Omron G2R-2 Miniature Relay

The Omron G2R-2 is a general-purpose small power relay featuring a Double-Pole Double-Throw (DPDT) contact configuration, suitable for a wide range of control scenarios. Below is a summary of its core information:

 I. Core Specifications and Features

1. Contact Performance

- **Rating**: AC250V/5A (resistive load) or DC30V/5A; supports inductive loads (e.g., AC250V/2A, cosφ=0.4).

- **Material**: Silver (Ag) alloy contacts with cadmium-free, environmentally friendly design, ensuring high reliability and long service life.

- **Insulation**: Withstands 5,000V between coil and contacts, and 10,000V surge voltage, complying with safety standards.

2. Coil Parameters

- **Voltage Range**: Multiple options available, including DC5V, 12V, 24V, 48V, 100V, or AC12V, 24V, 100V, 200V.

- **Power Consumption**: Approximately 0.53W for DC type, and 0.9VA (at 60Hz) for AC type.

- **Operating Characteristics**: For DC coils, the pick-up voltage is ≤70% of the rated value, and the drop-out voltage is ≥15% of the rated value; for AC coils, the pick-up voltage is ≤80% of the rated value, and the drop-out voltage is ≥30% of the rated value.

3. Physical Design

- **Dimensions**: Approximately 29mm×13mm×29mm, weighing 20g, with a compact size.

- **Mounting**: Plug-in terminals (e.g., P2RFZ-08E socket), supporting PCB or DIN rail mounting, reducing wiring time by 60%.

- **Environment**: Operating temperature ranges from -40℃ to 70℃, humidity from 5% to 85%; resistant to vibration (10-55Hz) and shock (1,000m/s²).

 II. Model Selection and Functional Differences

The suffix letters of G2R-2 represent different functional configurations:

- **-S**: Standard type, no additional functions.

- **-SN**: Built-in operation indicator light (LED), supporting circuit status monitoring.

- **-SD**: Built-in freewheeling diode, protecting the circuit from back EMF (electromotive force) impact, suitable for inductive loads.

- **-SND**: Integrates both LED indicator light and diode, ideal for scenarios requiring status feedback and protection.

- **(S)**: Equipped with a mechanical operation lever, facilitating manual circuit testing.

For example, **G2R-2-SN DC24** refers to a DPDT relay with a DC24V coil and built-in LED indicator; **G2R-2-SD AC120** is a model with an AC120V coil and built-in diode.

III. Application Scenarios

1. Industrial Automation

- Controls actuators such as motors, solenoid valves, and contactors, supporting PLC system linkage.

- Typical cases: Signal switching for assembly line equipment, sensor-triggered logic control.

2. Smart Home and Consumer Electronics

- Drives smart switches, curtain motors, and security devices, compatible with development boards like Arduino and ESP32.

- Example: When remotely controlling home appliances via a voice assistant, the G2R-2 can act as a bridge between low-voltage signals and high-voltage loads.

3. New Energy and Power Systems

- Used for battery charge-discharge management and circuit switching of energy storage equipment, meeting high-reliability requirements.

- Example: Controls the on-off of charging circuits in electric vehicle charging piles.

4. Medical and Transportation Equipment

- Enables precise control of medical instruments (e.g., infusion pumps) and status switching of traffic signals.

 IV. Installation and Accessories

1. Sockets and Terminals

- It is recommended to use Push-In Plus sockets such as **P2RFZ-08E**, which support quick wiring and reduce installation time by 60%.

- Matching terminal covers (P2CZ-C) and jumper bars (PYDN series) can enhance safety and flexibility.

2. Precautions

- AC/DC coils are distinguished by tape color (e.g., blue for DC, white for AC) to avoid incorrect connection.

- During installation, ensure that the contact load does not exceed the rated value; for inductive loads, a diode or RC snubber circuit must be used in conjunction.

V. Procurement and Alternative Solutions

1. Supply and Price

- In the U.S. market, it can be purchased via WhatsApp: 0086-13811255435. For example, the spot price of **G2R-2-S DC12(S)** is approximately 11.71 US dollars.

- Some models (e.g., G2R-2-SNI) have been discontinued; it is recommended to prioritize **G2R-2-S** or **G2RL-2A** as alternatives.

2. Certification and Compliance

- Complies with international certifications such as UL, CSA, and IEC, suitable for global markets.

- Environmentally friendly design, free of hazardous substances like cadmium and lead.

 VI. Selection Recommendations

- **Basic Control**: Choose the standard **G2R-2-S** model for high cost-effectiveness.

- **Status Monitoring**: Select models with the **-SN** suffix (e.g., G2R-2-SN DC24) when an LED indicator is required.

- **Inductive Loads**: Prioritize models with the **-SD** or **-SND** suffix, which have built-in diode protection circuits.

- **Manual Testing**: Models with the **(S)** suffix (e.g., G2R-2-S DC12(S)) facilitate on-site debugging.