L77DD50SAJ3VF D-Sub 50 Position Receptacle Connector Equivalent & Substitute Parts

Part Overview

The L77DD50SAJ3VF is a 50 position D-Sub receptacle connector manufactured by Amphenol ICC (Commercial Products). This connector features female sockets in a right-angle, through-hole solder termination configuration with a DD shell size. The part is currently active in production with 815 units in stock. Alternative equivalent parts may be required due to supply chain considerations, inventory availability, or specific application requirements where substitute connectors meet the same electrical and mechanical specifications.

Substiute Parts

L77DD50SAJ3VF

Amphenol ICC (Commercial Products)In Stock: 834L77DD50SAJ3VF Datasheet

Current PartRFQ

09665526616

HARTINGIn Stock: 98409665526616 Datasheet

SimilarRFQ

DDO50S565MTLF

Amphenol ICC (FCI)In Stock: 652DDO50S565MTLF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the L77DD50SAJ3VF are qualified based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

• Connector type: Receptacle with female sockets
• Position count: 50 positions
• Row configuration: 3 rows
• Shell size: DD (Size 5)
• Mounting style: Through hole, right angle orientation
• Termination method: Solder
• Operating temperature range: -55°C to 125°C
• Flammability rating: UL94 V-0

Secondary Compatibility Factors:

• Current rating: Minimum 5A (substitute parts must support the application's current requirements)
• Voltage rating: Minimum 300V or unspecified (where voltage is not specified, the part is suitable for standard signal applications)
• Backset spacing: Variations in backset spacing (0.319" to 0.409") indicate different mechanical layouts and are noted for PCB design considerations

The two substitute parts listed below meet these core criteria and are therefore electrically and mechanically compatible with the L77DD50SAJ3VF for D-Sub 50 position receptacle applications.

Parameter Comparison

Engineering Selection Recommendations

L77DD50SAJ3VF (Primary Part): This connector is the specified part with the highest current rating (7.5A) and explicit 300V voltage rating. It is RoHS non-compliant and carries an active product status. Selection is appropriate for applications where the original specification is required and RoHS compliance is not mandated.

09665526616 (HARTING Substitute): This connector meets all core D-Sub 50 position receptacle requirements with a current rating of 6.5A. It achieves ROHS3 compliance and is suitable for applications requiring environmental compliance. The backset spacing differs (0.409" vs. 0.319"), requiring PCB layout verification. Contact finish specifications are not provided. This part is appropriate where RoHS3 compliance is required and current requirements do not exceed 6.5A.

DDO50S565MTLF (Amphenol ICC FCI Substitute): This connector is RoHS compliant with a current rating of 5A and gold contact finish (30.0µin thickness). The backset spacing matches the HARTING part (0.409"). This part is appropriate for applications with lower current requirements (≤5A) and where RoHS compliance is necessary. The higher contact finish thickness (30.0µin vs. 8.00µin) provides enhanced durability in high-cycle mating applications.

Selection Basis:

• All three parts share identical connector type, position count, row configuration, shell size, mounting style, termination method, and operating temperature range
• Current rating differences (7.5A, 6.5A, 5A) determine suitability based on application load requirements
• RoHS compliance status differentiates parts for regulated markets
• Backset spacing variations require PCB design confirmation before substitution

Frequently Asked Questions (FAQ)

Q: Can the 09665526616 (HARTING) substitute for the L77DD50SAJ3VF in all applications?

A: The HARTING part is mechanically and electrically compatible for applications requiring ≤6.5A current. The backset spacing differs (0.409" vs. 0.319"), requiring PCB layout verification. If the original PCB is designed for 0.319" spacing, the connector footprint must be re-evaluated. RoHS3 compliance of the HARTING part makes it suitable for regulated applications where the L77DD50SAJ3VF's non-compliant status is problematic.

Q: What is the significance of backset spacing differences?

A: Backset spacing defines the distance from the connector mounting face to the contact insertion point. The L77DD50SAJ3VF uses 0.319" (8.10mm) spacing, while both substitute parts use 0.409" (10.40mm) spacing. This difference affects PCB hole placement and component clearances. Substitution requires PCB design modification or confirmation that the layout accommodates the larger spacing.

Q: Is the DDO50S565MTLF suitable for high-current applications?

A: The DDO50S565MTLF has a 5A current rating, the lowest of the three parts. It is suitable only for applications with current requirements ≤5A. For applications requiring 6.5A or 7.5A, this part is not appropriate.

Q: What does the contact finish thickness difference mean?

A: The L77DD50SAJ3VF has 8.00µin (0.203µm) gold plating, while the DDO50S565MTLF has 30.0µin (0.76µm) gold plating. Thicker plating provides greater resistance to wear during repeated mating cycles and corrosion resistance. The DDO50S565MTLF is more durable in high-cycle applications.

Q: Are all three parts suitable for the -55°C to 125°C temperature range?

A: Yes. All three parts specify an operating temperature range of -55°C to 125°C, making them thermally equivalent for standard industrial and commercial applications within this range.

Q: What is the difference between RoHS non-compliant, ROHS3 compliant, and RoHS compliant status?

A: RoHS non-compliant (L77DD50SAJ3VF) indicates the part does not meet Restriction of Hazardous Substances directives. ROHS3 compliant (09665526616) and RoHS compliant (DDO50S565MTLF) indicate conformance to environmental regulations restricting lead, cadmium, mercury, and other hazardous materials. Selection depends on regulatory requirements of the target market.

Q: Can I use the HARTING 09665526616 if my PCB is designed for the L77DD50SAJ3VF?

A: Direct substitution on an existing PCB designed for the L77DD50SAJ3VF is not recommended without layout verification. The backset spacing difference (0.319" vs. 0.409") may cause misalignment. PCB modification or confirmation that the layout accommodates 0.409" spacing is required before substitution.

Q: Which substitute part should I choose for a new design?

A: Selection depends on three factors: (1) current requirement—choose 09665526616 for ≤6.5A or L77DD50SAJ3VF for ≤7.5A; (2) regulatory compliance—choose 09665526616 or DDO50S565MTLF for RoHS-regulated markets; (3) mating cycle durability—choose DDO50S565MTLF for high-cycle applications due to thicker gold plating. For new designs, RoHS-compliant parts (09665526616 or DDO50S565MTLF) are recommended unless legacy compliance is required.