L77DFEG09SU

Part Overview

The L77DFEG09SU is a 9 Position D-Sub Receptacle connector manufactured by Amphenol ICC, featuring female sockets, panel mount through-hole installation, and solder termination. This connector is actively produced and is essential for applications requiring standard D-Sub connectivity with compact form factor and robust electrical performance. Alternative models become necessary when different mounting configurations, compliance certifications, or environmental operating ranges are required for specific applications.

Key Parameters

Parameter	Value
Connector Type	Receptacle, Female Sockets
Number of Positions	9
Shell Size & Layout	1 (DE, E)
Mounting Type	Panel Mount, Through Hole
Termination	Solder
Current Rating	7.5A
Voltage Rating	300V
Operating Temperature Range	-55°C to 155°C
Flammability Rating	UL94 V-0
RoHS Status	RoHS Compliant

Substitute Part Grouping Explanation

Substitution of the L77DFEG09SU is determined by strict matching of electrical and mechanical parameters. All qualified substitutes must maintain the following core attributes:

Critical Parameters (Must Match):

Connector Type: Receptacle, Female Sockets
Number of Positions: 9
Shell Size & Layout: 1 (DE, E)
Termination: Solder
Contact Type: Signal

Allowed Parameter Variations: Substitute parts may differ in the following parameters while maintaining functional compatibility:

Mounting Type (Panel Mount through-hole variants to Board Mount through-hole variants)
Flange Feature configuration (Board Side M3, Housing/Shell unthreaded, or Mating Side Female Screwlock)
Current Rating (may be lower or equal; L77DFEG09SU rating is 7.5A)
Voltage Rating (may be lower or equal; L77DFEG09SU rating is 300V)
Operating Temperature Range (may be narrower; L77DFEG09SU range is -55°C to 155°C)
Shell Material Finish (Steel tin plated, steel nickel plated, or steel unfinished)
Contact Finish (Gold or unspecified)
Dielectric Material (Thermoplastic glass-filled, PCT, PBT polyester glass-filled, or polyester)
RoHS/REACH Compliance Status (must be compliant or equivalent regulatory standing)

Parameter Comparison

Parameter	L77DFEG09SU	09641127230	09641127235	09661116503	09661117503	09661556513	1-5747150-3	1-5747150-4	1-5747150-6	1-747150-4	191-009-213L571
Manufacturer	Amphenol ICC	HARTING	HARTING	HARTING	HARTING	HARTING	TE Connectivity	TE Connectivity	TE Connectivity	TE Connectivity	NorComp Inc.
Connector Type	Receptacle, Female Sockets	Receptacle, Female Sockets	Receptacle, Female Sockets	Receptacle, Female Sockets	Receptacle, Female Sockets	Receptacle, Female Sockets	Receptacle, Female Sockets	Receptacle, Female Sockets	Receptacle, Female Sockets	Receptacle, Female Sockets	Receptacle, Female Sockets
Number of Positions	9	9	9	9	9	9	9	9	9	9	9
Shell Size & Layout	1 (DE, E)	1 (DE, E)	1 (DE, E)	1 (DE, E)	1 (DE, E)	1 (DE, E)	1 (DE, E)	1 (DE, E)	1 (DE, E)	1 (DE, E)	1 (DE, E)
Mounting Type	Panel Mount, Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Panel Mount, Through Hole
Termination	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder
Current Rating (Amps)	7.5A	7.5A	7.5A	6.5A	6.5A	6.5A	6A	6A	6A	6A	5A
Voltage Rating	300V	100V	100V	Not Specified	Not Specified	Not Specified	125V	125V	125V	125V	Not Specified
Operating Temperature Range	-55°C to 155°C	-20°C to 125°C	-20°C to 125°C	-55°C to 125°C	-55°C to 125°C	-55°C to 125°C	-55°C to 105°C	-55°C to 105°C	-55°C to 105°C	-55°C to 105°C	-55°C to 125°C
Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
RoHS Status	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant	RoHS Compliant	RoHS non-compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

The parts 09641127230 and 09641127235 from HARTING maintain the full 7.5A current rating and provide the closest electrical performance to the L77DFEG09SU. Both are ROHS3 compliant and actively produced. Part 09641127235 includes board lock and filter features and offers board-side flange mounting with tin-plated steel shell. Part 09641127230 provides unthreaded housing flange with filter feature and natural color. Both operate within -20°C to 125°C range.

The part 191-009-213L571 from NorComp is a direct panel-mount equivalent matching the installation method of the L77DFEG09SU. It maintains panel mount, through-hole configuration with mating-side female screwlock flange. This part is actively produced, ROHS3 compliant, and rated for -55°C to 125°C operation, though with reduced current rating of 5A.

