Rocker Switch ON-OFF 15A KCD4 4 Pin Power Control LED Ligtht FILN Factory

Rocker Switch Drawing

What is a Rocker Switch ON-OFF?

A rocker switch ON-OFF is an electromechanical component used to connect or disconnect an electrical circuit through a pivoting motion. The FL3-KCD4-010-21 is a standard rectangular KCD4 series switch designed for high-reliability power control in industrial and domestic environments. Featuring a 30X22MM mounting hole and 4-pin terminals, this switch provides a stable interface for managing currents up to 15A. Its primary function is to serve as a master power gate, ensuring safe operation of electrical equipment.

Product Overview

The FILN KCD4 series rocker switch ON-OFF is engineered for versatility and durability. These 30X22MM rectangular switches are widely used in power strips, kitchen appliances, and industrial control panels. Our switches are manufactured under ISO9001 standards and carry CE, VDE, RoHS, SGS, and UL certifications. The 4-pin configuration allows for DPST (Double Pole Single Throw) control, enabling the switch to break both the hot and neutral lines simultaneously for enhanced safety. The illuminated versions feature high-brightness LEDs (Red, Green, Yellow, Blue, White) that provide clear status feedback in dark environments, while the classic black non-illuminated models offer a professional, universal look.

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Switch Function Logic Comparison

Function Type	Operation Principle	State Logic
ON-OFF	Standard Latching Power Control	Stays in "On" or "Off" position manually.
ON-ON	Two-Way Selection Latching	Switches between two active load circuits.
(ON)-OFF	Momentary ON	Returns to "Off" when the button is released.
ON-(OFF)	Momentary OFF	Normally "On", breaks circuit only while pressed.
ON-(ON)	Latching ON with Momentary Secondary	Stays on position 1, springs back from position 2.

Quick Specifications

Model Series	FL3-KCD4-010-21
Mounting Dimensions	30X22MM (Snap-in Type)
Function	ON-OFF / ON-ON / (ON)-OFF / ON-(OFF) / ON-(ON)
LED Light Colors	R/G/Y/B/W
Actuator Material	High-grade Plastic Surface
Terminal Layout	4-Pin Spade Terminals

Electrical Performance Parameters

Main Technology Performance	Specification Value
Rated Voltage	15A 250VAC / 20A 125VAC (5-24V Support)
Initial Contact Resistance	≤50mΩ
Insulated Resistance	≥100mΩ / 500VDC
Dielectric Strength	1500VAC / 5mA 60s
Endurance (Life Cycle)	10,000 Operations Minimum
Ambient Temperature	-40°C to +125°C
Protection Degree	IP40 (Indoor Use Only)
Certifications	ISO9001, CE, VDE, RoHS, SGS, UL

Component Materials

Accessories Name	Material Specification
Transparent Sheet	High-clarity PC
Light Guiding Part	Optical PC
Housing Holder	Fire-retardant ABS
Up / Bottom Base	PA66 + ABS Alloy
Pins / Terminals	H62 Brass (Silver Plated)
Contact Points	AgCdO12 (Silver Alloy)
Internal Spring	72# Manganese Steel
Light Source	Low-Heat LED Lamp

Global Applications

The rocker switch ON-OFF is a critical component for power management. It is widely utilized in household appliances like air fryers and water dispensers, office equipment such as printers and power strips, and industrial controls where 15A current handling is mandatory.

Installation Guide (Snap-In Method)

1. Panel Cut: Create a 30X22MM rectangular opening in your panel.
2. Insertion: Align the switch and push it firmly from the front side into the hole.
3. Auto-Lock: The integrated clips on both sides of the switch will snap into place, securing the housing.
4. Wiring: Connect your 4-pin female spade connectors to the terminals according to your circuit schematic.

Complete Rocker Switch Wiring Diagram and Connection Guide

A 4 pin rocker switch wiring diagram is essential for managing higher-current loads or providing clear visual feedback in electrical systems. These switches are typically Double Pole Single Throw (DPST) or specialized single-pole configurations that allow the internal lamp to function independently or in synchronization with the connected device. Depending on your requirements, rocker switch wiring can be configured for either "Independent Illumination" (Always On) or "Dependent Illumination" (On when Device is Active).

Option 1: Light On When Device is Operating (Dependent Illumination)

This configuration is ideal when you need a visual status indicator to show that the equipment is currently powered. In this mode, the internal LED only illuminates when the switch is toggled to the "Press" position.

