Contactor,circuit breaker,solar inverter,electric meter,solar batteries
Model Code Definition
| Segment | Code | Meaning |
| G2R | – | Product series: General-purpose Power Relay |
| 0.5 | – | Contact pole: 1-pole SPDT (10A) / 2-pole DPDT (5A) |
| -S | – | Terminal type: Plug-in, matched with 8-pin socket |
| -N | – | Function: Built-in LED operation indicator |
| -D | – | Function: Built-in coil surge suppression diode (DC coil only) |
| -I | – | Function: With lockable test button, manual actuation for circuit inspection |
| (S) | – | Extra function: Standard mechanical indicator and nameplate for model & purpose marking |
| DC24/AC220 | – | Rated coil voltage, specify upon order; AC and DC cannot be mixed |
Mnemonic Rule: G2R series includes 1/2 poles. SNDI integrates LED, freewheeling diode and test button. (S) equips mechanical indicator and nameplate. Select correct AC/DC voltage.
- Core Specification Table (Model: G2R-2-SNDI DC24 (S))
| Category | Parameter | Remarks |
| Basic Specifications | ||
| Relay Type | Plug-in miniature power relay | Compliant with IEC 61810-1 |
| Contact Configuration | 2c DPDT / 1c SPDT | 8 pins for 2-pole, 5 pins for 1-pole |
| Rated Load | 2-pole: 5A @ 250VAC / 5A @ 30VDC | Resistive load; derate for inductive load |
| 1-pole: 10A @ 250VAC / 10A @ 30VDC | ||
| Inductive Load Capacity | 2-pole: 2A @ 250VAC / 0.5A @ 30VDC | Power factor 0.4, L/R=7ms |
| 1-pole: 7.5A @ 250VAC / 5A @ 30VDC | ||
| Max Switching Power | 2-pole: 2500VA(AC) / 300W(DC) | |
| 1-pole: 3000VA(AC) / 300W(DC) | ||
| Contact Resistance | ≤50mΩ (DC5V 1A voltage drop method) | Initial value |
| Coil Parameters (DC24V) | ||
| Rated Voltage | DC24V | Allowable fluctuation: ±10% |
| Rated Current | 21.6mA | |
| Coil Resistance | 1113Ω | Measured at 20°C |
| Coil Inductance | Approx. 3.6H | Reference value |
| Pick-up Voltage | ≤75% rated voltage (Max DC18V) | |
| Drop-out Voltage | ≥10% rated voltage (Min DC2.4V) | |
| Mechanical & Electrical Performance | ||
| Operating Time | ≤15ms (excluding contact bounce) | |
| Release Time | ≤20ms (diode built-in type) | Standard type ≤10ms |
| Max Operation Frequency | Mechanical: 18,000 cycles/hour | |
| Electrical: 1,800 cycles/hour under rated load | ||
| Insulation Resistance | ≥1000MΩ (DC500V megohmmeter) | Between coil and contact |
| Dielectric Strength | Coil to contact: 2000VAC 1min | 50/60Hz |
| Between contacts: 1000VAC 1min | ||
| Between coils: 500VAC 1min | ||
| Environmental & Physical Properties | ||
| Operating Temperature | -40°C ~ +70°C | Non-condensing |
| Storage Temperature | -40°C ~ +85°C | |
| Humidity | 35% ~ 85% RH | Non-condensing |
| Weight | Approx. 20g | |
| Mounting Type | Matched with P2RF series sockets, recommended P2RF-08-PU Push-In Plus socket | 60% wiring time saved |
| Test Button | Lockable type (lockable at ON position) | Circuit inspection without power supply |
- Full Model List SNDI Type (G2R-□-S (S) Series)
3.1 1-pole Models (G2R-1-SNDI (S))
| Model Prefix | Function Description | Optional Voltage | Order Example |
| G2R-1-SNDI | LED indicator + built-in diode + lockable test button | AC12/24/100/110/200/220V | G2R-1-SNDI DC24 (S) |
| DC6/12/24/48/100V | |||
| G2R-1-SNI | LED indicator + lockable test button (no diode) | Same as above | G2R-1-SNI AC220 (S) |
| G2R-1-SND | LED indicator + built-in diode (no test button) | Same as above | G2R-1-SND DC12 (S) |
| G2R-1-SN | Only LED indicator | Same as above | G2R-1-SN AC110 (S) |
| G2R-1-S | Standard type (no LED/diode/test button) | Same as above | G2R-1-S DC48 (S) |
3.2 2-pole Models (G2R-2-SNDI (S))
| Model Prefix | Function Description | Optional Voltage | Order Example |
| G2R-2-SNDI | LED indicator + built-in diode + lockable test button | AC12/24/100/110/200/220V | G2R-2-SNDI DC24 (S) |
| DC6/12/24/48/100V | |||
| G2R-2-SNI | LED indicator + lockable test button (no diode) | Same as above | G2R-2-SNI AC220 (S) |
| G2R-2-SND | LED indicator + built-in diode (no test button) | Same as above | G2R-2-SND DC12 (S) |
| G2R-2-SN | Only LED indicator | Same as above | G2R-2-SN AC110 (S) |
| G2R-2-S | Standard type (no LED/diode/test button) | Same as above | G2R-2-S DC48 (S) |
3.3 Special Models
| Model | Special Function | Application |
| G2R-2-SNDI-AP3 | AP3 certified, compliant with UL508 | Industrial control for North America |
| G2R-1-SNDI-G | Gold-plated contact | Low-level signal switching ≤100mA |
- Cross-brand Replacement List
| Omron Model | Alternative Brand | Replacement Model | Main Difference |
| G2R-2-SNDI DC24 (S) | Schneider | RXM2AB2BD + test button accessory | Extra test button needed, similar price |
| Siemens | 3RT1015-1BB42 + locking test unit | Larger dimension, different contact material | |
| ABB | CR-MX024DC2L + test module | Identical mounting, higher price | |
| Weidmüller | DRM57024 + manual test switch | Different terminal design, external test function | |
| Domestic brand | YHRJ2S-CL DC24V + test button | Cost-effective, consistent performance, optional test button | |
| G2R-1-SNDI DC24 (S) | Schneider | RXM4AB2BD + test accessory | 10A 1-pole capacity, extra test part required |
| Siemens | 3RT1016-1BB42 + test device | 12A 1-pole capacity, complete test function |
Selection Suggestion: Prioritize Omron for integrated design. Choose domestic alternatives for cost control. Match original brand for system compatibility.
