FX12B-40S-0.4SV(21) Equivalent & Substitute Parts

Part Overview

The FX12B-40S-0.4SV(21) is a 40-position rectangular connector manufactured by Hirose Electric Co Ltd, classified as a position connector within the rectangular connectors category. This part is currently listed as obsolete, which necessitates identification of active equivalent alternatives to maintain supply chain continuity and support ongoing applications requiring this connector interface.

Substiute Parts

FX12B-40S-0.4SV(21)

Hirose Electric Co LtdIn Stock: 795FX12B-40S-0.4SV(21) Datasheet

Current PartRFQ

FX12B-40S-0.4SV

Hirose Electric Co LtdIn Stock: 2049FX12B-40S-0.4SV Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete FX12B-40S-0.4SV(21) is based on the following critical parameters that must remain consistent:

• Base Product Series: FX12 family maintains mechanical and electrical compatibility
• Number of Positions: 40-position configuration
• Pitch Specification: 0.016" (0.40mm) contact spacing
• Connector Type: Receptacle with outer shroud contacts
• Contact Interface: Gold finish for reliable signal transmission

The substitute part FX12B-40S-0.4SV shares the identical base product number (FX12B) and maintains all critical electrical and mechanical parameters, ensuring direct functional equivalence while offering active product status and improved availability.

Parameter Comparison

Engineering Selection Recommendations

The FX12B-40S-0.4SV serves as the direct active equivalent for the obsolete FX12B-40S-0.4SV(21). Selection of this substitute is based on:

• Product Status Alignment: The substitute maintains active manufacturing status, ensuring long-term availability and supply chain reliability
• Regulatory Compliance: RoHS compliance certification of the active substitute meets current environmental and regulatory requirements
• Mechanical Compatibility: Identical pitch, position count, and mounting configuration ensure direct form-fit-function replacement
• Electrical Equivalence: Matching contact finish and connector type preserve signal integrity and mating characteristics

Frequently Asked Questions (FAQ)

Q: Can FX12B-40S-0.4SV directly replace FX12B-40S-0.4SV(21) in existing designs?

A: Yes. Both parts share identical electrical and mechanical specifications including 40-position configuration, 0.016" (0.40mm) pitch, receptacle type with outer shroud contacts, and gold contact finish. The substitute is a direct functional equivalent.

Q: What is the primary difference between the obsolete and active part numbers?

A: The obsolete FX12B-40S-0.4SV(21) is no longer manufactured. The active FX12B-40S-0.4SV provides equivalent functionality with current RoHS compliance certification and unlimited moisture sensitivity rating, supporting modern manufacturing and regulatory requirements.

Q: Are there packaging differences between these parts?

A: The active substitute FX12B-40S-0.4SV is supplied in Tape & Reel (TR) packaging, which is standard for surface mount rectangular connectors and supports automated assembly processes.

Q: Does the substitute meet current environmental standards?

A: Yes. The FX12B-40S-0.4SV is RoHS compliant and carries MSL 1 (Unlimited) rating, meeting current environmental regulations and handling requirements for storage and assembly.