Rocker Switch DPST 30A 250VAC Waterproof KCD4 4-Pin Black Spray Finish Rocker Switch ON-OFF FILN

Rocker Switch Drawing

What is a Rocker Switch DPST?

A rocker switch DPST (Double Pole Single Throw) is an electromechanical component that controls two separate circuits simultaneously with a single "rocking" motion. By toggling the actuator, the internal mechanism either connects or disconnects two independent line inputs to their respective outputs. The rocker switch DPST is a standard in industrial power management because it can safely disconnect both the hot and neutral lines in AC applications, providing enhanced electrical safety and complete circuit isolation.

Product Overview

The FILN FL3-KCD4-0323-21 is a high-performance rocker switch DPST designed for heavy-duty industrial and consumer electronics. Featuring a 30x22mm mounting hole and IP65 waterproof protection, this KCD4 rocker switch handles up to 30A at 250VAC. Certified by UL, CE, VDE, RoHS, and SGS, it ensures global compliance for machinery, household appliances, and marine equipment. The 4-pin configuration allows for illuminated LED feedback in Red, Green, Yellow, Blue, or White, ensuring operational visibility in dark environments. Whether used in high-current industrial control cabinets or outdoor power tools, this waterproof 4 pin rocker switch provides a long electrical life and robust mechanical reliability.

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Quick Specifications

Model Number	FL3-KCD4-0323-21
Mounting Hole Size	30mm x 22mm (1.18" x 0.87")
Switch Function	DPST ON-OFF (Multiple Options Available)
Illumination Type	LED (R/G/Y/B/W) or Non-Illuminated
Actuator Shape	Rectangular / Square Body
Terminal Type	4-Pin Spade Terminals (Quick Connect)

Performance Parameters

Technical Parameter	Specifications
Rated Voltage	30A 250VAC / 18(12)A 125VAC
Initial Contact Resistance	≤ 50mΩ
Insulation Resistance	≥ 100mΩ / 500VDC
Dielectric Strength	1500VAC / 5mA 60s
Electrical Endurance	10,000 Cycles
Ambient Temperature	-40°C to +125°C (40T125)
Protection Degree	IP65 / IP66 Waterproof
Certifications	UL, CE, VDE, RoHS, SGS, ISO9001

Component Materials

Accessories Name	Material
Transparent Sheet / Light Guide	Polycarbonate (PC)
Holder / Up Base	ABS
Waterproof Cover / Washer	Rubber
Bottom Base	PA66 (Nylon 66)
Pins / Spring Board	Brass H62
Contact Material	Silver Cadmium Oxide (AgCdO12)
Spring	72# Spring Steel
Internal Light Source	High-Brightness LED

Technical Installation Standards

Operating Temp	-40°C to +125°C	Terminal Strength	80N Static Load (60s)
Relative Humidity	45% to 85%	Solderability	235±5°C, 3±0.5s
Mechanical Life	20,000 Operations	Electrical Life	10,000 Operations

Technical Advantages of the 30A High-Current Rocker Switch

The FILN 30A High-Current Rocker Switch has been meticulously engineered for high-power loads and extreme durability. Below is a detailed technical comparison highlighting the superior features of our upgraded model:

Core Component	Upgrade Description	Performance Benefit
Housing Structure	Split Black Housing Design	Superior structural stability and enhanced sealing.
Waterproof Design	Optimized Frame Surface	Fits panels more securely, improving waterproof ratings.
Illumination	Premium LED Lamp	Longer lifespan and more uniform illumination.
Contact Material	Silver Contacts + 1mm Brass	Rated for true 30A loads; higher endurance.
Inner Holder	New Larger Contact Holder	Reduces heat generation during operation.
Material Grade	Imported PA Nylon	High-strength flame retardancy.

Application & Selection Guide

To ensure the safety and longevity of your equipment, we recommend the 30A Upgraded Model for heavy-duty applications such as:

Industrial Control Panels | Outdoor Portable Power Stations | Marine Systems | High-Performance Automotive Modifications

Framed vs. Frameless Rocker Switches

FILN’s KCD4 rocker switch series offers two distinct structural designs to meet different installation aesthetics and mechanical requirements:

• Enhanced Framed Series: Features an internal high-strength white frame (exoskeleton). This design provides superior structural rigidity, protecting the switch from deformation.
• Classic Frameless Series: A minimalist, compact design ideal for high-density panel layouts. It offers the same electrical performance at a more cost-effective price point.

Rocker Switch Function Differences

Function Code	Description	Operation Type
ON-OFF	Standard power control; circuit is either closed or open.	Latching
ON-ON	Alternates power between two different circuits.	Latching
(ON)-OFF	Normally open; circuit only closes while the button is pressed.	Momentary

Industrial & Commercial Applications

The KCD4 30x22mm rocker switch is ubiquitous across various sectors due to its 30A high-current capacity and IP65 waterproof rating:

• Household Appliances: Coffee machines, air fryers, and water dispensers.
• Medical Equipment: Power management for centrifuges and diagnostic machines.
• Automotive & Marine: Dashboard controls in RVs, ships, and heavy-duty vehicles.
• Industrial Machinery: Control panels for conveyors and PDUs.

Installation Guide & Steps

1. Panel Cutout: Prepare a rectangular opening measuring exactly 30mm x 22mm.
2. Orientation: Align the rocker switch with the opening.
3. Snap-In Mounting: Push the switch firmly through the panel.
4. Wiring: Connect your 4-pin female spade connectors to the terminals.

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 a Rocker Switch Works

A rocker switch functions on a seesaw principle. In a DPST rocker switch, two separate sets of bridges move in unison. This allows the user to break both the live and neutral wires simultaneously, which is an essential safety feature for industrial equipment. The mechanical life is governed by the quality of the 72# spring and the AgCdO12 silver contacts.

FILN Factory Direct Supply

FILN is a premier manufacturer of industrial switches with zero MOQ and rapid global shipping:

• No Minimum Order Quantity
• Voltage Customization (5V-220V)
• Wire Length Customization
• Fast Global Logistics
• Full CE / RoHS / UL Certification

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Frequently Asked Questions

1. What is the mounting size of the 4-pin KCD4 rocker switch?
The standard mounting cutout is 30mm x 22mm.

2. How do you wire a 4-pin illuminated rocker switch?
For dependent lighting, connect power input to the bottom terminals and the load to the top terminals.

3. Is this 30A rocker switch waterproof for outdoor use?
Yes, this model features an IP65/IP66 rated waterproof rubber cover.

4. What is the maximum amperage for a DPST rocker switch?
The FILN KCD4 series is rated for high-current applications up to 30A 250VAC.

5. Can I get a custom LED color?
Yes, FILN offers Red, Green, Yellow, Blue, and White LED options.

6. What certifications does the FILN rocker switch have?
Our switches are certified by UL, CE, VDE, RoHS, and SGS to ensure safety and international compliance.

7. Does a 4-pin rocker switch act as a DPST?
Typically, yes. A 4-pin rocker switch usually functions as a Double Pole Single Throw (DPST) switch, controlling two circuits at once.

8. What is the benefit of a black painted surface with an internal frame?
The black painted surface offers a versatile aesthetic, while the internal frame adds structural rigidity to prevent deformation during installation.

9. How long is the electrical lifespan of these switches?
The electrical endurance is rated at 10,000 cycles at full rated load, ensuring years of reliable operation.

10. What is the difference between latching and momentary rocker switches?
Latching switches (like ON-OFF) stay in position when pressed, while momentary switches (like (ON)-OFF) spring back to their original position once released.