L777DFEH09POL2RM8 D-Sub Connector Equivalent & Substitute Parts

Part Overview

The L777DFEH09POL2RM8 is a 9-position D-Sub plug connector manufactured by Amphenol ICC, designed for panel mount, through-hole solder applications. This connector features male pins, board-side 4-40 flange, and is rated for 7.5A at 300V operation across -55°C to 125°C. The part is currently active in production with 670 units in stock.

Substitute parts are identified when equivalent electrical performance, mechanical compatibility, and connector geometry align with the original specification. Alternative sources provide equivalent functionality for applications requiring component availability, supply chain flexibility, or specific compliance certifications.

Key Parameters

Parameter	L777DFEH09POL2RM8
Connector Type	D-Sub Plug, Male Pins
Number of Positions	9
Shell Size / Layout	1 (DE, E)
Mounting Type	Panel Mount, Through Hole
Flange Feature	Board Side (4-40)
Termination	Solder
Current Rating	7.5A
Voltage Rating	300V
Operating Temperature	-55°C to 125°C
Shell Material / Finish	Steel, Tin Plated
Contact Finish	Gold (30.0µin / 0.76µm)
Contact Material	Brass
Dielectric Material	Thermoplastic, Glass Filled
Flammability Rating	UL94 V-0
RoHS Status	RoHS Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts are grouped based on strict alignment with the following critical parameters:

Primary Compatibility Criteria:

Connector style: D-Sub plug with male pins
Position count: 9 positions, 2 rows
Shell size and layout: 1 (DE, E)
Termination method: Solder
Flange configuration: Board-side mounting with 4-40 fastening

Secondary Compatibility Criteria:

Current rating: Minimum 5A (L777DFEH09POL2RM8 rated 7.5A)
Voltage rating: Minimum 125V (L777DFEH09POL2RM8 rated 300V)
Operating temperature range: Minimum -50°C to 100°C (L777DFEH09POL2RM8 rated -55°C to 125°C)
Shell material: Steel with tin or nickel plating
Contact material: Brass with gold finish
Flammability: UL94 V-0

Substitution Logic: Parts meeting all primary criteria and secondary criteria within acceptable operational margins are classified as direct substitutes. Parts with reduced current or voltage ratings are suitable for applications operating within their specified limits. Parts with narrower temperature ranges are suitable for applications within those ranges.

Parameter Comparison

Part Number	Manufacturer	Connector Type	Positions	Mounting	Flange Feature	Current (A)	Voltage (V)	Temp Range (°C)	Shell Finish	Contact Finish	RoHS Status	Product Status
L777DFEH09POL2RM8	Amphenol ICC	D-Sub Plug, Male	9	Panel Mount, Through Hole	Board Side (4-40)	7.5	300	-55 to 125	Steel, Tin	Gold (30.0µin)	RoHS Compliant	Active
1-5747871-3	TE Connectivity AMP	D-Sub Plug, Male	9	Through Hole	Mating Side, Female Screwlock (4-40)	6	125	-55 to 105	Steel, Tin	Gold (Flash)	ROHS3 Compliant	Active
1-5747871-4	TE Connectivity AMP	D-Sub Plug, Male	9	Through Hole	Mating Side, Female Screwlock (4-40)	6	125	-55 to 105	Steel, Tin	Gold	RoHS Compliant	Active
1-5747871-6	TE Connectivity AMP	D-Sub Plug, Male	9	Through Hole	Mating Side, Female Screwlock (4-40)	6	125	-55 to 105	Steel, Tin	Gold	ROHS3 Compliant	Active
1-747871-4	TE Connectivity AMP	D-Sub Plug, Male	9	Through Hole	Mating Side, Female Screwlock (4-40)	6	125	-55 to 105	Steel, Tin	Gold	RoHS non-compliant	Active
1-747871-6	TE Connectivity AMP	D-Sub Plug, Male	9	Through Hole	Mating Side, Female Screwlock (4-40)	6	125	-55 to 105	Steel, Tin	Gold	ROHS3 Compliant	Active
172-009-112R001	NorComp Inc.	D-Sub Plug, Male	9	Panel Mount, Through Hole	Housing/Shell (Unthreaded)	5	—	-50 to 100	Steel, Tin	Gold (Flash)	ROHS3 Compliant	Obsolete
172-E09-113R011	NorComp Inc.	D-Sub Plug, Male	9	Panel Mount, Through Hole	Board Side (4-40)	5	—	-50 to 100	Steel, Nickel	Gold (Flash)	ROHS3 Compliant	Active
172-E09-113R021	NorComp Inc.	D-Sub Plug, Male	9	Panel Mount, Through Hole	Board Side (4-40)	5	—	-50 to 100	Steel, Nickel	Gold (Flash)	ROHS3 Compliant	Active
172-E09-113R911	NorComp Inc.	D-Sub Plug, Male	9	Panel Mount, Through Hole	Board Side (4-40), Mating Side Female Screwlock (4-40)	5	—	-50 to 100	Steel, Nickel	Gold (Flash)	ROHS3 Compliant	Active
2-5748003-0	TE Connectivity AMP	D-Sub Plug, Male	9	Through Hole	Housing/Shell (4-40)	6	125	-55 to 105	Steel, Tin	Gold	ROHS3 Compliant	Active

Engineering Selection Recommendations

Tier 1 Substitutes (Highest Compatibility):

Parts 172-E09-113R011, 172-E09-113R021, and 172-E09-113R911 from NorComp Inc. share identical mounting configuration (panel mount, through hole with board-side 4-40 flange) with the L777DFEH09POL2RM8. These parts are active products with ROHS3 compliance. Current rating of 5A and unspecified voltage rating require application verification for circuits operating above 5A or requiring 300V rating. Operating temperature range of -50°C to 100°C is narrower than the original specification; applications requiring -55°C operation are not suitable for these substitutes.

