Power Supply no wire buying scrap price

Introduction, Construction, Components, and Recycling Value

Examples may include desktop ATX power supplies, compact SFX units, older OEM computer power supplies, workstation power supplies, and similar enclosed switch-mode power supplies. Cooler Master, Seasonic, Thermaltake, Delta, Lite-On, FSP, AcBel and other brands may all qualify. If an item satisfies the official Power Supply no wire acceptance standard, it is purchased at the corresponding grade price regardless of its original retail value.

A typical computer power supply consists of:

• A steel or aluminum enclosure

• An internal printed circuit board

• Copper transformers and inductors

• Aluminum heat sinks

• Electrolytic capacitors

• Power transistors, rectifiers and controller ICs

• A cooling fan and metal grille

• An AC input socket and power switch

• Internal copper wiring

• Output cables and connectors

For this grade, the external motherboard, CPU, PCIe, SATA and peripheral power cables are absent. Short insulated wire stubs may remain at the cable outlet, but complete, reusable cable bundles must not be attached.

The recycling value comes mainly from copper-bearing transformers, coils and internal conductors. Additional value is provided by the steel enclosure, aluminum heat sinks, circuit board, fan motor and small quantities of other nonferrous metals.

However, the material value of a power supply without cables is generally lower than that of an equivalent complete power supply with its original copper-rich wire harness. Output cables can contain a meaningful amount of insulated copper. When those cables are removed, the remaining unit contains less recoverable copper by total weight.

Original wattage or efficiency certification does not automatically determine recycling value. A 700-watt retail power supply without cables is not necessarily graded above a 400-watt unit in the same recycling category. Ohata evaluates the item according to the applicable scrap classification, physical completeness, contamination level and recoverable material content.

Ohata Power Supply No Wire Classification and Identification Guide

To identify the Power Supply no wire grade, inspectors should first confirm that the item is a genuine computer or electronic equipment power supply. It should normally have a recognizable metal enclosure, ventilation openings, AC input section, internal power-conversion board and transformer components.

Use the following identification procedure:

1. Confirm the basic product type

The item must be a power supply unit rather than an empty metal case, fan housing, computer chassis, battery charger shell or unrelated electrical component.

2. Check for an enclosed internal assembly

The main enclosure should still contain its internal power-supply board, transformers, coils, heat sinks and other essential components. An empty housing does not qualify.

3. Inspect the output-wire condition

The external DC output harness must be absent. This includes the primary motherboard connector and other output connectors such as CPU, PCIe, SATA and peripheral connectors.

Acceptable examples may have:

• Cables cut close to the enclosure

• A few short insulated wire stubs at the grommet

• No usable external connector harness

• No detachable modular cables included

A power supply with its full original fixed output cables belongs in a different category, such as a complete or wired power-supply grade.

4. Confirm reasonable physical integrity

Normal scratches, dust, label wear, minor surface oxidation and small dents may be acceptable. The enclosure should not be shattered, separated into several pieces or dangerously deformed.

5. Check for prohibited damage or contamination

The following conditions may cause rejection or separate downgrade treatment:

• Severe fire damage or extensive carbonization

• Melted insulation caused by fire

• Exploded or ruptured enclosure

• Large structural cracks or broken pieces

• Heavy oil, mud or wet contamination

• Hazardous chemicals or biological waste

• Missing internal circuit board or transformers

• Excessive non-power-supply attachments

• Water-filled or deliberately weight-enhanced units

A mixed load containing wired units, no-wire units, empty housings and burned units must not automatically be treated entirely as clean Power Supply no wire material. It may require sorting, deduction or downgrade treatment.

Recoverable Materials, Buying Standards, and Handling

The principal recoverable material is copper. It is commonly found in the main transformer, standby transformer, inductors, electromagnetic interference filters, fan motor and internal conductors. Copper content varies by design, size, wattage and production period, but the Ohata grade is applied according to the accepted category rather than an assumed copper content for one model.

Other recoverable materials include:

• Steel: Primarily from the enclosure, screws, brackets and structural parts

• Aluminum: Commonly found in heat sinks attached to power semiconductors

• Copper: Found in transformers, coils, chokes, wiring and fan windings

• Printed circuit board material: Contains copper tracks, solder and electronic components

• Brass and plated metals: May be present in terminals, switches and AC input parts

• Plastics: Found in the fan, insulation, connectors and internal supports

Precious-metal content is normally limited compared with high-grade computer boards. Small quantities of gold, silver, palladium or other metals may be present in semiconductor packages, contacts and component terminations, but they should not be considered the primary value driver.

Ohata buying standards generally require the following:

• The power supply must contain its internal board and major components.

• The external output-wire harness must be removed or cut off.

• The unit must be reasonably dry and safe to handle.

• Heavy dirt, mud, grease and foreign debris must be excluded.

• Burned, broken and empty units must be separated.

• Batteries and unrelated electronic parts must not be mixed into the shipment.

• Different power-supply grades should be sorted before delivery.

Suppliers should place the units in strong containers because steel edges and cut wires can damage lightweight bags. Avoid throwing units in a way that breaks the housing or dislodges internal parts.

Power supplies may retain dangerous electrical energy in high-voltage capacitors even after being unplugged. Suppliers should not open, drill, crush or dismantle a power supply without appropriate training and safety procedures. Short wire stubs should not be pulled from the enclosure if doing so may expose internal conductors or damage the circuit board.

For commercial loads, keeping the material dry, clean and separated improves inspection efficiency and reduces the likelihood of deductions.

Comparison and Official Ohata Classification

The easiest way to distinguish Power Supply no wire from related grades is to compare cable condition, internal completeness and physical condition.

The most important distinction is that Power Supply no wire does not mean an empty enclosure. The unit should retain the internal power-conversion assembly and recoverable components. Only the external cable harness is absent.

Likewise, a unit should not be upgraded merely because it has a well-known brand, high wattage or premium efficiency certificate. Scrap grading is based on the accepted recycling condition. Conversely, a lesser-known OEM model may receive the same grade price if it satisfies all requirements.

Under the Official Ohata Classification, any power supply that contains its principal internal components, has no complete external output-wire harness, remains reasonably intact, and is free from prohibited damage or contamination may be classified as:

Ohata Power Supply no wire

All accepted brands, models, wattages and compatible form factors that meet this standard are valued according to the Power Supply no wire grade price, rather than being priced individually by retail model. Final classification remains subject to physical inspection, shipment cleanliness, internal completeness and separation from other grades.