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L77DFBH25SOL2RM5 D-Sub 25 Position Receptacle Connector
Part Overview
The L77DFBH25SOL2RM5 is a 25 position D-Sub receptacle connector manufactured by Amphenol ICC (Commercial Products), classified as a D-Sub, D-Shaped connector for general signal applications. This connector is actively produced and stocked with 964 units in inventory. Finding equivalent and substitute parts addresses the need for design flexibility, supply chain redundancy, and compatibility with alternative sourcing strategies across multiple manufacturers including NorComp Inc. and TE Connectivity AMP Connectors.
Substiute Parts
Key Parameters
| Parameter | L77DFBH25SOL2RM5 (Main Part) |
|---|---|
| Manufacturer | Amphenol ICC (Commercial Products) |
| Connector Type | Receptacle, Female Sockets |
| Number of Positions | 25 |
| Shell Size, Connector Layout | 3 (DB, B) |
| Mounting Type | Panel Mount, Through Hole |
| Flange Feature | Board Side (4-40) |
| Termination | Solder |
| Shell Material, Finish | Steel, Tin Plated |
| Contact Finish | Gold |
| Contact Finish Thickness | 20.0µin (0.51µm) |
| Material Flammability Rating | UL94 V-0 |
| Current Rating | 7.5A |
| Voltage Rating | 300V |
| Operating Temperature Range | -55°C ~ 125°C |
| Contact Material | Copper Alloy |
| Dielectric Material | Thermoplastic, Glass Filled |
| RoHS Status | RoHS Compliant |
| Product Status | Active |
Substitute Part Grouping Explanation
Substitution is permissible for the L77DFBH25SOL2RM5 based on the following alignment criteria:
Critical Matching Parameters:
- 25 positions in 2-row configuration (3/DB shell size)
- D-Sub receptacle style with female socket contacts
- Solder termination method
- Panel mount or through-hole mounting capability
- UL94 V-0 flammability rating
Acceptable Variance Parameters:
- Shell finish (tin or nickel plating acceptable with proper EMI performance)
- Contact finish (gold or flash plating acceptable)
- Contact material (copper alloy, brass, or phosphor bronze acceptable)
- Current rating (minimum 5A; 7.5A main part tolerates lower ratings for less demanding applications)
- Operating temperature (range minimum -50°C, maximum 100°C; main part operates -55°C to 125°C)
- Dielectric material composition (thermoplastic or polyamide acceptable)
Non-Interchangeable Parameters:
- Connector position count (must remain 25)
- Connector layout and shell size (must remain 3/DB/B)
- Connector type (must remain receptacle, female sockets)
Parameter Comparison
| Parameter | L77DFBH25SOL2RM5 | 172-E25-213R001 | 172-E25-213R011 | 172-E25-213R031 | 172-E25-213R911 | 2-338315-2 | 2-747708-0 | 207828-3 | 207828-4 | 5-338315-2 | 5207828-4 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | Amphenol ICC | NorComp Inc. | NorComp Inc. | NorComp Inc. | NorComp Inc. | TE Connectivity | TE Connectivity | TE Connectivity | TE Connectivity | TE Connectivity | TE Connectivity |
| Connector Type | Receptacle, Female | Receptacle, Female | Receptacle, Female | Receptacle, Female | Receptacle, Female | Receptacle, Female | Receptacle, Female | Receptacle, Female | Receptacle, Female | Receptacle, Female | Receptacle, Female |
| Number of Positions | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
| Shell Size Layout | 3 (DB, B) | 3 (DB, B) | 3 (DB, B) | 3 (DB, B) | 3 (DB, B) | 3 (DB, B) | 3 (DB, B) | 3 (DB, B) | 3 (DB, B) | 3 (DB, B) | 3 (DB, B) |
| Mounting Type | Panel Mount, Through Hole | Panel Mount, Through Hole | Panel Mount, Through Hole | Panel Mount, Through Hole | Panel Mount, Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole |
| Termination | Solder | Solder | Solder | Solder | Solder | Solder | Solder | Solder | Solder | Solder | Solder |
| Shell Material, Finish | Steel, Tin Plated | Steel, Nickel Plated | Steel, Nickel Plated | Steel, Nickel Plated | Steel, Nickel Plated | Steel, Tin Plated | Steel, Tin Plated | Not Specified | Not Specified | Steel, Tin Plated | Not Specified |
| Contact Finish | Gold | Gold | Gold | Gold | Gold | Gold | Gold | Gold | Gold | Gold | Gold |
| Contact Finish Thickness | 20.0µin (0.51µm) | Flash | Flash | Flash | Flash | Not Specified | 30.0µin (0.76µm) | Flash | 30.0µin (0.76µm) | Not Specified | 30.0µin (0.76µm) |
| Material Flammability Rating | UL94 V-0 | UL94 V-0 | UL94 V-0 | UL94 V-0 | UL94 V-0 | UL94 V-0 | UL94 V-0 | UL94 V-0 | UL94 V-0 | UL94 V-0 | UL94 V-0 |
| Current Rating (Amps) | 7.5A | 5A | 5A | 5A | 5A | 6A | 6A | 6A | 6A | 6A | 6A |
| Voltage Rating | 300V | Not Specified | Not Specified | Not Specified | Not Specified | Not Specified | 125V | 125V | 125V | Not Specified | 125V |
| Operating Temperature Range | -55°C ~ 125°C | -50°C ~ 100°C | -50°C ~ 100°C | -50°C ~ 100°C | -50°C ~ 100°C | -55°C ~ 105°C | -55°C ~ 105°C | -55°C ~ 105°C | -55°C ~ 105°C | -55°C ~ 105°C | -55°C ~ 105°C |
| Contact Material | Copper Alloy | Brass | Brass | Brass | Brass | Phosphor Bronze | Phosphor Bronze | Phosphor Bronze | Phosphor Bronze | Phosphor Bronze | Phosphor Bronze |
| Dielectric Material | Thermoplastic, Glass Filled | Polyamide (PA6T), Nylon 6T | Polyamide (PA6T), Nylon 6T | Polyamide (PA6T), Nylon 6T | Polyamide (PA6T), Nylon 6T | Polyester, Glass Filled | Thermoplastic | Polyester | Polyester | Polyester, Glass Filled | Polyester |
| RoHS Status | RoHS Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | RoHS Non-Compliant | RoHS Non-Compliant | RoHS Non-Compliant | ROHS3 Compliant | RoHS Compliant |
| Product Status | Active | Active | Active | Active | Active | Active | Active | Active | Active | Active | Active |
Engineering Selection Recommendations
Primary Substitutes (Recommended for Active Product Selection):
NorComp Inc. 172-E series connectors (172-E25-213R001, 172-E25-213R011, 172-E25-213R031, 172-E25-213R911) are ROHS3 Compliant and actively produced. These parts satisfy core mechanical and electrical compatibility requirements. The 172-E series operates within the acceptable temperature range of -50°C to 100°C and maintains UL94 V-0 flammability certification. Selection within this series depends on flange configuration requirements: housing/shell unthreaded (172-E25-213R001), board side 4-40 (172-E25-213R011), mating side 4-40 (172-E25-213R031), or combined board and mating side with screwlock (172-E25-213R911).
