C&K 8121SD9R2GE Pushbutton Switch SPDT Equivalent & Substitute Parts

Part Overview

The C&K 8121SD9R2GE is a pushbutton switch with Single Pole Double Throw (SPDT) configuration, rated for 1A at 120V AC and 28V DC. This component features a standard through-hole, right-angle mounting design with a round plunger actuator and tactile feedback. The part is currently obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and component procurement.

Substiute Parts

8121SD9R2GE

C&KIn Stock: 7368121SD9R2GE Datasheet

Current PartRFQ

8121SD9A2GE

C&KIn Stock: 9848121SD9A2GE Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 8121SD9R2GE is determined by strict equivalence across the following critical parameters:

• Circuit configuration (SPDT)
• Current rating (1A AC/DC)
• Voltage ratings (120V AC, 28V DC)
• Mounting type (Through Hole, Right Angle)
• Actuator type (Round, Plunger)
• Switch function (On-Mom)
• Electrical life (60,000 Cycles)
• Operating temperature range (-30°C to 75°C)
• Termination style (PC Pin)
• RoHS and REACH compliance status

The substitute part 8121SD9A2GE meets all these criteria and belongs to the same C&K 8020 series, differing only in packaging configuration and product status.

Parameter Comparison

Engineering Selection Recommendations

The C&K 8121SD9A2GE is a direct functional equivalent to the obsolete 8121SD9R2GE. Both components share identical electrical specifications, mechanical design, and regulatory compliance certifications. The primary distinction is product status: 8121SD9A2GE is currently in active production, ensuring long-term availability and supply chain continuity.

For applications requiring the 8121SD9R2GE, the 8121SD9A2GE provides full compatibility without design modification. Both parts maintain ROHS3 compliance and REACH compliance status, supporting regulatory requirements across global markets.

Frequently Asked Questions (FAQ)

Q: Can the 8121SD9A2GE directly replace the 8121SD9R2GE in existing designs?

A: Yes. Both parts are electrically and mechanically identical across all specified parameters, including circuit configuration, current and voltage ratings, mounting type, and actuator design. No circuit or PCB modifications are required.

Q: What is the difference between these two part numbers?

A: The primary difference is packaging and product status. The 8121SD9R2GE is obsolete, while the 8121SD9A2GE is actively manufactured and supplied in tray packaging, ensuring consistent availability.

Q: Are there any compliance differences between these parts?

A: No. Both parts maintain identical RoHS3 and REACH compliance status, with the same MSL rating of 1 (Unlimited).

Q: Does the packaging change affect PCB assembly?

A: The packaging format (tray for 8121SD9A2GE) does not affect the component itself or its performance. The through-hole, right-angle mounting configuration and PC pin termination remain unchanged.

Q: What electrical parameters must match for substitution?

A: Critical parameters include SPDT circuit configuration, 1A current rating, 120V AC and 28V DC voltage ratings, 60,000-cycle electrical life, and -30°C to 75°C operating temperature range.