L77DFB25SOL2VF D-Sub 25-Position Receptacle Connector Equivalent & Substitute Parts

Part Overview

The L77DFB25SOL2VF is a 25-position D-Sub receptacle connector manufactured by Amphenol ICC (Commercial Products). This panel-mount, solder-termination connector with female sockets serves as the standard configuration in the DF series. The connector is currently active and widely deployed in applications requiring robust D-Sub connectivity with panel-mounted receptacle configurations. Alternative equivalent parts are necessary when the primary part is unavailable, to meet specific supply chain requirements, or when modified mechanical and electrical parameters better suit particular application needs without compromising core functionality.

Key Parameters

Parameter	L77DFB25SOL2VF Specification
Connector Style	D-Sub
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
Contact Material	Copper Alloy
Flange Feature	Mating Side, Female Screwlock (4-40)
Current Rating	7.5A
Voltage Rating	300V
Operating Temperature Range	-55°C to 155°C
Material Flammability Rating	UL94 V-0
Contact Form	Machined
Dielectric Material	Thermoplastic, Glass Filled
RoHS Status	RoHS Compliant
Moisture Sensitivity Level	MSL 1 (Unlimited)
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the L77DFB25SOL2VF are classified based on critical electrical and mechanical parameters that define functional equivalence. The primary parameters governing substitution are:

Core Substitution Criteria:

Connector style (D-Sub)
Connector type (Receptacle, Female Sockets)
Number of positions (25)
Number of rows (2)
Shell size and layout (3 / DB, B)
Termination method (Solder)
Material flammability rating (UL94 V-0)

Secondary Parameters with Allowable Variance:

Mounting type (Panel Mount, Through Hole variants acceptable)
Flange feature configuration (Mating side screwlock, board side, or unthreaded housing)
Shell material and finish (Steel with tin or nickel plating acceptable)
Contact finish (Gold plating acceptable)
Contact material (Copper alloy, brass, or phosphor bronze acceptable)
Current rating (5.0A to 7.5A range acceptable)
Operating temperature range (minimum -55°C acceptable; maximum 100°C to 155°C acceptable)
Dielectric material (Thermoplastic glass-filled or polyamide acceptable)
RoHS compliance (RoHS Compliant or ROHS3 Compliant acceptable)

Substitute parts that deviate from core criteria or exhibit non-compliant status are identified for specific application constraints.

Parameter Comparison

Part Number	Manufacturer	Connector Type	Positions	Rows	Shell Size	Mounting Type	Termination	Shell Material	Contact Material	Current (A)	Operating Temp (°C)	RoHS Status	Product Status
L77DFB25SOL2VF	Amphenol ICC	Receptacle, Female	25	2	3 (DB, B)	Panel Mount, Through Hole	Solder	Steel, Tin Plated	Copper Alloy	7.5	-55 to 155	RoHS Compliant	Active
172-E25-213R001	NorComp Inc.	Receptacle, Female	25	2	3 (DB, B)	Panel Mount, Through Hole	Solder	Steel, Nickel Plated	Brass	5.0	-50 to 100	ROHS3 Compliant	Active
172-E25-213R011	NorComp Inc.	Receptacle, Female	25	2	3 (DB, B)	Panel Mount, Through Hole	Solder	Steel, Nickel Plated	Brass	5.0	-50 to 100	ROHS3 Compliant	Active
172-E25-213R031	NorComp Inc.	Receptacle, Female	25	2	3 (DB, B)	Panel Mount, Through Hole	Solder	Steel, Nickel Plated	Brass	5.0	-50 to 100	ROHS3 Compliant	Active
172-E25-213R911	NorComp Inc.	Receptacle, Female	25	2	3 (DB, B)	Panel Mount, Through Hole	Solder	Steel, Nickel Plated	Brass	5.0	-50 to 100	ROHS3 Compliant	Active
2-338315-2	TE Connectivity AMP	Receptacle, Female	25	2	3 (DB, B)	Through Hole	Solder	Steel, Tin Plated	Phosphor Bronze	6.0	-55 to 105	ROHS3 Compliant	Active
2-747708-0	TE Connectivity AMP	Receptacle, Female	25	2	3 (DB, B)	Through Hole	Solder	Steel, Tin Plated	Phosphor Bronze	6.0	-55 to 105	RoHS non-compliant	Active
207828-3	TE Connectivity AMP	Receptacle, Female	25	2	3 (DB, B)	Through Hole	Solder	Not Specified	Phosphor Bronze	6.0	-55 to 105	RoHS non-compliant	Active
207828-4	TE Connectivity AMP	Receptacle, Female	25	2	3 (DB, B)	Through Hole	Solder	Not Specified	Phosphor Bronze	6.0	-55 to 105	RoHS non-compliant	Active
5-338315-2	TE Connectivity AMP	Receptacle, Female	25	2	3 (DB, B)	Through Hole	Solder	Steel, Tin Plated	Phosphor Bronze	6.0	-55 to 105	ROHS3 Compliant	Active
5207828-4	TE Connectivity AMP	Receptacle, Female	25	2	3 (DB, B)	Through Hole	Solder	Not Specified	Phosphor Bronze	6.0	-55 to 105	RoHS Compliant	Active

