shop/ consumables/ solder wire 0.3mm 63/37 - ultra-fine

Ultra-fine 0.3mm 63/37 tin-lead solder for SMT work: 0603 passives, fine-pitch ICs, and bodge wires. The skinny gauge gives precise control over how much solder lands on each pad.

63/37 is eutectic, melting at one temperature with no mushy phase between solid and liquid.

Specs

Alloy 63/37 tin-lead (eutectic)
Flux core Rosin
Wire diameter 0.3mm
Melting point Approx. 183°C
Weight 50g (gross)

Feed sparingly; at this gauge a little goes exactly where you point it.

FAQ

Will this ship from Manila?

Yes — all stock ships from our Quezon City warehouse. Order before 4 PM weekdays for same-day cutoff via J&T or LBC.

Do you ship nationwide?

Yes. Metro Manila usually arrives next-day; provincial 1–3 working days.

Can I get this on a school PO or class order?

Yes — we accept Purchase Orders from accredited schools and universities. Contact us with your PO details and we'll process it.

Is this compatible with Arduino, ESP32, or Raspberry Pi?

Most parts work with common maker boards — check the description for specific pinout / voltage notes. If you're unsure, send us a message before ordering.

What's your return policy?

7-day inspection window for DOA units. Email proof of issue and we'll ship a replacement or refund. Used / installed parts are not returnable unless faulty.

Do you offer technical support?

Yes — questions land on our forum or via email, weekday or weekend. We've actually wired up most of what we sell.

Build with this board

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Notes from the bench

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