# be quiet! BN300 System Power 9 400W CM, Modular, 80 Plus Bronze, Power Supply,Black

- Category: Power Supply
- Brand: be quiet!
- Model: BN300
- Part number: BN300
- Price (US): currently unavailable
- Price last checked: 2026-08-05
- Rating: 4.7/5 from 1186 Amazon reviews
- Warranty: 5 years
- Product page: https://buildmypc.net/component-details/power-supply/be-quiet-bn300/

## Specifications

| Spec | Value |
| --- | --- |
| Brand | be quiet! |
| Model | BN300 |
| Power | 400 W |
| Efficiency | 80+ Bronze |
| Color | Black |
| Form Factor | ATX |

## Key Features

- Power: 400 watts
- Volume level: 9.5 18.6 dB(A)
- Features: Cable Management, Active PFC, 80 Plus 230 V EU
- Standard: ATX12V 2.4
- Fan: 120 mm

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