Part of the Omron Solid State Relays series — see the full model table, lifecycle status and replacement parts.
Omron G3NA-450B-UTU-2 DC5-24V — SSR, 50 A, 480 VAC
SKU: G3NA-450B-UTU-2 DC5-24VUSD 59.00
Omron G3NA-450B-UTU-2 DC5-24V G3NA solid state relay, 50 A, 200-480 VAC, 5-24 VDC in. In stock.
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Product Overview
The Omron G3NA-450B-UTU-2 DC5-24V is a 50 A single-phase solid-state relay from the G3NA panel-mount family, manufactured by Omron Corporation. Hengyixin Automation stocks this solid-state relay in Xiamen and ships within 3-5 business days in original Omron packaging with the lot code visible.
The output switches 200-480 VAC at 50 A continuous, with an M5 screw terminal on each side of the hockey-puck case. Switching is zero-cross, so the triac only fires near the AC zero to cut EMI and inrush on resistive loads. Input is 5 to 24 VDC at 7 mA max.
Phototriac isolation separates input from output. A built-in varistor absorbs external surges on the AC line. Mount the relay on a Y92B-N150 heat sink for the full 50 A rating. The body is 30 x 43 x 58 mm, -30 to +80 degC. For a 40 A alternative, pick the G3NA-240B-UTU DC5-24. For a three-phase SSR, pick the G3NB-240B-1 DC5-24V.
Key Features
- G3NA single-phase solid-state relay, 50 A, 200-480 VAC load
- Zero-cross switching cuts EMI and inrush on resistive loads
- 5 to 24 VDC control input, phototriac isolation, built-in varistor
- M5 screw output terminals, 30 x 43 x 58 mm hockey-puck case, -30 to +80 degC
- SKU: G3NA-450B-UTU-2 DC5-24V
- Series: Omron G3NA-series single-phase panel-mount solid-state relay
- Voltage: 200 TO 480 VAC
Best-Fit Applications
- Industrial heater control on a plastic extruder where the zero-cross switching extends the heater life
- PID temperature loop on a reflow oven where the 24 VDC control reads from a CP1L transistor
- Spare drop-in for an existing G3NA panel where the Y92B-N150 heat sink is already mounted
Buying Checklist
- Pick the G3NA-450B-UTU-2 DC5-24V for a 50 A single-phase SSR on a hockey-puck case with zero-cross switching.
- Pick the G3NA-240B-UTU DC5-24 instead when the load only needs 40 A on the same 480 VAC class.
- Pick the G3NB-240B-1 DC5-24V instead when the cabinet needs a 40 A three-phase SSR on the same control voltage.
Technical Specifications
| Manufacturer | Omron Corporation (Japan) |
|---|---|
| Series | Omron G3NA-series single-phase panel-mount solid-state relay |
| Model / SKU | G3NA-450B-UTU-2 DC5-24V |
| Rated Load Voltage | 200 to 480 VAC (operating range 180-528 VAC) |
| Rated Load Current | 50 A continuous at 40 degC (with proper heat sink) |
| Control Input Voltage | 5 to 24 VDC |
| Control Input Current | 7 mA max at 24 VDC |
| Switching Mode | Zero-cross (triac) |
| Isolation | Phototriac; 4 kV dielectric strength |
| On-State Voltage Drop | 1.6 V (RMS) max at 50 A |
| Surge Protection | Built-in varistor across the AC output |
| Termination / Mounting | M5 screw terminals; panel mount with Y92B-N150 heat sink |
FAQ for G3NA-450B-UTU-2 DC5-24V
What heat sink do I need for the G3NA-450B-UTU-2?
Mount the relay on a Y92B-N150 heat sink for the full 50 A rating. Apply a thin layer of the supplied silicon grease between the relay base and the heat sink. At ambient above 40 degC, add forced-air cooling or step down to the G3NA-240B-UTU DC5-24.
Can the G3NA-450B-UTU-2 switch DC loads?
No. The -450B triac output is for AC loads only. For DC loads up to 200 VDC, use the G3NA-D210B-UTU DC5-24 MOSFET output. For three-phase AC at 40 A, use the G3NB-240B-1 DC5-24V.
Why is zero-cross switching important?
Zero-cross switching fires the triac near the AC zero-crossing point, which cuts the inrush current and EMI on resistive loads like heaters and lamps. For phase-angle control of inductive loads, switch to the G3NA-450B-UTU-1 (random-fire) variant.
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