MRA403-BA Rotary Switch Equivalent & Substitute Parts

Part Overview

The MRA403-BA is a rotary switch manufactured by NKK Switches, classified as a 2-3 position, 4-pole, 3-throw (4P3T) panel-mount component rated for 250mA AC at 125VAC. This switch features a non-shorting (BBM) contact configuration with adjustable index stops and a circular panel cutout of 6.35mm diameter. The product is currently obsolete, making identification of suitable substitute components essential for maintenance, repair, and legacy system support applications.

Substiute Parts

MRA403-BA

NKK SwitchesIn Stock: 1012MRA403-BA Datasheet

Current PartRFQ

MRAN403-BA

NKK SwitchesIn Stock: 1091MRAN403-BA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MRA403-BA is determined by strict equivalence across the following critical parameters:

• Circuit Configuration: Must maintain 4P3T (4-pole, 3-throw) topology
• Current Rating: Must support minimum 250mA AC
• Voltage Rating: Must support minimum 125VAC
• Contact Timing: Must be non-shorting (BBM) configuration
• Mounting Interface: Must be panel mount with through-hole termination
• Panel Cutout Compatibility: Must accommodate 6.35mm circular cutout
• Actuator Type: Must be knob-actuated
• Termination Style: Must use PC Pin configuration

The MRAN403-BA qualifies as a manufacturer-recommended substitute based on these parameters. While packaging differs (bulk versus box), the electrical and mechanical specifications align with the substitution criteria for this product category.

Parameter Comparison

Engineering Selection Recommendations

The MRAN403-BA is designated as the manufacturer-recommended substitute for the obsolete MRA403-BA. Both components are manufactured by NKK Switches and maintain ROHS3 compliance. The primary distinction is product status: MRA403-BA is obsolete while MRAN403-BA is active, making the latter the appropriate selection for new procurement and ongoing system support.

Selection between these components should be based on inventory availability and application timeline. The MRA403-BA remains available in stock (940 units) for immediate requirements, while the MRAN403-BA (1038 units in stock) represents the active product line for sustained supply.

Frequently Asked Questions (FAQ)

Q: Can MRAN403-BA directly replace MRA403-BA in existing applications?

A: Yes. Both components are manufactured by NKK Switches and share the same base product designation (MRA4 series). The MRAN403-BA is the manufacturer-recommended substitute, indicating functional and mechanical compatibility for panel-mount rotary switch applications.

Q: What is the significance of the packaging difference (Box vs. Bulk)?

A: Packaging type does not affect electrical or mechanical performance. Box packaging typically includes individual component protection and documentation, while bulk packaging reduces per-unit cost for high-volume procurement. Selection depends on application requirements and inventory management practices.

Q: Why is MRA403-BA listed as obsolete?

A: Obsolete status indicates the component is no longer in active production. The manufacturer has transitioned to the MRAN403-BA as the current product offering. For new designs and long-term system support, MRAN403-BA is the recommended selection.

Q: Are both components RoHS compliant?

A: Yes. Both MRA403-BA and MRAN403-BA maintain ROHS3 compliance, meeting environmental and regulatory requirements for electronic component manufacturing and use.

Q: What panel cutout dimensions are required for installation?

A: Both components require a circular panel cutout of 6.35mm diameter for through-hole panel-mount installation. Mechanical compatibility is maintained across the substitution.