RC 2-Channel PWM Relay Switch Receiver | 20A, 3 Modes, 4.8–8.4V

RC 2-Channel PWM Relay Switch Receiver — 3 Working Modes, 20A, 4.8–8.4V

Take full control of your RC aircraft, car, or model build with this compact and versatile 2-Channel PWM Relay Switch Receiver. Designed for hobbyists and RC enthusiasts, this electronic switch module lets you control two independent relay channels directly from your RC transmitter — no extra programming hardware needed. With three selectable working modes and a max switching current of 20A, it handles a wide range of accessories and onboard electronics with ease.

Key Features

• 2-Channel Relay Control: Independently switch K1 and K2 relay channels via PWM signal from your RC receiver.
• 3 Selectable Working Modes: Cycle through modes with a short press of the onboard mode button — your selected mode is retained even after power loss.
• Wide Voltage Compatibility: Operates on 4.8V–8.4V DC receiver power (NiMH and LiPo compatible).
• High Switching Capacity: Rated at 20A/14VDC and 20A/125VAC for robust accessory control.
• PWM Signal Input: Accepts standard 3–5V high-level PWM pulses (900–2100µs range) for universal RC receiver compatibility.
• LED Status Indicators: Blue LEDs clearly indicate relay state for each channel at a glance.
• Compact & Lightweight: Ideal for aircraft, RC cars, boats, and other space-constrained builds.

Wiring Guide

• Yellow Wire: PWM signal line (3–5V high-level PWM pulse width signal, 900–2100µs)
• Red Wire: Positive terminal of receiver power supply (4.8V–8.4V DC)
• Black Wire: Negative terminal of receiver power supply

3 Working Modes Explained

Mode 1 — Single Threshold Toggle

• Signal < 1650µs: Relays K1 & K2 de-energized (normally closed); blue LEDs off.
• Signal > 1650µs: Relays K1 & K2 energized (normally open connected); blue LEDs on.

Mode 2 — Dual Threshold, Independent Channels

• Signal < 1350µs: K1 closed (blue LED on), K2 open.
• 1350µs ≤ Signal < 1650µs: Both K1 and K2 open; both blue LEDs off.
• Signal > 1650µs: K2 closed (blue LED on), K1 open.

Mode 3 — Timed Flashing Output

• Signal < 1350µs: K1 flashes at 1-second on/off interval (blue LED flashes), K2 open.
• 1350µs ≤ Signal < 1650µs: Both K1 and K2 open; LEDs off.
• Signal > 1650µs: K2 flashes at 1-second on/off interval (blue LED flashes), K1 open.

Technical Specifications

Package Contents

• 1× 2-Channel PWM Relay Switch Receiver Module

Please Note: Due to lighting and display differences, the product color may vary slightly from images shown. Please allow 1mm–1cm tolerance due to manual measurement.

For general RC hobby safety guidelines and best practices when working with electronic components, visit the U.S. Consumer Product Safety Commission (CPSC).

Learn more: Relay

Frequently Asked Questions

Q: What RC receivers is this 2-channel PWM relay switch compatible with?

A: This relay switch is compatible with virtually any standard RC receiver that outputs a 3–5V high-level PWM signal in the 900–2100µs range. This covers most popular RC systems used for aircraft, cars, boats, and other models.

Q: Will my selected working mode be lost when I disconnect power?

A: No — the module features non-volatile mode memory. Whichever mode you select (Mode 1, 2, or 3) is retained even after power is disconnected, so you won't need to reconfigure it each time you power up your model.

Q: Can I use this relay switch with both NiMH and LiPo battery packs?

A: Yes. The wide input voltage range of 4.8V–8.4V DC makes it compatible with both 4-cell NiMH packs (typically around 4.8–6V) and 2S LiPo packs (up to ~8.4V fully charged), giving you flexibility across different RC power setups.

Q: What can I control with the relay outputs?

A: The relay outputs are rated at 20A/14V DC and 20A/125V AC, making them suitable for switching lights, motors, ESCs, retractable landing gear, smoke units, and other RC accessories that require remote on/off switching from your transmitter.