MRA403-BB Equivalent & Substitute Parts

Part Overview

The MRA403-BB 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 contact timing (BBM) configuration with adjustable index stops and a knob actuator. The product is currently obsolete, making identification of compatible substitute parts essential for maintenance, repair, and legacy system support applications.

Substiute Parts

MRA403-BB

NKK SwitchesIn Stock: 1210MRA403-BB Datasheet

Current PartRFQ

MRAN403-BB

NKK SwitchesIn Stock: 774MRAN403-BB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MRA403-BB is determined by strict alignment of the following electrical and mechanical parameters:

Critical Electrical Parameters:

• Circuit configuration (4P3T)
• Current rating (250mA AC minimum)
• Voltage rating (125VAC minimum)
• Contact timing (Non-Shorting/BBM)

Critical Mechanical Parameters:

• Number of positions (2-3)
• Mounting type (Panel Mount, Through Hole)
• Panel cutout diameter (6.35mm)
• Depth behind panel (17.00mm)
• Actuator type (Knob)
• Angle of throw (30°)
• Termination style (PC Pin)

The MRAN403-BB qualifies as a manufacturer-recommended substitute based on compatibility across these defined parameters.

Parameter Comparison

Engineering Selection Recommendations

The MRAN403-BB is the manufacturer-recommended substitute for the obsolete MRA403-BB. Both components are manufactured by NKK Switches and maintain identical electrical specifications (4P3T, 250mA AC, 125VAC) and mechanical form factors (panel mount, through-hole, PC pin termination).

The primary distinction is product status: the MRA403-BB is obsolete, while the MRAN403-BB is active and currently in production. This status difference ensures continued availability and supply chain reliability for new designs and legacy system replacements.

Both parts maintain ROHS3 compliance and equivalent contact material specifications (copper with silver finish), supporting direct substitution in applications requiring the specified electrical and mechanical parameters.

Frequently Asked Questions (FAQ)

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

A: Yes. Both components share identical electrical ratings (4P3T, 250mA AC, 125VAC), contact timing (non-shorting), mechanical mounting configuration (panel mount, through-hole), and termination style (PC pin). The panel cutout diameter (6.35mm) and depth behind panel (17.00mm) are equivalent, enabling direct substitution without mechanical redesign.

Q: What is the primary reason for substitution?

A: The MRA403-BB is obsolete. The MRAN403-BB is the active equivalent from the same manufacturer, ensuring continued component availability and supply chain support.

Q: Are there compliance differences between these parts?

A: No. Both the MRA403-BB and MRAN403-BB are ROHS3 compliant and REACH unaffected, maintaining equivalent environmental and regulatory compliance.

Q: What packaging is available for the MRAN403-BB?

A: The MRAN403-BB is supplied in bulk packaging, consistent with the original MRA403-BB packaging specification.

Q: Are the actuator specifications identical?

A: Yes. Both components feature knob actuators with a 14.30mm length and 30° angle of throw, ensuring mechanical and operational equivalence.