Indium BAROT-06466 - 63/37 Leaded Bar Solder Sn63Pb37 Wave Soldering 25lb Box
Indium BAROT-06466 — 63/37 Eutectic Leaded Bar Solder | Sn63Pb37 | Wave Soldering | 25lb Box
The Indium Corporation BAROT-06466 is a eutectic Sn63Pb37 (63% tin, 37% lead) bar solder for wave, fountain, and dip soldering in electronics manufacturing. As a true eutectic alloy, it melts and solidifies at a single temperature (183°C / 361°F) with no plastic phase — delivering consistent, bright solder joints, fast solidification, and reliable through-hole fill. Manufactured with conflict-free Grade A tin and very low oxide content, meeting ASTM B32, IPC J-STD-006, and JIS Z 3282.
Sold in 25 lb boxes only (15 trapezoidal bars per box).
Specifications
| Part Number / SKU | BAROT-06466 |
|---|---|
| Alloy Composition | Sn63Pb37 (63% Tin, 37% Lead) |
| Alloy Type | Eutectic (single melting point) |
| Melting Point | 183°C (361°F) |
| Bar Shape | Trapezoidal |
| Bars per Box | 15 bars |
| Box Weight | 25 lbs (11.3 kg) |
| Oxide Content | Very low |
| Tin Source | Conflict-free Grade A (ASTM B32) |
| Standards | ASTM B32, IPC J-STD-006, JIS Z 3282 |
| RoHS Status | RoHS exempt (leaded alloy) |
| Origin | Made in USA |
| Manufacturer | Indium Corporation |
Key Features
- True eutectic alloy — single 183°C melt point with no plastic phase; faster solidification and brighter joints vs. near-eutectic alloys like 60/40
- Very low oxide content — minimizes dross formation in the solder pot, reducing waste and pot maintenance frequency
- Conflict-free Grade A tin — ASTM B32 certified, traceable sourcing for compliance documentation
- Trapezoidal bar shape — optimized for efficient loading into wave and fountain solder pots; fits standard pot geometries
- Multi-standard compliance — meets ASTM B32, IPC J-STD-006, and JIS Z 3282 for broad international applicability
- Made in USA — Indium Corporation manufacturing with consistent lot-to-lot quality control
Industries & Applications
- Electronics manufacturing (EMS/OEM/CEM) — wave and fountain soldering of through-hole PCB assemblies
- Aerospace & defense electronics — leaded solder required for high-reliability IPC Class 3 assemblies (RoHS exempt)
- Medical device manufacturing — leaded wave soldering where lead-free alternatives are not approved
- Military electronics — MIL-spec assemblies requiring Sn63Pb37 per program requirements
- Repair and rework — rework and repair of existing leaded assemblies requiring alloy-matching
- Selective and dip soldering — fountain and dip soldering of mixed-technology PCBs
Indium Bar Solder Alloy Comparison
| Part Number | Alloy | Melt Point | RoHS | Best For |
|---|---|---|---|---|
| BAROT-06466 | Sn63Pb37 | 183°C | Exempt | Leaded wave/fountain — this listing |
| BAROT-06458 | SAC305 (Sn96.5Ag3Cu0.5) | 217°C | Compliant | Lead-free wave/fountain soldering |
| BAROT-06759 | SN995 (Sn99.5) | 232°C | Compliant | Lead-free, low-silver alternative |
Frequently Asked Questions
Why is 63/37 the preferred alloy for wave soldering over 60/40?
Sn63Pb37 is a true eutectic alloy — it transitions directly from solid to liquid at exactly 183°C with no plastic (mushy) phase. Sn60Pb40 has a small plastic range (183–188°C) that can cause disturbed joints if the board moves during solidification. The eutectic 63/37 solidifies faster, producing brighter, more consistent joints at production speeds.
Can BAROT-06466 be used in fountain or selective soldering systems?
Yes — BAROT-06466 is suitable for wave, fountain, and dip soldering applications. The trapezoidal bar shape is optimized for easy loading into standard solder pots and efficient melting with minimal splashing.
Is leaded solder still permitted under RoHS?
Yes, for certain applications. Leaded solder remains RoHS-exempt for high-reliability electronics including military, aerospace, and medical applications; for repair and maintenance of existing leaded assemblies; and other applications where lead-free alternatives are not technically suitable or approved. Always verify exemption applicability with your compliance team.
Why does oxide content matter in bar solder?
Low oxide content means less dross formation in the solder pot, cleaner joints, and less material waste. Indium Corporation’s manufacturing process maintains very low oxide levels, reducing pot maintenance frequency, improving joint quality consistency, and lowering total cost of ownership in wave soldering operations.
How many bars are in a 25lb box and what is the bar shape?
Each 25lb box of BAROT-06466 contains 15 trapezoidal bars (approximately 1.67 lbs per bar). The trapezoidal shape fits standard wave and fountain solder pot geometries for efficient loading and melting.
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