DC circuits to change polarity and reverse motor direction.
3. What is the benefit of a non-illuminated 3 pin rocker switch?
Non-lighted switches have no internal lamp to burn out, offering higher reliability and a simpler 3-wire connection.
4. Does the FL3-KCD1-121-13X fit a standard 19mm hole?
Yes, it is designed for a φ19.6MM (0.77 inch) mounting cutout, which is standard for mini rocker switches.
5. Is this 3 pin 3 way rocker switch waterproof?
It carries an IP65 rating, making it splash-proof and suitable for humid industrial environments.
6. What is the current rating for this 3 pin rocker switch?
It is rated for 30A 250VAC, which is high enough for most industrial and commercial appliances.
7. How do I wire a 3 pin rocker switch?
Connect the power source to the middle pin and your two loads to the outer pins to alternate power between them.
8. Is Nylon PA66 used in the housing?
Yes, FILN uses high-temperature Nylon PA66 for the base to ensure fire safety and structural durability.
9. Can FILN provide custom wire harnesses for 3 pin switches?
Yes, we offer full customization including pre-soldered wires and specific connector types for your production line.
10. Does this 3 pin rocker switch have UL certification?
Yes, our KCD1 series is fully certified by UL, CE, and VDE for international compliance.
Dear Valued Customers,
At FILN, we specialize in delivering precision-engineered indicator lights, push button switches, and rocker switches tailored to your unique requirements. While our products default to standard voltage ranges (12-24V and 110-220V), we understand that specialized applications demand flexibility.
Need a Custom Voltage Solution? Simply inform us of your desired voltage specifications (e.g., 5V, 48V, or non-standard ranges), and our engineering team will craft a solution within 10-15 business days.
Why Choose FILN for Custom Manufacturing?
✅ Expertise You Can Trust: Over 20 years of experience in industrial-grade electronic component production.
✅ End-to-End Customization: From voltage adjustments to bespoke designs (shape, color, IP rating), we adapt to your needs.
✅ Quality Guaranteed: All custom orders undergo rigorous testing to meet CE/RoHS/IP65 standards.
✅ Scalable Support: Whether prototyping or bulk orders, we ensure seamless delivery.
How It Works
Consultation: Share your technical requirements via email or our contact form.
Design & Approval: Receive 3D models or samples for confirmation.
Production & QC: Precision manufacturing with real-time updates.
Global Shipping: Trackable logistics to your doorstep.
Contact Us Today
Email: inquiry@cnylin.com.cn
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