TE Connectivity AMPLIMITE HDP-20 series (2-338315-2, 5-338315-2) provides ROHS3 Compliant alternatives with ROHS3 and RoHS Compliant status respectively. Both parts feature 6A current rating and -55°C to 105°C operating range, closely matching the main part's thermal envelope.
Conditional Substitutes (Limited Application Scope):
TE Connectivity AMPLIMITE HD-20 series (2-747708-0, 207828-3, 207828-4, 5207828-4) are actively produced but carry RoHS non-compliant or vendor-undefined compliance status. These parts are suitable only for applications where RoHS compliance is not required. The 125V voltage rating is lower than the main part's 300V specification and should be evaluated against application requirements.
Frequently Asked Questions (FAQ)
Q: Can the NorComp 172-E25-213R011 directly replace the L77DFBH25SOL2RM5?
A: The 172-E25-213R011 is mechanically and electrically compatible for signal-level applications within the overlapping operating temperature range (-50°C to 100°C). Both connectors maintain the same 25-position D-Sub shell size layout, solder termination, and UL94 V-0 flammability rating. However, the NorComp part has a 5A current rating versus 7.5A for the Amphenol part. Applications requiring the full 7.5A current capacity must evaluate actual circuit requirements before substitution. Additionally, the 172-E25-213R011 features nickel-plated steel finish and polyamide dielectric material, which differ from the main part's tin-plated steel and glass-filled thermoplastic construction.
Q: What is the impact of different flange features among NorComp 172-E series parts?
A: Flange feature differences affect mechanical mounting only. The 172-E25-213R001 uses an unthreaded housing/shell flange, the 172-E25-213R011 employs a board-side 4-40 threaded flange, and the 172-E25-213R031 features a mating-side 4-40 threaded flange. The L77DFBH25SOL2RM5 specifies board-side 4-40 mounting, making the 172-E25-213R011 mechanically equivalent. The 172-E25-213R001 and 172-E25-213R031 require mechanical redesign of the mounting interface.
Q: Why do some substitute parts show lower voltage ratings than the main part?
A: Voltage rating differences reflect design specifications set by each manufacturer. The L77DFBH25SOL2RM5 is rated for 300V, while several TE Connectivity alternatives specify 125V or list voltage ratings as unspecified. Application circuits operating above 125V cannot use these lower-rated alternatives. Circuits operating well below the minimum substitute rating (125V) can proceed with substitution based on core electrical and mechanical compatibility.
Q: Are RoHS non-compliant parts usable as substitutes?
A: RoHS non-compliant parts (2-747708-0, 207828-3, 207828-4) function electrically and mechanically as substitutes but are restricted to applications where RoHS compliance is not contractually or regulatory required. Many commercial and industrial designs no longer allow non-compliant components. Verify compliance requirements before specifying these alternatives.
Q: What is the significance of contact material differences (copper alloy vs. brass vs. phosphor bronze)?
A: All three materials—copper alloy (main part), brass (NorComp series), and phosphor bronze (TE Connectivity series)—provide adequate electrical conductivity for signal-level D-Sub applications. Contact resistance and durability characteristics vary slightly among materials, but for standard interconnect applications, functional differences are negligible. Contact finish (gold plating) on all parts ensures reliable low-resistance connections.
Q: How do operating temperature ranges affect substitution decisions?
A: The L77DFBH25SOL2RM5 operates from -55°C to 125°C. NorComp 172-E series parts operate from -50°C to 100°C, representing a narrower range. Designs operating near the extremes of the main part's range may exceed substitute capabilities. TE Connectivity AMPLIMITE series (-55°C to 105°C) provides closer thermal matching, though still limited at the upper extreme.
Q: What packaging differences exist among these substitutes?
A: The L77DFBH25SOL2RM5 is supplied in trays. NorComp 172-E series parts are supplied in trays. TE Connectivity parts vary: 2-338315-2 and 5-338315-2 in bulk, while 2-747708-0, 207828-3, 207828-4, and 5207828-4 in tubes. Packaging differences affect handling, storage, and lead-time management but do not affect connector functional compatibility. Verify packaging requirements for your supply chain processes.
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