The Omron G3NA-240B-UTU DC5-24 is a 40 A solid-state relay from the G3NA Series, switching AC loads from 24 to 240 VAC using a DC control signal of 5 to 24 VDC. The phototriac output and zero-crossing switching minimize inrush and EMI on resistive or lightly inductive loads — useful when you need clean switching on a heater bank or lamp circuit without the contact wear of a mechanical relay. Rated output current holds at 40 A both with and without an external heat sink, though the heat sink is not included. That 40 A figure is the maximum; real-world derating depends on ambient temperature and enclosure airflow — at 176 °F (80 °C) ambient the continuous current drops significantly. For a panel builder, the surface-mount form factor (1.1 x 1.69 x 2.28 in) and screw terminals simplify wiring into a control cabinet, and the finger-safe design reduces arc-flash exposure during maintenance.
Omron G3NA-240B-UTU DC5-24 Solid State Relay, 40 A, 5-24 VDC
MPNG3NA-240B-UTU DC5-24
Omron G3NA Series, G3NA-240B-UTU DC5-24, Solid State Relay, Surface Mounted, 40 A Max Output Current, Phototriac, AC Output, 5 to 24V DC Input, 24 to 240V AC Output.
$112.09 – $128.33Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
Specifications
| Parameter | Value |
|---|---|
| Series | G3NA Series |
| Current type | DC |
| Voltage (Current type) | AC Output |
| Switch component type | Phototriac |
| Electrical connection type | Screw |
| Input voltage | 5 to 24V DC |
| Output voltage | 24 to 240V AC |
| Input current | 40 A |
| Maximum output current with heat sink | 40 A |
| Maximum output current without heat sink | 40 A |
| Relay mounting style | Surface |
| Maximum operating temperature | 176 °F |
All specifications
| Parameter | Value |
|---|---|
| Minimum operating temperature | -22 °F |
| Body depth | 1.1 in |
| Body width | 1.69 in |
| Body height | 2.28 in |
| Standards | CE Certified; CSA Certified; TUV Certified; UL Listed |
| Heat sink | Not Included |
| Finger safe | Yes |
| Status indicator | LED Indicator |
| Switch configuration | Form A |
| Insulation resistance | 100 megaohm |
| Output switching mode | Zero Crossing |
Product details
Frequently asked questions
What are the key ratings for this SSR?
Output current is 40 A maximum (same with or without a heat sink). Input control voltage is 5 to 24 VDC; output voltage range is 24 to 240 VAC. Switching is zero-crossing via a phototriac output.
What safety approvals does this relay carry?
It is UL Listed, CSA Certified, CE Certified, and TUV Certified, covering North American and European regulatory requirements for industrial control equipment.
Does the G3NA-240B-UTU DC5-24 include a heat sink?
No, the heat sink is not included. The 40 A rating applies both with and without an external heat sink, but thermal derating must be considered at elevated ambient temperatures.
MPN
G3NA-240B-UTU DC5-24