Zalman ZM500-RS Resonant Switching 500W PSU

Brand new: Resonant Switching Circuit

We are pleased to present Zalman's new mid-range power supply which pioneers a complete circuit redesign, utilising a new "resonant switching" system which compares very favourably with standard switch-mode power supplies in several areas. Firstly, EMI (electromagnetic interference) is drastically reduced, meaning that the unit operates much more "cleanly" from an electromagnetic point of view.

In addition, unwanted heat generation is reduced by minimising "switching loss" through a technique called Zero Voltage Switching (ZVS). Furthermore, the need for an output inductor is eliminated, leading to outstanding stability and reliability and reduced electromagnetic and acoustic noise. Because less heat is produced as an effect of improved efficiency, the unit's (already very quiet) fan can run more slowly which in turn means even quieter operation.

Safety, reliability and quietness

The ZM500-RS offers multiple safety features including over-voltage protection, over-current protection, short-circuit protection, under-voltage protection and over-temperature protection. As you would expect, it passes all internationally recognised safety approvals and electromagnetic compatibility (EMC) certifications, including UL, FCC, CE, CB and KCC.

It comes with mounting screws, cable ties and a user manual and unlike modular power supplies, all cables are permanently attached to the unit meaning you won't need to go looking for them when the time comes to upgrade and add another drive or card to your PC! It has two independent +12VDC rails, so you can be sure that any voltage ripples or current spikes caused by your graphics cards or peripherals will not appear on the supply feeding your processor and motherboard, translating into extra stability and reliability.

Unsurprisingly, the fan is a top-quality unit with hydro bearing for low noise and long life (150,000 hours expected lifespan, or if you prefer, over 17 years!). Its control circuit is linked to an internal temperature sensor, so the fan will only ever increase in speed if the unit detects that it is working hard and needs a little extra cooling. At all other times, the fan will run at a minimum nominal speed, providing you with a quiet and comfortable computing environment.

Features

 

Form factor	ATX12V v2.3 / EPS 12V
+3.3V max load	24 A
+5V max load	24 A
+12V1 max load	18 A
+12V2 max load	18 A
Combined maximum output +3.3V / +5V	130 W
-12V max load	0.5A
+5VSB maximum standby current	3.0 A
PFC Type	Active PFC
Power Factor	99% max
Power conversion efficiency	87% max @ 230 VAC
Number of hard drive connectors	4
SATA connectors	2
Number of floppy drive connectors	1
Dimensions, mm	140(L) x 150(W) x 86(H)
ATX12V (4-pin)/EPS12V (8-pin) support	Yes, splitter
20/24-pin ATX connector	Yes
PCI-E support	One 6-pin and one 8/6-pin
Mains input voltage	100-240 VAC, 50-60 Hz
Fan speed control	Thermal
Over voltage protection	Yes
Over current protection	Yes
Short circuit protection	Yes
Over temperature protection	Yes
Under voltage protection	Yes
EMC, safety approvals	CE, CB, UL, KCC, FCC
Mains input voltage selection	Auto-range
Length of motherboard power cable	45 cm (approx)
Fan speed	800 RPM - 1250 RPM depending on load
Acoustic noise level	18-25 dB depending on fan speed
Warranty	36 months

 

This product has a 3 year warranty