Polyurethane Self Solderable Wire 155 Class

Product Overview

Copper Polyurethane Self Solderable Wire 155 degree Class is a high-quality magnet wire, the thin wire wound into coils inside electrical and electronic parts. A copper conductor is covered with a polyurethane enamel coating. The enamel keeps the turns of the coil apart, so current flows along the wire and not between the turns.

What sets this wire apart is the coating. Ordinary enamel has to be scraped or burned off before a joint can be made. Polyurethane enamel melts when it meets the heat of a soldering iron or a solder bath, so the copper underneath is ready to bond with solder. The 155 class rating tells you how much heat the enamel can handle in normal working life. It is built for reliable performance in motors, transformers, coils and other electronic components.

Product Specifications

How Self Solderable Copper Winding Wires Work

Self solderable copper winding wires have a coating designed to break down at soldering temperature. When you touch the wire end with a hot soldering iron or dip it in molten solder, the polyurethane melts and clears away. The solder then wets the bare copper and forms the joint.

This means the wire end needs no scraping, no chemical stripping and no separate cleaning step. For a production line, that is one less operation for every joint. For a technician, it is a cleaner and faster job, and it lowers the risk of nicking the copper while removing the enamel.

Key Features

• Direct soldering: solder without stripping the insulation.

• 155 degree class heat rating: dependable insulation at working temperatures up to the class limit.

• Excellent dielectric strength: good electrical insulation between the turns of the coil.

• Moisture resistance: the enamel protects the coil against damp conditions.

• Flexible wire: it bends and winds well, so it suits both manual and automated soldering.

• Fine, even coating: it supports compact, high-density coil windings.

Benefits of Self Solderable Copper Wire

Higher production efficiency. Skipping the stripping step saves time on every joint, which adds up quickly in electronics manufacturing.

Cleaner, more consistent joints. Because the enamel clears away during soldering, there is less handling of the bare copper.

Good fit for small, precise coils. The wire supports compact, high-precision assemblies where space is limited and each joint matters.

Reliable insulation. Strong dielectric strength and moisture resistance protect the coil in daily use.

Lower handling effort. Fewer steps mean less chance of error on the line.

Applications

Our polyurethane self solderable wire is used wherever coil ends must be soldered quickly and neatly:

• Relays and coils: solderable wire for relays and coils of many sizes

• Transformers: small and medium transformers with soldered terminations

• Electric motors: windings that need direct soldered connections

• Electronic components: compact coils and assemblies in electronic equipment

• High-density coil windings: products where space is tight and precision matters

Wire for Direct Soldering Without Stripping

If your line makes thousands of coils a day, a wire for direct soldering without stripping can change your cycle time. There is no scraping tool to keep sharp, no chemical stripper to store and dispose of, and no extra station on the line. The wire goes straight from the winding machine to the soldering step.

Use this wire when your coil ends are soldered, when you want faster production, or when you work with fine wire that is easy to damage during stripping. If your joints are made by crimping or welding instead, a standard enameled grade may be a better match.

Need a Higher Heat Rating?

The Copper Polyurethane Self Solderable Wire 155 Class is made for moderate to high working temperatures. If your coil runs hotter or faces chemicals and overload, you will need a stronger insulation system.

For those jobs, look at our 200 degree class copper winding wire. The Copper Dual Coated PEI PAI Wire 200 Class is a copper dual coated winding wire with two enamel layers for the hottest and toughest conditions. It does not melt away for soldering the way polyurethane does, so choose the grade by what your coil needs most: easy soldering or the highest heat rating. You can compare more options in our range of super enameled copper winding wires.

Quality and Testing

Every spool of Copper Polyurethane Self Solderable Wire goes through checks before it leaves our plant. Our in-house laboratory tests the wire for electrical integrity, mechanical strength and long-term reliability. Our enameled wires are made to IS 13730, IEC 60317 and NEMA MW1000, and our ISO-certified processes keep each batch consistent.

Soldering and Winding Tips

• Use a clean, properly heated soldering iron or solder bath, and keep the contact time steady.

• Let the coating melt away fully before you judge the joint.

• Keep winding tension even so the enamel does not crack or stretch.

• Check that guides and pulleys are smooth and free of sharp edges.

• Inspect finished joints for a bright, even solder surface.

• Run a trial coil when you change wire size or soldering equipment.

Handling and Storage Tips

• Keep spools in a dry, clean place away from moisture and heat.

• Store them away from oil and strong chemicals.

• Avoid dragging the wire over rough or sharp surfaces.

• Do not bend the wire sharply or pull it too hard while winding.

Why Buy from Apple Insulated Wires?

If you are looking for a dependable self solderable wire manufacturer in India, or a polyurethane self solderable wire supplier, here is what you get from us:

• Made to your needs: we can adjust thermal class, insulation type and conductor size.

• Consistent quality: each batch is tested in our own lab.

• Good value for bulk orders: we supply large quantities at competitive prices.

• Delivery in India and abroad: we pack with care and prepare export documents.

• Helpful support: our technical team is ready to answer your questions.

Self Solderable Wire Price and Quote

Self solderable wire price depends on conductor size and quantity. Share what you need, and our team will reply with the right option. Call us on +91 9624471888, or write to info@applewires.com.