The document introduces the features and characteristics of a product. The product is a laptop. The brand is Dell. The model is XPS 13.
The Series 21 brushless DC axial fan is a compact cooling device with a plastic UL 94V‑0 impeller and a die‑cast aluminum frame. It is supplied with UL 1007 AWG #22 lead wires and is available in several part numbers (DB17251_48U, DB17251_48H, etc.) that differ by rated voltage and performance.
Key performance figures include a rated voltage of 48 V, speed ranging from 4 400 RPM to 5 500 RPM, airflow up to 408 CFM, and noise levels around 62–68 dBA. The fan weighs 960 g (33.86 oz) and features optional function types, with dimensions of 72 × 51 mm and a CCW rotational direction when viewed from the front.
| Impeller material | Plastic (UL 94V‑0) |
|---|---|
| Frame material | Diecast Aluminum |
| Weight | 960 g (33.86 oz) |
The fan weighs 960 g (33.86 oz).