• Input Connection: Connect the positive (+) and negative (-) wires from the power source to the bottom set of pins.
• Output Connection: Connect the positive and negative terminals of your device to the top set of pins.
• Logic: When the switch is closed, current flows through the device and simultaneously completes the internal circuit for the LED lamp.

Figure 1: Wiring for LED illumination during device operation.

Option 2: Switch Light Remains Constantly Lit (Independent Illumination)

This setup is useful for locating the switch in dark environments (such as vehicle dashboards or industrial control panels). The internal LED remains on as long as the power source is connected, regardless of the device status.

• Input Connection: Connect the power source positive (+) and negative (-) wires to the top set of pins (where the internal lamp is internally bridged).
• Output Connection: Connect the device terminals to the bottom set of pins.
• Logic: The LED is powered directly by the input line, while the rocker mechanism acts as a gatekeeper only for the current flowing to the device.

Figure 2: Wiring for constant LED illumination (Switch Finder Mode).

Comparison of Operation Logic

Configuration Type	Switch State	Device Status	LED Status
Dependent (Option 1)	Normal	OFF	OFF
	Press	ON	ON
Independent (Option 2)	Normal	OFF	ON
	Press	ON	ON

Technical Considerations & Safety Notes

• Pin Orientation: 4-pin rocker switches usually have two parallel circuits. Ensure you are wiring the positive and negative on the correct pairs to avoid a short circuit.
• Voltage Matching: Check if the internal lamp is designed for 12V DC or 110V/220V AC. Using an AC lamp on a DC circuit will result in no light, while the reverse may cause the lamp to explode.
• Amperage Ratings: Most 4-pin industrial switches (like the KCD4 series) support up to 15A-30A. Verify that your total load does not exceed the manufacturer's specification.
• Termination: Use high-quality 6.3mm female spade connectors. Ensure they are fully insulated to prevent accidental contact between adjacent terminals.

How Rocker Switch Works?

The mechanical principle of a rocker switch ON-OFF involves a seesaw-like actuator. When one side is pressed, an internal bridge tilts to make contact with stationary terminals, completing the circuit. FILN's 15A high-current design uses silver alloy contact points to prevent carbon buildup and "arcing," ensuring a lifespan of over 10,000 cycles. This split-body design is optimized for heat management in high-load scenarios, though it is intended for indoor use as it lacks an external waterproof seal.

FILN Factory Direct Supply

• ✅ No MOQ: Direct procurement for any project size.
• ✅ Fast Delivery: Global logistics from our ISO-certified facility.
• ✅ Customization: Wire length, connector type, and voltage (5V-220V) tailoring.

Request Free Samples

Official Website: www.filn.com
Engineering Support: [email protected]

Frequently Asked Questions (FAQ)

1. What is the standard mounting size for the KCD4 4-pin rocker switch?
The industry-standard mounting size for this rectangular rocker switch is 30X22MM.

2. Can I use this 4-pin switch for 12V DC and 220V AC?
Yes, the switch can handle both. However, the internal LED voltage must be specified (e.g., 12V or 220V) for the light to work correctly.

3. Is this 15A rocker switch waterproof?
No, the standard FL3-KCD4-010-21 is designed for indoor use. For outdoor applications, a dedicated waterproof cover is required.

4. How many terminals does an illuminated KCD4 switch have?
This specific model features a 4-pin terminal layout, allowing for double pole control with integrated lighting.

5. What is the difference between ON-OFF and (ON)-OFF?
ON-OFF is latching (stays in position), whereas (ON)-OFF is momentary (springs back to the OFF position when released).

6. Does the light stay on when the switch is OFF?
In a "Dependent" wiring setup, the light only turns on when the switch is set to ON. It can be wired as "Independent" to stay on constantly.

7. What current can this 30X22MM switch handle?
It is rated for a high current capacity of 15A 250VAC or 20A 125VAC.

8. Are different LED colors available for the 4-pin switch?
Yes, we offer Red, Green, Yellow, Blue, and White LED options, as well as non-lighted black actuators.

9. How do the side clips work for installation?
The snap-in design features plastic wings that compress during insertion and expand once through the panel to lock the switch in place.

10. Does FILN provide certifications for international markets?
Yes, we provide full CE, UL, RoHS, and VDE certification documents to support global compliance.