Is this this the correct sodder to use when working on circuit boards

I use it for wiring small switches on my model railway. It's fairly thin so doesn't take many seconds to melt. I would think it's OK for soldering components on a circuit board.

do you still need to use flux with this?

Hello dear friend, this does not need a flux, direct use of fire can be.

can i use this to repair a sterling silver ring?

I think the binding force on soldering is too weak for ring. This is usually for electronic components assembly.

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Solder Wire,0.8mm Soldering Wire Lead Free Sn99.3 Cu0.7 with Rosin Core for Electronic Electrical Soldering Components Repair and DIY. (20, Grams) Net 15g

Solder Wire,0.8mm Soldering Wire Lead Free Sn99.3 Cu0.7 with Rosin Core for Electronic Electrical Soldering Components Repair and DIY. (20, Grams) Net 15g

Product ID: 451212314

⚡0.8mm precision diameter

🔥Melting point 185-190°C

🛠️Lead-free Sn99.3 Cu0.7 alloy

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Description

🛠️ Solder smarter, not harder—join the pro repair revolution!

COMPACT PORTABLE - Lightweight 20g spool fits in your pocket—ready for on-the-go fixes
EFFORTLESS MELTING - Optimal melting point (185-190°C) for smooth, quick joints with minimal slag
PRECISION PERFECTED - 0.8mm diameter for flawless, detailed soldering every time
ECO SAFE LEAD FREE - Sn99.3 Cu0.7 alloy ensures safe, reliable, and sustainable repairs
ROSIN CORE ADVANTAGE - Built-in flux boosts fluidity and strong adhesion—no post-cleaning hassle

This 0.8mm lead-free solder wire features a high-purity Sn99.3 Cu0.7 alloy with a rosin core flux, delivering superior electrical and thermal conductivity. Designed for precision and ease, it melts cleanly at 185-190°C, producing strong, bright joints with minimal slag. Compact and portable, it’s ideal for professional-grade repairs on electronics, household appliances, and DIY projects, ensuring safe, efficient, and reliable soldering every time.

Specifications

ASIN	B0B3D8NLMB
Batteries Required?	No
Best Sellers Rank	13,694 in DIY & Tools ( See Top 100 in DIY & Tools ) 10 in Solder
Colour	20 G
Customer Reviews	4.5 4.5 out of 5 stars (1,860)
Date First Available	7 Jun. 2022
Guaranteed software updates until	unknown
Included Components	solder wire
Item Weight	20 g
Item model number	SW003
Manufacturer	Sumwitum-UK
Package Dimensions	10.7 x 9.6 x 2.5 cm; 20 g
Part Number	SW003
Power Source	ac

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