Kester 44 24-6337-0007 Rosin Core Solder 0.015 in
- 63/37 alloy, eutectic, rosin core
- Fine diameter wire
- 30 feet as three 10 foot lengths
- .3 ounce of solder, 2 ounces listed weight
- 361 F melting point (183 C)
- 3.3% flux core, ROM1 per J-STD-004
Last refreshed Sep 28, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A small pack of fine rosin core solder for electronics repair and hobby work. The listing does not name the alloy metals.
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ASIN: B076GHCZZ1Model: 44Category: Solder
Overview
Kester supplies this 44 rosin core solder as a small pack of fine eutectic wire for electronics, from circuit boards and audio gear to connectors and cable work.
Reason to buy is a tidy pack of eutectic wire with flux in the core, aimed at precise work on boards and connectors. The limitation is quantity, a short length that a regular bench will use up quickly.
Who it's for
Students, makers and repair technicians doing occasional bench work get a short length of wire with a flux core. High volume users, or those joining heavy copper pipe, need a larger supply and a different alloy.
Pros and cons
- Eutectic alloy with one melting point
- Flux core inside the wire
- Residue is non-corrosive
- Three short lengths
- Short total length
- Alloy metals not named
Performance notes
Because the alloy is eutectic it melts at a single temperature, so a joint freezes quickly once the iron is removed. Rosin flux in the core removes oxide and helps the solder spread across the pads. The thin wire feeds small amounts, which suits small joints.
Specifications
| Brand | Kester |
|---|---|
| Model | 44 |
| Dimensions & fit | |
| Item weight | 2 ounces |
| Capacity & performance | |
| Melting temperature | 361 F (183 C) |
| Included components | |
| Packaging | Three lengths of 10 feet each |
| Other details | |
| Alloy ratio | 63/37, eutectic |
| Quantity | .3 ounce, 30 feet (9.1 meters) |
| Use | PCB, audio, surface mount, through hole, cable, connector and wire work |
| Flux type | Rosin 44 core, 3.3% |
| Flux classification | ROM1 per J-STD-004 |
Frequently asked questions
Do I need to clean flux residue after using Kester 44?
The listing describes the residue as non-corrosive and non-conductive. It gives no cleaning instruction.
Does Kester 44 solder contain lead?
The listing gives the alloy ratio but does not name the metals or state lead content.
Can Kester 44 solder be used on audio wiring?
Yes, audio is among the uses the description lists, along with PCB, surface mount, through hole and connector work.
Is this Kester 44 pack a full spool?
No. It is thirty feet in three short lengths.