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Technical specifications, features, applications and purchasing information.
| Brand | Omron |
| Model Number | G3NA-240B |
| Product Category | Single-Phase Solid State Relay (SSR) |
| Product Series | G3NA |
| Rated Load Current | 40 A |
| Rated Load Voltage | 24 to 240 VAC |
| Load Voltage Range | 19 to 264 VAC |
| Load Current with Heat Sink | 0.1 to 40 A at 40°C |
| Load Current without Heat Sink | 0.1 to 6 A at 40°C |
| Input Control Voltage Options | 5 to 24 VDC / 100 to 120 VAC / 200 to 240 VAC, depending on input version |
| DC Input Operating Voltage | 4 to 32 VDC |
| AC Input Operating Voltage | 75 to 132 VAC or 150 to 264 VAC, depending on input version |
| Input Isolation | Phototriac for DC input version; Photocoupler for AC input versions |
| Switching Function | Zero-Cross Switching |
| Terminal Configuration | Screw Terminals |
| Mounting Method | Screw Mounting |
| Maximum Inrush Current | 440 A (60 Hz, 1 Cycle) |
| Output ON-State Voltage Drop | 1.6 V RMS Maximum |
| Leakage Current | 5 mA Maximum at 100 VAC; 10 mA Maximum at 200 VAC |
| Insulation Resistance | 100 MΩ Minimum at 500 VDC |
| Dielectric Strength | 2500 VAC, 50/60 Hz for 1 Minute |
| Operating Temperature | -30°C to 80°C (No Icing or Condensation) |
| Storage Temperature | -30°C to 100°C (No Icing or Condensation) |
| Operating Humidity | 45% to 85% RH |
| Built-in Surge Protection | Varistor for Absorbing External Surges |
| Operation Indicator | Equipped |
| Protective Cover | Equipped |
| Recommended Heat Sink | Y92B-N150 or Y92B-A150N |
The Omron G3NA-240B is a single-phase solid state relay with a rated load current of 40 A. It is designed for AC load switching in industrial control equipment, electrical panels and heating systems. The maximum 40 A load rating requires an appropriate heat sink and suitable thermal conditions.
The relay supports a rated load voltage of 24 to 240 VAC, with an operating load voltage range of 19 to 264 VAC. This range supports compatible single-phase AC control applications in industrial machinery and electrical equipment.
The G3NA-240B incorporates a zero-cross function for AC output switching. This function switches the output near the AC voltage zero-crossing point, helping reduce electrical noise and switching disturbances in compatible AC load applications.
The G3NA-240B family is available with different control input versions, including 5 to 24 VDC, 100 to 120 VAC and 200 to 240 VAC. The DC-input version uses phototriac isolation, while the AC-input versions use photocoupler isolation. Confirm the complete input variant before ordering.
A built-in varistor helps absorb external voltage surges and supports protection of the relay against transient disturbances. This feature is useful in industrial electrical installations where switching operations and inductive loads may generate voltage transients.
The relay includes an operation indicator and protective cover. With a suitable heat sink, the rated load current reaches 40 A at 40°C. Without a heat sink, the specified load current is limited to 6 A at 40°C. Proper thermal design and load-current derating are essential for reliable operation.
We support online purchase of the Omron G3NA-240B Solid State Relay. For bulk purchasing or inquiries about other Omron control components, please contact our team with your requirements. We can provide information regarding quantity quotations, delivery arrangements and transportation methods. Before ordering, confirm the complete input control voltage version, rated load current, AC load voltage and required heat sink configuration to ensure compatibility with your equipment.
What is the Omron G3NA-240B?
The Omron G3NA-240B is a single-phase AC-output solid state relay designed for industrial load switching. It has a rated load current of 40 A and a rated load voltage range of 24 to 240 VAC.
What is the maximum load current?
The rated load current is 40 A at 40°C when used with an appropriate heat sink. Without a heat sink, the specified maximum load current is 6 A at 40°C. Actual allowable current also depends on ambient temperature and thermal installation conditions.
What is the load voltage range?
The rated load voltage is 24 to 240 VAC, and the operating load voltage range is 19 to 264 VAC.
What input control voltages are available?
