A028305 Equivalent & Substitute Parts Reference

Part Overview

The A028305 is a 22MM configurable switch body with keylock actuator manufactured by APEM Inc. as part of the A02 series. This non-illuminated, maintained-type switch component is designed for industrial control applications requiring key-selectable operation. The product is classified as obsolete, necessitating identification of active equivalent components to maintain supply chain continuity and support ongoing system maintenance and new installations.

Substiute Parts

A028305

APEM Inc.In Stock: 761A028305 Datasheet

Current PartRFQ

LBW6K-3A

IDECIn Stock: 1005LBW6K-3A Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the A028305 is determined by strict alignment of the following critical parameters:

• Panel Cutout Dimensions: 22mm nominal round cutout (tolerance range 22mm to 22.3mm acceptable for standard panel mounting)
• Actuator Type: Keylock mechanism for key-selectable operation
• Illumination: Non-illuminated configuration
• Switch Type: Maintained action (latching)
• Regulatory Compliance: ROHS3 compliance and EAR99 classification
• Moisture Sensitivity: MSL 1 rating for unlimited shelf life

The substitute part LBW6K-3A from IDEC meets all critical substitution criteria through matching actuator functionality, panel cutout compatibility, and regulatory certifications.

Parameter Comparison

Engineering Selection Recommendations

The LBW6K-3A serves as a direct functional equivalent to the obsolete A028305. Selection of this substitute is supported by:

• Regulatory Alignment: Both components maintain ROHS3 compliance and EAR99 classification, ensuring no change to supply chain documentation or export requirements
• Environmental Rating: Identical MSL 1 rating confirms equivalent storage and handling requirements
• Active Product Status: The LBW6K-3A is classified as active, ensuring long-term availability and continued manufacturer support
• Panel Integration: The 22.3mm cutout dimension of the LBW6K-3A accommodates standard 22mm panel openings with standard tolerance practices in industrial control panel design
• Functional Equivalence: Matching keylock actuator type, maintained action, and non-illuminated configuration ensure direct operational compatibility in existing control circuits

Frequently Asked Questions (FAQ)

Q: Can the LBW6K-3A be directly installed in place of the A028305?

A: Yes. Both components share identical actuator type (keylock), switch action (maintained), illumination status (non-illuminated), and panel cutout dimensions within standard industrial tolerances. The 0.3mm difference in cutout diameter (22mm vs. 22.3mm) falls within normal panel fabrication tolerances.

Q: What is the significance of the obsolete status of the A028305?

A: Obsolete status indicates that APEM Inc. no longer manufactures or supports this component. The LBW6K-3A, classified as active, provides ongoing availability and manufacturer technical support for equivalent functionality.

Q: Are there any compliance differences between these components?

A: No. Both components are ROHS3 compliant, carry EAR99 classification, and maintain MSL 1 rating. No changes to regulatory documentation or export procedures are required when substituting the LBW6K-3A for the A028305.

Q: Does the packaging difference affect compatibility?

A: No. The A028305 and LBW6K-3A differ only in packaging format (unspecified vs. box). Packaging does not affect the functional or mechanical compatibility of the switch body component itself.

Q: What contact block requirements apply to the LBW6K-3A?

A: The LBW6K-3A, like the A028305, requires separate contact block(s) for circuit completion. Contact block selection must be based on the specific electrical requirements of the application and should reference the LBW series contact block compatibility documentation.