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 38A. 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 HDB 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 )

Specification

Product
Product id	477951
Brand	Cooler Master
Partnr	RS500-ACABB1-EU
EAN/UPC code	4719512047538
Endurance
Mean time between failures (MTBF)	100000 uur
Power
Nominal power	500 W
AC input voltage	200 - 240 V
AC input frequency	47 - 63 Hz
Input current	5 A
Power factor	0.9
Power Factor Correction (PFC) type	Active
Combined power (+3.3V)	120 W
Combined power (+12V)	456 W
Combined power (+5V)	120 W
Combined power (-12V)	3.6 W
Combined power (+5Vsb)	12.5 W
Max output current (+3.3V)	20 A
Max output current (+12V)	38 A
Max output current (+5V)	20 A
Max output current (-12V)	0.3 A
Max output current (+5Vsb)	2.5 A
Efficiency	85 procent
Hold time	13 ms
Overheat protection	Y
Power protection features	Over current, Over power, Over voltage, Short circuit
Ports & interfaces
Motherboard power connector	24-pin ATX
Number of SATA power connectors	6
Peripheral (Molex) power connectors (4-pin)	3
PCI Express power connectors (6+2 pin)	1
CPU power connector (4+4 pin)	Y
Floppy drive power connector	1
Performance
Purpose	PC
80 PLUS certification	80 PLUS
ATX version	2.31
Bearing technology	HDB
Certification	CE, TUV, EAC
Design
Product colour	Black
Cooling type	Active
Fan diameter	120 mm
Number of fans	1 ventilator(en)
Fan location	Top
Technical details
Form factor	ATX
Operational conditions
Operating temperature (T-T)	0 - 40 °C
Weight & dimensions
Width	150 mm
Depth	140 mm
Height	86 mm
Packaging data
Package type	Box
Other features
Manual	Y
DC output voltage	+12V, +3.3V, +5V, +5Vsb, -12V