The G3NA-240B family includes separate input versions for 5 to 24 VDC, 100 to 120 VAC and 200 to 240 VAC. These are different model variants. Check the complete model suffix and input marking before selecting a replacement.
Does the G3NA-240B support zero-cross switching?
Yes. The G3NA-240B AC-output model incorporates a zero-cross function. It switches the AC output near the zero-crossing point of the supply waveform.
Does the relay require a heat sink?
For operation near its 40 A rated load current, an appropriate heat sink is required. Without a heat sink, the specified load current is limited to 6 A at 40°C. Omron lists Y92B-N150 and Y92B-A150N as compatible heat sink options.
What is the maximum inrush current?
The manufacturer specifies an inrush current resistance of 440 A at 60 Hz for one cycle. Repetitive inrush conditions must be evaluated separately according to the manufacturer's surge-current characteristics.
What is the difference between G3NA-240B and G3NA-240B-UTU?
The standard G3NA-240B models are certified by UL and CSA. The -UTU designation identifies versions with additional TÜV certification. Confirm the complete model designation when matching equipment requirements.
What is the difference between the DC and AC input versions?
The DC input version accepts 5 to 24 VDC and uses phototriac isolation. The AC input versions accept either 100 to 120 VAC or 200 to 240 VAC and use photocoupler isolation. Their input electrical specifications are different, so they should not be treated as interchangeable without checking the control circuit.
Does the G3NA-240B have built-in surge protection?
Yes. The G3NA series incorporates a built-in varistor to help absorb external voltage surges. This feature supports protection against transient voltage disturbances.
What are the operating temperature limits?
The specified operating temperature range is -30°C to 80°C without icing or condensation. The storage temperature range is -30°C to 100°C.
What certifications does the G3NA-240B have?
Standard G3NA-240B models are certified by UL and CSA. The -UTU versions include TÜV certification. Verify the exact model variant and applicable certification requirements.
What should be checked before ordering G3NA-240B?
Confirm the complete input voltage version, 40 A rated load current, 24 to 240 VAC load voltage, heat sink requirements, screw-terminal configuration and mounting compatibility. The base designation G3NA-240B alone does not identify which control input voltage version is required.
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| Brand | Omron |
| Model Number | G3NA-240B |
| Product Category | Single-Phase Solid State Relay (SSR) |
| Product Series | G3NA |
| Rated Load Current | 40 A |
| Rated Load Voltage | 24 to 240 VAC |
| Load Voltage Range | 19 to 264 VAC |
| Load Current with Heat Sink | 0.1 to 40 A at 40°C |
| Load Current without Heat Sink | 0.1 to 6 A at 40°C |
| Input Control Voltage Options | 5 to 24 VDC / 100 to 120 VAC / 200 to 240 VAC, depending on input version |
| DC Input Operating Voltage | 4 to 32 VDC |
| AC Input Operating Voltage | 75 to 132 VAC or 150 to 264 VAC, depending on input version |
| Input Isolation | Phototriac for DC input version; Photocoupler for AC input versions |
| Switching Function | Zero-Cross Switching |
| Terminal Configuration | Screw Terminals |
| Mounting Method | Screw Mounting |
| Maximum Inrush Current | 440 A (60 Hz, 1 Cycle) |
| Output ON-State Voltage Drop | 1.6 V RMS Maximum |
| Leakage Current | 5 mA Maximum at 100 VAC; 10 mA Maximum at 200 VAC |
| Insulation Resistance | 100 MΩ Minimum at 500 VDC |
| Dielectric Strength | 2500 VAC, 50/60 Hz for 1 Minute |
| Operating Temperature | -30°C to 80°C (No Icing or Condensation) |
| Storage Temperature | -30°C to 100°C (No Icing or Condensation) |
| Operating Humidity | 45% to 85% RH |
| Built-in Surge Protection | Varistor for Absorbing External Surges |
| Operation Indicator | Equipped |
| Protective Cover | Equipped |
| Recommended Heat Sink | Y92B-N150 or Y92B-A150N |
The Omron G3NA-240B is a single-phase solid state relay with a rated load current of 40 A. It is designed for AC load switching in industrial control equipment, electrical panels and heating systems. The maximum 40 A load rating requires an appropriate heat sink and suitable thermal conditions.
