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DF9-31P-1V(20) Equivalent & Substitute Parts
Part Overview
The DF9-31P-1V(20) is a 31-position rectangular connector header manufactured by Hirose Electric Co Ltd, designed for surface mount applications with center strip contacts and tin plating. This connector is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing design support and component procurement. The part operates within the DF9 series and maintains compatibility with applications requiring dual-row header configurations at 1.00mm pitch spacing.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | DF9-31P-1V(20) |
| Manufacturer | Hirose Electric Co Ltd |
| Category | Rectangular Connectors |
| Series | DF9 |
| Number of Positions | 31 |
| Pitch | 0.039" (1.00mm) |
| Number of Rows | 2 |
| Connector Type | Header, Center Strip Contacts |
| Mounting Type | Surface Mount |
| Contact Finish | Tin |
| Height Above Board | 0.130" (3.30mm) |
| Mated Stacking Heights | 4.3mm |
| Features | Board Guide, Solder Retention |
| Product Status | Obsolete |
| RoHS Status | RoHS non-compliant |
| Moisture Sensitivity Level | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution of the DF9-31P-1V(20) is determined by strict equivalence across the following critical parameters:
- Connector Type & Series: Header with center strip contacts within the DF9 series
- Position Count & Pitch: 31 positions at 0.039" (1.00mm) pitch
- Row Configuration: Dual-row arrangement
- Mounting Technology: Surface mount with board guide and solder retention features
- Contact Material & Finish: Tin-plated contacts
- Physical Dimensions: Height above board of 0.130" (3.30mm) and mated stacking height of 4.3mm
The DF9-31P-1V(32) qualifies as a direct substitute based on identical electrical and mechanical specifications within these parameters. The primary distinction between the main part and its substitute relates to product status and regulatory compliance, not functional or dimensional characteristics.
Parameter Comparison
| Parameter | DF9-31P-1V(20) | DF9-31P-1V(32) |
|---|---|---|
| Manufacturer | Hirose Electric Co Ltd | Hirose Electric Co Ltd |
| Series | DF9 | DF9 |
| Number of Positions | 31 | 31 |
| Pitch | 0.039" (1.00mm) | 0.039" (1.00mm) |
| Number of Rows | 2 | 2 |
| Connector Type | Header, Center Strip Contacts | Header, Center Strip Contacts |
| Mounting Type | Surface Mount | Surface Mount |
| Contact Finish | Tin | Tin |
| Contact Finish Thickness | Not specified | 39.4µin (1.00µm) |
| Height Above Board | 0.130" (3.30mm) | 0.130" (3.30mm) |
| Mated Stacking Heights | 4.3mm | 4.3mm |
| Features | Board Guide, Solder Retention | Board Guide, Solder Retention |
| Product Status | Obsolete | Active |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) | 1 (Unlimited) |
| Packaging | Not specified | Tape & Reel (TR) |
Engineering Selection Recommendations
The DF9-31P-1V(32) serves as the functional equivalent for the obsolete DF9-31P-1V(20). Selection between these parts is determined by regulatory and compliance requirements:
DF9-31P-1V(20): Suitable only for legacy applications or systems where RoHS non-compliance is acceptable and product obsolescence does not impact supply chain continuity.
DF9-31P-1V(32): Recommended for new designs and ongoing production. This part maintains active product status with full ROHS3 compliance, ensuring regulatory alignment and long-term component availability. The specified contact finish thickness of 39.4µin (1.00µm) provides documented plating specifications absent in the main part number.
Both parts share identical electrical and mechanical characteristics, including connector type, position count, pitch, mounting configuration, and physical dimensions. The transition from DF9-31P-1V(20) to DF9-31P-1V(32) requires no circuit redesign or PCB layout modification.
Frequently Asked Questions (FAQ)
Q: Can DF9-31P-1V(32) be used as a direct replacement for DF9-31P-1V(20)?
A: Yes. Both parts are identical in electrical and mechanical specifications, including position count, pitch, mounting type, and physical dimensions. No design changes are required.
Q: What is the significance of the different part number suffixes (20 vs. 32)?
A: The suffix designates the packaging configuration and product lifecycle status. DF9-31P-1V(20) is obsolete, while DF9-31P-1V(32) is active and supplied in Tape & Reel packaging.
Q: Does the RoHS compliance difference affect electrical performance?
A: No. RoHS compliance relates to material composition and environmental regulations, not electrical or mechanical function. Both parts perform identically in circuit applications.
Q: Is the contact finish thickness specification critical for substitution?
A: The DF9-31P-1V(32) specifies contact finish thickness at 39.4µin (1.00µm), while the DF9-31P-1V(20) does not. This documented specification in the substitute part provides additional manufacturing control without altering functional compatibility.
Q: What packaging format is supplied with DF9-31P-1V(32)?
A: DF9-31P-1V(32) is supplied in Tape & Reel (TR) format, suitable for automated assembly processes.
Q: Are there any PCB layout or assembly process changes required when switching to DF9-31P-1V(32)?
A: No. Identical mounting type, pitch, and physical dimensions ensure compatibility with existing PCB designs and assembly procedures.
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