be quiet! · Power Supply Unit

be quiet! TFX POWER 3 300W Bronze price in United Kingdom

MPN BN322EAN 4260052188286

Noise29.1 dB
Weight900 g
ColourBlack
Total power300 W

Lowest price incl. delivery

£58.99

at Back to the OfficeFree deliveryIn stock

1 store
1 in stock
1 with free delivery
Checked 6 Oct 2026, 05:40 UTC

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Full specifications and side-by-side comparison

Prices in United Kingdom

1 store · prices in GBP · updated 6 Oct 2026, 05:40 UTC

Lowest price£58.99at Back to the Office · free shippingGo to Back to the Office

Price range across 1 offer

Every store asks the same price.

1 of 1 stores in stock
1 with free shipping
Checked 6 Oct 2026, 05:40 UTC

Back to the OfficeLowest pricebe quiet! TFX POWER 3 300W Bronze power supply unit 20+4 pin ATX Black In stockFree shipping
£58.99incl. free shipping
Go to store : Back to the Office (opens in a new tab)

Ad: we may earn a commission when you buy through these links; it never changes the order, which is by total price only. Prices and stock are shown as each store states them, as of 6 Oct 2026, 05:40 UTC, and can change at any time. Taxes are included only where the store includes them.

Price history in United Kingdom

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Best price · Back to the Office£58.99

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Product details

Identification

Brand: be quiet!
Product: TFX POWER 3 300W Bronze
Full name: be quiet! TFX POWER 3 300W Bronze power supply unit 20+4 pin ATX Black
Manufacturer part number: BN322
EAN / UPC: 4260052188286
Category: Power Supply Unit

66 specifications from the manufacturer's data sheet

Power

Total power	300 W
Peak power	350 W
AC input voltage	100 - 240 V
AC input frequency	50 - 60 Hz
Input current	4/1.5 A
Maximum input current (@110V)	4 A
Maximum input current (@220V)	1.5 A
Power factor	0.96
Power Factor Correction (PFC) type	Active
Combined power (+3.3V)	85 W
Combined power (+12V)	300 W
Combined power (+5V)	85 W
Max output current (+3.3V)	16 A
Max output current (+12V1)	25 A
Max output current (+5V)	16 A
Max output current (-12V)	0.3 A
Max output current (+5Vsb)	2.5 A
Efficiency	86.4%
Hold time	22 ms
Power protection features	Over current, Over power, Over voltage, Short circuit, Under voltage

Ports & interfaces

Motherboard power connector	20+4 pin ATX
Motherboard power cable length	35 cm
Number of SATA power connectors	3
SATA power cable length	300,450,600 mm
Peripheral (Molex) power connectors (4-pin)	2
Peripheral (Molex) power cable length	300,450 mm
PCI Express power connectors (6+2 pin)	1
PCI Express power cable length	40 cm
CPU P4 connector (4-pin)	1
CPU power cable length	35 cm
Floppy disk drive cable length	60 cm
Floppy drive power connector	1
PCI Express connector	Yes
Cabling type	Non-Modular

Performance

Purpose	PC
Power supply unit (PSU) form factor	TFX
80 PLUS certification	80 PLUS Bronze
ATX version	2.52
EPS version	2.92
Noise level	29.1 dB
Bearing technology	Rifle
Mean time between failures (MTBF)	100000 h

Design

Product colour	Black
Cooling type	Active
Fan diameter	8 cm
Number of fans	1 fan(s)
Illumination	No

Certificates

Compliance certificates	RoHS, WEEE

Safety regulation & standards

Safety	CE, CB, TÜV, CU

Weight & dimensions

Width	85 mm
Depth	175 mm
Height	65 mm
Weight	900 g

Packaging data

Package width	159 mm
Package depth	80 mm
Package height	215 mm
Package weight	1.24 kg
Package type	Box

Technical details

Sustainability certificates	ENERGY STAR, ErP
Sustainability compliance	Yes

Logistics data

Products per shipping (inner) case	6 pc(s)
Shipping (inner) case gross weight	8.25 kg
Shipping (inner) case height	19.5 cm
Shipping (inner) case length	47.4 cm
Shipping (inner) case width	27.5 cm
Harmonized System (HS) code	84733020