MRA403 Equivalent & Substitute Parts

Part Overview

The MRA403 is a rotary switch manufactured by NKK Switches, classified as a 2-3 position, 4-pole, 3-throw (4P3T) panel-mount component. It is rated for 250mA AC at 125VAC and features a flatted actuator with adjustable index stops and non-shorting contact timing. The MRA403 is currently listed as obsolete, making identification of equivalent substitute parts essential for ongoing maintenance, repair, and legacy system support. This reference page provides engineering-verified alternatives based on electrical and mechanical compatibility parameters.

Substiute Parts

MRA403

NKK SwitchesIn Stock: 672MRA403 Datasheet

Current PartRFQ

MRAN403

NKK SwitchesIn Stock: 940MRAN403 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MRA403 is determined by the following critical parameters:

• Circuit Configuration: 4P3T topology must be maintained
• Current Rating: 250mA AC minimum
• Voltage Rating: 125VAC minimum
• Contact Timing: Non-shorting (BBM) operation
• Actuator Type: Flatted 3.17mm diameter
• Mounting Type: Panel mount with through-hole termination
• Termination Style: PC pin compatibility
• Contact Material & Finish: Copper with silver finish

The MRAN403, manufactured by NKK Switches, meets all specified electrical and mechanical parameters and is classified as an MFR-recommended substitute. The MRAN403 maintains the same circuit topology, current and voltage ratings, contact characteristics, and mounting configuration as the MRA403, with the distinction that MRAN403 is currently in active production status.

Parameter Comparison

Engineering Selection Recommendations

The MRAN403 is the manufacturer-recommended substitute for the obsolete MRA403. Both components are produced by NKK Switches and share identical electrical specifications, circuit topology, and mechanical mounting characteristics. The primary distinction is product status: the MRA403 is obsolete while the MRAN403 is in active production, ensuring ongoing availability and supply chain continuity.

For applications requiring the MRA403, the MRAN403 provides direct functional equivalence. The MRA403 carries ROHS3 compliance certification; compliance status for the MRAN403 should be verified with the manufacturer if regulatory compliance is a design requirement.

Frequently Asked Questions (FAQ)

Q: Can the MRAN403 directly replace the MRA403 in existing applications?

A: Yes. The MRAN403 maintains identical electrical ratings (250mA AC, 125VAC), circuit configuration (4P3T), contact timing (non-shorting BBM), actuator geometry (flatted 3.17mm), and mounting specifications (panel mount, through-hole PC pins) as the MRA403. Direct substitution is electrically and mechanically compatible.

Q: What is the primary reason for substituting the MRA403?

A: The MRA403 is classified as obsolete. The MRAN403, as an active production part from the same manufacturer, provides continued availability and supply chain support for legacy system maintenance and repair.

Q: Are there packaging differences between MRA403 and MRAN403?

A: The MRA403 packaging specification is not provided in the reference data. The MRAN403 is supplied in bulk packaging. Packaging configuration should be confirmed with the component supplier based on application requirements.

Q: What compliance certifications apply to these parts?

A: The MRA403 is ROHS3 compliant. The MRAN403 compliance status is not specified in the provided data and should be confirmed with NKK Switches if regulatory compliance is required for your application.

Q: Are the actuator and mounting dimensions identical?

A: Yes. Both the MRA403 and MRAN403 feature a flatted actuator of 3.17mm diameter, 10.00mm length, with a 30° angle of throw. Panel cutout dimensions are circular at 6.35mm diameter, and depth behind panel is 17.00mm for both components.