Engineering Selection Recommendations

NorComp 172-E Series (172-E25-213R001, 172-E25-213R011, 172-E25-213R031, 172-E25-213R911): These connectors provide direct functional equivalence for panel-mount applications. All parts are active products with ROHS3 compliance. The 172-E series uses nickel-plated steel shells and brass contacts, with current ratings of 5.0A. Operating temperature range is -50°C to 100°C, which covers standard industrial applications within the reduced upper temperature specification. Select from this series based on flange configuration requirements: unthreaded housing (172-E25-213R001), board-side screwlock (172-E25-213R011), mating-side screwlock (172-E25-213R031), or dual flange board and mating-side with board lock feature (172-E25-213R911).

TE Connectivity AMPLIMITE HDP-20 Series (2-338315-2, 5-338315-2): Both variants are active products with through-hole mounting and current ratings of 6.0A. The 2-338315-2 carries ROHS3 compliance, while 5-338315-2 carries ROHS3 compliance. These connectors feature phosphor bronze contacts and tin-plated steel shells, with operating range of -55°C to 105°C. The board lock feature is present. Current rating of 6.0A falls within the acceptable substitution range.

TE Connectivity AMPLIMITE HD-20 Series (2-747708-0, 207828-3, 207828-4, 5207828-4): These through-hole mounted connectors deliver 6.0A current rating with operating range of -55°C to 105°C. The 2-747708-0 and 207828 variants carry RoHS non-compliant status, limiting application to systems without RoHS mandates. The 5207828-4 variant achieves RoHS compliance and represents the preferred selection within this series when RoHS certification is required.

Compliance Constraints: Applications requiring RoHS compliance restrict selection to: NorComp 172-E series (all variants), TE Connectivity 2-338315-2, TE Connectivity 5-338315-2, and TE Connectivity 5207828-4. Applications without RoHS mandate can access the full substitute parts list.

Frequently Asked Questions (FAQ)

Q: Can I substitute the L77DFB25SOL2VF with a part that has a lower current rating? A: Yes. The substitute parts in the 5.0A to 6.0A range are acceptable. The L77DFB25SOL2VF specification of 7.5A provides headroom; applications drawing less than 5.0A continuous current can use substitutes rated at 5.0A or 6.0A without electrical degradation.

Q: What is the impact of operating temperature range differences? A: The L77DFB25SOL2VF operates from -55°C to 155°C. NorComp 172-E series connectors operate from -50°C to 100°C. If your application requires operation above 100°C or below -50°C, the L77DFB25SOL2VF or TE Connectivity AMPLIMITE variants (-55°C to 105°C) must be used. For standard industrial temperature ranges (-40°C to 85°C), all substitute parts are suitable.

Q: Are mounting type differences significant? A: The L77DFB25SOL2VF specifies Panel Mount and Through Hole mounting. Most substitute parts specify Through Hole mounting only. Panel mount capability depends on flange configuration (mating-side or board-side screwlock). Verify mechanical compatibility with your PCB layout and panel cutout dimensions before selection.

Q: Does shell material or finish affect electrical performance? A: Shell material (steel with tin or nickel plating) and contact material (copper alloy, brass, or phosphor bronze) do not affect electrical performance within this substitution context. Both tin and nickel platings provide equivalent EMI shielding and corrosion resistance. Select based on availability and cost considerations.

Q: What does RoHS compliance status mean for substitution? A: RoHS Compliant and ROHS3 Compliant status are equivalent for substitution purposes. RoHS non-compliant parts (2-747708-0, 207828-3, 207828-4) are functionally equivalent but restricted to applications and markets without RoHS mandates. Always confirm regulatory requirements before selecting a non-compliant part.

Q: Can I use a substitute part with a different contact finish thickness specification? A: Yes. Contact finish thickness (20.0µin, 30.0µin, or flash) does not affect functional compatibility. All variants provide adequate contact protection. Thickness differences reflect manufacturing process variations and do not impact performance within this connector category.

Q: How do I determine which NorComp 172-E variant to select? A: Selection depends on flange configuration requirements: 172-E25-213R001 (unthreaded housing) for standard through-hole mounting; 172-E25-213R011 (board-side 4-40 screwlock) for secure board mounting; 172-E25-213R031 (mating-side 4-40 screwlock) for secured mating connection; 172-E25-213R911 (dual flange with board lock) for applications requiring both board and mating-side security.

Q: Are inventory levels relevant to substitution decisions? A: Inventory levels indicate availability but do not determine electrical or mechanical compatibility. Use inventory information to confirm supply chain viability, but base substitution decisions solely on electrical and mechanical parameter compliance.

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