Memtron’s Posi-Tac II Construction is a widely established, flexible and reliable tactile technology. This cost-effective production is utilized in the majority of our tactile switch applications due to its appeal across many environments and operation conditions.The construction performs well in situations where abuse, harsh environmental conditions and errant electrical charges are inherent. The switching elements are encapsulated within layers of polyester and acrylic-based adhesives to optimize necessary performance requirements.

Posi-Tac II is conducive to several different stainless steel dome configurations, shielding options and value-added capabilities, such as backlighting. This functionality makes it ideally suited for most Memtron customers implementing polyester membrane switches.

Attributes

• Actuation forces from 8 to 30 ounces depending on dome size and spacer configuration
• Typical actuation forces are 15 +/- 3 ounces
• 2,000,000 actuation life expectancy
• Highly effective in applications with dense key populations, or with tactile and non-tactile key in combination
• Eliminates possibility of false entry since all domes are placed in direct contact with circuitry
• Can incorporate interchangeable legends over keys as a well as non-key areas
• Operating temperature range of –20 to +70 C and storage temperature range of –40 to +85 C
• Conducive to adding embedded LEDs
• Easily incorporates ESD, RFI, EMI shielding without additional material layers
• Can be environmentally sealed, performs well in harsh environments
• Conducive to ring or perimeter embossing
• Suitable for Polyester, Polycarbonate, and Elastomeric overlay