L77DBG25SOL2RM8 D-Sub 25 Position Receptacle Equivalent & Substitute Parts

Part Overview

The L77DBG25SOL2RM8 is a 25 position D-Sub receptacle connector manufactured by Amphenol ICC (Commercial Products). This through-hole solder termination connector features female sockets in a vertical orientation with board-side M3 mounting and mating-side female screwlock provisions. The connector is classified as Active product status with 673 units in current inventory.

Substitute parts are necessary when the primary part becomes unavailable, when alternative mounting configurations are required, or when different compliance certifications are mandated for specific applications. The substitute parts listed maintain electrical and mechanical compatibility within the D-Sub 25 position receptacle category while offering variations in mounting type, shell finish, flange features, and regulatory compliance.

Substiute Parts

L77DBG25SOL2RM8

Amphenol ICC (Commercial Products)In Stock: 690L77DBG25SOL2RM8 Datasheet

Current PartRFQ

172-025-212R011

NorComp Inc.In Stock: 820172-025-212R011 Datasheet

SimilarRFQ

172-025-212R021

NorComp Inc.In Stock: 790172-025-212R021 Datasheet

SimilarRFQ

172-E25-213R001

NorComp Inc.In Stock: 1809172-E25-213R001 Datasheet

SimilarRFQ

172-E25-213R911

NorComp Inc.In Stock: 3371172-E25-213R911 Datasheet

SimilarRFQ

2-338315-2

TE Connectivity AMP ConnectorsIn Stock: 12162-338315-2 Datasheet

SimilarRFQ

6-338315-2

TE Connectivity AMP ConnectorsIn Stock: 18296-338315-2 Datasheet

SimilarRFQ

D25S24A4GL00LF

Amphenol ICC (FCI)In Stock: 1403D25S24A4GL00LF Datasheet

SimilarRFQ

D25S24A4GX00LF

Amphenol ICC (FCI)In Stock: 1336D25S24A4GX00LF Datasheet

SimilarRFQ

D25S24A4PL00LF

Amphenol ICC (FCI)In Stock: 1330D25S24A4PL00LF Datasheet

SimilarRFQ

D25S24A6GX00LF

Amphenol ICC (FCI)In Stock: 1895D25S24A6GX00LF Datasheet

SimilarRFQ

D25S24B4GV00LF

Amphenol ICC (FCI)In Stock: 1325D25S24B4GV00LF Datasheet

SimilarRFQ

D25S24B4PA00LF

Amphenol ICC (FCI)In Stock: 1140D25S24B4PA00LF Datasheet

SimilarRFQ

LD25S24A4GV00LF

Amphenol ICC (FCI)In Stock: 1768LD25S24A4GV00LF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution logic for D-Sub 25 position receptacle connectors is determined by the following critical parameters:

Mandatory Compatibility Parameters:

• Connector Type: Receptacle, Female Sockets
• Number of Positions: 25
• Number of Rows: 2
• Shell Size / Connector Layout: 3 (DB, B)
• Termination: Solder
• Contact Type: Signal

Conditional Substitution Parameters:

• Mounting Type: Through Hole or Panel Mount, Through Hole (both support PCB integration)
• Flange Feature: Variations in board-side and mating-side mounting provisions are acceptable based on application requirements
• Shell Material / Finish: Steel with tin plating or nickel plating are functionally equivalent
• Contact Finish: Gold plating is maintained across all substitutes
• Current Rating: Substitutes with equal or higher current capacity are acceptable
• Voltage Rating: Substitutes with equal or higher voltage rating are acceptable
• Operating Temperature Range: Substitutes with equal or wider temperature range are acceptable
• RoHS Compliance: Substitutes may differ in RoHS status based on application regulatory requirements

Substitute parts are grouped into three categories: NorComp Inc. panel-mount variants (172 series), TE Connectivity through-hole variants (AMPLIMITE HDP-20 series), and Amphenol ICC Delta D series variants. Each group maintains the core 25 position D-Sub receptacle configuration while offering distinct flange mounting options and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Active Product Status, Highest Compatibility):

The D25S24A4GX00LF, D25S24A6GX00LF, and D25S24A4GL00LF from the Amphenol ICC Delta D series are the preferred substitutes. These parts maintain the through-hole mounting configuration, support the full operating temperature range (-55°C ~ 125°C), and carry 300V voltage rating equivalent to the main part. All three are RoHS Compliant and Active product status. The D25S24A6GX00LF offers board lock features and 4-40 flange mounting, while D25S24A4GL00LF provides M3 board-side mounting with board lock. D25S24A4PL00LF is functionally equivalent but lacks board lock features.

Secondary Substitutes (Active Product Status, TE Connectivity):

The 2-338315-2 and 6-338315-2 from TE Connectivity AMPLIMITE HDP-20 series maintain through-hole mounting and support the full operating temperature range. Both are Active product status and RoHS Compliant. The 2-338315-2 features M3 housing/shell mounting with board lock, while 6-338315-2 provides 4-40 housing/shell mounting. Current rating is 6A, which is lower than the main part's 7.5A specification.

