L77DFB25SOL2R063 Equivalent & Substitute Parts

Part Overview

The L77DFB25SOL2R063 is a 25-position D-Sub receptacle connector manufactured by Amphenol ICC (Commercial Products). This panel mount, solder-termination connector features female socket contacts and is designated as an active product in the DF series. Substitute parts are necessary to accommodate varying application requirements, including different mounting configurations, contact materials, temperature ranges, and compliance certifications while maintaining the core 25-position D-Sub functionality.

Key Parameters

Parameter	Specification
Connector Type	Receptacle, Female Sockets
Number of Positions	25
Shell Size / Connector Layout	3 (DB, B)
Number of Rows	2
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 ~ 155°C
Material Flammability Rating	UL94 V-0
RoHS Status	RoHS Compliant

Substitute Part Grouping Explanation

Substitution criteria for the L77DFB25SOL2R063 are determined by the following key parameters:

Core Functional Parameters (Must Match):

Connector type: Receptacle, Female Sockets
Number of positions: 25
Shell size and connector layout: 3 (DB, B)
Number of rows: 2
Termination method: Solder
Connector style: D-Sub

Tolerances and Trade-offs:

Current rating: Substitute parts must equal or exceed 5A minimum
Operating temperature: Substitute parts must cover application temperature requirements within -55°C to +155°C range
Mounting configuration: Both panel mount and through-hole through-hole mounting options are acceptable depending on application layout
Flange features: Variations in flange design (unthreaded, board-side, mating-side) are acceptable based on mechanical assembly requirements
Contact material: Brass or Copper Alloy acceptable with gold or flash gold finish
Shell finish: Steel with Nickel or Tin plating acceptable

Compliance Parameters:

RoHS/ROHS3 compliance acceptable for regulatory environments requiring such certification
Moisture sensitivity level: MSL 1 (Unlimited) preferred but MSL-independent options available

Parameter Comparison

Parameter	L77DFB25SOL2R063 (Amphenol ICC)	172-E25-213R001 (NorComp)	172-E25-213R011 (NorComp)	172-E25-213R031 (NorComp)	172-E25-213R911 (NorComp)	2-338315-2 (TE Connectivity)	2-747708-0 (TE Connectivity)	207828-3 (TE Connectivity)	207828-4 (TE Connectivity)	5-338315-2 (TE Connectivity)	5207828-4 (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 / 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)
Number of Rows	2	2	2	2	2	2	2	2	2	2	2
Termination	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder
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
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)
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 Material	Copper Alloy	Brass	Brass	Brass	Brass	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze
Contact Finish	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold
Contact Finish Thickness	20.0µin (0.51µm)	Flash	Flash	Flash	Flash	Not Specified	30.0µin (0.76µm)	Flash	30.0µin (0.76µm)	Not Specified	30.0µin (0.76µm)
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 ~ 155°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
Color	Black	White	White	White	White	Black	Black	Black	Black	Black	Black
Moisture Sensitivity Level (MSL)	1 (Unlimited)	Not Applicable	Not Applicable	Not Applicable	Not Applicable	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

RoHS Compliance Tier:

Parts 172-E25-213R001, 172-E25-213R011, 172-E25-213R031, 172-E25-213R911, 2-338315-2, 5-338315-2, and 5207828-4 carry ROHS3 or RoHS Compliant certifications, making them suitable for applications with regulatory mandates requiring lead-free manufacturing and restricted substance compliance.

Parts 2-747708-0, 207828-3, and 207828-4 are RoHS non-compliant and carry REACH Affected status, restricting their use in regulated markets.

Temperature Performance:

The L77DFB25SOL2R063 operates from -55°C to 155°C. All NorComp substitutes (172-E25 series) operate from -50°C to 100°C, limiting their application in high-temperature environments exceeding 100°C. TE Connectivity parts (2-338315-2, 2-747708-0, 207828-3, 207828-4, 5-338315-2, 5207828-4) extend to -55°C to 105°C, covering the lower temperature threshold but not the upper limit of the original part.

Current and Voltage Ratings:

The L77DFB25SOL2R063 provides 7.5A at 300V. NorComp alternatives deliver 5A with unspecified voltage rating. TE Connectivity alternatives deliver 6A with voltage ratings between 125V and unspecified. Current rating degradation from 7.5A to 5A or 6A requires thermal and current-load verification for the specific application.

Mounting Configuration:

NorComp parts maintain panel mount capability as specified. TE Connectivity options provide through-hole mounting only, requiring mechanical redesign if panel-mount flange engagement is required.

Frequently Asked Questions (FAQ)

Q: Can NorComp 172-E25 series parts directly replace the L77DFB25SOL2R063?

A: NorComp parts are electrically compatible for 25-position D-Sub solder-terminated applications with 5A current capacity. However, operating temperature is limited to -50°C to 100°C versus the original part's -55°C to 155°C range. Panel mounting capability is maintained with unthreaded housing flanges. ROHS3 compliance is available for regulated markets.

Q: What are the key differences between NorComp and TE Connectivity substitutes?

A: NorComp parts provide 5A current rating with panel-mount options. TE Connectivity parts provide 6A current rating with through-hole mounting configuration. TE Connectivity options feature phosphor bronze contacts versus NorComp's brass contacts. Operating temperature extends to -55°C on TE parts (matching the original's lower limit) but only to 105°C at maximum. NorComp parts carry ROHS3 certification; TE Connectivity options include both RoHS-compliant and non-compliant variants.

Q: Are flange feature variations functionally significant?

A: Flange features determine mechanical attachment method. Unthreaded housings provide simple snap-fit or friction retention. Board-side and mating-side flanges with threaded inserts (4-40) enable screw-locked assembly for vibration-resistant applications. The 172-E25-213R911 offers dual flanges (board-side and mating-side screwlock) for board-lock functionality. Part selection depends on mechanical assembly requirements, not electrical performance.

Q: Which substitute provides the best thermal match to the L77DFB25SOL2R063?

A: All substitute parts have lower maximum operating temperature than the original specification (-55°C to 155°C). TE Connectivity options match the lower temperature limit (-55°C) but reach only 105°C maximum. NorComp options reach -50°C to 100°C. For applications requiring operation above 105°C, the original L77DFB25SOL2R063 part number should be retained.

Q: Are contact material differences (Copper Alloy vs. Brass vs. Phosphor Bronze) functionally equivalent?

A: Copper-based alloys (Copper Alloy, Brass, Phosphor Bronze) are all acceptable for signal-level D-Sub applications with gold plating. All provided parts feature gold or flash-gold contact finish, providing equivalent electrical conductivity and contact reliability. Material differences reflect manufacturing tradition rather than functional performance change for this connector type.

Q: What is the impact of voltage rating differences?

A: The L77DFB25SOL2R063 specifies 300V. NorComp parts do not specify voltage rating; TE Connectivity parts specify 125V. For signal-level applications operating below 125V, all alternatives are acceptable. Applications exceeding 125V voltage stress require either the original part or confirmation of NorComp voltage specification from the manufacturer.

Q: How does the transition from panel-mount to through-hole affect application design?

A: Panel-mount designs (L77DFB25SOL2R063, NorComp 172-E25 series) secure the connector to the equipment enclosure faceplate via the flange. Through-hole designs (TE Connectivity series) require mounting bracket or printed circuit board integration. Mechanical redesign of the mounting interface is required when transitioning to through-hole options.

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