Indium CW-807 Wire Solder 52905-0454 | Leaded 63/37 No-Clean ROL0 | .032" Dia | 1lb Spool

Indium CW-807 Wire Solder 52905-0454 | Leaded 63/37 No-Clean ROL0 | .032" Dia | 1lb Spool

Indium CW-807 (part number 52905-0454) is Indium Corporation’s best-selling flux-cored wire solder — a leaded Sn63/Pb37 (63/37) eutectic formulation with CW-807 no-clean flux core. 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.

Key Specifications

Key Features

• Indium Corporation’s best-selling wire solder — CW-807 is compatible with all Indium no-clean solder pastes and wave fluxes; ideal for mixed-process environments where paste and wire must share flux chemistry
• Halogen-free no-clean flux — ROL0 — <500ppm total halogen; meets J-STD-004B ROL0 and JEITA ET-7304 halogen-free classification; no post-solder cleaning required
• SIR & ECM tested — passes J-STD-004B Surface Insulation Resistance and Electromigration tests; residue is electronically safe for virtually all applications including high-impedance and RF circuits
• 63/37 eutectic alloy — melts at a single point (183°C) with no plastic range; ideal for hand soldering, wave soldering, and applications requiring predictable, crisp joint formation
• Laser and automated soldering compatible — when properly configured, CW-807 yields superior results in laser soldering and automated wire feed systems
• Light-colored, low-smoking flux — reduces smoke and fume generation during soldering; light residue color for easier post-solder inspection

Frequently Asked Questions

What makes CW-807 Indium’s best-selling wire solder?
CW-807’s primary advantage is its cross-compatibility: it works with all Indium no-clean solder pastes and wave fluxes, meaning shops using Indium paste (NC-SMQ92J, 8.9HF, etc.) can use CW-807 wire for hand soldering and rework without introducing a different flux chemistry. This simplifies process control, reduces flux compatibility concerns, and ensures consistent no-clean residue behavior across SMT paste printing, wave soldering, and hand rework operations.

Is the no-clean residue from CW-807 safe to leave on the board?
Yes — CW-807 passes the stringent J-STD-004B SIR (Surface Insulation Resistance) and ECM (Electromigration) tests, confirming the residue is electronically safe for virtually all applications without cleaning. The residue is also light-colored for easy post-solder inspection. For ultra-high-impedance or high-frequency RF applications, contact MTE Solutions to confirm suitability for your specific product.

What is the difference between 63/37 and SAC305 wire solder?
63/37 (Sn63/Pb37) is a leaded eutectic alloy that melts at a single point of 183°C — no plastic (mushy) range. It produces bright, shiny joints and is easier to hand solder than lead-free alloys. SAC305 (Sn96.5/Ag3/Cu0.5) is the primary RoHS-compliant lead-free alloy, melting at approximately 217°C and requiring higher soldering temperatures. If your product is RoHS-exempt or in a leaded process, 63/37 is typically preferred for hand soldering ease and joint appearance.

Is 52905-0454 RoHS compliant?
No — the 52905-0454 contains a leaded Sn63/Pb37 alloy and is not RoHS compliant. It is intended for leaded process environments, RoHS-exempt applications (medical, aerospace, military, industrial), or repair of existing leaded assemblies. For RoHS-compliant applications, see Indium CW-807 SAC305 or SN995 variants.

What diameter and spool options are available for CW-807 63/37?
CW-807 63/37 is available in multiple diameters (.015", .020", .032") and spool sizes (1/4lb and 1lb). This listing is for the .032" diameter, 1lb spool (52905-0454). Contact MTE Solutions at 651-600-3838 to find the right diameter and spool size for your application.