Equivalent & Substitute Parts for L77DB25SAJ4

Part Overview

The L77DB25SAJ4 is a 25 Position D-Sub Receptacle connector manufactured by Amphenol ICC, featuring female sockets with right-angle, through-hole solder termination. This connector is currently Active in product status. Alternative components become necessary when specific operational requirements, compliance mandates, or availability constraints require substitution while maintaining mechanical and electrical compatibility within the D-Sub 25-position receptacle category.

Substiute Parts

L77DB25SAJ4

Amphenol ICC (Commercial Products)In Stock: 812L77DB25SAJ4 Datasheet

Current PartRFQ

173-E25-213R001

NorComp Inc.In Stock: 1275173-E25-213R001 Datasheet

SimilarRFQ

174-E25-211R001

NorComp Inc.In Stock: 1217174-E25-211R001 Datasheet

SimilarRFQ

174-E25-211R141

NorComp Inc.In Stock: 1041174-E25-211R141 Datasheet

SimilarRFQ

174-E25-211R241

NorComp Inc.In Stock: 1127174-E25-211R241 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of D-Sub 25-position receptacle connectors is governed by alignment in the following critical parameters:

• Connector Configuration: All substitutes maintain 25 positions in 2-row arrangement with Shell Size 3 (DB, B) layout
• Mounting Type: All substitutes employ through-hole, right-angle configuration for PCB integration
• Termination Method: All substitutes utilize solder termination
• Connector Type: All substitutes are female-socket receptacles
• Environmental Rating: All substitutes meet UL94 V-0 flammability classification
• Contact Form: All substitutes employ machined contacts

Variations between the main part and substitutes occur in the following parameters: current rating, backset spacing, shell material finish, contact finish thickness, voltage rating, operating temperature range, dielectric material composition, and product status (Active versus Obsolete). These variations determine suitability for specific applications and regulatory environments.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: L77DB25SAJ4 (Current Part)

The L77DB25SAJ4 remains the preferred selection for new designs. This part maintains Active product status, full RoHS Compliance, and the highest current rating (7.5A) among available options. The specified voltage rating of 300V and extended operating temperature range (-55°C to 125°C) provide margin in high-reliability applications.

Secondary Recommendation: 173-E25-213R001 (NorComp Inc.)

The 173-E25-213R001 offers Active product status and ROHS3 Compliance, supporting modern regulatory requirements. This substitute is suitable for applications where the 5A current rating is sufficient. The slightly reduced backset spacing (0.283" versus 0.319") requires verification against PCB layout constraints. Operating temperature range matches the primary part (-55°C to 125°C).

Alternative Options: 174-E25-211R001, 174-E25-211R141, 174-E25-211R241 (NorComp Inc.)

These three NorComp alternatives carry Obsolete product status and RoHS non-compliance. Selection of these parts is restricted to legacy system maintenance where original part compatibility is mandated. The reduced operating temperature range (-50°C to 100°C) and absence of specified voltage rating eliminate these options from new designs or applications requiring modern compliance certifications.

Frequently Asked Questions (FAQ)

Q: Can the 173-E25-213R001 directly replace the L77DB25SAJ4 in existing designs?

A: Mechanical and electrical compatibility exists at the connector interface level, provided that the reduced current rating (5A versus 7.5A) and backset spacing variation (0.283" versus 0.319") do not conflict with circuit requirements or PCB layout. Verification of backset spacing tolerance against board dimensions is required.

Q: What is the impact of shell material finish differences between substitutes?

A: Shell material finish variations (Tin Plated, Nickel Plated, Yellow Chromate Plated) affect corrosion resistance and mating force characteristics over the component lifetime. Selection should align with environmental exposure conditions and expected connector mating cycles within the application.

Q: Why do three NorComp alternatives carry Obsolete product status?

A: The 174-E25-211R001, 174-E25-211R141, and 174-E25-211R241 have been discontinued by the manufacturer. These parts remain available from inventory but are not recommended for new product development. Use is limited to replacement applications in legacy systems where original part specifications are required.

Q: Are the NorComp substitutes RoHS compliant?

A: The 173-E25-213R001 is ROHS3 Compliant. The three 174-E series parts (174-E25-211R001, 174-E25-211R141, 174-E25-211R241) are RoHS non-compliant and unsuitable for applications subject to RoHS Directive requirements.

Q: What mounting configuration differences exist between substitutes?

A: The primary L77DB25SAJ4 specifies Through Hole, Right Angle mounting. The NorComp substitutes (173-E25-213R001, 174-E25-211R001, 174-E25-211R141, 174-E25-211R241) support Panel Mount in addition to Through Hole, Right Angle mounting, providing increased application flexibility. Mechanical mounting compatibility must be verified for the specific application.

Q: How do operating temperature ranges affect part selection?

A: The L77DB25SAJ4 and 173-E25-213R001 both support -55°C to 125°C operation. The three 174-E series parts support only -50°C to 100°C, reducing operational envelope. Applications with temperature extremes outside the -50°C to 100°C range exclude the obsolete NorComp alternatives.

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