Indium 6.6HF SAC305 Lead-Free Solder Paste 600g | Water-Soluble | PASTEOT-801641-600G
Indium 6.6HF SAC305 Lead-Free Solder Paste 600g | Water-Soluble | PASTEOT-801641-600G
Indium 6.6HF (part number PASTEOT-801641-600G) is a water-soluble SAC305 solder paste for air or nitrogen reflow SMT assembly. This listing specifies Type 4 powder at 88.5% metal loading in a 600g cartridge. The 6.6HF product-family data sheet describes long stencil life, excellent response-to-pause, wetting on a variety of finishes, and low voiding on BGAs, CSPs, and bottom-terminated components. Unlike a no-clean paste, it requires a post-reflow cleaning process.
Minimum order: 5 cartridges (3kg total). Ships overnight only (temperature-sensitive).
Best Uses / Applications
- Lead-free SMT assembly specifying SAC305, Type 4 powder, and 88.5% metal loading.
- Stencil-printing production using 600g cartridge packaging and a validated post-reflow cleaning process.
- High-mix assembly where response-to-pause and stencil life are important process considerations.
- BGA, CSP, QFN, and other bottom-terminated component assembly after application-specific print, reflow, and cleaning validation.
Specifications
| Part Number | PASTEOT-801641-600G |
|---|---|
| Product Line | Indium 6.6HF |
| Alloy | SAC305 (96.5Sn/3.0Ag/0.5Cu), lead-free |
| Flux Type / Classification | Water-soluble / ORH0, per the product-family sheet |
| Powder Type | Type 4 |
| Metal Loading | 88.5%; matches the sheet's SAC305 Type 4 standard offering |
| Reflow Atmosphere | Air or nitrogen |
| Container | 600g cartridge |
| Minimum Order Quantity | 5 cartridges |
| Cleaning | Post-reflow residue removal required; sheet recommends DI-water cleaning |
| Refrigerated Shelf Life | R9 sheet lists a preliminary shelf life of 6 months below 10°C. Follow the supplied lot expiration date and current instructions. |
| Cartridge Storage Orientation | Tip down |
| Shipping Requirement | Overnight only, as required for this listing |
| Manufacturer | Indium Corporation |
Download Indium 6.6HF Technical Data Sheet (PDF)
Key Features
- Response-to-pause: The manufacturer describes print performance suited to production stoppages.
- Low-voiding water-soluble flux: The sheet describes reduced voiding on BGA, CSP, and bottom-terminated components; results depend on the assembly and profile.
- Long stencil life: The R9 sheet lists up to 12 hours at 30–60% RH and 22–28°C, subject to process conditions.
- Air or nitrogen reflow: Supports either atmosphere; nitrogen is preferred for small components in the manufacturer's profile guidance.
- SAC305 Type 4 formulation: 88.5% metal loading for processes specifying this combination.
- Water-soluble residue: Intended for processes incorporating post-reflow cleaning.
Industries & Applications
- Electronics manufacturing: SMT assembly with validated post-reflow cleaning.
- Contract manufacturing: High-mix printing and reflow operations.
- Industrial and high-reliability electronics: Use within the application's approved assembly, cleanliness, and inspection requirements.
- Process development: Evaluation of print, voiding, reflow, and cleaning performance on the actual board.
Water-Soluble vs. No-Clean Process Selection
| Consideration | 6.6HF Water-Soluble | No-Clean Formulation |
|---|---|---|
| Residue handling | Requires post-reflow removal | Residue acceptability must be assessed for the application |
| Process equipment | Validated cleaning, rinsing, and drying process | Depends on cleanliness and downstream process requirements |
| Substitution check | Confirm alloy, powder type, metal loading, and process qualification. Shared packaging or alloy does not establish interchangeability. | |
Storage, Handling & Cleaning
The linked R9 family sheet lists a preliminary six-month shelf life below 10°C. Store cartridges tip down and follow the supplied lot label and current manufacturer instructions. Allow the sealed container to reach ambient working temperature before use; the sheet generally recommends at least two hours out of refrigeration, with actual time varying by container size.
The sheet recommends DI-water cleaning with spray pressure of at least 40psi and water temperature of at least 40°C, noting that parameters depend on board complexity and cleaner efficiency. It states that residues are cleanable up to at least 72 hours after reflow. These are reference guidelines, not universal settings or permission to delay a validated cleaning schedule. Perform electrical testing after residue removal.
Frequently Asked Questions
Does 6.6HF require cleaning after reflow?
Yes. It is water-soluble, not no-clean. Remove flux residues with a validated cleaning process; the manufacturer recommends DI water and states electrical testing should follow residue removal.
What formulation does this listing specify?
PASTEOT-801641-600G is listed as SAC305, Type 4, 88.5% metal loading, in a 600g cartridge. The family sheet independently lists 88.5% for standard SAC305 Type 4 offerings but does not identify this individual distributor SKU.
Can 6.6HF be reflowed in air?
Yes. The sheet lists air or nitrogen. Its profile guidance prefers nitrogen for small components. Validate the atmosphere and thermal profile on the actual assembly.
Does Type 4 powder guarantee suitability at a specific pitch?
No. Stencil geometry, transfer efficiency, print settings, and board design matter. Follow the manufacturer's stencil-design guidance and validate the process instead of relying on a blanket pitch claim.
How should cartridges be stored?
Store refrigerated below 10°C, tip down, following current manufacturer instructions and the lot expiration date. The linked R9 sheet lists a preliminary six-month shelf life; it does not guarantee remaining shelf life at delivery.
How long should paste warm before use?
The sheet generally recommends at least two hours out of refrigeration. Actual warming time varies by container size; verify paste temperature before use and label the container with its opening date and time.
Is this cartridge interchangeable with another 6.6HF SKU?
Not on the basis of the flux-family name alone. Confirm the alloy, powder type, loading, packaging, and approved process before substitution.
What is the minimum order?
This listing requires five 600g cartridges, totaling 3kg. Contact MTE Solutions at 651.600.3838 or sales@mtesolutionsinc.com to confirm availability and lead time.
