L177DFB25SOL2RM8 Equivalent & Substitute Parts

Part Overview

The L177DFB25SOL2RM8 is a 25 Position D-Sub Receptacle connector manufactured by Amphenol ICC (Commercial Products). This panel mount, through-hole solder termination connector features female sockets in a 2-row configuration with Shell Size 3 (DB, B) layout. The connector is actively produced and stocked with 714 units in inventory. Equivalent and substitute parts are identified based on matching electrical and mechanical parameters to ensure functional compatibility in D-Sub connector applications requiring 25-position receptacle configurations.

Key Parameters

Parameter	L177DFB25SOL2RM8 Value
Connector Type	Receptacle, Female Sockets
Number of Positions	25
Number of Rows	2
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 (Amps)	7.5A
Voltage Rating	300V
Operating Temperature	-55°C ~ 125°C
Material Flammability Rating	UL94 V-0
RoHS Status	RoHS Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the L177DFB25SOL2RM8 is determined by the following critical parameters:

Mandatory Matching Parameters:

Connector Type: Receptacle, Female Sockets
Number of Positions: 25
Number of Rows: 2
Shell Size, Connector Layout: 3 (DB, B)
Termination: Solder
Material Flammability Rating: UL94 V-0

Allowable Variation Parameters:

Mounting Type: Panel Mount with Through Hole configuration
Shell Material Finish: Steel with Tin or Nickel plating
Contact Finish: Gold (with varying thickness specifications)
Current Rating: Minimum 5A (original part rated 7.5A)
Voltage Rating: Specified or unspecified in substitute parts
Operating Temperature: Range may vary within industrial standards
Flange Feature: Housing/Shell configurations or Board/Mating side mounting options
Contact Material: Copper Alloy, Brass, or Phosphor Bronze
Dielectric Material: Thermoplastic Glass Filled, Polyamide, or Polyester Glass Filled

Substitute parts from NorComp Inc. (172-E series) and TE Connectivity AMP Connectors (338315 series) meet the mandatory matching criteria and are functionally equivalent for 25-position D-Sub receptacle applications.

Parameter Comparison

Parameter	L177DFB25SOL2RM8	172-E25-213R001	172-E25-213R011	172-E25-213R031	172-E25-213R911	2-338315-2	5-338315-2	6-338315-2
Manufacturer	Amphenol ICC	NorComp Inc.	NorComp Inc.	NorComp Inc.	NorComp Inc.	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
Number of Positions	25	25	25	25	25	25	25	25
Number of Rows	2	2	2	2	2	2	2	2
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)
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
Termination	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	Steel, Tin Plated
Contact Finish	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold
Current Rating (Amps)	7.5A	5A	5A	5A	5A	6A	6A	6A
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
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
RoHS Status	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant
Product Status	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All substitute parts listed are actively produced and comply with UL94 V-0 flammability requirements and RoHS/ROHS3 standards. Selection between the L177DFB25SOL2RM8 and substitute parts depends on specific application requirements:

NorComp Inc. 172-E Series (172-E25-213R001, 172-E25-213R011, 172-E25-213R031, 172-E25-213R911): These connectors are suitable for applications where current requirements do not exceed 5A and operating temperature range of -50°C to 100°C is acceptable. The 172-E25-213R911 variant includes Board Lock features matching the original part. Nickel-plated steel shells provide corrosion resistance alternative to tin plating. ROHS3 compliance and REACH Unaffected status support regulatory requirements in restricted substance applications.

TE Connectivity AMP Connectors 338315 Series (2-338315-2, 5-338315-2, 6-338315-2): These connectors support 6A current rating, suitable for applications requiring higher current capacity than NorComp alternatives but lower than the original 7.5A specification. Operating temperature range of -55°C to 105°C provides extended low-temperature performance. The 2-338315-2 variant includes Board Lock features. Tin-plated steel shells match the original part finish. ROHS3 compliance and MSL 1 (Unlimited) rating support high-reliability applications.