- Common Faults & Solutions
| Fault Phenomenon | Possible Causes | Solutions |
| Coil burnout | 1. Mixed AC/DC voltage | 1. Verify AC/DC marking |
| 2. Voltage exceeds 卤10% rated value | 2. Keep voltage within rated range | |
| 3. Reversed DC coil polarity | 3. Wire per +/- terminal marking | |
| No contact actuation after power-on | 1. Test button locked at ON | 1. Switch test button to OFF |
| 2. Voltage lower than 75% rated value | 2. Raise voltage over 80% rated value | |
| 3. Mechanical jam & unreset button | 3. Confirm full reset of test button | |
| No response in manual test | 1. Damaged test button | 1. Replace relay |
| 2. Mechanical blockage | 2. Check mounting and socket tightness | |
| 3. Contact welding | 3. Replace relay and inspect overload | |
| LED off while relay operates | 1. Broken LED | 1. Replace relay |
| 2. Burnt current-limiting resistor | 2. Check circuit overcurrent | |
| 3. Reversed DC polarity | 3. Correct coil wiring polarity | |
| Failure to reset after power cut | 1. Locked ON test button | 1. Reset test button |
| 2. Residual coil voltage | 2. Add discharge circuit or replace coil | |
| 3. Contact welding | 3. Replace relay and check load type |
Precautions: Reset test button properly. Do not mix AC and DC. Correct polarity wiring. Add absorption circuit for inductive load. Do not exceed rated current.
- Air Freight Compliance & Certifications
6.1 Air Freight Compliance
| Item | Status | Description |
| Built-in lithium battery/supercapacitor | None | Electromagnetic relay without energy storage components |
| Magnetic property | Weak magnetism | Compliant with IATA DGR Class 9 unrestricted goods |
| Shipping category | General cargo | No UN number required |
| Packaging | Standard anti-static package | Avoid impact to prevent component damage |
6.2 Certifications
| Certificate | Standard | Compliance Status |
| CE | LVD 2014/35/EU + EMC 2014/30/EU | Compliant |
| RoHS | RoHS 2.0 10-substance restriction | Lead & cadmium free eco-design |
| UL | UL508 Industrial Control Equipment | Optional for partial models (-AP3 suffix) |
| CSA | C22.2 No.14 Canadian Standard | Synchronized with UL certification |
| IEC | IEC 61810-1 General Relay Standard | Compliant |
Export Notice: Provide CE & RoHS documents for EU market. Select UL/CSA certified models with -AP3 suffix for North America.
- Application Cases & Industry Matching
7.1 Typical Application Scenarios
| Industry | Application | Selection Key Points |
| Industrial Automation | PLC output expansion, drive solenoid valves, small motors, contactor coils | DC24V G2R-2-SNDI(S) with P2RF-08-PU socket for convenient circuit test |
| Building Automation | HVAC control, fan & water pump startup, lighting control | AC220V G2R-1-SNDI(S), mechanical indicator for on-site maintenance |
| Equipment Manufacturing | Signal switching for test, medical and semiconductor devices | DC12V G2R-1-SNDI-G(S) gold-plated contact for reliable low-level signal |
| Energy Industry | Control loop of solar inverter & UPS | DC48V G2R-2-SNDI(S), built-in diode for surge suppression |
| Rail Transit | Auxiliary vehicle system, door & air conditioning control | DC24V G2R-1-SNDI(S), shock resistance, easy maintenance test |
7.2 Case Analysis
Case Title: PLC Control Circuit Test Optimization for Auto Parts Production Line
Demand: Frequent fault inspection; traditional powered test is inefficient and risky
Selection: G2R-2-SNDI DC24 (S) + P2RF-08-PU Push-In Plus Socket
Effect:
- Lockable test button realizes manual actuation without power, 30% efficiency improved
- Dual LED & mechanical indicator reduces misjudgment
- Built-in diode suppresses back EMF and protects PLC modules
- Push-In Plus socket cuts wiring time by 60% and lowers installation cost
- Nameplate marking facilitates circuit management
- Selection Rules & Summary
Selection Tips
- Choose poles by load: 1-pole 10A for heavy load, 2-pole 5A for dual circuit
- Identify functions by suffix: Integrated LED, diode and test button; (S) with mechanical indicator
- Confirm voltage: No AC-DC interchange, pay attention to DC polarity
- Match P2RF socket series to save wiring labor
- Lockable test button enables offline circuit inspection
Core Advantages
All-in-one design with complete indicators and test functions
Easy installation and remarkable wiring efficiency improvement
Convenient offline fault diagnosis
Effective surge protection prolongs service life
Eco-friendly wide temperature range from -40°C to +70°C
