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tinvoa Sn63/Pb37 30g leaded solder paste syringe — Sn63/Pb37 eutectic, 183°C melt, Type 4 powder, No-Clean ROL0 flux, contains lead (Pb), California Prop 65 warning
Solder Paste · Leaded Eutectic · B2B Only

Sn63 / Pb37 Leaded Solder Paste

Sn 63% / Pb 37% · Tin-Lead Eutectic
183°C eutectic30g / 50g syringeIPC J-STD-005ANo-Clean ROL0Hand-rework standard
Wholesale Only · Prop 65 Warning
Contains lead (Pb). Sold through wholesale only with full SDS, Prop 65 labeling, and CoC. Only for applications outside EU RoHS scope (e.g., military, aerospace) or covered by a specific RoHS exemption.
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  • 183°C true eutectic — sharp transition, no mushy zone
  • Ground Shipping Friendly*
  • California Prop 65 lead warning required
  • Tested using IPC J-STD-005A methods · CoC per lot

*DOT ground transport is generally not regulated for retail quantities. Air and ocean shipments should be reviewed against the current SDS and applicable regulations.

Technical Specifications

Engineering data sheet.

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

Alloy CompositionSn 63% / Pb 37% (eutectic)
Melting Point (Eutectic)183°C · solidus = liquidus (no mushy zone)
Alloy Density8.40 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 %)≈ 89% (typical)
Viscosity (Malcom PCU, 10 rpm, 25°C)180–220 Pa·s (typical)
Tackiness30–40 gf (4 h after print)
Slump ResistancePass IPC-TM-650 2.4.35
Solder Ball TestPass IPC J-STD-005A
Recommended Stencil0.10–0.15 mm (4–6 mil) · area ratio ≥ 0.66
Package30 g / 50 g · resealable luer-lock syringe · SKU TSP-PB37-30G / TSP-PB37-50G
Shelf Life6 months refrigerated (2–10°C) · ≥ 24 h working time
GHS ClassificationH360FD · H372 · H362 · H410 · DANGER
Prop 65 WarningRequired — contains LEAD (Pb)
TransportationDOT Ground: Typically Non-Regulated
Air/Ocean: Verify SDS Section 14
Recommended Reflow Profile

Wide window, clean joints.

Sn63/Pb37's true eutectic gives a forgiving process window — a short soak activates the flux, then a brief time above 183°C forms the joint. A lower peak than lead-free is gentler on heat-sensitive parts.

250°C 200°C 150°C 100°C 50°C 0°C 0s 60s 120s 180s 240s 300s 183°C eutectic (no mushy zone) PREHEAT SOAK REFLOW COOLING Peak 220°C
1 · Preheat
25 → 100°C
Ramp 1–2 °C/s · ~60 s
2 · Soak
100 → 150°C
Dwell 60–90 s · activates flux
3 · Reflow / Peak
200–225°C peak (typ. 220°C)
Time above 183°C (TAL): 60–90 s
4 · Cooling
220 → 100°C
Ramp ≤ 4 °C/s

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

Shipping & Handling

What B2B buyers need to know.

Shipping

  • DOT ground: typically non-regulated in retail quantities
  • Contains lead (H410) — air/ocean may classify as UN3077, Class 9
  • SDS + Prop 65 labels + CoC included with every order

Transport classification may vary by package size, destination and mode of transport. Refer to the latest SDS Section 14 before shipment.

Safety & Hazard Information

GHS hazard communication.

Leaded eutectic alloy. Classified under OSHA HazCom 2024 (GHS). Refer to the product SDS for the complete, authoritative classification.

GHS07
Irritant / Sensitizer
GHS08
Health Hazard
GHS09
Environment
Signal word: DANGER

Hazard statements

  • H360FD · May damage fertility or the unborn child.
  • H372 · Causes damage to organs through prolonged or repeated exposure (lead).
  • H362 · May cause harm to breast-fed children.
  • H410 · Very toxic to aquatic life with long lasting effects.
  • H317 · May cause an allergic skin reaction (flux).

Precautionary statements

  • P201 · Obtain special instructions before use.
  • P260 · Do not breathe dust or fumes.
  • P263 · Avoid contact during pregnancy and while nursing.
  • P264 · Wash hands thoroughly after handling.
  • P270 · Do not eat, drink or smoke when using this product.
  • P272 · Contaminated work clothing must not be allowed out of the workplace.
  • P273 · Avoid release to the environment.
  • P280 · Wear protective gloves and eye protection.
  • P302+P352 · IF ON SKIN: Wash with plenty of water.
  • P308+P313 · IF exposed or concerned: Get medical advice or attention.
  • P333+P313 · If skin irritation or rash occurs: Get medical advice or attention.
  • P391 · Collect spillage.
  • P501 · Dispose of contents and container in accordance with applicable local, regional, national and international regulations.
California Proposition 65 — WARNING

This product can expose you to lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Full classification in the Safety Data Sheet ↓

Compliance & Documents

Full B2B paperwork.

Because this is a leaded product, documentation is provided directly on inquiry so we can confirm your application and destination. SDS, Prop 65 label artwork and Certificate of Conformance (CoC) ship with every order.

Technical
Technical Data Sheet (TDS)

Alloy composition (Sn63/Pb37), physical, chemical, and reflow specifications. Includes printing parameters and IPC J-STD references.

View document
Process
Instructions for Use (IFU)

Step-by-step bench guide for handling leaded paste: warming, stencil printing, reflow at ~220 °C peak, post-reflow cleanup.

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

Full GHS classification for leaded paste. Lead-exposure handling, first-aid, transport, and disposal protocols.

Request document
Compliance
RoHS Statement

Lead-exemption status under EU directives 2011/65/EU and 2015/863 — for applications outside EU RoHS scope (e.g., military, aerospace) or covered by a specific RoHS exemption.

Request document
Compliance
REACH Compliance Letter

SVHC declaration under EU REACH (EC 1907/2006). Lead is a listed Substance of Very High Concern.

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

Sn63/Pb37 leaded paste — questions.

Can I buy Sn63/Pb37 solder paste on Amazon?

No. Our Sn63/Pb37 is sold through wholesale only, for leaded processes in applications outside EU RoHS scope (such as military and aerospace) or covered by a specific RoHS exemption. Every order ships with the SDS, California Prop 65 lead warning labels and a Certificate of Conformance per lot. Request a wholesale quote.

Why use Sn63/Pb37 instead of lead-free paste?

It is a true eutectic: it melts sharply at 183°C with no pasty range, so it reflows at a 200–225°C peak (typical 220°C) — about 20–25°C cooler than SAC305 — with 60–90 s above 183°C. It wets easily and is forgiving in rework. Use it only where leaded solder is permitted.

How is Sn63/Pb37 solder paste shipped?

It is typically non-regulated for DOT ground shipping. For air and ocean freight, transport status must be confirmed against Section 14 of the SDS. All leaded orders carry Prop 65 labeling and the SDS.

Specifying Sn63/Pb37 for your
RoHS-exempt build?

Wholesale only. MOQ 100 syringes. SDS, Prop 65 labels, and CoC included. 24-hour quote response.

Request wholesale quote