L77TSEG09SOL2C309 Equivalent & Substitute Parts

Part Overview

The L77TSEG09SOL2C309 is a 9-position D-Sub receptacle connector manufactured by Amphenol ICC (Commercial Products). This female sockets connector features vertical solder termination, board-side M3 flange mounting, and through-hole installation. The connector is rated for 5A continuous current at 600V and operates across the temperature range of -55°C to 125°C. Product status is Active with RoHS compliance and unlimited moisture sensitivity level (MSL 1). Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and design alternatives where specific flange configurations, contact finishes, or dielectric materials may be required.

Key Parameters

Parameter	Value
Connector Style	D-Sub
Connector Type	Receptacle, Female Sockets
Number of Positions	9
Number of Rows	2
Shell Size, Connector Layout	1 (DE, E)
Mounting Type	Through Hole
Termination	Solder
Contact Type	Signal
Material Flammability Rating	UL94 V-0
Current Rating (Amps)	5A
Voltage Rating	600V
Operating Temperature	-55°C ~ 125°C
RoHS Status	RoHS Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the L77TSEG09SOL2C309 is determined by strict adherence to the following core parameters:

Critical Matching Parameters:

Connector Style: D-Sub
Connector Type: Receptacle, Female Sockets
Number of Positions: 9
Number of Rows: 2
Shell Size, Connector Layout: 1 (DE, E)
Mounting Type: Through Hole
Termination: Solder
Contact Type: Signal
Material Flammability Rating: UL94 V-0

Allowable Variation Parameters:

Flange Feature (Board Side M3, Board Side 4-40, Housing/Shell Unthreaded, Mating Side Female Screwlock 4-40)
Contact Finish (Gold Flash, Gold, or unspecified)
Shell Material Finish (Steel Tin Plated, Steel, Steel Nickel Plated)
Contact Form (Stamped or Machined)
Dielectric Material (Thermoplastic Glass Filled, PCT, PBT Polyester Glass Filled, Polyamide Nylon 6T)
Current Rating (5A to 7.5A)
Voltage Rating (100V to 600V)
Operating Temperature Range (minimum -55°C to -20°C; maximum 100°C to 125°C)
Contact Material (Copper Alloy or Brass)
Packaging (Tray or Bulk)

All substitute parts listed maintain active product status and RoHS compliance (RoHS Compliant or ROHS3 Compliant).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Connector Type	Positions	Flange Feature	Current Rating (A)	Voltage Rating (V)	Operating Temp (°C)	Contact Finish	Shell Material, Finish	Packaging	RoHS Status
L77TSEG09SOL2C309	Amphenol ICC	Receptacle, Female Sockets	9	Board Side (M3)	5	600	-55 ~ 125	Gold Flash	Steel, Tin Plated	Tray	RoHS Compliant
09641127230	HARTING	Receptacle, Female Sockets	9	Housing/Shell (Unthreaded)	7.5	100	-20 ~ 125	—	Steel	Bulk	ROHS3 Compliant
09641127235	HARTING	Receptacle, Female Sockets	9	Board Side (4-40)	7.5	100	-20 ~ 125	—	Steel, Tin Plated	Bulk	ROHS3 Compliant
09661116503	HARTING	Receptacle, Female Sockets	9	Mating Side, Female Screwlock (4-40)	6.5	—	-55 ~ 125	—	Steel	Bulk	ROHS3 Compliant
09661117503	HARTING	Receptacle, Female Sockets	9	Mating Side, Female Screwlock (4-40)	6.5	—	-55 ~ 125	—	Steel	Bulk	ROHS3 Compliant
09661516513	HARTING	Receptacle, Female Sockets	9	Mating Side, Female Screwlock (4-40)	6.5	—	-55 ~ 125	—	Steel	Tray	ROHS3 Compliant
09661517513	HARTING	Receptacle, Female Sockets	9	Mating Side, Female Screwlock (4-40)	6.5	—	-55 ~ 125	—	Steel	Bulk	ROHS3 Compliant
09661556513	HARTING	Receptacle, Female Sockets	9	Mating Side, Female Screwlock (4-40)	6.5	—	-55 ~ 125	Gold	Steel	Bulk	ROHS3 Compliant
172-E09-213R001	NorComp Inc.	Receptacle, Female Sockets	9	Housing/Shell (Unthreaded)	5	—	-50 ~ 100	Gold Flash	Steel, Nickel Plated	Tray	ROHS3 Compliant
172-E09-213R021	NorComp Inc.	Receptacle, Female Sockets	9	Board Side (4-40)	5	—	-50 ~ 100	Gold Flash	Steel, Nickel Plated	Tray	ROHS3 Compliant
172-E09-213R031	NorComp Inc.	Receptacle, Female Sockets	9	Mating Side (4-40)	5	—	-50 ~ 100	Gold Flash	Steel, Nickel Plated	Tray	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

The HARTING 09661517513 and 09661516513 connectors provide the closest functional equivalence to the L77TSEG09SOL2C309. Both maintain the full operating temperature range (-55°C to 125°C), support 6.5A current rating, feature UL94 V-0 flammability rating, and carry ROHS3 compliance. The primary difference is flange configuration (Mating Side Female Screwlock 4-40 versus Board Side M3), which affects mounting methodology but not electrical performance. The 09661516513 is available in Tray packaging, matching the original part's packaging format.

