80 PLUS Power Supplies
ATX 450W 500W 550W 600W 80 PLUS Computer Power Supply
- Rated Power450W
- Output Rails+3.3V +5V +12V1 +12V2 -12V +5VSB
- Dimensions150x86x160mm (WxHxL), 14cm Fan
80 PLUS Power Supplies · Model ATX 300W 350W 400W
ATX 300W 350W 400W 80 PLUS Computer Power Supply
ATX 300W 350W 400W 80 PLUS Computer Power Supply is a switching power supply rated at 300W with a peak output of 400W.
- Rated Power300W
- Peak Power400W
- Dimensions150x86x140mm (WxHxL), 12cm Fan
Product Overview
What This Model Is and What It Takes
ATX 300W 350W 400W 80 PLUS Computer Power Supply is a switching power supply rated at 300W with a peak output of 400W. It carries the +3.3V +5V +12V1 +12V2 -12V +5VSB rail set and accepts 230VAC (180-264VAC) input. Mechanically it is 150x86x140mm (WxHxL), 12cm Fan. Power factor correction is PPFC.
Technical Features
- Complies with ATX12V V2.3
- High efficiency
- Supports Intel & AMD Dual Core CPUs
- Supports medium video cards
- Magnetic amplifier technique
- 100% Hi-pot test
- 100% Burn-in test
- MTBF>=50, 000 hours at 25°C
Key Benefits
The Figures That Decide Whether This Model Fits Your Build
- Rated power 300W and peak power 400W are listed separately, so the unit can be compared honestly against a peak-labelled competitor
- Per-rail maximum load is published as 21.0A 15.0A 13.0A 13.0A 0.3A 2.5A across +3.3V +5V +12V1 +12V2 -12V +5VSB
- Voltage regulation is specified at ±5% ±5% ±5% ±5% ±10% ±5% rather than described as stable
- Ripple and noise figures of 50mV 50mV 120mV 120mV 120mV 50mV are available for your engineering review
- Mechanical envelope 150x86x140mm (WxHxL), 12cm Fan allows a fit check against the chassis before ordering
- Complies with ATX12V V2.3 as stated by the factory
Who It Is For
Buyers This Model Is Specified By
- Assemblers pairing a supply to a known board and graphics card load
- Distributors who need real-watt labelling they can defend to a customer
- Internet cafe operators watching the electricity bill across a whole floor
- Industrial and embedded builders fitting 1U, 2U and slim enclosures
- Peak wattage printed on the box while rated wattage is far lower
- Rail loading that collapses once a graphics card is added
- Ripple and regulation figures the supplier will not put in writing
- Fan noise complaints traced back to the power supply rather than the CPU cooler
Application Scenarios
Where This Model Is Used
Standard office desktops with integrated graphics
Gaming builds with a discrete graphics card on the +12V rails
1U and 2U rack chassis with no room for a standard ATX supply
Slim horizontal desktops under a monitor
Specifications
Full Factory Specification Table
Reproduced from the factory specification sheet for this model. Figures the factory does not publish are left out rather than estimated.
| Input Voltage | 230VAC (180-264VAC) |
|---|---|
| Rated Power | 300W |
| Peak Power | 400W |
| Output Rails | +3.3V +5V +12V1 +12V2 -12V +5VSB |
| Max Load | 21.0A 15.0A 13.0A 13.0A 0.3A 2.5A |
| Min Load | 0.5A 0.3A 1.0A 1.0A 0.0A 0.0A |
| Voltage Regulation | ±5% ±5% ±5% ±5% ±10% ±5% |
| Ripple and Noise | 50mV 50mV 120mV 120mV 120mV 50mV |
| Dimensions | 150x86x140mm (WxHxL), 12cm Fan |
| PFC Type | PPFC |
Materials
- Switching topology with magnetic amplifier technique where stated on the model
- Power factor correction: PPFC
- Cooling: 150x86x140mm (WxHxL), 12cm Fan
Certifications
- 80 PLUS efficiency rating as stated for this model on the original specification
- CE EMC certificate held for the power supply line
- CE LVD certificate held for the power supply line
- Produced in ISO 9001:2000 and ISO 14001:2004 certified joint venture plants
Manufacturing Process
How This Model Is Made
- Step 01
PCB populated and reflowed
PCB populated and reflowed
- Step 02
Transformer and magnetics assembled
Transformer and magnetics assembled
- Step 03
Unit assembled into the stamped steel ...
Unit assembled into the stamped steel housing
- Step 04
100% hi-pot test as stated by the fact...
