Amphenol ICC L77DFB25SU D-Sub 25 Position Receptacle Connector

Part Overview

The Amphenol ICC L77DFB25SU is a 25 position D-Sub receptacle connector with female sockets, designed for panel mount through-hole solder termination applications. This connector is actively produced and maintains full RoHS compliance with UL94 V-0 flammability rating. Equivalent and substitute parts are identified based on matching core electrical and mechanical parameters: 25 position configuration, D-Sub shell size 3 (DB, B), receptacle female socket type, solder termination, and panel mount through-hole mounting. Alternative models may be required due to inventory availability, specific flange feature requirements, or compliance certifications for particular applications.

Key Parameters

Parameter	L77DFB25SU Specification
Connector Type	Receptacle, Female Sockets
Number of Positions	25
Shell Size, Connector Layout	3 (DB, B)
Mounting Type	Panel Mount, Through Hole
Termination	Solder
Shell Material, Finish	Steel, Tin Plated
Contact Finish	Gold
Current Rating	7.5A
Voltage Rating	300V
Operating Temperature	-55°C ~ 125°C
Material Flammability Rating	UL94 V-0
RoHS Status	RoHS Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following mandatory parameters:

Connector Configuration: 25 position, D-Sub shell size 3 (DB, B), receptacle with female sockets
Termination Method: Solder termination only
Mounting Style: Panel mount through-hole mounting
Electrical Performance: Current rating minimum 5A, voltage rating minimum 125V
Compliance: UL94 V-0 flammability rating, active product status
Contact Material and Finish: Gold plated contacts for signal integrity

Substitute parts are grouped by manufacturer and flange feature variations. NorComp 172-E series parts provide housing/shell unthreaded or board-side/mating-side threaded options. TE Connectivity AMPLIMITE series parts offer housing/shell threaded (M3 or 4-40) or unthreaded configurations. All substitute parts maintain the core 25 position D-Sub receptacle architecture with solder termination and panel mount capability.

Parameter Comparison

Parameter	L77DFB25SU	172-E25-213R001	172-E25-213R011	172-E25-213R031	172-E25-213R911	2-338315-2	2-747708-0	207828-3	207828-4	5-338315-2	5207828-4
Manufacturer	Amphenol ICC	NorComp Inc.	NorComp Inc.	NorComp Inc.	NorComp Inc.	TE Connectivity	TE Connectivity	TE Connectivity	TE Connectivity	TE Connectivity	TE Connectivity
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	25	25	25	25	25	25	25	25	25	25	25
Shell Size, Connector Layout	3 (DB, B)	3 (DB, B)	3 (DB, B)	3 (DB, B)	3 (DB, B)	3 (DB, B)	3 (DB, B)	3 (DB, B)	3 (DB, B)	3 (DB, B)	3 (DB, B)
Mounting Type	Panel Mount, Through Hole	Panel Mount, Through Hole	Panel Mount, Through Hole	Panel Mount, Through Hole	Panel Mount, Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Termination	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder
Shell Material, Finish	Steel, Tin Plated	Steel, Nickel Plated	Steel, Nickel Plated	Steel, Nickel Plated	Steel, Nickel Plated	Steel, Tin Plated	Steel, Tin Plated	Not Specified	Not Specified	Steel, Tin Plated	Not Specified
Contact Finish	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold
Current Rating (Amps)	7.5A	5A	5A	5A	5A	6A	6A	6A	6A	6A	6A
Voltage Rating	300V	Not Specified	Not Specified	Not Specified	Not Specified	Not Specified	125V	125V	125V	Not Specified	125V
Operating Temperature	-55°C ~ 125°C	-50°C ~ 100°C	-50°C ~ 100°C	-50°C ~ 100°C	-50°C ~ 100°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C
Material 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	RoHS non-compliant	RoHS non-compliant	RoHS non-compliant	ROHS3 Compliant	RoHS Compliant
Product Status	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
Flange Feature	Housing/Shell (Unthreaded)	Housing/Shell (Unthreaded)	Board Side (4-40)	Mating Side (4-40)	Board Side (4-40), Mating Side Female Screwlock (4-40)	Housing/Shell (M3)	Housing/Shell (4-40)	Housing/Shell (Unthreaded)	Housing/Shell (Unthreaded)	Housing/Shell (Unthreaded)	Housing/Shell (Unthreaded)
Contact Material	Copper Alloy	Brass	Brass	Brass	Brass	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility)

NorComp 172-E25-213R001 and 5-338315-2 are the most direct substitutes for the L77DFB25SU. Both maintain active product status, UL94 V-0 compliance, and RoHS certification. The 172-E25-213R001 provides an unthreaded housing/shell configuration matching the original part's flange design. The 5-338315-2 offers identical unthreaded housing/shell geometry with ROHS3 compliance and equivalent electrical performance.