Secondary Substitutes (Conditional Use):

Parts 09661116503, 09661117503, and 09661556513 from HARTING provide full operating temperature range matching the L77DFEG09SU (-55°C to 125°C) and are ROHS3 compliant. These parts feature mating-side female screwlock flanges and board-mount through-hole installation. Current rating is 6.5A. Part 09661556513 includes board lock feature and gold contact finish.

The TE Connectivity AMPLIMITE HD-20 series parts (1-5747150-3, 1-5747150-4, 1-5747150-6, and 1-747150-4) are actively produced alternatives with full -55°C to 105°C operating range and reduced current ratings of 6A. Parts 1-5747150-4, 1-5747150-6, and 1-747150-4 specify 30.0µin gold contact finish thickness. The variant 1-747150-4 carries RoHS non-compliant status and REACH affected designation.

Applications Requiring Full Voltage Rating (300V):

If full 300V voltage rating is required for the application, only the L77DFEG09SU meets this specification. Substitute parts specify 100V to 125V maximum, which limits them to lower-voltage circuit applications.

Applications with Extended Upper Temperature Requirement (Above 125°C):

Only the L77DFEG09SU maintains the full -55°C to 155°C operating range. Substitutes are limited to maximum 125°C operation.

Frequently Asked Questions (FAQ)

Q: Can I substitute the L77DFEG09SU with any of the HARTING parts listed?

A: HARTING parts 09641127230 and 09641127235 are electrically compatible substitutes for most applications, as they maintain the 9-position configuration, female socket receptacle type, shell size DE/E layout, and solder termination. However, 09641127230 and 09641127235 operate at maximum 100V voltage rating compared to 300V for the L77DFEG09SU, and temperature range is limited to -20°C to 125°C. The mounting configuration differs—these are board-mount through-hole rather than panel-mount through-hole. Parts 09661116503, 09661117503, and 09661556513 provide through-hole board mounting with -55°C to 125°C temperature range but reduce current rating to 6.5A and lack specified voltage rating.

Q: Why is the NorComp 191-009-213L571 recommended as a primary substitute?

A: The NorComp 191-009-213L571 maintains the critical panel-mount through-hole installation method of the L77DFEG09SU, eliminating mechanical redesign. It preserves the 9-position female socket receptacle configuration, DE/E shell size, and solder termination. Operating temperature range extends to -55°C to 125°C. RoHS3 compliance aligns with modern regulatory requirements. The primary limitation is reduced current rating of 5A versus 7.5A for the original part, requiring evaluation of actual circuit current draw.

Q: What are the key limitations when substituting with TE Connectivity AMPLIMITE HD-20 series parts?

A: The TE Connectivity alternatives (1-5747150-3, 1-5747150-4, 1-5747150-6, 1-747150-4) provide board-mount through-hole configuration rather than panel-mount installation, necessitating mechanical redesign. Current rating is reduced to 6A, and maximum operating temperature is limited to 105°C. Voltage rating is specified as 125V. The part variant 1-747150-4 carries RoHS non-compliant status and is REACH affected, restricting use in regulated applications. Parts 1-5747150-4 and 1-5747150-6 are RoHS compliant.

Q: Which substitutes maintain full operating temperature range compatibility?

A: The HARTING parts 09661116503, 09661117503, 09661556513, and the NorComp part 191-009-213L571 maintain -55°C to 125°C operating range, matching the lower bound and approaching the upper temperature limit of the L77DFEG09SU. However, none of the substitutes support the extended upper temperature rating of 155°C provided by the L77DFEG09SU.

Q: Can any substitute maintain the 300V voltage rating of the L77DFEG09SU?

A: No substitute part maintains the 300V voltage rating. HARTING parts 09641127230 and 09641127235 specify 100V maximum, while TE Connectivity parts specify 125V maximum. Other parts have unspecified voltage ratings. Applications requiring 300V operation necessitate use of the original L77DFEG09SU.

Q: What packaging formats are available for substitutes?

A: Packaging availability differs by manufacturer and part number. The L77DFEG09SU is supplied in tray packaging. HARTING substitutes are available in bulk packaging. TE Connectivity AMPLIMITE HD-20 series parts 1-5747150-3, 1-5747150-4, and 1-5747150-6 are supplied in tube packaging, while 1-747150-4 is supplied in bulk. The NorComp 191-009-213L571 is supplied in tray packaging.

Q: Are all substitutes RoHS compliant?

A: Most substitutes are ROHS3 compliant or RoHS compliant. The exception is the TE Connectivity part 1-747150-4, which is RoHS non-compliant and REACH affected. For applications requiring RoHS compliance, exclude this part number from selection.

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