Desco 12250 Statfree Conductive Foam High Density, 1/4" x 24" x 36"
Desco 12250 — Statfree Conductive Foam High Density, 1/4" × 24" × 36"
The Desco 12250 Statfree is a conductive high-density cross-linked polyethylene foam sheet for ESD-safe lead insertion packaging. The 1/4" thickness in a 24" × 36" sheet provides a thin, economical profile for standard-length component leads in a larger sheet format. Component leads are inserted directly into the foam to hold them in position during storage, kitting, and transport. The conductive cross-linked construction brings all inserted leads to equipotential, eliminating potential differences between terminals that could cause electrostatic discharge. The foam is corrosion-resistant and will not affect the solderability of device leads over storage life. Low tribocharging formulation minimizes static generation during insertion and extraction. Lead-free RoHS compliant.
Note: This foam sheet weighs approximately 0.50 lb but ships at a dimensional weight of approximately 11 lb due to its size. Shipping costs are calculated on dimensional weight.
Key Specifications
| SKU / Part Number | 12250 |
| Series | Statfree Conductive Foam |
| Dimensions | 1/4 in × 24 in × 36 in (.25 in × 24 in × 36 in) |
| Material | High density cross-linked polyethylene (X-linked) conductive foam |
| ESD Classification | Conductive |
| Tribocharging | Low tribocharging (antistatic formulation) |
| Corrosion Resistance | Corrosion resistant — will not affect solderability of device leads |
| Primary Application | Lead insertion packaging for ICs, connectors, and leaded components |
| Actual Weight | ~0.50 lb (ships at ~11 lb dimensional weight) |
| Compliance | RoHS compliant (lead-free) |
| Vendor | Desco Industries |
Key Features
- 1/4" Thickness in 24" × 36" Format: Thin profile suited for standard-length component leads in a larger sheet size. For the same 1/4" thickness in a slightly smaller 24" × 35" sheet, see the Desco 12660. For greater insertion depth, see the 3/8" (12350), 1/2" (12450), or 3/4" (12550) options.
- Conductive Lead Insertion Foam: Component leads inserted into the foam are brought to equipotential, preventing potential differences between terminals that could cause ESD damage during storage and transport.
- Cross-Linked High Density Construction: Uniform cell structure provides consistent insertion resistance and repeatable lead retention force without deforming leads.
- Corrosion Resistant — Will Not Affect Solderability: Non-corrosive to device leads during storage, preserving solderability for downstream assembly.
- Low Tribocharging (Antistatic): Minimizes static charge generation during lead insertion and extraction.
- 24" × 36" Sheet: Large format for custom cutting to tray inserts, component board liners, or standard packaging configurations.
- RoHS Compliant (Lead-Free).
Frequently Asked Questions
What is the difference between the Desco 12250 and the Desco 12660?
Both are 1/4" thick Statfree conductive high-density cross-linked polyethylene foam with identical material properties, ESD classification, and corrosion resistance. The difference is sheet size: the 12250 is 24" × 36"; the 12660 is 24" × 35". Choose based on which sheet size better fits your tray or packaging cutting requirements.
How does the 12250 compare to other thicknesses in the Statfree conductive foam line?
The Statfree conductive foam line in the 24" × 36" format is available in 1/4" (12250), 3/8" (12350), 1/2" (12450), and 3/4" (12550). The 12250 at 1/4" is the thinnest option — best for short-lead components and thin packaging configurations. Choose a thicker sheet when longer leads or more cushioning depth is required.
Why does this foam ship at a higher weight than its actual weight?
The 12250 sheet is 24" × 36" × 1/4" — a large, low-density item. Carriers calculate shipping cost based on dimensional weight when it exceeds actual weight. This sheet ships at approximately 11 lb dimensional weight despite weighing approximately 0.50 lb, which is reflected in the shipping cost at checkout.
