Weller EC305 Swiss Cheese Replacement Sponge

Product Description

The WELLER EC305 is a Swiss cheese replacement sponge designed for use with soldering iron stands. The perforated foam construction — the feature that gives it the Swiss cheese name — allows the sponge to clean soldering iron tips effectively by trapping flux residue and oxidation as the tip is wiped across the surface. At 2.5 inches in length and 2.5 inches in width, the EC305 fits standard iron stand sponge wells. The foam material retains moisture well when dampened, which is the correct method for tip cleaning during active soldering work. This is a consumable accessory replaced as part of routine soldering station maintenance.

The EC305 is used in bench soldering applications across electrical, electronics, and HVAC control board work. It seats into compatible Weller iron stands and is swapped out when the sponge degrades or becomes contaminated with excessive flux buildup. Technicians working on low-voltage controls, circuit boards, and wiring harnesses will find this a standard replacement item to keep on hand at the workbench.

Key Features

• Perforated Swiss cheese foam construction for effective tip wiping and flux removal
• 2.5 x 2.5 inch footprint fits standard soldering iron stand sponge wells
• Foam material retains moisture to maintain proper tip-cleaning temperature differential
• Lightweight at 0.03 pounds — easy to stock in quantity
• Direct OEM-style replacement for Weller iron stands

Compatibility

Designed for use with Weller soldering iron stands that accept a standard 2.5 x 2.5 inch replacement sponge insert.

Installation Notes

Installation requires no tools. Remove the worn sponge from the iron stand tray, seat the EC305 replacement into the tray, and dampen it with distilled water before use — do not soak it. Allow excess water to drain before wiping the iron tip. Always ensure the soldering iron is returned to its stand before changing sponges to avoid contact with a live tip.