MRA403-BH Equivalent & Substitute Parts

Part Overview

The MRA403-BH 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 component is currently listed as obsolete, making identification of functionally equivalent alternatives essential for ongoing maintenance, repair, and legacy system support. The adjustable index stops and non-shorting contact timing provide specific operational characteristics that must be preserved in any substitute selection.

Substiute Parts

MRA403-BH

NKK SwitchesIn Stock: 1002MRA403-BH Datasheet

Current PartRFQ

MRAN403-BH

NKK SwitchesIn Stock: 1007MRAN403-BH Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MRA403-BH is determined by strict equivalence across the following critical parameters:

• Circuit Configuration: Must maintain 4P3T topology to preserve switching logic
• Electrical Ratings: Current rating of 250mA AC and voltage rating of 125VAC must be met or exceeded
• Contact Timing: Non-shorting (BBM) contact sequence must be maintained
• Mounting Interface: Panel mount, through-hole termination with PC pin style
• Mechanical Compatibility: Knob actuator with 30° angle of throw and adjustable index stops
• Environmental Compliance: RoHS3 compliance and REACH unaffected status

The MRAN403-BH has been identified as a manufacturer-recommended substitute based on these parameters.

Parameter Comparison

Engineering Selection Recommendations

The MRAN403-BH is designated as the manufacturer-recommended substitute for the obsolete MRA403-BH. The transition from obsolete to active product status indicates ongoing manufacturer support and availability. Both components are manufactured by NKK Switches, ensuring design continuity within the same product family.

Selection of the MRAN403-BH is supported by its active product status and the manufacturer's explicit recommendation. The component maintains RoHS3 compliance pathway consistent with the original part. Verification of detailed electrical and mechanical specifications with the manufacturer datasheet is necessary prior to implementation in new designs or critical applications.

Frequently Asked Questions (FAQ)

Q: Why is the MRA403-BH listed as obsolete? A: The MRA403-BH has reached end-of-life status with NKK Switches. The MRAN403-BH represents the active product line continuation.

Q: What are the critical parameters for substitution? A: Circuit configuration (4P3T), electrical ratings (250mA AC, 125VAC), contact timing (non-shorting BBM), mounting type (panel mount through-hole), and termination style (PC pin) must be preserved.

Q: Is the MRAN403-BH a direct pin-for-pin replacement? A: The MRAN403-BH is the manufacturer-recommended substitute. Detailed mechanical and electrical specifications should be confirmed against application requirements.

Q: What is the difference between packaging options? A: The MRA403-BH is supplied in standard packaging, while the MRAN403-BH is available in bulk packaging. Packaging does not affect electrical or mechanical performance.

Q: Are both parts RoHS compliant? A: The MRA403-BH is ROHS3 compliant. Compliance status for the MRAN403-BH should be verified with current manufacturer documentation.

Q: Can I use this substitute in existing assemblies? A: The MRAN403-BH is designed as a functional equivalent. Physical fit and electrical performance must be validated for your specific application before implementation.