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DF37B-50DP-0.4V(75) Equivalent & Substitute Parts
Part Overview
The DF37B-50DP-0.4V(75) is a 50-position rectangular connector header manufactured by Hirose Electric Co Ltd, designed for surface mount applications with outer shroud contacts and gold plating. This part is classified as obsolete, making identification of suitable substitutes necessary for ongoing production and maintenance applications. The connector features a 0.40mm pitch configuration with dual-row arrangement and solder retention capability.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | DF37B-50DP-0.4V(75) |
| Manufacturer | Hirose Electric Co Ltd |
| Category | Rectangular Connectors |
| Series | DF37 |
| Number of Positions | 50 |
| Pitch | 0.016" (0.40mm) |
| Number of Rows | 2 |
| Connector Type | Header, Outer Shroud Contacts |
| Mounting Type | Surface Mount |
| Contact Finish | Gold |
| Features | Solder Retention |
| Height Above Board | 0.030" (0.75mm) |
| Mated Stacking Heights | 0.98mm |
| RoHS Status | RoHS Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitution for the DF37B-50DP-0.4V(75) is determined by strict equivalence across the following critical parameters:
- Series designation (DF37)
- Position count (50 positions)
- Pitch specification (0.40mm)
- Row configuration (2 rows)
- Connector type (Header, Outer Shroud Contacts)
- Mounting technology (Surface Mount)
- Contact finish material (Gold)
- Solder retention feature
- Mechanical dimensions (Height Above Board: 0.75mm, Mated Stacking Heights: 0.98mm)
- Compliance certifications (RoHS Compliant, MSL 1)
The identified substitute DF37B-50DP-0.4V(51) maintains full electrical and mechanical compatibility with the original part while differing only in contact finish thickness specification, which does not affect functional performance or interchangeability in standard applications.
Parameter Comparison
| Parameter | DF37B-50DP-0.4V(75) | DF37B-50DP-0.4V(51) |
|---|---|---|
| Manufacturer | Hirose Electric Co Ltd | Hirose Electric Co Ltd |
| Series | DF37 | DF37 |
| Number of Positions | 50 | 50 |
| Pitch | 0.016" (0.40mm) | 0.016" (0.40mm) |
| Number of Rows | 2 | 2 |
| Connector Type | Header, Outer Shroud Contacts | Header, Outer Shroud Contacts |
| Mounting Type | Surface Mount | Surface Mount |
| Contact Finish | Gold | Gold |
| Contact Finish Thickness | 4.00µin (0.100µm) | 2.00µin (0.051µm) |
| Features | Solder Retention | Solder Retention |
| Height Above Board | 0.030" (0.75mm) | 0.030" (0.75mm) |
| Mated Stacking Heights | 0.98mm | 0.98mm |
| RoHS Status | RoHS Compliant | RoHS Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) | 1 (Unlimited) |
| Product Status | Obsolete | Active |
| Packaging | Bulk | Tape & Reel (TR) |
Engineering Selection Recommendations
The DF37B-50DP-0.4V(51) is the direct functional equivalent for the obsolete DF37B-50DP-0.4V(75). Both parts maintain identical electrical and mechanical specifications across all critical parameters. The substitute part carries active product status from the manufacturer, ensuring continued availability and supply chain reliability. Both parts satisfy RoHS compliance requirements and carry MSL 1 classification, indicating no moisture sensitivity constraints during storage and handling.
The contact finish thickness difference (4.00µin versus 2.00µin) does not impact electrical performance or mechanical interchangeability. The substitute part is available in Tape & Reel packaging, which is standard for production environments, whereas the original part was supplied in bulk packaging.
Frequently Asked Questions (FAQ)
Q: Can DF37B-50DP-0.4V(51) be used as a direct replacement for DF37B-50DP-0.4V(75)?
A: Yes. Both parts are identical in electrical and mechanical function. They share the same series designation, position count, pitch, row configuration, connector type, mounting technology, and dimensional specifications. The parts are fully interchangeable.
Q: What is the significance of the contact finish thickness difference?
A: Contact finish thickness (4.00µin versus 2.00µin) is a manufacturing specification that does not affect electrical conductivity, signal integrity, or mechanical performance in standard applications. Both thicknesses provide adequate corrosion resistance and contact reliability.
Q: Why is the original part marked as obsolete?
A: Obsolete status indicates the manufacturer has discontinued production. The DF37B-50DP-0.4V(51) substitute maintains active production status, ensuring long-term availability for new designs and replacement applications.
Q: Are there packaging differences between these parts?
A: Yes. The original part DF37B-50DP-0.4V(75) was supplied in bulk packaging, while the substitute DF37B-50DP-0.4V(51) is supplied in Tape & Reel (TR) format. Tape & Reel packaging is standard for automated assembly processes and does not affect component performance.
Q: Do both parts meet the same compliance standards?
A: Yes. Both parts are RoHS Compliant and carry MSL 1 (Unlimited) moisture sensitivity classification. They meet identical regulatory and environmental requirements.
Q: What is the inventory status of the substitute part?
A: The DF37B-50DP-0.4V(51) has 3,990 pieces in stock as new original inventory, providing adequate supply availability for production requirements.
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