100% hi-pot test as stated by the factory
- Step 05
100% burn-in test as stated by the fac...
100% burn-in test as stated by the factory
- Step 06
Labelled, boxed and packed for export
Labelled, boxed and packed for export
Quality Control
What Is Checked and When
- Component inspection before board assembly
- In-circuit and functional test after assembly
- 100% hi-pot test as stated by the factory
- 100% burn-in test as stated by the factory
- Final visual and labelling check before packing
Customisation Options
What Can Be Changed on This Model
- Private-label printing on the unit and on the colour box
- Cable length and connector configuration specified per order
- Input voltage variant selected for the destination market
- Retail colour box or bulk packing
Comparison
How This Compares With the Alternatives
| A supply labelled only with a peak figure | Rated power 300W peak power 400W are published as separate rows so the comparison is honest. |
|---|---|
| A supply with no published rail table | Per-rail maximum and minimum load, regulation and ripple are all published, which is what an engineering sign-off actually needs. |
| A standard ATX unit in a slim or rack chassis | The mechanical envelope is stated as 150x86x140mm (WxHxL), 12cm Fan, so the fit check happens before the purchase order. |
Use Guide
Checks to Run Before You Place the Order
- Total the +12V draw of your board, drives and graphics card against the published maximum load of 21.0A 15.0A 13.0A 13.0A 0.3A 2.5A
- Compare the unit envelope 150x86x140mm (WxHxL), 12cm Fan against the power supply bay of your chassis
- Confirm the destination mains voltage against the published input voltage range before ordering
- Leave depth behind the unit inside the chassis for the cable exit
- Quote the rated power rather than the peak power in your own product listings
ATX 300W 350W 400W 80 PLUS Computer Power Supply Questions
Is 300W the real continuous output?
Yes. 300W is the rated continuous output and 400W is the peak. Both are listed separately on the specification table on this page so there is no ambiguity in your quotation.
What is the load capability on each rail?
Maximum load is 21.0A 15.0A 13.0A 13.0A 0.3A 2.5A across +3.3V +5V +12V1 +12V2 -12V +5VSB. Minimum load is 0.5A 0.3A 1.0A 1.0A 0.0A 0.0A. Send your target board and graphics card and we will check the +12V budget with you.
Will this unit fit our chassis?
The mechanical envelope is 150x86x140mm (WxHxL), 12cm Fan. Compare it against the power supply bay of the chassis, including the space needed behind the unit for the cable exit.
What certification evidence is available?
CE EMC and CE LVD certificates are held for the power supply line and the certificate images are shown on the About page. Ask us on WhatsApp for the full certificate files for the specific model you are quoting.
Can the unit be supplied with our own label?
Yes, private-label printing on the unit and on the colour box is a standard option. Send your artwork and we will confirm what the printing area allows.
What is the minimum order quantity and lead time?
Both depend on wattage, cable configuration and packing, so we confirm them per order rather than publishing a single figure. Message us the model and quantity for a written answer.
Related Products
Other Models in 80 PLUS Power Supplies
80 PLUS Power Supplies
ATX 700W 800W 900W 1000W 80 PLUS Modular Computer Power Supply
- Output Rails100-240VAC Output 700W Voltage +3.3V +5V +12V1 +12V2 +12V3 +12V4 +12V5 -12V +5VSB
- Dimensions150 x 86 x 160mm (W x H x L), 14cm fan
Related Industries and Solutions
Where This Model Fits a Wider Programme
PC Brands and OEM Programmes
Your own front panel and your own box without funding an outside tool shop
Esports Venues and Internet Cafes
Machines that run long hours and are opened often
Industrial and Embedded Builders
Flex and TFX power inside 1U, 2U and slim enclosures
Case and Power Supply Matching
One quotation where the supply is known to fit and known to carry the load
Private Label and Packaging Programme
Your brand on the chassis, the supply, the box and the manual
Related Guides
Reading That Helps You Specify This Model
How to Read a Computer Power Supply Datasheet Before You Buy in Bulk
Rated versus peak wattage, per-rail load limits, ripple and regulation figures, and the questions that separate a real d
Specifying a Chassis for an Esports Venue or Internet Cafe Floor
Long running hours, frequent servicing and a whole-floor electricity bill change which chassis and power specification i
Get a Quotation on ATX 300W 350W 400W 80 PLUS Computer Power Supply
Send your target quantity and destination port. You will get unit price, MOQ, lead time and how many pieces fit a container, calculated from the published carton data.