G3MB-202P 2A 5VDC 240VAC 4Pin Solid State Relay

G3MB-202P Solid State Relay (SSR) is a compact, reliable switching solution, perfect for interfacing low-voltage DC control circuits, like those found in microcontrollers, with higher voltage AC loads. As a true Solid State Relay, it utilizes semiconductor components instead of mechanical contacts, enabling silent, high-speed, and wear-free switching. This particular model, rated for a 5V DC control signal and capable of switching 2A at 240V AC, offers excellent isolation and longevity, making it an ideal component for applications requiring frequent, noise-free operation in automation and appliance control.

Key Features:

• Zero-Crossing Functionality: This feature ensures the load switches ON or OFF only when the AC voltage is near zero, significantly reducing electromagnetic interference (EMI) and current surges.
• High Isolation: An internal photocoupler provides excellent optical isolation between the 5V DC control side and the 240V AC load side, protecting sensitive electronics.
• Solid-State Reliability: With no moving parts, the G3MB-202P offers silent operation, extremely long life, and high resistance to shock and vibration.
• Low Control Voltage: The device directly interfaces with 5V microcontrollers like Arduino, Raspberry Pi, and PIC without requiring additional drive circuitry.
• Miniature Package: The compact, 4-pin single-in-line package (SIP) saves significant space on printed circuit boards (PCBs).

Technical Specifications:

• Load Voltage Range: 75 V AC to 264 V AC
• Rated Load Current: 2 A (RMS)
• Control Voltage Range: 4 V DC to 6 V DC (Nominal 5V DC)
• Input Control Current: ≈ 10 mA at 5V DC
• Zero-Cross Function: Yes (The G3MB-202P indicates Zero-Cross capability)
• Turn-On Time: ≤ 10 ms
• Dielectric Strength (Isolation): 2,500 V AC (between input and output)

Mechanical Specifications:

• Package Style: Miniature, 4-Pin Single-In-Line Package (SIP)
• Mounting: Through-Hole (PCB Mount)
• Operating Temperature Range: −30°C to +80°C
• Insulation Resistance: ≥ 100 MΩ (at 500V DC)
• Weight: ≈ 2.5 g

Dimensions:

• Length: ≈ 25.0 mm
• Width (Body): ≈ 21.0 mm
• Height: ≈ 12.0 mm
• Pin Pitch: ≈ 7.62 mm (Standard for SIP)

Pinout and Wiring:

• Pin 1 (Input +): Connect this pin to the positive terminal of the 5V DC control signal (V_CC).
• Pin 2 (Input −): Connect this pin to the negative terminal of the 5V DC control signal (GND).
• Pin 3 (Load Output): Connect one side of the AC load (e.g., AC motor or light) to this pin.
• Pin 4 (Load Output): Connect the other side of the AC line (Neutral or Live) to this pin.
• Wiring Note: You must wire the load pins (3 and 4) in series with the AC load. The SSR acts as an optically isolated switch for the AC circuit, controlled by the DC input.

Datasheet Reference:

• Download Omron G3MB Series Datasheet

Commonly Used in:

• Hobbyist Robotics: Interfacing low-power microcontrollers with simple AC devices.
• Industrial Control: Switching small solenoid valves, indicator lamps, or low-power AC contactors.
• Temperature Control: Driving heating elements or fans in simple PID control loops where quiet, rapid cycling is necessary.

Applications:

• AC Light Dimming/Switching: Provides silent, flicker-free on/off control for compatible AC lighting fixtures.
• Home Automation: Enabling remote, electronic switching of household appliances and pumps from a low-voltage smart control system.
• Security Systems: Driving low-power sirens or strobe lights with a robust, highly reliable electronic interface.

Equivalent Models:

• OMRON G3MC-201PL: A similar Omron miniature SSR, though typically with a slightly lower load current rating or different features like non-zero cross switching.
• FOTEK SSR-2DA: Often referenced as a generic alternative, though usually found in a larger, panel-mount package style.
• Various Microchip SSRs: Other manufacturers offer pin-compatible or functionally similar SSRs, but you must verify the control voltage (5V DC) and load specifications (2A, 240V AC).

Package Includes:

• 1 x G3MB-202P Solid State Relay (5V DC / 2A 240V AC)