AMTECH Solder Paste LF-4300
High-Performance Solder Paste for Precision Electronic Assembly
- Lead-free soldering
- Lead-free solder paste
- Excellent wetting properties
AMTECH Solder Paste LF-4300
Is a lead-free, water-washable solder paste with a REL0 flux classification, trusted by Tier I military and avionic OEMs. It offers excellent print definition at speeds up to 100 mm/sec, with low voiding performance even on LGA components. RoHS II and REACH compliant, LF-4300 is compatible with enclosed print heads and available in both print and dispense grades—making it ideal for high-reliability, precision electronic assembly.
| ALLOY | TEMPERATURE °C | TEMPERATURE °F |
|---|---|---|
| 42Sn/58Bi | 138 | 280 |
| 42Sn/57Bi/1Ag | 138 | 280 |
| 96.5Sn/3.0Ag/0.5Cu | 217–220 | 423–428 |
| 99.0Sn/0.3Ag/0.7Cu | 217–221 | 423–430 |
| 96.5Sn/3.5Ag | 221 | 430 |
| 99.3Sn/0.7Cu | 227 | 441 |
| 95Sn/5Sb | 235–240 | 455–464 |
| 95Sn/5Ag | 221–245 | 430–473 |
| TEST J-STD-004 OR OTHER REQUIREMENTS (AS STATED) | TEST REQUIREMENT | RESULT |
|---|---|---|
| Copper Mirror | IPC-TM-650: 2.3.32 | L: No breakthrough |
| Corrosion | IPC-TM-650: 2.6.15 | L: No corrosion |
| Quantitative Halides | IPC-TM-650: 2.3.28.1 | L: <0.05% |
| Electrochemical Migration | IPC-TM-650: 2.6.14.1 | L: <1 decade drop (no clean) |
|
Surface Insulation Resistance 85°C, 85% RH @ 168 Hours |
IPC-TM-650: 2.6.3.7 | L: ≥100 MΩ (No-clean) |
| Tack Value | IPC-TM-650: 2.4.44 | 37g |
|
Viscosity – Malcom @ 10 RPM / 25°C (x10³ mPa/s) – Sn63/Pb37 T3/T4 |
IPC-TM-650: 2.4.34.4 |
Print: 155–215 Dispensing: 80–115 |
| Visual | IPC-TM-650: 3.4.2.5 | Clear and free from precipitation |
| Conflict Minerals Compliance | Electronic Industry Citizenship Coalition (EICC) | Compliant |
| REACH Compliance | Articles 33 and 67 of regulation (EC) No 1907/2006 | Contains no substance >0.1% w/w that is listed as a SVHC or restricted for use in solder materials |
AMTECH™ solder pastes are advanced, high-performance materials engineered for precise and dependable electronic assembly. Produced in Deep River, Connecticut, USA, these solder pastes are formulated to deliver excellent printability, reliable reflow characteristics, and minimal voiding. Widely used in SMT manufacturing, AMTECH™ solder pastes provide consistent, high-quality solder joints, making them ideal for complex PCB designs and critical applications where reliability and performance matter most.
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- Enables precise, consistent solder deposition for high-density PCB designs
- Supports automated manufacturing with excellent printability and reflow characteristics
- Enhances joint reliability for lead-free applications
- Reduces defects like bridging, voiding, and tombstoning
- Compatible with various application methods including stencil printing and dispensing