# Solder Wire Onnline 250 g SN97CU3 3.0 mm - Onnline

**URL:** https://aio.lv/en/product--onnline-1030003--12048243
**Data updated:** 2026-03-12 19:30 (EET)
**Category:** Tool kits and accessories
**Manufacturer:** Onnline
**Manufacturer code:** 1030003
**EAN:** 5902814349946
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 29.99 €
**Prices and availability valid until:** 2026-07-16 23:59
**Price without VAT (21%):** 24.79 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--onnline-1030003--12048243

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 08.07.2026 | free |
| Pickup points | 13.07.2026 | 1.99 EUR |
| Courier delivery to door | 13.07.2026 | 4.99 EUR |

## Summary description

Flux-cored solder wire Onnline SN97CU3 with 97% tin and 3% copper composition, 3.0 mm diameter and 250 g spool. Designed for general electronic and electrical soldering tasks where a soft, lead-free alloy is required. Suitable for hand soldering, repair work and joining copper and other compatible metals.

## Long description

Flux-cored solder wire Onnline SN97CU3 is a lead-free alloy composed of 97% tin and 3% copper offered on a 250 g spool with a 3.0 mm diameter. It is formulated for general electronic and electrical soldering tasks that require a soft, corrosion-resistant joint with reduced risk of lead contamination. The wire's flux core supports wetting on copper and other compatible metals, making it suitable for hand soldering and repair operations in consumer electronics, electrical assemblies, and simple metal joining.
Advantages
The SN97CU3 composition provides good electrical conductivity and improved mechanical strength compared with pure tin, while remaining lead-free. The flux-cored construction simplifies application by supplying flux exactly where needed, reducing oxidation and improving solder flow. The 3.0 mm diameter is appropriate for medium-to-large joints and general repair tasks, and the 250 g spool size offers a balance between working volume and storage convenience.
Suitable for
Hand soldering of electronic components and wires
Repair and maintenance of consumer electronics and electrical connections
Joining copper parts and compatible metals in workshops and hobby projects
Tasks requiring a lead-free solder alloy with moderate melting and good wetting
Key specifications
Alloy composition: 97% tin, 3% copper
Flux type: flux-cored (activated for soldering use)
Wire diameter: 3.0 mm
Spool weight: 250 g
Designed application: general electronic and electrical soldering, hand soldering, repair work
How to use
Prepare the surfaces by cleaning off oxidation, grease and dirt to ensure proper wetting. Heat the joint with an appropriate soldering iron or torch until the base metals reach soldering temperature, then apply the flux-cored solder wire to the heated area, allowing the alloy to flow and form a fillet. Avoid overheating to preserve flux activity and prevent damage to components. After soldering, clean any residual flux if required by the application or to meet cleanliness standards.
Usage recommendations
Use a soldering iron or heat source compatible with a 3.0 mm wire and select proper tip size and temperature for the metals being joined. For electronic assemblies, use controlled heating and clean flux residues when necessary. Store the spool in a dry environment to maintain flux effectiveness and prevent corrosion of the wire.

## FAQ

### How much does the Onnline SN97CU3 3.0 mm 250 g solder wire cost, and is it available for purchase?

The price is 29.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 38 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 08.07.2026 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 Onnline 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 Onnline 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/12048243/67534641_large.webp