# Solder wire UNIPAK Lut miękki S-Sn97Cu3 2.5 mm 100 g - 4514230

**URL:** https://aio.lv/en/product--unipak-4514230--12018466
**Data updated:** 2026-03-11 20:53 (EET)
**Category:** Miscellaneous repair tools
**Manufacturer:** UNIPAK
**Manufacturer code:** 4514230
**EAN:** 5708923451255
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 15.49 €
**Prices and availability valid until:** 2026-07-17 23:59
**Price without VAT (21%):** 12.80 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--unipak-4514230--12018466

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 13.07.2026 | free |
| Pickup points | 16.07.2026 | 1.99 EUR |
| Courier delivery to door | 16.07.2026 | 4.99 EUR |

## Summary description

Soft solder wire UNIPAK Lut miękki S-Sn97Cu3 with 97% tin and 3% copper composition, diameter 2.5 mm and net weight 100 g. Suitable for general soldering tasks on electronic components and metal joints where a lead-free tin-copper alloy is required. Supplied as a single spool for workshop and repair use.

## Long description

UNIPAK soft solder wire S-Sn97Cu3 is a lead-free solder composed of 97% tin and 3% copper, supplied on a single 100 g spool with a 2.5 mm diameter. The tin-copper alloy provides reliable wetting and metallurgical strength for general soldering of electronic components and metal joints where lead-free material is required. The product is intended for workshop, repair and light production tasks that call for a robust soft solder with a relatively large diameter for faster filling of joints.
Advantages
The high tin content ensures good flow and wetting on copper and common electronic finishes, while the copper addition improves joint strength and reduces the risk of brittle intermetallics compared with pure tin. The 2.5 mm diameter allows quicker deposition of solder in larger joints and mechanical connections. Being lead-free, this solder meets lead-restriction requirements for many repair and manufacturing environments. The spool format provides ease of handling and storage for workshop use.
Suitable for
 Soldering copper wires and terminals
 Repairing electrical connections and mechanical joints
 General-purpose electronics and metalwork where lead-free solder is required
 Workshop and field repair tasks requiring faster solder deposition
Key specifications
 Alloy composition: 97% tin, 3% copper
 Product form: soft solder wire on a spool
 Diameter: 2.5 mm
 Net weight: 100 g
 Lead-free alloy suitable for lead-restriction compliance
How to use
Prepare the surfaces by cleaning away oxidation, grease and contaminants to ensure good wetting. Use an appropriate flux compatible with tin-copper alloys if the wire is not rosin-cored. Heat the joint with a soldering iron or torch to the required temperature for the alloy, then apply the solder wire to the heated area so the molten solder flows into the joint. Avoid overheating to prevent damage to components and surroundings. Allow the joint to cool naturally for a reliable metallurgical bond.
Usage recommendations
For electronics and small components, use a temperature-controlled soldering iron with a suitable tip and a flux designed for lead-free tin-copper alloys. For larger mechanical joints, choose a heat source that provides even heating and work in a well-ventilated area. Store the spool in a dry place and keep away from acidic environments that may accelerate corrosion.

## FAQ

### How much does the Solder wire UNIPAK S-Sn97Cu3 2.5 mm 100 g cost, and is it available for purchase?

The price is 15.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 182 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 13.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All UNIPAK products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized UNIPAK service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/12018466/67506969_large.webp