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Zalman ZM400B-APS
Zalman ZM400B-APS

300W ATX12V 1.3 Power Supply

Complies 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 400W ATX (version 2.03)/ATX12V power supply supporting Intel Pentium 4 and AMD CPUs. Zalman ZM400B-APS
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).

Supplies Stable Power to Intel Pentium 4: 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.

Realizing a Noise-Free Computing Environment with Auto Control Cooling Fan: 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.

When the temperature inside the power supply is 55°C or less, the cooling fan will operate in 'Quiet' or 'Silent' mode. Zalman ZM400B-APS
Improving Power Factor & Eliminating Harmonics through Active PFC: 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.

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.

Certified with Safety Approval EMC Standards - UL, C-UL, CE, TUV, CB-NEMKO, FCC


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 80A
230VAC 120A
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 235W
+5VDC 0.1A/40A 380W
+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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