DF9L-31P-1V(21) Equivalent & Substitute Parts

Part Overview

The DF9L-31P-1V(21) is a 31-position rectangular connector header manufactured by Hirose Electric Co Ltd, designed for surface mount applications with center strip contacts and bottom entry configuration. This component is classified as obsolete, necessitating identification of functionally equivalent alternatives for new designs and ongoing production requirements. The part features tin contact finish and operates under unlimited moisture sensitivity conditions (MSL 1).

Substiute Parts

DF9L-31P-1V(21)

Hirose Electric Co LtdIn Stock: 1011DF9L-31P-1V(21) Datasheet

Current PartRFQ

DF9L-31P-1V(31)

Hirose Electric Co LtdIn Stock: 828DF9L-31P-1V(31) Datasheet

DirectRFQ

DF9A-31P-1V(22)

Hirose Electric Co LtdIn Stock: 1117DF9A-31P-1V(22) Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DF9L-31P-1V(21) is determined by the following critical parameters:

• Number of Positions: 31 (exact match required)
• Pitch: 0.039" (1.00mm) (exact match required)
• Number of Rows: 2 (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Contact Finish: Tin (exact match required)
• Connector Type: Header, Center Strip Contacts (functional equivalence acceptable)
• Height Above Board: 0.126" (3.20mm) nominal (minor variations acceptable within PCB design constraints)

Two substitute parts meet these criteria and are identified as direct functional equivalents within the DF9 series.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: DF9L-31P-1V(31)

The DF9L-31P-1V(31) is the direct functional equivalent within the same DF9L base product line. This part maintains identical electrical and mechanical specifications while offering active product status and RoHS compliance. The transition from the obsolete DF9L-31P-1V(21) to DF9L-31P-1V(31) requires no PCB redesign, as all critical dimensions and contact configurations remain unchanged.

Secondary Substitute: DF9A-31P-1V(22)

The DF9A-31P-1V(22) provides an alternative from the DF9A base product line with active status and RoHS compliance. This part incorporates a board guide feature and operates at a marginally increased height above board (0.130" versus 0.126"). The mated stacking height specification (4.3mm) differs from the primary substitute (2.9mm). This part is available in Tape & Reel packaging, suitable for automated assembly processes. PCB design verification is required to confirm compatibility with the 0.004" (0.10mm) height differential.

Frequently Asked Questions (FAQ)

Q: Can DF9L-31P-1V(31) be used as a direct replacement for DF9L-31P-1V(21)?

A: Yes. Both parts share identical pitch (0.039" / 1.00mm), position count (31), row configuration (2), mounting type (surface mount), contact finish (tin), and height above board (0.126" / 3.20mm). The primary difference is product status and RoHS compliance.

Q: What is the significance of the height above board specification?

A: Height above board determines clearance between the PCB surface and the connector body. The DF9L-31P-1V(31) maintains the original 0.126" (3.20mm) specification. The DF9A-31P-1V(22) operates at 0.130" (3.30mm), a 0.004" (0.10mm) increase. This differential must be evaluated against PCB layout constraints and mating component clearances.

Q: What does the mated stacking height parameter indicate?

A: Mated stacking height specifies the vertical distance when the connector header is mated with its corresponding receptacle. DF9L-31P-1V(31) specifies 2.9mm, while DF9A-31P-1V(22) specifies 4.3mm. This parameter affects overall assembly height and must be considered in enclosure design.

Q: Are there packaging differences between the substitute parts?

A: DF9L-31P-1V(31) packaging is not specified in the provided data. DF9A-31P-1V(22) is supplied in Tape & Reel (TR) format, suitable for pick-and-place assembly. Packaging selection depends on production volume and assembly process requirements.

Q: Does the board guide feature on DF9A-31P-1V(22) affect compatibility?

A: The board guide feature on DF9A-31P-1V(22) provides mechanical alignment assistance during assembly. This feature does not prevent use as a substitute but may require PCB footprint verification to ensure the guide aligns with the board edge or designated guide slot.

Q: Are all three parts RoHS compliant?

A: No. The DF9L-31P-1V(21) is RoHS non-compliant. Both DF9L-31P-1V(31) and DF9A-31P-1V(22) are RoHS compliant. RoHS compliance is mandatory for applications subject to EU Directive 2011/65/EU or equivalent regional regulations.