Current Rating Considerations: The original L177DFB25SOL2RM8 is rated at 7.5A. NorComp 172-E series substitutes are rated at 5A, and TE Connectivity 338315 series substitutes are rated at 6A. Applications requiring the full 7.5A rating should retain the original part number.

Temperature Range Considerations: The original part operates from -55°C to 125°C. NorComp substitutes operate from -50°C to 100°C, and TE Connectivity substitutes operate from -55°C to 105°C. Applications requiring operation above 105°C should retain the original part number.

Frequently Asked Questions (FAQ)

Q: Can NorComp 172-E25 series connectors directly replace the L177DFB25SOL2RM8?

A: NorComp 172-E25 series connectors are functionally equivalent for 25-position D-Sub receptacle applications with solder termination and panel mount through-hole configuration. However, the current rating is reduced from 7.5A to 5A, and the maximum operating temperature is reduced from 125°C to 100°C. Verify that your application does not exceed these reduced specifications before substitution.

Q: What is the difference between 172-E25-213R001, 172-E25-213R011, 172-E25-213R031, and 172-E25-213R911?

A: These variants differ in flange feature configuration. The 172-E25-213R001 has an unthreaded housing/shell. The 172-E25-213R011 has a board-side 4-40 flange. The 172-E25-213R031 has a mating-side 4-40 flange. The 172-E25-213R911 includes both board-side and mating-side 4-40 flanges with female screwlock and Board Lock features. Select the variant matching your mechanical mounting requirements.

Q: How do TE Connectivity 338315 series connectors compare to the original L177DFB25SOL2RM8?

A: TE Connectivity 338315 series connectors maintain the 25-position D-Sub receptacle configuration with solder termination and through-hole mounting. Current rating is 6A (versus 7.5A original), and operating temperature range is -55°C to 105°C (versus -55°C to 125°C original). The 2-338315-2 variant includes Board Lock features matching the original part. Verify current and temperature requirements before substitution.

Q: What are the differences between 2-338315-2, 5-338315-2, and 6-338315-2?

A: These variants differ in flange feature configuration and packaging. The 2-338315-2 has an M3 housing/shell flange with Board Lock features and is packaged in bulk. The 5-338315-2 has an unthreaded housing/shell flange without Board Lock and is packaged in bulk. The 6-338315-2 has a 4-40 housing/shell flange without Board Lock and is packaged in trays. Select the variant matching your mechanical mounting and packaging requirements.

Q: Are all substitute parts RoHS compliant?

A: Yes. The original L177DFB25SOL2RM8 is RoHS Compliant. All NorComp 172-E25 series substitutes are ROHS3 Compliant. All TE Connectivity 338315 series substitutes are either RoHS Compliant or ROHS3 Compliant. All parts meet RoHS/ROHS3 requirements for restricted substance elimination.

Q: What is the significance of the contact finish thickness specification?

A: The original L177DFB25SOL2RM8 specifies gold contact finish at 30.0µin (0.76µm) thickness. NorComp 172-E25 series substitutes specify flash gold thickness, which is thinner than the original specification. TE Connectivity 338315 series substitutes do not specify contact finish thickness. Contact finish thickness affects durability and wear resistance in mating cycles. Applications requiring specific contact finish thickness should verify compatibility with the substitute part specification.

Q: Can I use these substitutes in high-reliability or aerospace applications?

A: All substitute parts are actively produced with UL94 V-0 flammability ratings and RoHS/ROHS3 compliance. However, high-reliability and aerospace applications typically require specific qualification and testing beyond standard commercial specifications. Consult application-specific requirements and manufacturer documentation before substitution in such applications.

Q: What packaging options are available for substitute parts?

A: The original L177DFB25SOL2RM8 packaging is not specified in the provided data. NorComp 172-E25 series substitutes are packaged in trays. TE Connectivity 338315 series substitutes are packaged in bulk (2-338315-2, 5-338315-2) or trays (6-338315-2). Verify packaging requirements for your procurement and assembly processes.

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