S1203 12mm 2 Pin OFF-ON Metal Key Lock Switch

S1203 12mm 2 Pin OFF-ON Metal Key Lock Switch provides a crucial layer of security and controlled access for electrical equipment and systems. This robust mechanical switch features a simple SPST (Single Pole, Single Throw) configuration, allowing users to safely switch power ON or OFF using a dedicated key. Consequently, this design prevents unauthorized operation of machinery, control panels, or battery-powered devices. Constructed with durable metal, the S1203 is designed for panel mounting with a standard 12mm cutout, ensuring long operational life and resistance to tampering and environmental wear. Therefore, implement this key lock switch when your project requires both reliability and restricted user access to the power circuit.

Key Features:

• Key-Controlled Access: Requires a physical key for operation, providing a security measure against unauthorized use of equipment.
• Simple Switching Function: The switch utilizes a basic 2-position (OFF-ON) mechanism, functioning as a security-enhanced power toggle.
• Durable Construction: Features a robust zinc alloy body and chrome-plated bezel, offering excellent resistance to corrosion and physical impact.
• SPST Configuration: Employs a Single Pole, Single Throw (2-pin) circuit, simplifying installation into basic power control lines.
• Panel Mount Design: The compact 12mm diameter threaded barrel ensures easy and secure mounting into equipment panels.

Technical Specifications:

• Switch Type: Key Lock Switch
• Contact Configuration: SPST (Single Pole, Single Throw)
• Number of Positions: 2 Positions (OFF – ON, 90° rotation)
• Key Withdrawal Position: Key removable only in the OFF position (typically).
• Current Rating: 3 A @ 125 V_AC / 1 A @ 250 V_AC (Resistive Load)
• Contact Resistance: Maximum 50 mΩ (Initial)
• Insulation Resistance: Minimum 100 MΩ @ 500 V_DC
• Dielectric Strength: 1500 V_AC for 1 minute

Mechanical Specifications:

• Material (Housing): Zinc Alloy / ABS Plastic
• Termination Style: Solder Lugs (2 pins)
• Mechanical Life: ≥ 10,000 cycles
• Key Style: Flat type, reversible
• Operation: Maintain/Latching (Switch stays in the selected position until physically changed)

Dimensions:

• Mounting Hole Diameter: 12 mm (≈ 0.47 in)
• Panel Thickness (Max): ≈ 4 mm
• Body Length (Behind Panel): ≈ 15 mm (Excluding pins)
• Key Length (Exposed): ≈ 18 mm
• Pin Spacing: ≈ 5 mm

Pinout and Wiring:

• Pin 1 (Common): Connect this terminal to the input power source (e.g., V+ or the hot line of an AC source).
• Pin 2 (Output): Connect this terminal to the load or the downstream circuit that requires controlled power.
• Wiring Note: The switch completes the circuit between Pin 1 and Pin 2 when the key is turned to the ON position. Furthermore, ensure you observe the maximum current rating to prevent switch failure.

Datasheet Reference:

• Download S1203 12mm Key Lock Switch Datasheet

Commonly Used in:

• Control Panels: Providing secure power control for industrial machinery and testing equipment.
• Vending Machines: Used to switch power to service modes or enable/disable payment systems.
• Battery-Powered Devices: Implementing a secure master power switch on electric bikes, scooters, or portable generators.

Applications:

• Security Power Isolation: Securing the power supply to alarms, servers, or critical networking equipment.
• Mode Selection: Controlling access to different operational modes on diagnostic or specialized equipment.
• Tamper Prevention: Acting as an ignition switch for custom vehicles or unauthorized movement prevention systems.

Equivalent Models:

• KN-1203: A similar 12mm 2-position key switch often used interchangeably for basic ON/OFF functions.
• R12-T: Another common key switch series in the 12mm category, providing equivalent SPST key security.
• HS-1203: In short, this model offers identical electrical and mechanical specifications, making it a direct functional equivalent.

Package Includes:

• 1 x S1203 12mm 2 Pin OFF-ON Metal Key Lock Switch
• 2 x Corresponding Keys (Matching the lock code)
• 1 x Mounting Nut and Washer Set