Tier 2 Substitutes (Moderate Compatibility):

Parts 1-5747871-3, 1-5747871-4, 1-5747871-6, 1-747871-6, and 2-5748003-0 are TE Connectivity AMPLIMITE HD-20 series connectors with through-hole mounting and 6A current rating. These parts feature mating-side or housing-side flange configurations rather than board-side mounting. Mechanical integration requires verification of flange position compatibility with existing panel cutouts and mounting hardware. Voltage rating of 125V is lower than the original 300V specification; applications requiring higher voltage operation are not suitable. Operating temperature range of -55°C to 105°C accommodates the lower temperature limit of the original part but does not extend to 125°C. All active variants carry current RoHS compliance certifications.

Tier 3 Substitutes (Limited Compatibility):

Part 1-747871-4 carries RoHS non-compliant status and REACH Affected designation. This part is suitable only for applications without RoHS or REACH compliance requirements.

Part 172-009-112R001 from NorComp is obsolete and carries unthreaded housing flange configuration. This part is not recommended for new designs.

Compliance Considerations:

The original L777DFEH09POL2RM8 is RoHS Compliant with MSL 1 (Unlimited). All recommended Tier 1 and Tier 2 substitutes maintain RoHS compliance status (ROHS3 or RoHS Compliant). MSL rating of 1 (Unlimited) is consistent across all active substitute parts, indicating no moisture sensitivity restrictions for storage or handling.

Frequently Asked Questions (FAQ)

Q: Can I use TE Connectivity AMPLIMITE HD-20 series connectors (1-5747871-3, 1-5747871-4, 1-5747871-6) as direct replacements for the L777DFEH09POL2RM8?

A: These connectors share the same 9-position D-Sub plug configuration, shell size (1/DE/E), solder termination, and brass contact material. However, the flange configuration differs: AMPLIMITE parts feature mating-side or housing-side female screwlock flanges, while the L777DFEH09POL2RM8 has a board-side 4-40 flange. Mechanical compatibility depends on panel cutout design and mounting hardware. Additionally, the AMPLIMITE series is rated for 6A at 125V with -55°C to 105°C operation, compared to 7.5A at 300V with -55°C to 125°C for the original part. Substitution is valid only for applications operating within these reduced electrical and thermal limits.

Q: What is the difference between NorComp 172-E09-113R011, 172-E09-113R021, and 172-E09-113R911?

A: All three parts are 9-position D-Sub plugs with panel mount, through-hole configuration and board-side 4-40 flange. The primary difference is flange configuration: 172-E09-113R011 and 172-E09-113R021 feature board-side flange only, while 172-E09-113R911 includes both board-side and mating-side female screwlock flanges. The mating-side screwlock on 172-E09-113R911 provides mechanical locking capability during mating. All three parts are rated for 5A current and operate across -50°C to 100°C. Selection depends on whether mating-side locking is required for the application.

Q: Why do some substitute parts have lower current and voltage ratings than the L777DFEH09POL2RM8?

A: Current and voltage ratings are determined by contact geometry, material composition, and thermal design. The L777DFEH09POL2RM8 is rated for 7.5A at 300V based on Amphenol ICC's design specifications. TE Connectivity AMPLIMITE HD-20 series connectors are rated for 6A at 125V, and NorComp 172-E series connectors are rated for 5A. These lower ratings reflect different design approaches and contact specifications. Substitution is valid only when the application's actual current and voltage requirements fall within the substitute part's rating. Applications requiring 7.5A or 300V operation cannot use lower-rated substitutes.

Q: Are all substitute parts RoHS compliant?

A: Most active substitute parts carry RoHS compliance certifications (RoHS Compliant or ROHS3 Compliant). Exception: Part 1-747871-4 is marked RoHS non-compliant and REACH Affected. This part is suitable only for applications without RoHS or REACH compliance mandates. The original L777DFEH09POL2RM8 is RoHS Compliant, and all Tier 1 and Tier 2 recommended substitutes maintain equivalent or superior compliance status.

Q: What does MSL 1 (Unlimited) mean for these connectors?

A: MSL (Moisture Sensitivity Level) 1 indicates the lowest moisture sensitivity classification. MSL 1 (Unlimited) means the component has no moisture sensitivity restrictions and does not require special storage, handling, or baking procedures prior to soldering. All substitute parts listed carry MSL 1 (Unlimited) rating, matching the original part's specification.

Q: Can I substitute a connector with a different flange configuration?

A: Flange configuration affects mechanical mounting. The L777DFEH09POL2RM8 features a board-side 4-40 flange designed for panel mounting with fasteners on the circuit board side. TE Connectivity AMPLIMITE parts feature mating-side or housing-side flanges. Substitution requires verification that the panel cutout, mounting hole pattern, and fastening hardware are compatible with the substitute part's flange configuration. Mechanical integration testing is necessary before production implementation.

Q: What is the difference between tin-plated and nickel-plated shell finishes?

A: The L777DFEH09POL2RM8 features a steel shell with tin plating. NorComp 172-E series substitutes feature steel shells with nickel plating. Both finishes provide corrosion resistance. Tin plating offers lower contact resistance and better solderability. Nickel plating provides superior corrosion resistance in harsh environments. Selection depends on environmental exposure and electrical performance requirements. Both finishes are compatible with gold-plated contacts and solder termination.

Q: Are there packaging differences between substitute parts?

A: Yes. The L777DFEH09POL2RM8 is supplied in Tray packaging. Substitute parts are supplied in Tray, Tube, or Bulk packaging depending on the specific part number. Packaging affects handling, storage, and component presentation but does not affect electrical or mechanical performance. Verify packaging requirements for your procurement and assembly processes.

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