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Power Relays
G4A PCB Relay
Miniature Single-pole Relay with 80-A Surge Current and 20-A Switching Current
- Ideal for motor switching.
- Miniature, relay with high switching power and long endurance.
- Creepage distance conforms to UL and CSA standards.
- Highly noise-resistive insulation materials employed.
- Standard model available with flux protection construction.
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Updated March 23, 2009
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This web page provides an excerpt from a datasheet.
Refer to Datasheetand other applicable documents for more information.
Refer to Datasheetand other applicable documents for more information.
| #250 tab terminals/PCB coil terminals | SPST-NO | G4A-1A-E |
| PCB terminals/PCB coil terminals | G4A-1A-PE |
| Note: | When ordering, add the rated coil voltage to the model number. Example: G4A-1A-E 12VDC |
| Rated voltage | 5 VDC | 12 VDC | 24 VDC | |
|---|---|---|---|---|
| Rated current | 180 mA | 75 mA | 37.5 mA | |
| Coil resistance | 27.8 Ω | 160 Ω | 640 Ω | |
| Coil inductance (ref. value) |
Armature OFF | --- | 0.8 H | 3.5 H |
| Armature ON | --- | 1.1 H | 4.8 H | |
| Must operate voltage | 70% of rated voltage max. | |||
| Must release voltage | 10% of rated voltage min. | |||
| Max. permissible voltage | 160% of rated voltage at (23ºC) | |||
| Power consumption | Approx. 0.9 W | |||
| Note: | 1. | The rated current and coil resistance are measured at a coil temperature of 23ºC with a tolerance of ±10%. |
| 2. | Operating characteristics are measured at a coil temperature of 23ºC. | |
| 3. | Max. permissible voltage refers to the maximum value in a varying range of operating power voltage, not a continuous voltage. |
Contact Ratings
| Rated load | 20 A at 250 VAC |
|---|---|
| Rated carry current | 20 A |
| Max. switching voltage | 250 VAC |
| Max. switching current | 20 A |
| Max. switching power | 5,000 VA |
| Failure rate (reference value) | 100 mA at 5 VDC |
| Note: | P level: λ60 = 0.1 × 10-6/operation (with an operating frequency of 120 operations/min) |
Endurance
With Motor Load
| 250 VAC: Inrush current: 80 A, 0.3 s (cosφ= 0.7) Break current: 20 A (cosφ = 0.9) |
ON: 1.5 s OFF:1.5 s |
200,000 operations |
With Overload
| 250 VAC: Inrush current: 80 A (cosφ= 0.7) Break current: 80 A (cosφ = 0.7) |
ON: 1.5 s OFF:99 s |
1,500 operations |
With Inverter Load
| 100 VAC: Inrush current: 200 A (0-P) Break current: 20 A |
ON: 3 s OFF:5 s |
30,000 operations |
Characteristics
| Contact resistance | 100 mΩ max. | ||||||
|---|---|---|---|---|---|---|---|
| Operate time | 20 ms max. | ||||||
| Release time | 10 ms max. | ||||||
| Max. operating frequency | Mechanical: 18,000 operations/hr | ||||||
| Insulation resistance | 1,000 MΩ min. (at 500 VDC) | ||||||
| Dielectric strength | 4,500 VAC 50/60 Hz for 1 min between coil and contacts 1,000 VAC 50/60 Hz for 1 min between contacts of same polarity |
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| Vibration resistance |
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| Shock resistance | Destruction: 1,000 m/s2 Malfunction: 200 m/s2 |
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| Endurance |
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| Ambient temperature | Operating: -20ºC to 60ºC (with no icing) | ||||||
| Ambient humidity | Operating: 5% to 85% | ||||||
| Weight | Approx. 25 g |
G4A-1A-E  |
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| Mounting Holes (BOTTOM VIEW)  |
Terminal Arrangement / Internal Connections (Top View) (Bottom View)  |
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G4A-1A-PE  |
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| Mounting Holes (BOTTOM VIEW)  |
Terminal Arrangement / Internal Connections (BOTTOM VIEW)  |
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