KSC521G ROHS C&K Components, KSC521G ROHS Datasheet - Page 4

• Manufacturer Part Number: KSC521G ROHS
• Description: SWITCH TACT GOLD 160GF GULLWING
• Manufacturer: C&K Components
• Series: KSC5r

Specifications of KSC521G ROHS

• Circuit: SPST-NO
• Switch Function: Off-Mom
• Contact Rating @ Voltage: 0.05A @ 32VDC
• Actuator Type: Standard
• Mounting Type: Surface Mount
• Orientation: Vertical
• Outline: 6.20mm x 6.20mm
• Illumination: Non-Illuminated
• Operating Force: 160gf
• Actuator: Extended
• Contact Current Rating: 50 mAmps
• Contact Form: SPST - NO
• Termination Style: Gull Wing
• Mounting Direction: Vertical
• Body Size: 6.2 mm L x 6.2 mm W x 5.6 mm H
• Mounting Style: SMD/SMT
• Operating Temperature Range: - 40 C to + 85 C
• Contact Rating: 50 mAmps
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 401-1907-2; KSC521GROHS; Y31C21666F PROHS

1. Purpose
C&K components, as design and manufacturing company for micro-miniature tact switches, set up
continuous product improvement to go toward zero defects.
This continuous improvement action leads to implement a major modification on the KSC tact switches
series: anti particle central contact will be placed on the lead frame in order to increase product
robustness to dust or particle contamination. In addition, new injection tooling & methods will allow
better over-molding parameters to improve process stability.
Those modifications will make for our customers a significant reduction of any issue linked to the
particle failure mode.
2. Change definition
2.1
Leadframe
Plastic housing
2.2
C&K
C&K components SAS - 1 rue Louis de la Verne B.P. 359 F-39105 Dole Cedex - FRANCE
Telephone :[phone] - Facsimile: [phone] – www.ck-components.com
Document subject to change without prior notice
Diffusion: no restriction
PCN07-09-KSC Rev.A – 14/11/07
Lead frame modification to include several points of contact between the central contact and the
dome. Other modifications such as terminal position on the plastic housing, ejector location and
Central contact round shape allow, in particle presence, to catch it inside the contact. The radius
size has been calculated according the most common particle size.
Other modifications such as terminal position on the plastic housing.
New mold with new injection parameters location such as ejector, injection pin and parting line.
components
Overview
Illustration
Fig. 2 view with anti-particle central contact
Fig. 1 view with current central contact
Rounded contact with several
contact
trapped or evacuated -presence
sensitive highly reduced
Flat contact with single contact
point
sensitive
Product change notification
–
points
particle
–
presence
particle
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