Indium CW-807 Wire Solder 52915-0454 | SAC305 Lead-Free No-Clean ROL0 | .020" Dia | 1lb Spool

Indium CW-807 Wire Solder 52915-0454 | SAC305 Lead-Free No-Clean ROL0 | .020" Dia | 1lb Spool

Indium CW-807 (part number 52915-0454) is Indium Corporation’s best-selling flux-cored wire solder in a SAC305 (Sn96.5/Ag3/Cu0.5) lead-free formulation, .020" diameter, 1lb spool. CW-807 is compatible with all Indium no-clean solder pastes, wave fluxes, and all common soft solder alloys. It meets J-STD-004B ROL0 classification, contains less than 500ppm total halogen (halogen-free per J-STD-004B and JEITA ET-7304), and passes the stringent SIR and ECM requirements of J-STD-004B — making the no-clean residue electronically safe for virtually all applications without post-solder cleaning. RoHS compliant.

Key Specifications

Key Features

• SAC305 lead-free — RoHS compliant — Sn96.5/Ag3/Cu0.5 is the industry-standard lead-free alloy for RoHS-compliant electronics manufacturing; compatible with all SAC305-based SMT processes
• Halogen-free no-clean flux — ROL0 — <500ppm total halogen; meets J-STD-004B ROL0 and JEITA ET-7304; no post-solder cleaning required
• SIR & ECM tested — residue is electronically safe for virtually all applications including high-impedance and RF circuits
• Compatible with all Indium pastes and wave fluxes — CW-807 shares flux chemistry with Indium SAC305 no-clean SMT pastes for consistent mixed-process performance
• Laser and automated soldering compatible — properly configured CW-807 yields superior results in laser and automated wire feed soldering systems
• Light-colored, low-smoking flux — reduces smoke generation and simplifies post-solder inspection

Frequently Asked Questions

What is SAC305 and why is it the standard lead-free alloy?
SAC305 (Sn96.5/Ag3/Cu0.5 — 96.5% tin, 3% silver, 0.5% copper) became the dominant RoHS-compliant lead-free alloy because of its combination of good wettability, mechanical strength, thermal fatigue resistance, and broad compatibility with standard PCB surface finishes (HASL, ENIG, OSP). It melts at approximately 217°C and requires higher soldering temperatures than leaded 63/37 (183°C). Most lead-free hand soldering stations are set 20–40°C higher when using SAC305 vs. leaded wire.

Is the no-clean residue from CW-807 SAC305 safe to leave on the board?
Yes — CW-807 passes J-STD-004B SIR and ECM tests, confirming the residue is electronically safe without cleaning. The light-colored residue is easy to inspect post-solder.

What temperature should I use for hand soldering with 52915-0454?
SAC305 melts at ~217°C. For hand soldering, tip temperatures of 330–370°C are typical, depending on joint thermal mass, tip geometry, and iron wattage. Higher thermal mass joints (ground planes, large through-hole pads) may require temperatures toward the upper end. JBC’s instant heat-up system and high-wattage cartridges are particularly well-suited to lead-free hand soldering with SAC305.

Can I use 52915-0454 SAC305 wire to rework leaded (63/37) assemblies?
Technically possible but generally not recommended — mixing SAC305 and SnPb alloys creates mixed-alloy joints with unpredictable melting points and mechanical properties. For rework of leaded assemblies, use leaded CW-807 (52905-0454 or 52906-0454). For new lead-free assemblies, use SAC305 throughout.

What other CW-807 SAC305 options are available?
CW-807 SAC305 is available in multiple diameters (.010", .015", .020", .062") and spool sizes (1/4lb and 1lb), with and without MOQ requirements. Contact MTE Solutions at 651-600-3838 for the full SAC305 CW-807 product range.