L777DFE09POL2 D-Sub 9-Position Plug Connector: Equivalent & Substitute Parts

Part Overview

The L777DFE09POL2 is a 9-position D-Sub plug connector manufactured by Amphenol ICC, featuring panel mount through-hole solder termination. This connector is classified as a D-shaped connector with male pins, designed for signal applications in industrial and commercial equipment. The part maintains active product status with 666 units in current inventory.

Substitute parts are identified when equivalent electrical and mechanical parameters align with the main part specifications, enabling direct functional replacement in applications where the original part becomes unavailable, reaches end-of-life, or when alternative sourcing is required for supply chain optimization.

Key Parameters

Parameter	L777DFE09POL2 Specification
Connector Type	D-Sub Plug, Male Pins
Number of Positions	9
Shell Size / Layout	1 (DE, E)
Mounting Type	Panel Mount, Through Hole
Termination Method	Solder
Shell Material / Finish	Steel, Tin Plated
Contact Finish	Gold (30.0µin / 0.76µm)
Current Rating	7.5A
Voltage Rating	300V
Operating Temperature Range	-55°C to 125°C
Flammability Rating	UL94 V-0
RoHS Status	RoHS Compliant
Contact Material	Brass
Dielectric Material	Thermoplastic, Glass Filled

Substitute Part Grouping Explanation

Substitute parts for the L777DFE09POL2 are classified based on strict alignment with the following critical parameters:

Primary Substitution Criteria:

Connector type: D-Sub plug with male pins
Position count: 9 positions
Shell size and layout: 1 (DE, E)
Termination method: Solder
Flammability rating: UL94 V-0
Contact material: Brass or Phosphor Bronze
Dielectric material: Thermoplastic or Glass-Filled variants

Secondary Compatibility Factors:

Mounting configuration: Panel mount through-hole or through-hole vertical
Shell material: Steel with tin or nickel plating
Contact finish: Gold plating (thickness variations acceptable)
Operating temperature range: Minimum -55°C to 125°C or compatible subset
Current rating: Equal to or exceeding 7.5A (or 6A minimum for signal applications)
Voltage rating: Equal to or exceeding 300V (or 125V minimum for signal applications)

Substitution Limitations: Parts with obsolete product status, non-compliant RoHS designations, or significantly reduced current/voltage ratings are identified but noted for application-specific evaluation. Mounting type variations (panel mount versus through-hole vertical) are documented as design considerations requiring mechanical verification.

Parameter Comparison

Part Number	Manufacturer	Connector Type	Positions	Shell Size	Mounting Type	Termination	Current (A)	Voltage (V)	Temp Range (°C)	Contact Material	RoHS Status	Product Status
L777DFE09POL2	Amphenol ICC	D-Sub Plug, Male	9	1 (DE, E)	Panel Mount, Through Hole	Solder	7.5	300	-55 to 125	Brass	Compliant	Active
1-338309-2	TE Connectivity AMP	D-Sub Plug, Male	9	1 (DE, E)	Through Hole	Solder	6.0	—	-55 to 105	Phosphor Bronze	ROHS3 Compliant	Active
1-5747871-3	TE Connectivity AMP	D-Sub Plug, Male	9	1 (DE, E)	Through Hole	Solder	6.0	125	-55 to 105	Brass	ROHS3 Compliant	Active
1-5747871-4	TE Connectivity AMP	D-Sub Plug, Male	9	1 (DE, E)	Through Hole	Solder	6.0	125	-55 to 105	Brass	RoHS Compliant	Active
1-5747871-6	TE Connectivity AMP	D-Sub Plug, Male	9	1 (DE, E)	Through Hole	Solder	6.0	125	-55 to 105	Brass	ROHS3 Compliant	Active
1-747871-4	TE Connectivity AMP	D-Sub Plug, Male	9	1 (DE, E)	Through Hole	Solder	6.0	125	-55 to 105	Brass	Non-compliant	Active
1-747871-6	TE Connectivity AMP	D-Sub Plug, Male	9	1 (DE, E)	Through Hole	Solder	6.0	125	-55 to 105	Brass	ROHS3 Compliant	Active
172-009-112R001	NorComp Inc.	D-Sub Plug, Male	9	1 (DE, E)	Panel Mount, Through Hole	Solder	5.0	—	-50 to 100	Brass	ROHS3 Compliant	Obsolete
172-E09-113R001	NorComp Inc.	D-Sub Plug, Male	9	1 (DE, E)	Panel Mount, Through Hole	Solder	5.0	—	-50 to 100	Brass	ROHS3 Compliant	Active
172-E09-113R011	NorComp Inc.	D-Sub Plug, Male	9	1 (DE, E)	Panel Mount, Through Hole	Solder	5.0	—	-50 to 100	Brass	ROHS3 Compliant	Active
172-E09-113R021	NorComp Inc.	D-Sub Plug, Male	9	1 (DE, E)	Panel Mount, Through Hole	Solder	5.0	—	-50 to 100	Brass	ROHS3 Compliant	Active

Engineering Selection Recommendations

Tier 1: Direct Substitutes (Active Status, Full Compliance)

The TE Connectivity AMPLIMITE HD-20 series connectors (1-5747871-3, 1-5747871-4, 1-5747871-6, 1-747871-6) are classified as primary substitutes. These parts maintain active product status, RoHS compliance, and identical shell size, position count, and termination method. The primary design consideration is the reduced current rating (6.0A versus 7.5A) and voltage rating (125V versus 300V). These reductions are acceptable for signal-level applications but require verification for high-current or high-voltage circuit implementations.