Secondary Substitutes (Flange Feature Variations)

TE Connectivity 2-338315-2 and 5-338315-2 from the AMPLIMITE HDP-20 series provide board lock features and maintain tin-plated steel shells with gold contacts. These parts are suitable when board lock functionality is required. NorComp 172-E25-213R011 and 172-E25-213R031 offer threaded flange options (board-side or mating-side 4-40) for applications requiring mechanical fastening at specific mounting points.

Compliance Considerations

All substitute parts maintain UL94 V-0 flammability rating and active product status. NorComp parts (172-E25 series) provide ROHS3 compliance. TE Connectivity AMPLIMITE HDP-20 series (2-338315-2, 5-338315-2) offer ROHS3 compliance. TE Connectivity AMPLIMITE HD-20 series (2-747708-0, 207828-3, 207828-4, 5207828-4) are RoHS non-compliant and REACH affected; these are suitable only for applications where RoHS compliance is not mandated.

Current and Voltage Derating

The L77DFB25SU operates at 7.5A and 300V. NorComp 172-E25 series parts are rated at 5A with unspecified voltage. TE Connectivity AMPLIMITE series parts are rated at 6A with 125V (HD-20) or unspecified voltage (HDP-20). Applications requiring the full 7.5A or 300V rating must use the original L77DFB25SU or confirm substitute part adequacy through electrical design review.

Temperature Range

The L77DFB25SU operates from -55°C to 125°C. NorComp 172-E25 series parts operate from -50°C to 100°C, representing a reduced temperature range. TE Connectivity AMPLIMITE series parts operate from -55°C to 105°C. Applications requiring the full -55°C to 125°C range must use the original L77DFB25SU.

Frequently Asked Questions (FAQ)

Q: Can NorComp 172-E25-213R001 directly replace the Amphenol ICC L77DFB25SU?

A: The 172-E25-213R001 matches the core connector architecture: 25 position D-Sub receptacle, female sockets, solder termination, panel mount through-hole, unthreaded housing/shell, and UL94 V-0 compliance. However, the operating temperature range is reduced (-50°C to 100°C versus -55°C to 125°C), and the current rating is lower (5A versus 7.5A). Substitution is valid only if the application does not require the full temperature or current specifications of the original part.

Q: What is the difference between NorComp 172-E25-213R011 and 172-E25-213R031?

A: Both parts are identical except for flange feature location. The 172-E25-213R011 has a board-side 4-40 threaded flange, while the 172-E25-213R031 has a mating-side 4-40 threaded flange. Selection depends on the mechanical mounting requirement: board-side threading for mounting to the PCB side, or mating-side threading for mounting to the connector mating side.

Q: Why are TE Connectivity AMPLIMITE HD-20 series parts (207828-3, 207828-4, 2-747708-0, 5207828-4) marked as RoHS non-compliant?

A: These parts do not meet RoHS directive requirements. They are suitable only for applications where RoHS compliance is not mandated or where legacy component specifications are acceptable. For new designs requiring RoHS compliance, use NorComp 172-E25 series or TE Connectivity AMPLIMITE HDP-20 series (2-338315-2, 5-338315-2).

Q: What is the significance of the board lock feature in 172-E25-213R911 and TE Connectivity parts?

A: Board lock features provide mechanical retention of the connector to the PCB, preventing accidental disconnection during handling or vibration. The 172-E25-213R911 includes both board-side and mating-side female screwlock (4-40) features. TE Connectivity AMPLIMITE series parts (2-338315-2, 5-338315-2) include board lock functionality. Selection of board lock variants depends on application requirements for mechanical security.

Q: Are there packaging differences between substitute parts?

A: Yes. The L77DFB25SU is supplied in trays. NorComp 172-E25 series parts are supplied in trays. TE Connectivity 2-338315-2 and 5-338315-2 are supplied in bulk. TE Connectivity 2-747708-0, 207828-3, 207828-4, and 5207828-4 are supplied in tubes. Packaging affects handling, storage, and inventory management but does not affect electrical or mechanical compatibility.

Q: Can the L77DFB25SU be used in applications requiring REACH compliance?

A: The L77DFB25SU RoHS status is listed as RoHS Compliant with REACH status not specified in the provided data. NorComp 172-E25 series parts are REACH Unaffected. TE Connectivity AMPLIMITE HDP-20 series (2-338315-2, 5-338315-2) have undefined REACH status. TE Connectivity AMPLIMITE HD-20 series (2-747708-0, 207828-3, 207828-4, 5207828-4) are REACH Affected. For applications requiring REACH compliance, confirm the specific REACH requirements with the component supplier.

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