Omron G7Z-4A-02Z-R DC24V Power Relay 4-Pole 20A High Capacity
SKU: G7Z-4A-02Z-R DC24VUSD 46.00
Omron G7Z-4A-02Z-R DC24V is a 4-pole power relay with 20A contacts, DC24V coil for high-current industrial switching applications.
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Product Overview
The G7Z-4A-02Z-R DC24V is built for robust switching duties where standard miniature relays are insufficient. Its multi-contact arrangement supports flexible control logic, interlock chains, and load-separation strategies in panel designs. Commonly used in machine power circuits and utility control sections, this relay is chosen for dependable long-term operation under demanding industrial conditions and repetitive switching cycles.
- SKU: G7Z-4A-02Z-R DC24V
- Series: G7Z
- Voltage: 250VAC
Best-Fit Applications
- Switching motors or auxiliary power branches in machine panels
- Implementing control interlocks with NO/NC logic combinations
- Driving high-load outputs from PLC relay interface circuits
- Managing heater or compressor enable circuits
- Upgrading contact reliability in older panel retrofit projects
- Building standardized contactor sections in OEM equipment
Buying Checklist
- Strong contact configuration flexibility for complex control logic
- 24VDC coil aligns with common industrial PLC control voltage
- Suitable for heavier loads than small signal relays
- Reliable option for repetitive switching environments
- Supports maintainable and standardized panel designs
Technical Specifications
| Model | G7Z-4A-02Z-R DC24V |
|---|---|
| Series | G7Z |
| Type | Power Relay |
| Contact Configuration | 4NO (4 Form A) |
| Coil Voltage | DC24V |
| Contact Rating | 20A at 250VAC, 20A at 30VDC |
| Max Switching Voltage | 250VAC, 125VDC |
| Inrush Current | 40A (tungsten lamp load) |
| Operating Time | 15ms max |
| Release Time | 10ms max |
| Mechanical Life | 5 million operations |
| Electrical Life | 50,000 operations (at 20A) |
| Terminal Type | Screw terminals (M4) |
| Mounting | Panel or DIN rail |
| LED Indicator | Yes |
| Operating Temperature | -40 to +70°C |
| Certifications | CE, UL, CSA, VDE |
Resources & Downloads
FAQ for G7Z-4A-02Z-R DC24V
What applications require 20A power relay?
High-current loads: large heaters (2-5kW), pump motors (1-3HP), compressor control, welding equipment, industrial furnaces, and high-power lighting circuits.
What wire size for 20A contacts?
Use minimum 12 AWG (4mm²) copper wire for 20A. For runs over 3 meters or high ambient, use 10 AWG (6mm²). Follow local electrical codes for wire sizing.
Do I need arc suppression for DC loads?
Yes, DC arcs are harder to extinguish than AC. For DC loads, add RC snubber across contacts or use DC-specific arc suppressor. Extends contact life significantly.
What's the difference between resistive and tungsten rating?
Resistive (20A): heaters, incandescent loads. Tungsten (40A inrush): cold filament lamps have 10-15x inrush current. G7Z handles 40A inrush for lamp switching applications.
Can I parallel contacts for higher current?
Yes, parallel all 4 poles for up to 60-70A (not 80A due to uneven current sharing). Ensure all poles switch simultaneously. Use for high-current DC applications.
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