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tinvoa SAC0307 value lead-free solder paste — 30 g luer-lock syringe
Solder Paste · Value Lead-Free

SAC0307 Low-Silver Lead-Free Solder Paste

Sn 99% (bal.) / Ag 0.3% / Cu 0.7%
217–227°C melt30g / 50gIPC J-STD-005ANo-Clean ROL00.3% Ag · 90% less than SAC305
$14.99/ syringe
$0.50 / gLOW-SILVER VALUE
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Ships from our U.S. warehouse · $4.99 flat shipping · Free on orders of $49.99+ with code FREESHIP at checkout · Shipping & returns

  • Tested using IPC J-STD-005A methods · CoC available per lot
  • RoHS-compatible · REACH SVHC declared · halide-free flux
  • Fresh manufacturing date printed on every syringe and jar
  • 6-month shelf life refrigerated (2–10°C)
Why SAC0307

The budget-friendly SAC305 alternative.

Lower Silver Content

0.3% Ag vs SAC305's 3.0% — meaningful cost savings on bulk runs, with solderability suited to consumer and general-purpose assemblies.

Familiar SAC Profile

Runs on a standard SAC ramp and soak. Liquidus is 227°C (vs 220°C for SAC305), so peak at 240–250°C and hold 60–90 s above 227°C.

IPC J-STD-006C Alloy

Standard SAC0307 (Sn99.0/Ag0.3/Cu0.7) composition — widely used in cost-sensitive consumer electronics.

Halide-Free No-Clean

ROL0-classified flux per IPC J-STD-004B. Non-conductive residue safe to leave on the assembly.

Fresh Date Guarantee

Manufacturing date printed on every syringe and jar — no aged or relabeled inventory.

Technical Specifications

Complete spec sheet.

Per IPC J-STD-004B (flux), IPC J-STD-005A (paste), and IPC J-STD-006C (alloy).

Typical values are not specifications. Lot-specific data available on request.

Alloy CompositionSn 99.0% (bal.) / Ag 0.3 ±0.1% / Cu 0.7 ±0.1%
Solidus / Liquidus217°C / 227°C (mushy zone 10°C)
Alloy Density7.40 g/cm³
Flux TypeNo-Clean Rosin · ROL0 (IPC J-STD-004B)
Halide ContentHalide-free — <0.05% by weight in flux solids (IPC-TM-650 2.3.28.1, ion chromatography)
Powder Particle SizeType 4 · 20–38 μm
Metal Content (wt %)88.0 ± 0.5%
Flux Content (wt %)≈ 12.0%
Viscosity180 ± 30 Pa·s (Malcom PCU-205, 10 rpm, 25°C)
Tackiness30–40 gf (4 h after print)
Slump ResistancePass IPC-TM-650 2.4.35
Package30 g net · resealable luer-lock syringe · SKU TSP-SAC0307-30G
Shelf Life6 months refrigerated (2–10°C) · ≥ 24 h working time
ComplianceRoHS · REACH SVHC declared · Flux ROL0 per IPC J-STD-004B · Paste per IPC J-STD-005A · Alloy per IPC J-STD-006C
Recommended Reflow Profile

A SAC305 profile, tuned for 227°C.

SAC0307 has a wider melt window (10°C mushy zone vs 3°C for SAC305), so profile to the 227°C liquidus and hold 60–90 s above it.

250°C 200°C 150°C 100°C 50°C 0°C 0s 60s 120s 180s 240s 300s 217°C solidus · 227°C liquidus · 10°C mushy zone PREHEAT SOAK REFLOW COOLING Peak 240–250°C
1 · Preheat
25 → 150°C
Ramp 1–2 °C/s · ~60–90 s
2 · Soak
150 → 200°C
Dwell 60–120 s · activates flux
3 · Reflow / Peak
240–250°C peak
Time above 227°C (liquidus): 60–90 s
4 · Cooling
250 → 100°C
Ramp ≤ 4 °C/s · limits thermal shock to components

Always validate on your own thermal-mass test board. Full reflow parameters in the TDS download below ↓.

Safety & Hazard Information

GHS hazard communication.