Tertiary Substitutes (Panel Mount Configuration, NorComp Inc.):

The 172-E25-213R001 and 172-E25-213R911 are Active product status alternatives with panel mount capability. Both are ROHS3 Compliant and feature nickel-plated steel shells. The 172-E25-213R911 includes board lock features with 4-40 mating-side female screwlock provisions. These parts operate at -50°C ~ 100°C, which is narrower than the main part. Current rating is 5A.

Obsolete Alternatives (Not Recommended for New Designs):

The 172-025-212R011 and 172-025-212R021 from NorComp Inc. are marked Obsolete product status and should not be selected for new designs. These parts are retained in the substitute list for legacy system maintenance only.

Frequently Asked Questions (FAQ)

Q: Can D25S24A4GX00LF directly replace L77DBG25SOL2RM8 in existing designs?

A: The D25S24A4GX00LF maintains all critical electrical and mechanical parameters: 25 position D-Sub receptacle, female sockets, through-hole solder termination, 300V voltage rating, and -55°C ~ 125°C operating temperature. The primary difference is the flange feature: D25S24A4GX00LF uses 4-40 housing/shell mounting versus the L77DBG25SOL2RM8's M3 board-side and mating-side provisions. PCB layout modifications may be required to accommodate the different mounting hole pattern.

Q: What is the difference between the TE Connectivity 2-338315-2 and 6-338315-2?

A: Both parts are functionally equivalent 25 position D-Sub receptacles with through-hole solder termination. The 2-338315-2 features M3 housing/shell mounting with board lock, while the 6-338315-2 provides 4-40 housing/shell mounting without board lock. Selection depends on the specific flange mounting requirements of the application.

Q: Why do NorComp 172 series parts show lower current ratings?

A: NorComp 172 series parts are rated at 5A per contact, compared to the L77DBG25SOL2RM8's 7.5A rating. This difference reflects the contact design and material specifications of each manufacturer. Applications requiring the full 7.5A capacity should select substitutes with equivalent or higher current ratings.

Q: Are the NorComp 172-E25 series suitable for new product designs?

A: Yes, the 172-E25-213R001 and 172-E25-213R911 are Active product status and ROHS3 Compliant, making them suitable for new designs. However, the operating temperature range (-50°C ~ 100°C) is narrower than the L77DBG25SOL2RM8 (-55°C ~ 125°C). Verify that the application's temperature requirements fall within this range before selection.

Q: What is the significance of the board lock feature?

A: The board lock feature, present on L77DBG25SOL2RM8, 2-338315-2, D25S24A4GX00LF, D25S24A6GX00LF, and 172-E25-213R911, provides mechanical retention of the connector to the PCB. This feature prevents accidental disconnection during handling or vibration. Parts without board lock (D25S24A4PL00LF, 6-338315-2, 172-025-212R011, 172-025-212R021, 172-E25-213R001) may require alternative mechanical retention methods.

Q: How do shell finish variations affect connector performance?

A: The L77DBG25SOL2RM8 uses tin-plated steel, while substitutes offer tin-plated, tin-nickel plated, or nickel-plated finishes. All finishes provide corrosion resistance and electrical conductivity. Selection depends on environmental exposure and specific application requirements. Nickel plating offers enhanced corrosion resistance in harsh environments.

Q: What is the difference between through-hole and panel mount configurations?

A: Through-hole mounting (L77DBG25SOL2RM8, TE Connectivity, and Amphenol Delta D series) integrates the connector directly into the PCB via solder pads. Panel mount (NorComp 172 series) allows the connector to be mounted on an external panel or enclosure with the flange secured to the panel surface. Through-hole mounting is more compact; panel mount provides external accessibility.

Q: Are all substitute parts RoHS Compliant?

A: No. The L77DBG25SOL2RM8 is RoHS non-compliant. Most substitutes are RoHS Compliant or ROHS3 Compliant, except for the obsolete NorComp 172-025 series. For applications requiring RoHS compliance, select from the active product status alternatives: Amphenol Delta D series, TE Connectivity AMPLIMITE HDP-20 series, or NorComp 172-E25 series.

Q: Can I use a substitute with a lower current rating in my application?

A: Substitutes with lower current ratings (5A or 6A versus 7.5A) can be used only if the actual circuit current does not exceed the substitute's rating. Exceeding the rated current causes excessive heat generation and connector degradation. Verify the maximum circuit current before selecting a lower-rated substitute.

Q: What packaging options are available for these connectors?

A: The L77DBG25SOL2RM8 is supplied in bulk packaging. Substitutes are available in bulk (2-338315-2), tray (6-338315-2, D25S24 series, NorComp 172 series), or other packaging configurations. Packaging selection affects handling, storage, and integration into manufacturing processes but does not affect electrical or mechanical performance.