Secondary Substitutes (Voltage/Temperature Considerations):

The HARTING 09641127235 offers Board Side (4-40) flange mounting with higher current capacity (7.5A) and tin-plated steel shell finish. However, this part operates at reduced voltage (100V versus 600V) and narrower temperature range (-20°C to 125°C). Selection of this part requires confirmation that application voltage and minimum operating temperature requirements do not exceed these specifications.

The NorComp 172-E09-213R021 and 172-E09-213R031 connectors provide gold flash contact finish and nickel-plated steel shell, with 5A current rating matching the original part. Operating temperature range is restricted to -50°C to 100°C. These parts are suitable for applications not requiring the full -55°C minimum or 125°C maximum temperature capability of the L77TSEG09SOL2C309.

Flange Configuration Considerations:

Board Side M3 (Original): Direct PCB mounting with M3 screw holes
Board Side 4-40: Direct PCB mounting with 4-40 screw holes; compatible with standard mounting hardware
Mating Side Female Screwlock 4-40: Connector-side mounting; requires mating connector with corresponding screwlock feature
Housing/Shell Unthreaded: Panel mount configuration; requires panel cutout and mechanical retention

Compliance and Certification:

All listed substitute parts maintain active product status and RoHS compliance. HARTING parts carry ROHS3 Compliant designation with REACH Unaffected status. NorComp parts carry ROHS3 Compliant designation with REACH Unaffected status. The original L77TSEG09SOL2C309 carries RoHS Compliant status. All parts are classified under ECCN EAR99 and HTSUS 8536.69.4040.

Frequently Asked Questions (FAQ)

Q: Can the HARTING 09641127235 replace the L77TSEG09SOL2C309 in all applications?

A: The HARTING 09641127235 is electrically compatible for applications operating at 100V or below and temperatures between -20°C and 125°C. Applications requiring 600V operation or minimum temperatures below -20°C must use the original part or alternative substitutes rated for those specifications. The flange configuration differs (Board Side 4-40 versus Board Side M3), requiring verification of mounting hole compatibility.

Q: What is the difference between Board Side and Mating Side flange configurations?

A: Board Side flanges mount directly to the printed circuit board with screw holes in the connector flange. Mating Side flanges mount to the mating connector and require the mating connector to provide corresponding screwlock features. Selection depends on the mechanical interface design of the application.

Q: Are the HARTING and NorComp substitutes pin-compatible with the L77TSEG09SOL2C309?

A: All listed substitutes maintain the 9-position, 2-row D-Sub (DE, E) shell size configuration. Pin arrangement and contact spacing are identical. Electrical compatibility is confirmed for signal-type contacts. Physical mating with existing connectors depends on flange configuration and shell finish compatibility.

Q: Why do some substitute parts not specify voltage rating?

A: Voltage rating is not provided in the technical data for certain HARTING and NorComp parts. When voltage rating is not specified, the part should be evaluated against application requirements through the manufacturer's technical documentation or direct inquiry. The original L77TSEG09SOL2C309 is rated for 600V operation.

Q: What is the significance of contact finish (Gold Flash versus Gold)?

A: Gold Flash provides a thin gold plating layer over base metal for corrosion resistance and electrical conductivity. Gold provides thicker plating for enhanced durability and contact reliability in high-cycle mating applications. Both finishes are suitable for signal-level applications. Selection depends on application cycle life and environmental exposure requirements.

Q: Can I substitute a part with higher current rating (7.5A) for the 5A-rated original?

A: A higher current rating indicates the substitute part can safely handle greater current without thermal degradation. Substitution is permissible from an electrical safety perspective. However, the application circuit design must not exceed the original 5A specification unless the entire signal path and termination components are re-evaluated for the higher current capacity.

Q: What packaging format should I select: Tray or Bulk?

A: Tray packaging provides individual compartmentalization for component protection during storage and handling. Bulk packaging offers cost efficiency for high-volume procurement. Selection depends on inventory management practices, handling procedures, and cost requirements. The original L77TSEG09SOL2C309 is supplied in Tray packaging.

Q: Are all substitute parts RoHS compliant?

A: Yes. The original L77TSEG09SOL2C309 carries RoHS Compliant status. All listed substitute parts carry either RoHS Compliant or ROHS3 Compliant designation, confirming compliance with Restriction of Hazardous Substances regulations. ROHS3 represents the current regulatory standard.

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