C&K 210278 Equivalent & Substitute Parts

Part Overview

The C&K 210278 is a pushbutton switch with SPST-NO (Single Pole Single Throw - Normally Open) circuit configuration, rated for 50mA at 100V AC/DC. This keyswitch features a plunger actuator with through-hole PC pin termination and is designed for applications requiring momentary contact switching. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and component procurement.

Substiute Parts

210278

C&KIn Stock: 789210278 Datasheet

Current PartRFQ

MDGLFS

C&KIn Stock: 1056MDGLFS Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the C&K 210278 is determined by strict equivalence across the following critical parameters:

• Circuit configuration: SPST-NO
• Switch function: Off-Mom (momentary contact)
• Current rating: 50mA (AC/DC)
• Voltage rating: 100V AC and 100V DC
• Mounting type: Through Hole
• Termination style: PC Pin
• Operating temperature range: -25°C to 70°C

The C&K MDGLFS meets all mandatory electrical and mechanical compatibility criteria. While the MDGLFS exhibits enhanced electrical life (5,000,000 cycles versus 20,000 cycles) and includes tactile feedback, these represent functional improvements rather than deviations from the core switching specification. The MDGLFS maintains identical voltage, current, circuit topology, and physical mounting characteristics required for direct substitution.

Parameter Comparison

Engineering Selection Recommendations

The C&K MDGLFS is the direct functional equivalent for the obsolete C&K 210278. Both components satisfy identical electrical switching requirements: SPST-NO circuit topology, 50mA current capacity, and 100V AC/DC voltage ratings. Physical compatibility is maintained through matching through-hole mounting and PC pin termination.

The MDGLFS offers two significant advantages for new designs and system updates: active product status ensures ongoing availability and supply chain continuity, and ROHS3 compliance aligns with current environmental and regulatory standards. The extended electrical life specification (5,000,000 cycles) provides enhanced reliability margin for high-cycle applications.

Selection of the MDGLFS eliminates obsolescence risk while maintaining complete electrical and mechanical compatibility with existing circuit designs and PCB layouts.

Frequently Asked Questions (FAQ)

Q: Can the C&K MDGLFS be used as a direct replacement for the C&K 210278 without PCB modifications?

A: Yes. Both components feature identical through-hole PC pin termination and mounting specifications. No PCB layout changes are required for substitution.

Q: What is the primary reason for substituting the 210278?

A: The 210278 is classified as obsolete. The MDGLFS provides an active, currently manufactured equivalent that maintains all electrical and mechanical specifications.

Q: Are there differences in actuator design between these parts?

A: Yes. The 210278 features a plunger actuator, while the MDGLFS uses a round button actuator with rubber material and tactile feedback. Both actuator types are compatible with the same circuit function and electrical ratings.

Q: Does the MDGLFS meet modern compliance requirements?

A: The MDGLFS is ROHS3 compliant, whereas the 210278 is RoHS non-compliant. For applications subject to environmental regulations, the MDGLFS is the appropriate selection.

Q: Is the extended electrical life of the MDGLFS a concern for compatibility?

A: No. Extended electrical life represents improved performance and does not affect functional compatibility. The MDGLFS will operate identically to the 210278 in all specified electrical and mechanical parameters.

Q: What packaging is available for the MDGLFS?

A: The MDGLFS is supplied in tray packaging, compared to the 210278 which used standard packaging. Verify packaging requirements for your procurement process.