September 7, 2026 Kester NP545 Solder Paste Performance Guide
The Kester NP545 Solder Paste is a zero-halogen, lead-free, no-clean formulation engineered specifically for outstanding process consistency and repeatability in SMT assembly. Manufactured by Kester, this paste provides exceptional stability across demanding production workflows.
12-Month Unrefrigerated Shelf Life and Print Efficiency
One of the key technical advantages of NP545 Solder Paste is its ability to maintain an unrefrigerated shelf life of 12 months without any degradation in print performance or solderability. It consistently delivers reliable paste transfer efficiencies from 0.55 to 0.5 Area Ratio (AR), ensuring uniform aperture release on complex stencils.
Fine Feature Printing and Standards Compliance
Designed for miniaturized assemblies, Kester NP545 Solder Paste is fully capable of printing and reflowing 01005 components in air reflow environments with minimal graping behavior. It is zero-halogen compliant, carrying a flux classification of ROL0 under IPC J-STD-004 and ROM0 under IPC J-STD-004B.
Technical Specifications
| Property | Specification Details |
|---|---|
| Product Type | Zero-Halogen, No-Clean Solder Paste |
| Alloy Metallurgy | Lead-Free (Pb-Free) |
| Storage Stability | 12-Month Unrefrigerated Shelf Life |
| Transfer Efficiency | 0.55 to 0.5 Area Ratio (AR) |
| IPC Flux Classification | ROL0 (IPC J-STD-004) / ROM0 (IPC J-STD-004B) |
| Component Capability | 01005 Components in Air Reflow (Low Graping) |
Conclusion
For electronic manufacturing operations seeking ambient storage stability paired with high-precision 01005 assembly capabilities, Kester NP545 Solder Paste delivers an uncompromised solution. For technical support, datasheets, and purchasing, please Contact – LORIOT INDUSTRIAL.