Tier 2: Functional Substitutes (Active Status, Panel Mount Configuration)

The NorComp 172-E series (172-E09-113R001, 172-E09-113R011, 172-E09-113R021) provides panel mount through-hole configuration matching the L777DFE09POL2 mechanical interface. These parts maintain active product status and RoHS3 compliance. Current rating is reduced to 5.0A, and operating temperature range is limited to -50°C to 100°C. These parts are suitable for applications within the specified thermal and current envelope.

Tier 3: Limited Substitutes (Obsolete or Reduced Compliance)

The NorComp 172-009-112R001 is classified as obsolete and should be evaluated only when new inventory is unavailable and application requirements permit extended lead times or inventory management considerations. The TE Connectivity 1-747871-4 carries non-compliant RoHS designation and is suitable only for applications where RoHS compliance is not mandated.

Mounting Configuration Consideration:

The L777DFE09POL2 features panel mount through-hole configuration. TE Connectivity AMPLIMITE series parts feature vertical through-hole mounting without panel mount flange. Mechanical board layout and enclosure design must accommodate this difference. NorComp 172-E series maintains panel mount configuration, providing direct mechanical compatibility.

Frequently Asked Questions (FAQ)

Q1: Can TE Connectivity AMPLIMITE HD-20 series connectors directly replace the L777DFE09POL2 in all applications?

A: AMPLIMITE HD-20 series connectors (1-5747871-3, 1-5747871-4, 1-5747871-6, 1-747871-6) provide electrical and functional equivalence for signal-level applications. However, two design differences require verification: (1) Mounting type is vertical through-hole rather than panel mount, requiring mechanical board layout adjustment; (2) Current rating is 6.0A versus 7.5A, and voltage rating is 125V versus 300V, limiting use in high-current or high-voltage circuits. Confirm application requirements before substitution.

Q2: What is the difference between RoHS Compliant and ROHS3 Compliant designations?

A: Both designations indicate compliance with Restriction of Hazardous Substances regulations. ROHS3 represents the most recent regulatory iteration. Parts marked as either RoHS Compliant or ROHS3 Compliant are acceptable for applications requiring hazardous substance restrictions. The TE Connectivity 1-747871-4 is marked as RoHS non-compliant and is restricted to applications where RoHS compliance is not required.

Q3: Why do NorComp 172-E series parts have a lower current rating (5.0A) than the L777DFE09POL2 (7.5A)?

A: Current rating is determined by contact geometry, material composition, and thermal design. The 5.0A rating for NorComp parts reflects their specific contact design and is the maximum safe continuous current for those connectors. Applications requiring 7.5A continuous current must use the L777DFE09POL2 or TE Connectivity AMPLIMITE series (6.0A rating). For signal-level applications with lower current requirements, the 5.0A rating is sufficient.

Q4: Can I use a substitute part with a lower operating temperature maximum (-50°C to 100°C instead of -55°C to 125°C)?

A: Substitution is acceptable only when the application's actual operating temperature range falls within the substitute part's specification. If the application requires operation at 110°C or higher, or below -50°C, the substitute part is not suitable. Verify the actual equipment operating environment before selecting a substitute with reduced temperature range.

Q5: What is the significance of the flange feature differences (Housing/Shell Unthreaded versus Mating Side Female Screwlock)?

A: The flange feature determines the mechanical interface and mating method. L777DFE09POL2 features an unthreaded housing shell, while TE Connectivity AMPLIMITE series features a female screwlock on the mating side. These represent different mechanical coupling methods. NorComp 172-E series features unthreaded housing, matching the L777DFE09POL2 interface. Verify mating connector compatibility and mechanical coupling requirements before substitution.

Q6: Are packaging differences (Tray, Tube, Bulk) significant for component selection?

A: Packaging affects inventory management, handling, and storage but does not impact electrical or mechanical performance. Tray, tube, and bulk packaging contain identical components. Select packaging based on procurement quantity and storage requirements.

Q7: What does "Contact Finish Thickness: Flash" mean compared to "30.0µin (0.76µm)"?

A: Contact finish thickness specifies the gold plating depth. "Flash" indicates a minimal gold coating applied for corrosion protection, while "30.0µin (0.76µm)" specifies a thicker, more durable gold layer. Thicker gold plating provides enhanced contact reliability and longevity. For applications requiring maximum contact durability, the L777DFE09POL2 with 30.0µin thickness is preferred over flash-plated alternatives.

Q8: Can I substitute a part with Phosphor Bronze contacts (1-338309-2) for the brass contact L777DFE09POL2?

A: Phosphor Bronze and brass are both acceptable contact materials for D-Sub connectors. The 1-338309-2 with Phosphor Bronze contacts provides equivalent electrical performance and is suitable for substitution. Contact material selection does not affect functional compatibility in signal applications.

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