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L177DFBH25ST D-Sub 25 Position Panel Mount Receptacle Connector
Part Overview
The L177DFBH25ST is a 25 position D-Sub receptacle connector manufactured by Amphenol ICC (Commercial Products). This connector features female sockets, panel mount through-hole termination, and solder attachment. The part is currently in active product status with 717 units in stock.
Equivalent and substitute parts are necessary when the primary part becomes unavailable, when design requirements demand alternative compliance certifications, or when specific flange configurations or material specifications are required for particular applications. This reference provides engineering-grade alternatives that maintain functional compatibility within the D-Sub 25 position receptacle category.
Substiute Parts
Key Parameters
| Parameter | L177DFBH25ST |
|---|---|
| Connector Type | Receptacle, Female Sockets |
| Number of Positions | 25 |
| Number of Rows | 2 |
| Shell Size, Connector Layout | 3 (DB, B) |
| Mounting Type | Panel Mount, Through Hole |
| Termination | Solder |
| Shell Material, Finish | Steel, Tin Plated |
| Contact Finish | Gold |
| Current Rating (Amps) | 7.5A |
| Voltage Rating | 300V |
| Operating Temperature | -55°C ~ 125°C |
| Material Flammability Rating | UL94 V-0 |
| RoHS Status | RoHS non-compliant |
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
Flange Configuration Parameters: Substitute parts may differ in flange feature type (Board Side 4-40, Housing/Shell M3, Housing/Shell 4-40, or Housing/Shell Unthreaded) while maintaining mechanical and electrical compatibility.
Performance Parameters: Current rating, voltage rating, and operating temperature ranges define the electrical envelope. Substitutes with equal or higher ratings are functionally equivalent. Contact material (Copper Alloy, Brass, or Phosphor Bronze) and contact finish (Gold or Flash) affect signal integrity and environmental resistance.
Compliance Parameters: RoHS status, REACH compliance, and flammability ratings determine suitability for specific regulatory environments. Active product status indicates ongoing manufacturer support.
Parameter Comparison
| Part Number | Manufacturer | Positions | Mounting Type | Flange Feature | Current Rating (A) | Voltage Rating (V) | Operating Temp (°C) | Shell Finish | Contact Material | Product Status | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|---|---|
| L177DFBH25ST | Amphenol ICC | 25 | Panel Mount, Through Hole | Board Side (4-40) | 7.5 | 300 | -55 ~ 125 | Steel, Tin Plated | Copper Alloy | Active | Non-compliant |
| 172-025-212R011 | NorComp Inc. | 25 | Panel Mount, Through Hole | Board Side (4-40) | 5 | — | -50 ~ 100 | Steel, Tin Plated | Brass | Obsolete | ROHS3 Compliant |
| 172-025-212R021 | NorComp Inc. | 25 | Panel Mount, Through Hole | Board Side (4-40) | 5 | — | -50 ~ 100 | Steel, Tin Plated | Brass | Obsolete | ROHS3 Compliant |
| 172-E25-213R001 | NorComp Inc. | 25 | Panel Mount, Through Hole | Housing/Shell (Unthreaded) | 5 | — | -50 ~ 100 | Steel, Nickel Plated | Brass | Active | ROHS3 Compliant |
| 172-E25-213R911 | NorComp Inc. | 25 | Panel Mount, Through Hole | Board Side (4-40), Mating Side Female Screwlock (4-40) | 5 | — | -50 ~ 100 | Steel, Nickel Plated | Brass | Active | ROHS3 Compliant |
| 2-338315-2 | TE Connectivity AMP | 25 | Through Hole | Housing/Shell (M3) | 6 | — | -55 ~ 105 | Steel, Tin Plated | Phosphor Bronze | Active | ROHS3 Compliant |
| 6-338315-2 | TE Connectivity AMP | 25 | Through Hole | Housing/Shell (4-40) | 6 | — | -55 ~ 105 | Steel, Tin Plated | Phosphor Bronze | Active | RoHS Compliant |
| D25S24A4GL00LF | Amphenol ICC (FCI) | 25 | Through Hole | Housing/Shell (M3) | 5 | 300 | -55 ~ 125 | Steel, Tin-Nickel Plated | Phosphor Bronze | Active | RoHS Compliant |
| D25S24A4GX00LF | Amphenol ICC (FCI) | 25 | Through Hole | Housing/Shell (4-40) | 5 | 300 | -55 ~ 125 | Steel, Tin-Nickel Plated | Phosphor Bronze | Active | RoHS Compliant |
| D25S24A4PL00LF | Amphenol ICC (FCI) | 25 | Through Hole | Housing/Shell (M3) | 5 | 300 | -55 ~ 125 | Steel, Tin-Nickel Plated | Phosphor Bronze | Active | RoHS Compliant |
| D25S24A4PX00LF | Amphenol ICC (FCI) | 25 | Through Hole | Housing/Shell (4-40) | 5 | 300 | -55 ~ 125 | Steel, Tin-Nickel Plated | Phosphor Bronze | Active | RoHS Compliant |
Engineering Selection Recommendations
Primary Substitutes (Amphenol ICC FCI Delta D Series):
The D25S24A4GL00LF, D25S24A4GX00LF, D25S24A4PL00LF, and D25S24A4PX00LF are functionally equivalent alternatives from the same manufacturer family. These parts maintain the 25 position, 2 row configuration, 300V voltage rating, and -55°C to 125°C operating temperature range. All are RoHS compliant and in active product status. Flange configuration differs (M3 or 4-40 Housing/Shell variants), allowing selection based on specific panel mounting requirements. Current rating is 5A per contact, which is lower than the primary part's 7.5A rating and should be verified against application requirements.
