Solder Wire 1mm 500gr Sn60Pb40 Cynel

Solder Wire 1mm 500gr Sn60Pb40 Cynel

The Solder Wire 1mm 500gr Sn60Pb40 Cynel is a soft solder wire built on the classic Sn60Pb40 alloy (60% tin, 40% lead) with five integrated SW26 flux cores. It melts low, at 183–190 °C, flows readily and produces bright, clean joints. In Cyprus this material is commonly called kalai and the soldering iron itself chafkia.

The 1 mm diameter makes it a standard bench solder wire, well suited to through-hole components, wiring, connectors, electrical repairs and school workshops. The 500 g reel covers intensive professional use.

Key features

• Sn60Pb40 alloy: 60% Tin (Sn) / 40% Lead (Pb), to ISO 9453.
• 183–190 °C melting point: predictable behaviour and steady flow at a tip temperature of 300–350 °C.
• Integrated SW26 flux: strips oxides as you solder — no separate paste or liquid flux needed for everyday work.
• 1 mm diameter: 1.0 mm is the classic bench size: it covers the vast majority of PCB and wiring jobs.
• 500 g (0.5 kg) reel: smooth, snag-free feed for intensive professional use.
• Forgiving to work with: the leaded alloy tolerates small temperature swings, which keeps it the first choice for repair, prototyping and training.
• Cynel quality: Polish-made solder wire with consistent flux content along the whole reel.

Where it is used

• Soldering components onto printed circuit boards (PCBs)
• Electronics and electrical repair work
• Arduino, ESP32, Raspberry Pi and other maker projects
• STEM labs and technical school workshops

Which diameter to choose

The rule of thumb is simple: match the wire diameter to the width of the pad or conductor you are soldering. Wire that is too thin forces repeated passes on heavy work; wire that is too thick bridges pads on fine work.

Technical specifications

What's in the box

• 1 × reel of Cynel Sn60Pb40 solder wire
• Wire diameter: 1 mm
• Net alloy weight: 500 g (0.5 kg)
• Flux is inside the wire core — no separate flux container is included

Usage tips

Frequently asked questions

Will it work with the soldering iron I already own?
Yes. Solder wire is a consumable and works with any iron that reaches 300–350 °C. Even a basic 30–40 W iron performs well with this alloy.

Do I need separate flux (paste or liquid)?
For everyday work, no: the SW26 flux is built into five cores inside the wire and is released the moment the alloy melts. Extra flux only helps on oxidised surfaces, during desoldering or for SMD rework.

Do the joints need cleaning afterwards?
SW26 flux residue is classified ROL1 to J-STD-004 and is not corrosive under normal conditions, so it can usually be left in place. If you want a clean look or plan to apply conformal coating, remove it with isopropyl alcohol and a brush.

Why choose leaded solder over lead-free?
Sn60Pb40 melts about 40 degrees lower, flows more easily and gives a shiny joint with less effort. It remains the better choice for repair, prototyping, training and any work where RoHS compliance is not required.

Is it safe to use?
With basic precautions, yes: ventilate or extract fumes, keep food and drink off the bench and wash your hands afterwards. It is not intended for parts in contact with drinking water or food, nor for children's toys, and should be kept away from children.

Does it meet RoHS?
No. It contains 40% lead and is intended for repair, prototyping, training and professional applications that fall outside the directive. For products placed on the EU market, choose lead-free Sn99.3Cu0.7 solder wire instead.

How much solder do I need?
A 100 g reel comfortably covers a hobby project or occasional repairs, 250 g is the regular bench size, while 500 g and 1 kg reels suit service departments and production runs where changing reels costs time.

Supplied by Antoniadis Electronics-Educational Ltd, a supplier of electronic components, tools and STEM educational products. Manufacturer: Cynel Unipress, Poland.