L177DFBF25SC D-Sub Receptacle 25 Position Equivalent & Substitute Parts

Part Overview

The L177DFBF25SC is a 25 position D-Sub receptacle connector manufactured by Amphenol ICC (Commercial Products). This connector features female sockets in a right-angle, panel-mount configuration with solder termination. The part is currently in active product status with 859 units in stock.

Substitute parts become necessary when the primary part experiences extended lead times, inventory constraints, or when design requirements permit alternative manufacturers meeting equivalent electrical and mechanical specifications. The 174-025-212R141 from NorComp Inc. is identified as a functional substitute, though it carries an obsolete product status designation.

Substiute Parts

L177DFBF25SC

Amphenol ICC (Commercial Products)In Stock: 902L177DFBF25SC Datasheet

Current PartRFQ

174-025-212R141

NorComp Inc.In Stock: 1186174-025-212R141 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for D-Sub receptacle connectors is determined by strict alignment of the following parameters:

Critical Matching Parameters:

• Connector style (D-Sub)
• Connector type (Receptacle, Female Sockets)
• Number of positions (25)
• Number of rows (2)
• Shell size and layout (3 / DB, B)
• Mounting type (Panel Mount, Through Hole, Right Angle)
• Termination method (Solder)
• Shell material and finish (Steel, Tin Plated)
• Contact finish (Gold)
• Flammability rating (UL94 V-0)

Allowable Variations:

• Contact finish thickness (30.0µin vs. Flash)
• Current rating (7.5A vs. 5A)
• Backset spacing (0.319" vs. 0.370")
• Operating temperature range (-55°C ~ 125°C vs. -50°C ~ 100°C)
• Dielectric material composition (Thermoplastic, Glass Filled vs. Polybutylene Terephthalate)
• Contact material (Copper Alloy vs. Brass)
• Flange feature design (Housing/Shell vs. Mating Side, Female Screwlock)
• Color (Black vs. Beige)

The 174-025-212R141 meets all critical matching parameters and is therefore classified as a functional substitute despite differences in the allowable variation categories.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: L177DFBF25SC

The L177DFBF25SC is the recommended primary choice for new designs and procurement. This part maintains active product status with Amphenol ICC, ensuring long-term availability and manufacturer support. The connector meets RoHS compliance requirements and carries a higher current rating (7.5A) and extended operating temperature range (-55°C ~ 125°C), providing greater design margin for demanding applications.

Substitute Selection: 174-025-212R141

The 174-025-212R141 from NorComp Inc. is classified as an obsolete product. While it satisfies all critical electrical and mechanical compatibility parameters for D-Sub 25 position receptacle applications, its obsolete status indicates discontinued manufacturing and limited future availability. This part is suitable only for replacement or repair of existing systems where the connector is already in service.

Selection of the NorComp substitute should be limited to scenarios where:

• Existing inventory of 174-025-212R141 is available (1137 units in stock)
• The application does not require the extended temperature range or higher current rating of the Amphenol part
• The design accommodates the 0.370" backset spacing and female screwlock flange feature
• Long-term supply chain continuity is not a design requirement

Both parts comply with UL94 V-0 flammability standards and carry appropriate RoHS certifications for their respective manufacturing periods.

Frequently Asked Questions (FAQ)

Q: Can the 174-025-212R141 be used as a direct replacement for the L177DFBF25SC in new designs?

A: The 174-025-212R141 meets all critical D-Sub 25 position receptacle specifications and is electrically and mechanically compatible. However, its obsolete product status makes it unsuitable for new designs. The L177DFBF25SC is the appropriate choice for new applications due to active product status and extended performance specifications.

Q: What are the key differences between these two connectors?

A: The primary differences are: (1) Product status—L177DFBF25SC is active while 174-025-212R141 is obsolete; (2) Current rating—7.5A vs. 5A; (3) Operating temperature range—-55°C ~ 125°C vs. -50°C ~ 100°C; (4) Backset spacing—0.319" vs. 0.370"; (5) Flange design—unthreaded housing vs. female screwlock; (6) Dielectric material—glass-filled thermoplastic vs. PBT polyester; (7) Contact material—copper alloy vs. brass.

Q: Are there any compatibility concerns with the different backset spacing values?

A: Yes. The backset spacing difference (0.319" vs. 0.370") affects the connector's depth when mounted to a panel. This dimension must be verified against the specific application's panel thickness and available mounting depth. The two connectors are not interchangeable in space-constrained installations.

Q: Does the lower current rating of the 174-025-212R141 affect substitution eligibility?

A: The 5A current rating of the 174-025-212R141 is lower than the 7.5A rating of the L177DFBF25SC. Substitution is permissible only in applications where the actual current draw does not exceed 5A. Applications requiring the full 7.5A capacity must use the L177DFBF25SC.

Q: What is the significance of the different flange features?

A: The L177DFBF25SC features an unthreaded housing shell, while the 174-025-212R141 includes a female screwlock (4-40) on the mating side. This affects the mechanical mounting interface and mating connector compatibility. Verify that the mating connector design accommodates the specific flange feature of the selected part.

Q: Are both connectors RoHS compliant?

A: Yes. The L177DFBF25SC is RoHS Compliant, and the 174-025-212R141 is ROHS3 Compliant. Both meet current environmental compliance requirements for their respective manufacturing standards.

Q: What is the inventory status for each part?

A: The L177DFBF25SC has 859 units in stock, and the 174-025-212R141 has 1137 units in stock. Both are available for immediate procurement from current inventory.