Secondary Substitutes (NorComp 172-E Series):
The 172-E25-213R001 and 172-E25-213R911 are active products with ROHS3 compliance. These parts feature nickel-plated steel shells and brass contacts. The 172-E25-213R911 includes board lock features and female screwlock mating side options. Operating temperature range is -50°C to 100°C, which is narrower than the primary part. Current rating is 5A. These substitutes are suitable for applications requiring RoHS3 compliance and do not require the full temperature or current envelope of the primary part.
Tertiary Substitutes (TE Connectivity AMPLIMITE HDP-20 Series):
The 2-338315-2 and 6-338315-2 are active products with ROHS3 compliance. These parts feature phosphor bronze contacts and tin-plated steel shells. Operating temperature range is -55°C to 105°C. Current rating is 6A. Flange configurations differ (M3 or 4-40 Housing/Shell variants). These substitutes are suitable when TE Connectivity supply chain preference or specific connector geometry is required.
Obsolete Alternatives (NorComp 172 Series):
The 172-025-212R011 and 172-025-212R021 are obsolete products with ROHS3 compliance. These parts are functionally similar but no longer in active production. Selection should be limited to legacy system maintenance or when existing inventory is available.
Frequently Asked Questions (FAQ)
Q: Can D25S24A4GL00LF replace L177DFBH25ST directly?
A: The D25S24A4GL00LF maintains the 25 position, 2 row D-Sub configuration, 300V voltage rating, and -55°C to 125°C operating temperature. However, the current rating is 5A per contact versus 7.5A for the primary part. Substitution is valid only if the application current requirement does not exceed 5A per contact. Flange configuration is Housing/Shell (M3) rather than Board Side (4-40), requiring panel mounting geometry verification.
Q: What is the difference between Board Side (4-40) and Housing/Shell (4-40) flange features?
A: Board Side (4-40) flange features are mounted directly to the PCB with 4-40 threaded holes. Housing/Shell (4-40) flange features are mounted to the connector housing with 4-40 threaded holes. These are mechanically distinct mounting configurations. Selection depends on the specific panel or enclosure mounting design.
Q: Are NorComp 172-E25 parts suitable for applications requiring -55°C operation?
A: The 172-E25-213R001 and 172-E25-213R911 have an operating temperature range of -50°C to 100°C. These parts are not rated for -55°C operation. Applications requiring -55°C minimum temperature must use the L177DFBH25ST, D25S24 series, or TE Connectivity AMPLIMITE HDP-20 series alternatives.
Q: What is the significance of RoHS compliance status?
A: RoHS non-compliant parts (L177DFBH25ST) contain restricted substances and are subject to regulatory restrictions in certain markets. ROHS3 compliant parts (NorComp 172 series) and RoHS compliant parts (Amphenol ICC FCI Delta D series, TE Connectivity AMPLIMITE HDP-20 series) meet EU Directive 2011/65/EU requirements. Selection depends on the target market and regulatory environment.
Q: Can I use a substitute part with lower current rating in my application?
A: Current rating substitution is application-dependent. If the maximum current per contact in your design is 5A or less, parts rated at 5A (NorComp 172 series, Amphenol ICC FCI Delta D series) are acceptable. If your design requires 6A or higher, only the L177DFBH25ST (7.5A) or TE Connectivity AMPLIMITE HDP-20 series (6A) are suitable.
Q: What contact material differences exist between substitutes?
A: The primary part uses Copper Alloy contacts. Substitutes use Brass (NorComp 172 series) or Phosphor Bronze (Amphenol ICC FCI Delta D series, TE Connectivity AMPLIMITE HDP-20 series). All materials support gold plating or flash gold finish for signal integrity. Contact material selection does not affect functional compatibility for standard D-Sub applications.
Q: Are packaging differences significant for component selection?
A: Packaging (Tray, Bulk, or Unspecified) affects logistics and handling but does not impact electrical or mechanical compatibility. All substitute parts are functionally equivalent regardless of packaging format.
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