Black Rocker Switch ON-OFF DPST 4-Pin 21×15mm (0.8" x 0.6") KCD1 10A/125VAC 6A/250VAC — 2/5/10 Pack

💡 Overview

The KCD1 4-Pin DPST Rocker Switch is a compact, snap-in Double Pole Single Throw (DPST) On/Off switch designed for general-purpose power control applications. With its 4-pin configuration, this switch can simultaneously break two independent circuits with a single toggle — making it ideal for controlling both the positive and negative lines of a DC circuit, or switching a live line plus an indicator light. Its miniature 21×15mm form factor and snap-in mounting make it easy to install in control panels, enclosures, and DIY electronics projects.

⭐ Key Features

• DPST On/Off Operation – Switches two circuits simultaneously with a single toggle action
• Dual Voltage Rating – Rated for 6A at 250VAC and 10A at 125VAC
• Snap-In Panel Mounting – Installs quickly into a standard rectangular panel cutout (approx. 18×13mm)
• Compact Form Factor – Miniature 21×15mm body fits tight spaces and small enclosures
• 4.8mm Blade Terminals – Compatible with standard quick-connect spade connectors for solderless wiring
• Durable Construction – Rugged nylon housing with copper alloy contacts for reliable switching
• 2-Position Latching – Bistable On/Off positions with a satisfying tactile click

📋 Specifications

🔧 How It Works

The KCD1 is a DPST (Double Pole Single Throw) switch, which means it controls two separate circuits at the same time using a single rocker toggle. Think of it as two independent On/Off switches built into one compact body.

1. Off Position – Both internal circuits are open (disconnected). No current flows through either pair of pins.
2. On Position – Press the rocker to the "On" side. Both internal circuits close simultaneously, allowing current to flow through both pairs of pins.

The four pins are arranged as two pairs. Each pair acts as an independent switch contact:

• Pins 1 & 2 – First pole (Circuit A)
• Pins 3 & 4 – Second pole (Circuit B)

This makes the KCD1 4-pin switch especially useful when you need to break both the positive and negative lines of a DC circuit for complete isolation, or when you want to switch a load and an indicator LED together.

🎯 Typical Applications

• Power On/Off control for DIY electronics projects and enclosures
• Arduino and Raspberry Pi project power switches
• LED lighting control panels
• Small appliance and equipment power switches
• Automotive accessory switches (12V DC systems)
• Control panels and instrument enclosures
• Battery-powered device power management
• Dual-circuit switching (e.g., load + indicator light)

📌 Pin Configuration

📦 What's in the Box

• 2, 5, or 10× KCD1 4-Pin DPST Rocker Switch (KCD1-H-4P2D-10) (Quantity chose above)

⚠️ Important Notes

• This switch is rated for AC loads only at the specified ratings (6A/250VAC, 10A/125VAC). For DC applications, derate accordingly — DC arcing reduces the effective current rating.
• Ensure your panel cutout matches the required dimensions (~19×13mm) for proper snap-in fit.
• Use appropriately rated wire (at least 18 AWG for 10A applications) and proper spade connectors for the 4.8mm blade terminals.
• Do not exceed the rated voltage or current. Overloading the switch may cause overheating or failure.
• For high-vibration environments, consider securing wiring connections with heat-shrink over spade connectors.