BT Business Direct - PC Hardware, Components, Software, Digital Cameras, MP3 players
Help Checkout Regular buy list
Your basket is empty

CoolerMaster B Series B400 400W 80+ ATX PSU

CoolerMaster B Series B400 400W 80+ ATX PSU

Review this product
Quicklinx: CBKTWS00 Mfr#: RS400-ACABB1-UK


Based on the new regulations in EU from 1st of July, the very successful B-series has been revised. A completely new circuit layout and new components make it compliant to the regulations. The biggest difference for the new B-series is that it now only has a single rail +12V DC out with a max current of 30A. This now means that all Cooler Master power supplies makes use of a single rail instead of multi rail.

  • 80 plus EU 230V certified.
  • Silent 120mm Sleeve fan with intelligent fan-speed control, to enhance longevity and help reduce noise in power unit..
  • Green power design to meet ErP 2013 Lot6 & all new CE energy saving regulation.
  • Powerful +12V rail for strong resistance to any overloading.
  • Fully protection ( OCP/OVP/SCP/OPP ) with build-in Over Temperature Protection ( OTP ).



Product Description
Cooler Master B400 ver.2 - power supply - 400 Watt



Device Type
Power supply - active Power Factor Correction (PFC) - internal
Specification Compliance
ATX12V 2.31
United Kingdom

Power Device

Input Voltage
AC 230 V
Input Voltage Range
AC 200 - 240 V
Frequency Required
47 - 63 Hz
Power Output Connectors Details
1 x power 24 pin ATX with detachable 4 pin section , 1 x power 8 pin +12V with detachable 4 pin section , 2 x 8 pin PCI Express power with detachable 2 pin section , 3 x 4 PIN internal power , 6 x 15 pin Serial ATA power , 1 x 4 PIN mini-power connector
Output Voltage
+3.3, +5, ±12 V
Power Capacity
400 Watt
Output Current
+3.3V - 20 A , +5V - 20 A , +12V - 30 A , -12V - 0.3 A , +5VSB - 2.5 A
80 PLUS Certification


100,000 hours
Cooling System
120 mm fan
Overheat protection, over current protection, over voltage protection, overpower protection, short-circuit protection, single 12V rail, hydrodynamic bearing cooling fan, fan speed control
Compliant Standards
TUV, Energy-Related Products (ErP) Lot 6, EAC, ErP 2013

Manufacturer Warranty

Service & Support
Limited warranty - 3 years

Environmental Parameters

Min Operating Temperature
0 °C
Max Operating Temperature
40 °C

Dimensions & Weight

15 cm
14 cm
8.6 cm

Dimensions & Weight (Shipping)

Shipping Width
20.2 cm
Shipping Depth
23 cm
Shipping Height
9.6 cm
Shipping Weight
1.804 kg

Your shopping basket contains 0 item(s)