L77DBH25SAM4 Equivalent & Substitute Parts

Part Overview

The L77DBH25SAM4 is a 25-position D-Sub receptacle connector manufactured by Amphenol ICC (Commercial Products). This through-hole, right-angle solder connector features female sockets with gold-plated brass contacts and is designed for signal applications in industrial and commercial equipment. The connector maintains an active product status with 1134 units in current inventory. Alternative equivalent and substitute parts are identified to support procurement flexibility, supply chain continuity, and design compatibility across different manufacturing sources while maintaining electrical and mechanical performance requirements.

Substiute Parts

L77DBH25SAM4

Amphenol ICC (Commercial Products)In Stock: 1155L77DBH25SAM4 Datasheet

Current PartRFQ

L77DBH25SA

Amphenol ICC (Commercial Products)In Stock: 1135L77DBH25SA Datasheet

Parametric EquivalentRFQ

182-025-213R531

NorComp Inc.In Stock: 6683182-025-213R531 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the L77DBH25SAM4 are classified into two categories based on parametric alignment:

Parametric Equivalent (Direct Substitute): The L77DBH25SA shares identical electrical and mechanical specifications with the main part, including 25-position configuration, shell size 3 (DB, B), through-hole right-angle mounting, 7.5A current rating, 300V voltage rating, gold contact finish, and operating temperature range of -55°C to 125°C. Both parts are manufactured by Amphenol ICC and maintain RoHS compliance. This classification permits direct substitution without design modification.

Similar Substitute (Conditional Substitute): The 182-025-213R531 manufactured by NorComp Inc. maintains compatibility in core parameters including 25-position count, shell size 3 (DB, B), through-hole right-angle mounting, solder termination, and gold contact finish. However, this part differs in current rating (5A versus 7.5A), operating temperature maximum (105°C versus 125°C), shell material finish (nickel plated versus tin plated), and flange feature location (housing/shell versus board side). These differences require engineering evaluation for specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

L77DBH25SA Selection: This part is recommended as the primary substitute for the L77DBH25SAM4. Both parts are manufactured by Amphenol ICC with identical electrical specifications (7.5A current rating, 300V voltage rating, -55°C to 125°C operating range), mechanical configuration (25-position, shell size 3, through-hole right-angle), and compliance certifications (RoHS Compliant, UL94 V-0). The L77DBH25SA maintains equivalent contact finish specifications (8.00µin gold plating) and shell material finish (steel, tin plated). Direct substitution is supported without design modification. Current inventory of 1040 units supports procurement requirements.

182-025-213R531 Selection: This part is suitable as a secondary substitute when the L77DBH25SAM4 and L77DBH25SA are unavailable. Selection requires verification that application requirements accommodate the following parameter differences: reduced current rating (5A versus 7.5A), lower maximum operating temperature (105°C versus 125°C), nickel-plated shell finish (versus tin plated), and flash gold contact finish (versus 8.00µin specification). The flange feature location differs (housing/shell mounted versus board side mounted), which may affect PCB layout compatibility. This part maintains RoHS3 compliance and UL94 V-0 flammability rating. Significantly higher inventory availability (6654 units) supports extended procurement timelines.

Frequently Asked Questions (FAQ)

Q: Can L77DBH25SA be used as a direct replacement for L77DBH25SAM4?

A: Yes. The L77DBH25SA is a parametric equivalent with identical electrical and mechanical specifications. Both parts feature 25-position configuration, shell size 3 (DB, B), 7.5A current rating, 300V voltage rating, -55°C to 125°C operating temperature range, gold contact finish at 8.00µin thickness, and steel tin-plated shell material. Both are manufactured by Amphenol ICC and maintain RoHS compliance. Direct substitution is supported without design modification.

Q: What are the limitations of using 182-025-213R531 as a substitute?

A: The 182-025-213R531 has three significant parameter differences: (1) Current rating is reduced to 5A compared to 7.5A for the main part, requiring verification that application current requirements do not exceed 5A; (2) Maximum operating temperature is 105°C versus 125°C, limiting use in high-temperature applications; (3) Contact finish is flash gold rather than 8.00µin specification, which may affect contact durability in high-cycle applications. Additionally, the flange feature is located on the housing/shell rather than the board side, which may require PCB layout adjustment.

Q: Are all substitute parts RoHS compliant?

A: Yes. The L77DBH25SA is RoHS Compliant. The 182-025-213R531 is ROHS3 Compliant. Both certifications satisfy RoHS requirements for lead-free and restricted substance compliance.

Q: What is the difference between board-side and housing/shell flange features?

A: The flange feature determines mounting location on the PCB. Board-side flange (L77DBH25SAM4 and L77DBH25SA) mounts the connector directly to the PCB surface with 4-40 fasteners. Housing/shell flange (182-025-213R531) mounts the connector to the connector housing itself, which may require different PCB cutout geometry and mounting hole positioning.

Q: Which substitute part has the best inventory availability?

A: The 182-025-213R531 manufactured by NorComp Inc. has the highest inventory with 6654 units in stock, compared to 1040 units for L77DBH25SA and 1134 units for L77DBH25SAM4. However, inventory availability should be evaluated against parameter compatibility requirements for the specific application.

Q: Can I use 182-025-213R531 in applications requiring 7.5A current?

A: No. The 182-025-213R531 is rated for 5A maximum current. Applications requiring 7.5A current must use L77DBH25SAM4 or L77DBH25SA to ensure safe and reliable operation within rated specifications.

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

A: Contact finish thickness affects contact durability and wear resistance. The L77DBH25SAM4 and L77DBH25SA specify 8.00µin (0.203µm) gold plating, providing defined wear characteristics. The 182-025-213R531 specifies flash gold finish, which is a minimal coating thickness. Flash finish is suitable for low-cycle mating applications but may show accelerated wear in high-cycle connector mating environments.