Description

A 200 W power supply unit (PSU) is designed to take standard AC mains power (usually 100 – 240 VAC) and convert it into multiple regulated DC voltages needed by desktop computers or similar electronics. The unit provides reliable power to the motherboard, CPU, storage drives, fans, and other peripherals in basic desktop systems. Many units are in compact ATX form factor, suitable for small PCs, home office computers, or legacy systems.

Key Specifications — 200 W Power Supply

General

• Maximum Continuous Power Output: 200 W total DC power.

• Form Factor: ATX standard (fits most desktop PC cases).

• Input Voltage: 100 – 240 VAC, 50–60 Hz (universal AC mains).

• Input Current: ~2.5 A (depends on design).

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Output & Connectors

• Main Power Connector: 20+4-pin ATX (standard motherboard power).

• CPU Power: 4+4-pin ATX12V/EPS (provides power to CPU).

• Peripheral Connectors:

  • SATA power for drives (commonly 1–3)

  • Molex / IDE connectors for older drives or fans.

  • Floppy (optional) on some models.

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Cooling

• Cooling Fan Size: Typically 80 – 120 mm fan for airflow and temperature control.

• Noise Level: Around ~14 dB (quiet under light load on some models).

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Protections & Safety

Common electrical protection features include:

• Over Voltage Protection (OVP)

• Over Power Protection (OPP)

• Under Voltage Protection (UVP)

• Short Circuit Protection (SCP)
  These help protect PC components from damage due to power faults.

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Certifications & Standards

• ATX12V Compliance — supports standard desktop motherboard power specs.

• CE & RoHS — basic safety and environmental compliance marks.

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Efficiency & Performance

• Typical Efficiency: Around ~80 – 85 % (varies by brand/design).

• Efficiency indicates how much AC input is converted to DC output; higher is better.

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Physical

• Dimensions: Often around 150 × 145 × 85 mm (ATX size).

• Weight: ~0.5 kg (varies by construction).

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Typical Output Rails

Basic 200 W ATX PSUs provide standard voltage rails such as:

• +12 V: Primary output for CPU, fans, drives

• +5 V & +3.3 V: Legacy logic/USB/older components

• +5 VSB: Standby power

• –12 V: Low-power legacy rail (if present)
  (This is the standard configuration, though specific current limits vary by model.)

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Usage Notes

✔ Suitable for entry-level desktops, home/office PCs, and basic multimedia systems.