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Zalman ZM300B-APS
Zalman ZM300B-APS

300W ATX12V 1.3 Power Supply

Complies with Intel ATX12V ver 1.3. This power supply was designed to comply with Intel ATX12V Ver. 1.3. S-ATA power connectors supporting S-ATA Ver. 1.0 compliant hard disk drives are provided as standard.

With the goal of enhancing the computing environment, all Zalman Tech products are noise-free. This product is a noise-free 300(400)W ATX (version 2.03) / ATX12V power supply supporting Intel Pentium 4 and AMD CPUs.

By implementing heat-sensor circuitry that controls the cooling fan's speed (rpm) in relation to the temperature within the power supply, emanating noise has been greatly reduced. Zalman ZM300B-APS
When the temperature inside the power supply is 55°C or less, the cooling fan will operate in 'Quiet' or 'Silent' mode.

Unlike products with Passive PFC, where you have to set the operating voltage (115VAC / 230VAC) with a manual switch, this product can be used with any normal AC input source ranging from 100VAC to 240VAC. Zalman ZM300B-APS
Certified with Safety Approval EMC Standards - UL, C-UL, CE, TUV, CB-NEMKO, FCC

By implementing Active PFC, the power factor (PF) is improved from 75% (Passive PFC) to 94% (at full load), while harmful harmonic frequencies are reduced below regulatory requirements.

By including a ATX12V 2x2 (4-pin) 12V power connector and an auxiliary 5-pin power connector, this product can provide stable power to Intel Pentium 4 CPUs, which need 6A of current from each power rail.

High Efficiency Power Supply: Designed with a high switching frequency and low power-loss circuitry, the efficiency of this product exceeds 75% (at full load).


AC Input Requirements
AC Input Range Voltage 100VAC ~ 240VAC ±10%
Frequency 47Hz~63Hz
AC Input Current (Rated) 115VAC 10A
230VAC 5A
PFC Type Active PFC
Power Factor >85% (Typical) @115VAC
Inrush Current Limit
(@ Cold start at 25°C)
115VAC 60A
230VAC 90A
Efficiency 75% minimum @ 230VAC (Full Load)

DC Output Voltage Regulations (at Full load)
Vout Regulation Range
+5VSB ±5% +4.75V ~ +5.25V
+3.3VDC ±5% +3.14V ~ +3.45V
+5VDC ±5% +4.75V ~ +5.25V
+12VDC ±5% +11.4V ~ +12.6V
-12VDC ±10% -10.8V ~ -13.0V
-5VDC ±10% -4.50V ~ 5.50V

DC Output Load Capacity
Vout Output Load Rating
Combined Power
+3.3VDC 0.3A/28A 180W
+5VDC 0.1A/30A 280W
+12VDC 0.0A/18A/19.5A  
-12VDC 0.0A/0.8A 20W
-5VDC 0.0A/0.3A  
+5VSB 0.0A/2.0A/2.5A  

DC Output Ripple & Noise (at Full Load)
Vout Specification
+5VSB 50mV
+3.3VDC 50mV
+5VDC 50mV
+12VDC 120mV
-12VDC 120mV
-5VDC 100mV

System Protections & Safety
Protections Over-Voltage Protection (OVP), Over-Current Protection (OCP), EMC(EMI & EMS), Short Circuit Protection (SCP)

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