
Best for safety conscious parents who want a single high quality seat to last from birth to middle school
- 10 year lifespan from 5 to 120 pounds
- Built-in cooling channels for airflow
- Steel reinforced frame
Head to head · Car Seats
Ravvy scores Ellaris 3-in-1 Convertible Car Seat at 85.38 and Radian 3R, 3-in-1 Convertible Car Seat at 86.09. Radian 3R, 3-in-1 Convertible Car Seat takes the overall pick.

Safety 1st
$100
This is an excellent choice for families needing to fit three-across or travel frequently by air, provided they are comfortable with a more basic installation system.
Ravvy pick

$200
This is the definitive choice for growing families needing to fit three children across a single row, provided they can manage its heavy steel frame and technical installation process.
| Factor | Ellaris 3-in-1 Convertible Car Seat | Radian 3R, 3-in-1 Convertible Car Seat |
|---|---|---|
| Portability | 96.5 | 72 |
| Value for money | 95.5 | – |
| Maintenance ease | 91 | – |
| Space efficiency | 94 | 98.5 |
| Comfort and padding | 68 | – |
| Ease of installation | 72 | 65.5 |
| Longevity | – | 94 |
| Ease of cleaning | – | 84 |
| Safety construction | – | 96 |
What owners praise
What to know first
Skip it if parents seeking luxury padding or high-end latch connectors
Skip it if parents who frequently switch the seat between different vehicles
| Spec | Ellaris 3-in-1 Convertible Car Seat | Radian 3R, 3-in-1 Convertible Car Seat |
|---|---|---|
| UPC | 884392007737 | 677726506200 |
| ASIN | B0DXMFYHNV | B083F5P7VP |
| Brand | Safety 1st | Diono |
| Color | Smokey Haze | Black Jet |
| Unit Count | 1 Count | 1 Count |
| Item Weight | 12 pounds | 23 pounds |
| Orientation | Forward Facing, Rear Facing | Convertible Seat |
| Part Number | CC396HNH | 50620 |
| Harness Type | 5-Point | 5-Point |
| Manufacturer | Dorel Juvenile Group | Diono |
| Model Number | CC396HNH | 50620 |
| Material Type | Polyester | Alloy Steel, Plastic, Polypropylene, Polystyrene |

Best for safety conscious parents who want a single high quality seat to last from birth to middle school

Best for parents prioritizing extended rear-facing safety for taller children.

Best for carpooling and multi-vehicle families needing a portable, safe booster.