Littelfuse has launched the revolutionary KSC PF series tactile switch, which overcomes the core pain points of electronic encapsulation technology with an extended protective frame patented design. This 6.2 × 6.2 × 5.2mm ultra compact SMT switch achieves complete resin encapsulation protection through structural innovation, providing a reliable touch solution with a lifespan of up to 1 million cycles in extreme environments such as aerospace, medical equipment, and industrial automation.
Core function: Connect the "last millimeter" of electronic protection
Regarding the three major limitations of traditional switches in the encapsulation process:
Insufficient resin coverage: Standard protective frame leads to exposed edges of PCB components
Production yield fluctuation: difficulty in controlling sealing thickness
Risk of vibration failure: mechanical stress transmitted to solder joints
The KSC PF series constructs a triple protection system through an extended
protective frame design:
Deep encapsulation: allows for a 40% increase in resin layer thickness
2. Stress isolation: Buffer the impact of mechanical vibration on solder joints
3. Global protection: synchronous protection switch and surrounding components
Product Model Analysis: Industrial Innovation in Millimeter Space
KSC PF Core Technology Innovation Matrix
| characteristic | technical realization | Industry value |
| Protection architecture | 3.2mm extended protective frame | The sealing depth has been increased to 5mm |
| Environmental tolerance | IP67 certification | -40 ℃~85 ℃ wide temperature operation | Suitable for corrosive gas environment in chemical plants |
Contact system
| Gold plated contacts| 1VA@32VDC Load capacity | Anti oxidation requirements for medical equipment |
| Lifetime guarantee | Mechanical lifespan of 1 million cycles | Reduce the full cycle cost of equipment |
Key Competitiveness: Disruptive Breakthrough in Encapsulation Technology
Revolutionary innovation in production
● 30% increase in sealing yield (resin height tolerance ± 0.5mm → ± 1.2mm)
●SMT mounting accuracy ± 0.15mm, compatible with high-speed surface mount machines
2. Rising protection performance
●Vibration test passed 20G@10-2000Hz （MIL-STD-202）
●Salt spray test>500 hours (ISO 9227)
3. Scene adaptation
● Gull wing/J-shaped bent leg dual terminal options
● 0.6 ± 0.3N ultra soft tactile force, compatible with anti freezing glove operation
Competitor comparison: redefining industrial switch standards
parameter
| KSC PF | Omron B3F-40XX | ALPS SKQG series | Panasonic EVQ series |
| 灌封深度 | 5mm | ≤2.5mm | 3mm | 2.8mm |
| Protective frame height | 3.2mm | 1.5mm | 2.0mm | 1.8mm |
| Mechanical lifespan | 1 million cycles | 500000 cycles | 300000 cycles | and 1 million cycles |
| Terminal options
| Dual architecture | Only gull wing style | Only J-shaped dome feet | Gull wing style |
Technological breakthrough points:
● The only SMT tactile switch that can achieve a sealing depth greater than 3mm
● The height of the protective frame exceeds that of competitors by 100%, synchronously protecting adjacent capacitors/resistors
Application scenario: Electronic guardians in extreme environments
EADS
● Onboard control panel: resistant to freezing at a low temperature of -55 ℃ at an altitude of 10000 meters
● Rocket fuel valve: able to withstand continuous vibration of 20G during the launch phase
mobile medical
● Portable ultrasound equipment: prevent disinfectant from seeping into the circuit board
● Field operating table: resistant to dust and sand environment 500000 times of touch pressure
Industrial Automation
● HMI for construction machinery: IP67 protection against mud splashing
● Petrochemical control terminal: blocks corrosion caused by hydrogen sulfide gas
● Service support: Empowering the entire process of encapsulation technology
Littelfuse provides encapsulation ecosystem support package:
● Process guide: The Resin Compatibility Database covers three types of materials: epoxy/polyurethane/organosilicon
● Simulation tool: ANSYS potting stress cloud map prediction service
● Failure analysis: Switch cutting detection technology locates packaging defects
● Supply and deployment: plug and play protection solution
● Production status: gull wing/J-shaped bent leg dual versions are fully in production
● Packaging specifications: Tape packaging (1400pcs/roll)
● Delivery cycle: Samples delivered within 72 hours, bulk orders delivered within 15 days
Conclusion: Rewriting Electronic Protection Rules with Structural Innovation
When 40% of industrial equipment failures are caused by environmental erosion, the KSC PF series uses millimeter level structural revolution to leverage reliability index level improvements. Its extended protective frame not only solves the century old problem of encapsulation technology, but also marks a new era of electronic protection moving from "passive sealing" to "active compatibility", providing the underlying guarantee for the survival ability of key equipment in extreme scenarios.