The relay supports a rated load voltage of 24 to 240 VAC, with an operating load voltage range of 19 to 264 VAC. This range supports compatible single-phase AC control applications in industrial machinery and electrical equipment.
The G3NA-240B incorporates a zero-cross function for AC output switching. This function switches the output near the AC voltage zero-crossing point, helping reduce electrical noise and switching disturbances in compatible AC load applications.
The G3NA-240B family is available with different control input versions, including 5 to 24 VDC, 100 to 120 VAC and 200 to 240 VAC. The DC-input version uses phototriac isolation, while the AC-input versions use photocoupler isolation. Confirm the complete input variant before ordering.
A built-in varistor helps absorb external voltage surges and supports protection of the relay against transient disturbances. This feature is useful in industrial electrical installations where switching operations and inductive loads may generate voltage transients.
The relay includes an operation indicator and protective cover. With a suitable heat sink, the rated load current reaches 40 A at 40°C. Without a heat sink, the specified load current is limited to 6 A at 40°C. Proper thermal design and load-current derating are essential for reliable operation.
We support online purchase of the Omron G3NA-240B Solid State Relay. For bulk purchasing or inquiries about other Omron control components, please contact our team with your requirements. We can provide information regarding quantity quotations, delivery arrangements and transportation methods. Before ordering, confirm the complete input control voltage version, rated load current, AC load voltage and required heat sink configuration to ensure compatibility with your equipment.
What is the Omron G3NA-240B?
The Omron G3NA-240B is a single-phase AC-output solid state relay designed for industrial load switching. It has a rated load current of 40 A and a rated load voltage range of 24 to 240 VAC.
What is the maximum load current?
The rated load current is 40 A at 40°C when used with an appropriate heat sink. Without a heat sink, the specified maximum load current is 6 A at 40°C. Actual allowable current also depends on ambient temperature and thermal installation conditions.
What is the load voltage range?
The rated load voltage is 24 to 240 VAC, and the operating load voltage range is 19 to 264 VAC.
What input control voltages are available?
The G3NA-240B family includes separate input versions for 5 to 24 VDC, 100 to 120 VAC and 200 to 240 VAC. These are different model variants. Check the complete model suffix and input marking before selecting a replacement.
Does the G3NA-240B support zero-cross switching?
Yes. The G3NA-240B AC-output model incorporates a zero-cross function. It switches the AC output near the zero-crossing point of the supply waveform.
Does the relay require a heat sink?
For operation near its 40 A rated load current, an appropriate heat sink is required. Without a heat sink, the specified load current is limited to 6 A at 40°C. Omron lists Y92B-N150 and Y92B-A150N as compatible heat sink options.
What is the maximum inrush current?
The manufacturer specifies an inrush current resistance of 440 A at 60 Hz for one cycle. Repetitive inrush conditions must be evaluated separately according to the manufacturer's surge-current characteristics.
What is the difference between G3NA-240B and G3NA-240B-UTU?
The standard G3NA-240B models are certified by UL and CSA. The -UTU designation identifies versions with additional TÜV certification. Confirm the complete model designation when matching equipment requirements.
What is the difference between the DC and AC input versions?
The DC input version accepts 5 to 24 VDC and uses phototriac isolation. The AC input versions accept either 100 to 120 VAC or 200 to 240 VAC and use photocoupler isolation. Their input electrical specifications are different, so they should not be treated as interchangeable without checking the control circuit.
Does the G3NA-240B have built-in surge protection?
Yes. The G3NA series incorporates a built-in varistor to help absorb external voltage surges. This feature supports protection against transient voltage disturbances.
What are the operating temperature limits?
The specified operating temperature range is -30°C to 80°C without icing or condensation. The storage temperature range is -30°C to 100°C.
What certifications does the G3NA-240B have?
Standard G3NA-240B models are certified by UL and CSA. The -UTU versions include TÜV certification. Verify the exact model variant and applicable certification requirements.
What should be checked before ordering G3NA-240B?
Confirm the complete input voltage version, 40 A rated load current, 24 to 240 VAC load voltage, heat sink requirements, screw-terminal configuration and mounting compatibility. The base designation G3NA-240B alone does not identify which control input voltage version is required.
