Capacitive DC 3-30V Self Setting 3A LED Touch Key Switch Module

Capacitive DC 3-30V Self Setting 3A LED Touch Key Switch Module is a versatile, high-current solid-state touch controller designed to upgrade conventional mechanical switches in low-voltage DC applications. This compact module operates seamlessly across a wide voltage range from 3 V DC to 30 V DC, allowing direct control over LED light strips, small motors, and automotive DC loads. Consequently, it delivers instant touch-sensitive responsiveness through non-metallic barriers such as glass, acrylic, plastic, and wood up to several millimeters thick. Furthermore, onboard solder jumper pads allow users to customize the output behavior between momentary (jog) and self-locking (latching) modes to match specific circuit requirements. Therefore, you can easily integrate this self-setting capacitive sensor into custom ambient lighting, smart furniture, automotive retrofits, and DIY home automation controllers.

Key Features:

• Wide Operating Range: Operates reliably between 3 V DC and 30 V DC, making it suitable for 5V, 12V, and 24V DC systems.
• High Current Capacity: Drives up to 3 A of continuous output current, allowing direct switching of high-density LED light strips without requiring an external relay.
• Configurable Working Modes: Features onboard jumper pads to select between momentary (jog) and self-locking (latching/bistable) modes.
• Penetrative Touch Sensing: Detects capacitive touch through non-conductive materials like acrylic, wood, and glass up to ≈ 3 mm to 5 mm thick.
• Integrated LED Indicator: Incorporates an onboard status LED to provide clear visual feedback during active switching states.

Technical Specifications:

• Input Voltage Range: 3 V DC to 30 V DC
• Maximum Continuous Current: 3 A
• Quiescent Current: ≈ 2 mA to 5 mA (idle state)
• Sensing Mechanism: Single-channel capacitive touch sensing
• Sensing Distance: Up to ≈ 5 mm (dependent on panel dielectric constant and material thickness)
• Output Type: High-side DC voltage output (V_OUT equals V_IN when active)
• Operating Temperature Range: -20 °C to +70 °C

Mechanical Specifications:

• Board Material: High-grade FR-4 double-sided glass fiber PCB
• Mounting Style: Surface-mount pad pattern with soldering points for lead wires
• Substrate Thickness: 1.6 mm standard PCB thickness
• Sensing Pad Area: Circular onboard capacitive copper trace for optimal sensitivity

Dimensions:

• Module Length: ≈ 20 mm
• Module Width: ≈ 15 mm
• Module Height: ≈ 3.2 mm
• Total Weight: ≈ 1.8 g

Pinout and Wiring:

• V+ (Input Power Positive): Connect to the positive terminal of the DC power supply (3 V DC to 30 V DC).
• V- (Input Power Ground): Connect to the common ground terminal of the DC power supply.
• LED+ / OUT+ (Load Output Positive): Connect to the positive power wire of your LED strip or DC load.
• LED- / OUT- (Load Output Negative): Connect to the negative power wire of your LED strip or DC load (internally tied to common ground).
• Mode Setting Jumpers (A/B Pads): Configure the output behavior by shorting or opening solder pads. Specifically, leave open for momentary mode or short designated pads for latching mode.

Datasheet Reference:

• Download Capacitive Touch Controller IC Datasheet Reference

Commonly Used in:

• Smart Furniture: Concealed capacitive touch controls installed beneath wooden desk surfaces, cabinets, and nightstands.
• Architectural Lighting: Wall-mounted mirror touch switches, vanity lighting controls, and ambient display cabinet accent lights.
• Automotive Electronics: Custom interior cabin lighting switches, glovebox illumination triggers, and 12V auxiliary accessory toggles.

Applications:

• LED Light Strip Control: Switching 12V or 24V COB/SMD LED strips directly without mechanical wear and tear.
• Touch-Activated Enclosures: Waterproofing electronic enclosures by placing the touch button completely behind a sealed plastic or acrylic window.
• Microcontroller Signal Triggering: Interfacing with microcontrollers such as Arduino or ESP32 by stepping down the output signal.

Equivalent Models:

• TTP223 Single Key Touch Module: Low-power capacitive touch module with logic-level output, however it requires an external MOSFET for high-current driving.
• OE-TP Capacitive Touch Dimmer Module: Integrated 10A DC 5-12V touch dimming and switching module for single-color LED lighting.
• SGL8022W Touch Switch Module: Single-channel capacitive touch chip module supporting dimming and high-side power switching.

Package Includes:

• 1 x Capacitive DC 3-30V Self Setting 3A LED Touch Key Switch Module