L77DEF09S D-Sub 9 Position Receptacle Connector

Part Overview

The L77DEF09S is a 9 position D-Sub receptacle connector manufactured by Amphenol ICC (Commercial Products). This connector features female sockets with solder cup termination and is designed for signal applications in free-hanging (in-line) configurations. The part is currently active in production with 912 units in stock. Alternative equivalent parts may be required due to inventory availability, packaging preferences, or specific application voltage requirements.

Substiute Parts

L77DEF09S

Amphenol ICC (Commercial Products)In Stock: 995L77DEF09S Datasheet

Current PartRFQ

DEP09S065TLF

Amphenol ICC (FCI)In Stock: 1147DEP09S065TLF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the L77DEF09S is determined by the following critical parameters that must remain constant:

Mandatory Matching Parameters:

• Connector Type: Receptacle, Female Sockets
• Number of Positions: 9
• Shell Size, Connector Layout: 1 (DE, E)
• Termination Method: Solder Cup
• Mounting Type: Free Hanging (In-Line)
• Number of Rows: 2
• Operating Temperature Range: -55°C to 125°C
• RoHS Compliance: Required

Allowable Variation Parameters:

• Voltage Rating: May exceed 300V (higher ratings are backward compatible)
• Current Rating: Must meet or exceed 7.5A per contact
• Contact Finish Thickness: May vary while maintaining gold plating
• Packaging: May differ (Bag vs. Bulk)
• Shell Material Finish: Steel, Tin Plated (consistent across alternatives)

The DEP09S065TLF meets all mandatory matching criteria and represents a valid equivalent substitute.

Parameter Comparison

Engineering Selection Recommendations

L77DEF09S Selection Criteria:

• Primary choice for applications requiring 300V maximum voltage rating
• Specified when exact contact finish thickness of 8.00µin is required
• Preferred for bag packaging requirements
• Suitable for standard signal-level D-Sub applications

DEP09S065TLF Selection Criteria:

• Applicable when higher voltage tolerance (1000V) is beneficial for system margin
• Suitable for applications where enhanced contact finish thickness (30.0µin) provides extended contact life
• Preferred when bulk packaging is acceptable
• Both parts maintain identical mechanical compatibility and electrical performance at rated specifications

Both parts are active products with full RoHS compliance and unlimited moisture sensitivity rating. Selection between these equivalents depends on packaging format availability and application voltage headroom requirements.

Frequently Asked Questions (FAQ)

Q: Can DEP09S065TLF be used as a direct replacement for L77DEF09S?

A: Yes. Both connectors share identical mechanical dimensions (9 position, shell size 1 DE/E), termination method (solder cup), and operating temperature range (-55°C to 125°C). The DEP09S065TLF provides higher voltage rating (1000V vs. 300V) and thicker gold plating (30.0µin vs. 8.00µin), making it functionally compatible for all applications where L77DEF09S is specified.

Q: What is the difference in contact finish between these parts?

A: L77DEF09S features 8.00µin (0.203µm) gold plating. DEP09S065TLF features 30.0µin (0.76µm) gold plating with GXT™ technology. The thicker plating on DEP09S065TLF provides enhanced durability and contact resistance stability over extended mating cycles.

Q: Are there packaging differences between these equivalents?

A: Yes. L77DEF09S is supplied in bag packaging, while DEP09S065TLF is supplied in bulk packaging. Both contain the same connector component; packaging format selection depends on assembly process requirements and inventory management preferences.

Q: Do both parts meet the same compliance standards?

A: Yes. Both L77DEF09S and DEP09S065TLF are RoHS compliant, rated UL94 V-0 for flammability, and classified as Moisture Sensitivity Level 1 (unlimited shelf life). Both carry ECCN EAR99 and HTSUS 8536.69.8000 classifications.

Q: What is the significance of the higher voltage rating on DEP09S065TLF?

A: The 1000V rating on DEP09S065TLF provides greater electrical safety margin compared to the 300V rating on L77DEF09S. This higher rating does not affect mechanical compatibility or performance in applications operating at or below 300V. Selection of the higher-rated part introduces no disadvantage for standard signal applications.

Q: Are both parts suitable for solder cup termination?

A: Yes. Both L77DEF09S and DEP09S065TLF use solder cup termination exclusively. This termination method is identical across both parts, ensuring equivalent soldering procedures and assembly compatibility.

Q: What is the current rating for each connector?

A: Both connectors are rated for 7.5A. L77DEF09S specifies 7.5A total current, while DEP09S065TLF specifies 7.5A per contact. Both ratings are equivalent for practical application design.