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Article number: BN207

SYSTEM POWER B9

350W (bulk)

Proven Reliability and Good Efficiency

be quiet! System Power B9 350W (bulk) is specially designed to suit the needs of price-conscious PC builders.

  • Production-optimized bulk packaging
  • Rock-solid stability with 2 strong 12V-rails
  • PCIe connector for GPU support
  • Temperature-controlled 120mm fan reduces system noise
  • Stand-by drain of less than 0.13 watts
  • Certified 80 PLUS® efficiency (up to 87%)
  • Complete suite of top safety features
  • Meets latest Intel® C6/C7, ErP and Energy Star 6.1 guidelines
  • 3-year manufacturer’s warranty
  • Product conception, design and quality control in Germany

OPTIMIZED FOR PROFESSIONAL SYSTEM INTEGRATORS

Cost effective and efficient handling

System Power B9 was designed to meet the needs of system integrators. The PSU is very cost-efficient and comes in production-optimized bulk packaging. This ensures quick and easy handling to streamline the production of pre-configured PCs.

VERY QUIET OPERATION

Achieved by high-quality fan

System Power B9 350W is equipped with a temperature-controlled 120mm fan. This ensures its operation produces the low noise that be quiet! is famous for.

HIGH PERFORMANCE FOR YOUR SYSTEM

Proven reliability for CPU and GPU

System Power B9 350W provides stable power for the CPU and GPU. It is equipped with 2 independent 12V-rails and one PCI express connector. 

COMPREHENSIVE PROTECTION

A complete range of safety features

Top component protection with a full suite of safety functions, including OCP, OVP, OPP, OTP UVP and SCP, which provide the ultimate in secure operation.

All models at a glance:

Product Series

General data

ModelSystem Power B9 350W (bulk)
Continuous power (W)350
Peak power (W)-
Form factorVersion 2.4
Form factor EPS 12V-
Modular Cable management-
TopologyDouble forward
Wire-free design (DC-side)-
Voltage (Vac)200 - 240
Frequency (Hz)50
Input current (A)3
PFCactive
Power factor at 100% load>0.95
Compliant to Intel C6/C7
Power consumption in standby (W)<0.13
Average life time (h / 25°C)100,000
Operating temperature up to (°C)40

Infographics

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Output

12V rails (multi-rail operation)2
12V single rail operation-
Overclocking key-
+3.3V (A)19
+5V (A)15
+12V1 (A)20
+12V2 (A)16
+12V3 (A)-
+12V4 (A)-
+12V5 (A)-
+12V6 (A)-
-12V (A)0.3
+5Vsb (A)2.5
Max. combined power 12V (W)324
Max. combined power 3.3V + 5V (W)103
Hold-up time at 100% load (ms)17 (@75%)
Power good signal100 - 500ms

Fan / Cooling technology

Fan typeHigh quality fan
+SilentWings-
Bearing technologySleeve
Motor technology4-pole fan motor
Fan size (mm)120
Max. fan speed (rpm), temperature-dependent1650
Temperature control for case fans-
dB(A) at 20% load12.1
dB(A) at 50% load12.3
dB(A) at 100% load24.9

Protection

OCP (over current protection)
OVP (over Voltage protection)
UVP (under Voltage protection)
SCP (short circuit protection)
OTP (over temperature protection)
OPP (over power protection)
SIP (Surge & Inrush Protection)

Safety certification

CE
CB
TÜV
FCC-
cRUus-
cTUVus-
RCM (Australia)
BSMI-
CU (Russia)
CCC-

Eco / Efficiency

80 PLUS certificationStandard (230V EU internal)
Efficiency (%) at 230V, 20% load84
Efficiency (%) at 230V, 50% load87
Efficiency (%) at 230V, 100% load84

Environmental directives

Energy Star6.1
ErP
WEEE
RoHs

Cables / Connectors

Nvidia® SLI (RTX 3090) ready-
Cable managementFixed
Sleeved cables-
Cable length to mainboard (cm)45
Flat cables-
Cable length to first connector (cm)40
Maximum cable length (cm)85
All-in-one cable (SATA/PATA/FDD)-
No. of cables5
ATX-Motherboard (20+4-pin)1 (24-pin)
P8 (CPU)-
P4+4 (CPU)1
P4 (CPU)-
PCI-e 6-pin (GPU)-
PCI-e 6+2-pin (GPU)1
PATA2
SATA4
FDD (Floppy)-
External fan connectors-

Casing

Dimensions without cable (L x W x D), (mm)140 x 150 x 86
Weight (kg)1.6
Color-

Accessories

Thumb screws-
Screws-
Cable ties-
Velcro cable ties-
Box/Bag for PSU/Cables-
User manual languages-
OCK slot bracket with switch / OCK jumper-
SFX-to-ATX adapter bracket-

Service

Warranty (Years)3
Express replacement service in first year-
International hotline / free of charge✓ / DE, FR

Logistics data, RRP

Article numberBN207
EAN code4260052185995
Dimensions, package (L x W x H), (mm)-
Gross weight, package (kg)-
Pieces per packaging unit10
Dimensions, shipping box (L x W x H), (mm)195 x 525 x 545
Gross weight, shipping box (kg)18.3
RRP (€)-

SYSTEM POWER B9 | 350W (bulk)
Article number: BN207

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