Desco 66446 Statfree T2 Plus Dissipative Dual Layer Rubber Mat, 24"X36"X.060", Dark Grey
Desco 66446 — Statfree T2 Plus Dissipative Dual Layer Rubber Mat, Dark Grey, 24" × 36" × .060"
The Desco 66446 Statfree T2 Plus is a dissipative dual layer rubber mat for compact bench ESD worksurface installations. The 24" × 36" format fits standard narrow single-operator bench configurations and inline assembly stations. The two-layer construction delivers a dissipative top surface for safe contact with ESD-sensitive devices and a conductive bottom layer for grounding and ESD monitor compatibility. Mat only — grounding cord and hardware sold separately. Replaces the discontinued Desco 66050. Made in the USA.
Key Specifications
| SKU / Part Number | 66446 |
| Series | Statfree T2 Plus |
| Format | Mat only (grounding hardware not included) |
| Color | Dark Grey |
| Dimensions | 24 in × 36 in × .060 in |
| Top Layer Resistance (Rtt) | Dissipative: 1 × 10⁶ to <1 × 10⁹ Ω |
| Bottom Layer Resistance (Rtt) | Conductive: <1 × 10⁶ Ω |
| Material | Nitrile rubber (oil resistant compound) |
| Compliance | ANSI/ESD S20.20, ANSI/ESD S4.1, RoHS compliant |
| Replaces | Desco 66050 |
| Origin | Made in USA |
Key Features
- Mat Only — Grounding Hardware Not Included: This SKU is the mat only. A grounding cord and common point ground must be purchased separately to put the mat into service as a compliant ESD worksurface. See Desco mat kit SKUs (66425, 66426, 66427) for mat + hardware bundles in the same size range.
- Dissipative Top Layer: Meets ANSI/ESD S20.20 worksurface required limits and ANSI/ESD S4.1 recommendations. Does not generate static charge; controls discharge rate from ESD-sensitive devices on the surface.
- Conductive Bottom Layer: Low-resistance path to ground enables use with ESD workstation continuous monitors and reduces Rtg from top surface to grounding point.
- Nitrile Rubber Oil-Resistant Compound: Resists oil absorption, maintaining electrical and physical properties through service life. Suitable for solder workstations with flux and chemicals.
- UV Stabilizer Additives: Preserves color retention and ESD performance; prevents surface cracking and deterioration over time.
- Laser Engraved Identification: ESD protective symbol, specifications, and manufacturer information on the bottom layer for product identification and EPA auditing.
- Replaces Desco 66050.
- RoHS Compliant. Made in USA.
Frequently Asked Questions
Is the Desco 66446 a direct replacement for the Desco 66050?
Yes. The Desco 66446 Statfree T2 Plus is the suggested replacement for the discontinued Desco 66050. It delivers equivalent dual layer dissipative/conductive rubber mat performance in the same 24" × 36" footprint with the improved nitrile rubber compound and UV stabilizers of the T2 Plus series.
Does the 66446 include grounding hardware?
No. The 66446 is the mat only. You will need a separate mat grounding cord and common point ground to connect the mat to your workstation ground. If you prefer a complete kit with hardware included, see the Desco 66426 (Dark Grey, 24" × 36") or 66425 (Dark Blue, 24" × 36") mat kits.
Why choose a dissipative mat over a conductive mat for bench use?
Dissipative worksurfaces (1×10⁶ to <1×10⁹ Ω) are the preferred choice for bench tops per ANSI/ESD S4.1 because they dissipate charge slowly enough to prevent damaging rapid discharge from ESD-sensitive devices. Conductive materials (<1×10⁶ Ω) are typically reserved for floor mats (ANSI/ESD S7.1).
