MD S Pushbutton Switch SPST-NO Equivalent & Substitute Parts

Part Overview

The MD S is a through-hole pushbutton switch manufactured by C&K with SPST-NO (Single Pole Single Throw - Normally Open) circuit configuration. Rated for 100mA at 100V AC/DC, this keyswitch features tactile feedback and a black rubber button actuator. The MD S is classified as obsolete product status, making identification of equivalent and substitute parts essential for ongoing design support, maintenance, and component procurement.

Substiute Parts

MD S

C&KIn Stock: 923MD S Datasheet

Current PartRFQ

MDSLFS

C&KIn Stock: 18201MDSLFS Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The MD S (obsolete) has one direct substitute within the C&K MD series: MDSLFS. Substitution eligibility is determined by strict equivalence across the following critical parameters:

• Circuit configuration: SPST-NO
• Current rating: 100mA (AC/DC)
• Voltage rating: 100V AC and 100V DC
• Mounting type: Through Hole
• Termination style: PC Pin
• Switch type: Keyswitch
• Switch function: Off-Mom (Momentary)
• Actuator type: Round, Button, Rubber
• Operating temperature range: -25°C to 70°C
• Electrical life: 1,000,000 Cycles
• Features: Tactile Feedback

The MDSLFS meets all electrical and mechanical parameters required for direct substitution. The primary difference is product status (Active vs. Obsolete) and packaging format (Tray vs. standard packaging), along with improved RoHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

The MDSLFS is the direct substitute for the obsolete MD S pushbutton switch. All electrical and mechanical parameters are identical, ensuring functional equivalence in circuit applications. The MDSLFS offers the additional advantage of Active product status, ensuring continued availability and supply chain support.

The MDSLFS carries ROHS3 compliance certification, whereas the MD S is RoHS non-compliant. For applications subject to RoHS regulatory requirements, the MDSLFS is the appropriate selection. Both parts share identical REACH Unaffected and EAR99 ECCN classifications.

Packaging differences (Tray for MDSLFS versus standard packaging for MD S) do not affect electrical or mechanical performance and are determined by procurement and inventory management requirements.

Frequently Asked Questions (FAQ)

Q: Can MDSLFS directly replace MD S in existing designs? A: Yes. The MDSLFS is electrically and mechanically equivalent to the MD S across all specified parameters including circuit configuration, current and voltage ratings, mounting type, termination style, and operating temperature range.

Q: What is the primary reason to transition from MD S to MDSLFS? A: The MD S is classified as obsolete product status. The MDSLFS is an active product with guaranteed supply chain availability. Additionally, MDSLFS meets ROHS3 compliance requirements.

Q: Are there packaging considerations when substituting MD S with MDSLFS? A: The MDSLFS is supplied in Tray packaging, whereas MD S uses standard packaging. This difference affects procurement and storage but does not impact electrical or mechanical performance.

Q: Do both parts have identical electrical life ratings? A: Yes. Both MD S and MDSLFS are rated for 1,000,000 electrical cycles, ensuring equivalent operational longevity.

Q: Are there compliance differences between MD S and MDSLFS? A: The MDSLFS meets ROHS3 compliance standards, while the MD S is RoHS non-compliant. Both parts share identical REACH Unaffected status and EAR99 ECCN classification.