Equivalent & Substitute Parts for L777DEF09P

Part Overview

The L777DEF09P is a 9-position D-Sub plug connector manufactured by Amphenol ICC (Commercial Products). This male pins connector features solder cup termination and is designed for free hanging (in-line) mounting applications. The part is currently in active production status with 855 units in stock.

D-Sub connectors of this configuration are widely used in industrial control systems, data acquisition equipment, and legacy electronic assemblies. Substitute parts become necessary when the original manufacturer discontinues production, when alternative sourcing is required for supply chain optimization, or when specific performance characteristics of alternative designs better suit application requirements.

Substiute Parts

L777DEF09P

Amphenol ICC (Commercial Products)In Stock: 922L777DEF09P Datasheet

Current PartRFQ

172-009-102R031

NorComp Inc.In Stock: 3787172-009-102R031 Datasheet

SimilarRFQ

DEP09P065TXLF

Amphenol ICC (FCI)In Stock: 1633DEP09P065TXLF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for D-Sub connectors is determined by strict alignment of the following parameters:

Critical Matching Parameters:

• Connector type (Plug with Male Pins)
• Number of positions (9)
• Shell size and layout (Size 1, DE/E configuration)
• Termination method (Solder Cup)
• Mounting interface compatibility

Performance Parameters:

• Current rating must equal or exceed the original specification
• Voltage rating must equal or exceed the original specification
• Operating temperature range must encompass or match the original range
• Contact finish material and plating thickness affect signal integrity and environmental resistance

Compliance Parameters:

• RoHS compliance status
• Material flammability rating (UL94 V-0)
• Regulatory classification (ECCN, HTSUS codes)

The substitute parts identified below meet the core functional requirements of the L777DEF09P while presenting variations in mounting type, current rating, voltage rating, and product status that must be evaluated for specific application contexts.

Parameter Comparison

Engineering Selection Recommendations

DEP09P065TXLF (Amphenol ICC / FCI)

This part is functionally equivalent to the L777DEF09P for applications requiring free hanging (in-line) mounting. Both parts share identical mounting type, position count, shell size, and operating temperature range. The DEP09P065TXLF provides enhanced performance characteristics: higher voltage rating (1000V versus 300V) and thicker gold plating (30.0µin versus 20.0µin), which extends contact durability in high-cycle mating environments. Both parts maintain active production status and full RoHS compliance. The DEP09P065TXLF is suitable for direct substitution in new designs and retrofit applications where the enhanced voltage rating and contact durability provide system-level benefits.

172-009-102R031 (NorComp Inc.)

This part shares the core D-Sub configuration (9 positions, Size 1, solder cup termination) but differs in mounting type (panel mount versus free hanging) and performance specifications. The current rating is reduced to 5A compared to the L777DEF09P specification of 7.5A. The operating temperature range is narrower (-50°C to 100°C versus -55°C to 125°C). The product status is obsolete, indicating discontinued manufacturing. This part is not recommended for new designs. Substitution is limited to legacy system maintenance where panel mount configuration is required and the reduced current and temperature ratings are acceptable for the specific application.

Frequently Asked Questions (FAQ)

Q: Can DEP09P065TXLF be used as a direct replacement for L777DEF09P in existing assemblies?

A: Yes. Both connectors share identical mounting type (free hanging in-line), position count (9), shell size (1 DE/E), and termination method (solder cup). The DEP09P065TXLF provides equal or superior electrical performance with higher voltage rating and thicker gold plating. Both parts are RoHS compliant and maintain active production status.

Q: What is the primary limitation of 172-009-102R031 as a substitute?

A: The 172-009-102R031 features panel mount configuration, which is mechanically incompatible with free hanging (in-line) applications. Additionally, the current rating (5A) is lower than the L777DEF09P (7.5A), and the operating temperature range is narrower. The product is obsolete, limiting long-term availability.

Q: How do contact finish specifications affect connector selection?

A: Contact finish thickness and composition determine signal integrity, corrosion resistance, and contact durability. The L777DEF09P specifies 20.0µin gold plating, while DEP09P065TXLF provides 30.0µin with GXT™ enhancement. Thicker plating extends connector life in high-cycle mating applications. The 172-009-102R031 specifies flash gold plating, which provides minimal thickness and is suitable only for low-cycle applications.

Q: Are all three parts RoHS compliant?

A: Yes. The L777DEF09P and DEP09P065TXLF are RoHS Compliant. The 172-009-102R031 is ROHS3 Compliant. All three parts meet current regulatory requirements for hazardous substance restrictions.

Q: What voltage rating should be considered for system design?

A: The L777DEF09P is rated for 300V. The DEP09P065TXLF is rated for 1000V, providing higher safety margin in high-voltage applications. The 172-009-102R031 does not specify a voltage rating. System design should verify that the selected connector voltage rating exceeds the maximum operating voltage by appropriate safety margin.

Q: Can 172-009-102R031 be used in applications requiring the full -55°C to 125°C temperature range?

A: No. The 172-009-102R031 is rated for -50°C to 100°C, which does not encompass the full temperature range of the L777DEF09P. Applications requiring operation at -55°C or above 100°C must use L777DEF09P or DEP09P065TXLF.