L77DFB25SMP40 Equivalent & Substitute Parts

Part Overview

The L77DFB25SMP40 is a 25-position D-Sub receptacle connector manufactured by Amphenol ICC (Commercial Products). This female socket connector features a straight solder termination and is designed for signal applications requiring reliable electrical connections in industrial and commercial environments. The connector maintains Active product status with 690 units in current inventory.

Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across connector geometry, contact configuration, and performance ratings. Alternative models may be required due to inventory availability, specific termination requirements, or application-specific mounting constraints.

Substiute Parts

L77DFB25SMP40

Amphenol ICC (Commercial Products)In Stock: 721L77DFB25SMP40 Datasheet

Current PartRFQ

DBP25S065TLF

Amphenol ICC (FCI)In Stock: 1153DBP25S065TLF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the L77DFB25SMP40 is determined by strict equivalence in the following critical parameters:

Mandatory Equivalence Parameters:

• Connector Style: D-Sub
• Connector Type: Receptacle, Female Sockets
• Number of Positions: 25
• Number of Rows: 2
• Shell Size, Connector Layout: 3 (DB, B)
• Contact Type: Signal
• Shell Material, Finish: Steel, Tin Plated
• Contact Finish: Gold
• Current Rating: 7.5A minimum
• Voltage Rating: 300V minimum
• Material Flammability Rating: UL94 V-0
• RoHS Compliance: Required

The DBP25S065TLF meets all mandatory equivalence parameters while introducing variations in termination method (solder cup versus straight solder), contact finish thickness (30.0µin versus 20.0µin), and maximum operating temperature (125°C versus 155°C). These variations represent functional alternatives within the D-Sub 25-position receptacle category.

Parameter Comparison

Engineering Selection Recommendations

L77DFB25SMP40 Selection Criteria:

• Applications requiring operating temperatures up to 155°C
• Direct solder termination to PCB or cable assemblies
• Voltage requirements up to 300V
• Active product status with established supply chain

DBP25S065TLF Selection Criteria:

• Applications with maximum operating temperature of 125°C
• Solder cup termination for wire-to-connector applications
• Higher voltage rating (1000V) for applications exceeding 300V requirements
• Thicker gold contact finish (30.0µin) for enhanced durability in high-cycle mating environments
• Higher current inventory availability (1114 units)

Both parts maintain RoHS compliance, UL94 V-0 flammability rating, and unlimited moisture sensitivity level (MSL 1). Selection between these alternatives depends on termination method compatibility with the end application and operating temperature constraints.

Frequently Asked Questions (FAQ)

Q: Can DBP25S065TLF replace L77DFB25SMP40 in all applications?

A: DBP25S065TLF is electrically and mechanically compatible for applications operating at or below 125°C. Applications requiring operation above 125°C must use L77DFB25SMP40. Termination method differences (solder cup versus straight solder) require verification of assembly compatibility.

Q: What is the difference between solder and solder cup termination?

A: L77DFB25SMP40 uses straight solder termination for direct PCB mounting. DBP25S065TLF uses solder cup termination for wire-to-connector soldering. These termination methods are not interchangeable and require different assembly processes.

Q: Are both connectors RoHS compliant?

A: Yes. Both L77DFB25SMP40 and DBP25S065TLF are RoHS compliant and maintain UL94 V-0 flammability rating.

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

A: L77DFB25SMP40 has 20.0µin (0.51µm) gold plating, while DBP25S065TLF has 30.0µin (0.76µm). Thicker plating in DBP25S065TLF provides enhanced contact durability in high-cycle mating applications.

Q: Can these connectors be used interchangeably based on voltage rating?

A: No. While DBP25S065TLF has a higher voltage rating (1000V versus 300V), this does not make it a universal substitute. The 125°C maximum operating temperature of DBP25S065TLF is the limiting factor for high-temperature applications.

Q: What packaging formats are available?

A: L77DFB25SMP40 packaging is not specified in available documentation. DBP25S065TLF is supplied in Tray packaging.