Lead-free value alloy. Classified under OSHA HazCom (29 CFR 1910.1200). The elements below are reproduced from Safety Data Sheet LSK-SDS-SAC0307 v1.2 (revised 2026-07-21), which is the authoritative classification.

GHS07
Skin sensitizer
Signal word: WARNING

Hazard statement

  • H317 · May cause an allergic skin reaction.

Classification: Skin sensitization — Category 1. This is the only hazard class assigned to the finished paste. The product carries no aquatic-hazard (GHS09) and no health-hazard (GHS08) classification, and is not regulated for transport by DOT, IATA, IMDG or TDG.

Precautionary statements

  • P261 · Avoid breathing dust or fumes.
  • P272 · Contaminated work clothing must not be allowed out of the workplace.
  • P280 · Wear protective gloves.
  • P302+P352 · IF ON SKIN: Wash with plenty of water.
  • P333+P313 · If skin irritation or rash occurs: Get medical advice or attention.
  • P362+P364 · Take off contaminated clothing and wash it before reuse.
  • P501 · Dispose of contents and container in accordance with applicable local, regional, national and international regulations.

Soldering fume — hazard not otherwise classified

Thermal processing generates rosin-based flux decomposition products and metal-oxide fume. Repeated or prolonged inhalation of rosin-based soldering fume may cause occupational asthma in susceptible people. Use effective source-capture local exhaust ventilation during printing, reflow, hand soldering and rework, and keep the operator's head out of the fume plume. The finished paste itself is not classified for respiratory sensitization.

California Proposition 65: no listed chemical is intentionally added to this lead-free formulation (SDS §15). Full classification, exposure limits and first aid in the Safety Data Sheet ↓

Compliance & Documents

Full QA documentation.

Datasheets and compliance documents. A Certificate of Conformance (CoC) ships with every wholesale order.

Technical
Technical Data Sheet (TDS)

Physical, chemical, and electrical specifications with reflow profile and stencil-printing parameters.

View document
Process
Instructions for Use (IFU)

Step-by-step bench guide: opening, warming, stencil printing, dispensing, reflow, and post-reflow inspection. One sheet per pack size.

View 30 g View 50 g
Safety
Safety Data Sheet (SDS)

OSHA/GHS-compliant safety information covering handling, storage, transport, first-aid, and disposal.

Request document
Compliance
RoHS Declaration

Lead-free verification under EU directives 2011/65/EU and 2015/863, .

Request document
Compliance
REACH Compliance Letter

SVHC (Substances of Very High Concern) declaration under EU REACH (EC 1907/2006).

Request document
Quality
Certificate of Conformance (CoC)

Lot-traceable statement of conformance to this product's specification. Issued per lot with wholesale orders.

Request document
FAQ

SAC0307 solder paste — questions.

Can I use SAC0307 instead of SAC305?

For most lead-free work, yes — it carries a tenth of the silver (0.3% vs 3.0%), which lowers metal cost. Two differences matter: the liquidus is 227°C instead of 220°C, and thermal-fatigue resistance is lower — for automotive or harsh-environment work, choose SAC305. Use the same ramp and soak, but peak at 240–250°C (target 245°C) and hold 60–90 s above 227°C. For fine-pitch work that needs Type 5 powder, choose SAC305.

Why does SAC0307 melt over 217–227°C instead of at one temperature?

SAC0307 is a low-silver alloy, not a eutectic. It starts to melt at 217°C (solidus) but is not fully liquid until 227°C (liquidus). Profiles set to 217°C leave partly melted, grainy joints — always profile to the 227°C liquidus.

Which SAC0307 size should I buy?

The 30 g syringe is for hand dispensing and rework — use 20G–22G needles. The 50 g jar is for stencil printing. For pitches under 0.5 mm, choose SAC305 Type 5. Both use the same Type 4 (20–38 µm) paste with no-clean ROL0 flux.

Lower silver,
lower cost per gram.

SAC0307 ships from our U.S. warehouse — $4.99 flat, free on orders of $49.99+ with code FREESHIP. Bulk orders ship with full compliance documentation.

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