L77DB25SAM4 Equivalent & Substitute Parts

Part Overview

The L77DB25SAM4 is a 25-position D-Sub receptacle connector manufactured by Amphenol ICC (Commercial Products). This female sockets connector features right-angle solder termination and is designed for through-hole mounting applications. The connector is currently in active production status with 741 pieces available in inventory.

D-Sub connectors of this configuration are widely used in industrial control systems, data acquisition equipment, and legacy computing interfaces. Equivalent and substitute parts become necessary when the primary manufacturer part is unavailable, when alternative sourcing is required for supply chain optimization, or when design flexibility permits the use of functionally compatible alternatives that meet the same electrical and mechanical specifications.

Substiute Parts

L77DB25SAM4

Amphenol ICC (Commercial Products)In Stock: 758L77DB25SAM4 Datasheet

Current PartRFQ

182-025-213R531

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

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of D-Sub connectors is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Connector type (Receptacle, Female Sockets)
• Number of positions (25)
• Shell size and layout (3 / DB, B)
• Mounting configuration (Through Hole, Right Angle)
• Termination method (Solder)
• Contact type (Signal)
• Number of rows (2)

Electrical Compatibility Parameters:

• Current rating must equal or exceed the original specification
• Voltage rating must equal or exceed the original specification
• Operating temperature range must encompass or match the original range
• Contact finish must provide equivalent electrical performance

Mechanical Compatibility Parameters:

• Backset spacing must be within acceptable tolerance
• Flange feature configuration must be compatible with mounting surface
• Shell material and finish must provide equivalent mechanical durability

The substitute part 182-025-213R531 from NorComp Inc. meets the mandatory matching parameters and maintains electrical compatibility within the specified operating envelope. Variations in shell finish material (nickel plated versus tin plated) and contact finish thickness (flash versus 8.00µin) do not preclude functional substitution when electrical performance requirements are satisfied.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection (L77DB25SAM4): The L77DB25SAM4 is recommended for applications requiring the full specified current rating of 7.5A, voltage rating of 300V, and extended operating temperature range to 125°C. This part is actively produced and maintains RoHS compliance. The tin-plated steel shell and unthreaded housing configuration provide the baseline specification for this connector class.

Substitute Part Selection (182-025-213R531): The 182-025-213R531 is suitable for applications where the current requirement does not exceed 5A and the maximum operating temperature does not exceed 105°C. This part is actively produced and maintains ROHS3 compliance. The nickel-plated steel shell and threaded 4-40 flange feature provide alternative mounting flexibility. The panel mount capability of this substitute offers additional installation options not present in the primary part.

Selection Criteria:

• If application current requirement exceeds 5A, the primary part L77DB25SAM4 is required.
• If application operating temperature exceeds 105°C, the primary part L77DB25SAM4 is required.
• If application voltage requirement exceeds the substitute specification, the primary part L77DB25SAM4 is required.
• If application permits panel mount configuration with threaded flange, the substitute part 182-025-213R531 offers equivalent functionality within its rated parameters.

Both parts maintain active production status and full regulatory compliance, ensuring long-term availability and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can the 182-025-213R531 be used as a direct replacement for the L77DB25SAM4 in all applications?

A: No. The substitute part has a lower current rating (5A versus 7.5A) and a narrower operating temperature range (-55°C to 105°C versus -55°C to 125°C). Applications requiring the full 7.5A current capacity or operation above 105°C must use the primary part L77DB25SAM4.

Q: What is the significance of the different shell finishes (tin plated versus nickel plated)?

A: Both tin and nickel plating provide corrosion resistance and electrical conductivity. The choice between them depends on environmental exposure and specific application requirements. Tin plating is standard for the primary part; nickel plating is standard for the substitute. Both finishes are suitable for general industrial applications.

Q: Are the backset spacing differences (0.319" versus 0.318") significant?

A: The difference of 0.001" (0.02mm) is within standard manufacturing tolerance for D-Sub connectors and does not affect mechanical or electrical compatibility.

Q: What does the threaded 4-40 flange feature on the substitute part provide?

A: The 4-40 threaded flange allows the connector to be secured to a panel or mounting surface using standard 4-40 fasteners. The primary part has an unthreaded housing shell, which may require alternative mounting methods. This feature difference permits the substitute to be used in panel mount applications.

Q: Are both parts RoHS compliant?

A: Yes. The primary part L77DB25SAM4 is RoHS Compliant. The substitute part 182-025-213R531 is ROHS3 Compliant. Both meet current regulatory requirements for hazardous substance restrictions.

Q: What is the inventory status for each part?

A: The primary part L77DB25SAM4 has 741 pieces in stock. The substitute part 182-025-213R531 has 6654 pieces in stock. The substitute offers significantly higher inventory availability.

Q: Can the substitute part be used in high-temperature applications?

A: No. The substitute part is rated for operation only to 105°C. Applications requiring operation above 105°C must use the primary part L77DB25SAM4, which is rated to 125°C.

Q: Are the contact materials equivalent between the two parts?

A: The primary part specifies brass contact material. The substitute part does not specify contact material in the provided data. Both parts specify gold contact finish, which provides equivalent electrical performance for signal applications.