Switchcraft 921K Pushbutton Switch - Equivalent & Substitute Parts

Part Overview

The Switchcraft 921K is a pushbutton switch with SPST-NO (Single Pole Single Throw - Normally Open) circuit configuration, rated for 500mA DC at 30V. This component features a round button actuator with wire lead termination and free hanging mounting type. The 921K is classified as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement continuity.

Substiute Parts

921K

Switchcraft Inc.In Stock: 795921K Datasheet

Current PartRFQ

921KX

Switchcraft Inc.In Stock: 832921KX Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The 921KX qualifies as a direct substitute for the 921K based on identical electrical and mechanical parameters. Substitution is valid when the following criteria are met:

• Circuit configuration remains SPST-NO
• Current rating maintained at 500mA DC
• Voltage rating maintained at 30V DC
• Mounting type remains free hanging
• Actuator type remains round button
• Termination style remains wire leads
• Series designation remains 921

The 921KX is an active production variant within the same 921 series, providing functional and dimensional equivalence to the obsolete 921K.

Parameter Comparison

Engineering Selection Recommendations

The 921KX is the direct active equivalent for the obsolete 921K. Both parts maintain identical electrical specifications (500mA DC, 30V) and mechanical configuration (free hanging, round button, wire leads). The primary distinction is product status and regulatory compliance: the 921KX is in active production and meets ROHS3 requirements, whereas the 921K is obsolete and non-compliant with current RoHS standards.

For new designs or component replacement in existing systems, the 921KX is the appropriate selection. Both parts share the same series designation (921) and circuit topology (SPST-NO), ensuring functional interchangeability within the specified electrical and mechanical parameters.

Frequently Asked Questions (FAQ)

Q: Can the 921KX directly replace the 921K in existing applications?

A: Yes. The 921KX maintains identical electrical ratings (500mA DC, 30V), circuit configuration (SPST-NO), mounting type (free hanging), and termination style (wire leads). No circuit modifications are required.

Q: What is the primary reason to transition from 921K to 921KX?

A: The 921K is obsolete. The 921KX is the active production equivalent within the same 921 series, ensuring continued component availability and supply chain reliability.

Q: Does the packaging difference between 921K and 921KX affect compatibility?

A: No. Packaging format (standard vs. bulk) does not affect electrical or mechanical performance. The difference is procurement and logistics only.

Q: Is the RoHS compliance difference between 921K and 921KX significant?

A: The 921KX meets ROHS3 compliance standards, while the 921K does not. For applications subject to RoHS regulations or environmental compliance requirements, the 921KX is the required selection.

Q: Are there any electrical parameter differences between these parts?

A: No. Both parts are rated for 500mA DC at 30V with identical SPST-NO circuit configuration and wire lead termination.