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L77DFBG25SOL2RM5
Part Overview
The L77DFBG25SOL2RM5 is a 25-position D-Sub receptacle connector manufactured by Amphenol ICC (Commercial Products) in the DF series. This panel-mount, solder-terminated connector features female sockets with a board-side M3 flange, tin-plated steel shell, and gold-plated machined contacts. The connector is active in production and RoHS compliant, with 905 units currently in stock. Substitute parts are necessary to provide design flexibility, accommodate supply chain variations, and address specific application requirements such as different flange configurations, temperature ranges, or current ratings.
Substiute Parts
Key Parameters
| Parameter | Specification |
|---|---|
| Manufacturer Part Number | L77DFBG25SOL2RM5 |
| Connector Type | D-Sub Receptacle, Female Sockets |
| Number of Positions | 25 |
| Shell Size / Layout | 3 (DB, B) / 2 Rows |
| Mounting Type | Panel Mount, Through Hole |
| Flange Feature | Board Side (M3) |
| Termination | Solder |
| Shell Material / Finish | Steel, Tin Plated |
| Contact Material / Finish | Copper Alloy / Gold (20.0µin) |
| Current Rating | 7.5A |
| Voltage Rating | 300V |
| Operating Temperature | -55°C to 125°C |
| Flammability Rating | UL94 V-0 |
| RoHS Status | RoHS Compliant |
| MSL Rating | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution for the L77DFBG25SOL2RM5 is determined by the following critical electrical and mechanical parameters:
Core Compatibility Requirements:
- Connector Type: D-Sub Receptacle, Female Sockets (25-position, 2-row configuration)
- Shell Size: 3 (DB, B) layout
- Termination Method: Solder
- Contact Type: Signal, machined contacts
- Mounting: Panel Mount, Through Hole
Allowed Parameter Variations for Substitution:
- Flange Feature: Different flange mounting configurations (Board Side M3, Board Side 4-40, Mating Side 4-40, Housing/Shell unthreaded, or combinations) are acceptable provided through-hole mounting is maintained
- Shell Material Finish: Tin-plated or nickel-plated steel finishes are interchangeable
- Contact Material: Copper Alloy, Brass, or Phosphor Bronze are acceptable alternatives with compatible contact geometry
- Contact Finish Thickness: Gold flash or thicker gold plating (20.0µin or 30.0µin) are functionally equivalent
- Current Rating: Substitute parts with equal or higher current capacity (≥7.5A) are acceptable
- Voltage Rating: Substitutes rated at 300V or higher are acceptable
- Operating Temperature Range: Substitutes with overlapping or extended temperature ranges within -55°C to 125°C are acceptable
- RoHS/Compliance Status: ROHS3 Compliant and RoHS Compliant parts are functionally equivalent; REACH status variations do not affect electrical substitution
Non-Substitutable Parameters:
- Number of Positions and Row Configuration (must remain 25-position, 2-row)
- Connector Style and Type (must remain D-Sub Receptacle)
- Solder Termination (termination method cannot be changed)
Parameter Comparison
| Parameter | L77DFBG25SOL2RM5 | 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 Sockets | Receptacle, Female Sockets | Receptacle, Female Sockets | Receptacle, Female Sockets | Receptacle, Female Sockets | Receptacle, Female Sockets | Receptacle, Female Sockets | Receptacle, Female Sockets | Receptacle, Female Sockets | Receptacle, Female Sockets | Receptacle, Female Sockets |
| 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) |
| Flange Feature | Board Side (M3) | Housing/Shell (Unthreaded) | Board Side (4-40) | Mating Side (4-40) | Board Side (4-40) / Mating Side (4-40) | Housing/Shell (M3) | Housing/Shell (4-40) | Housing/Shell (Unthreaded) | Housing/Shell (Unthreaded) | Housing/Shell (Unthreaded) | Housing/Shell (Unthreaded) |
| 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 Material / Finish | Copper Alloy / Gold | Brass / Gold | Brass / Gold | Brass / Gold | Brass / Gold | Phosphor Bronze / Gold | Phosphor Bronze / Gold | Phosphor Bronze / Gold | Phosphor Bronze / Gold | Phosphor Bronze / Gold | Phosphor Bronze / 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) |
| 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 | -55°C to 125°C | -50°C to 100°C | -50°C to 100°C | -50°C to 100°C | -50°C to 100°C | -55°C to 105°C | -55°C to 105°C | -55°C to 105°C | -55°C to 105°C | -55°C to 105°C | -55°C to 105°C |
| 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 |
| Product Status | Active | Active | Active | Active | Active | Active | Active | Active | Active | Active | Active |
| 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 |
| Packaging | Tray | Tray | Tray | Tray | Tray | Bulk | Tube | Tube | Tube | Bulk | Tube |
| Inventory Status | 905 Pcs | 1741 Pcs | 1042 Pcs | 1317 Pcs | 3289 Pcs | 1204 Pcs | 2038 Pcs | 1434 Pcs | 861 Pcs | 769 Pcs | 1390 Pcs |
Engineering Selection Recommendations
Primary Substitutes (Active Status, RoHS Compliant):
NorComp 172-E25 series connectors (172-E25-213R001, 172-E25-213R011, 172-E25-213R031, 172-E25-213R911) are suitable substitutes for applications requiring compliance with ROHS3 standards. All variants maintain the 25-position, 2-row D-Sub configuration with solder termination and UL94 V-0 flammability rating. However, these parts are rated at 5A maximum current, which is below the 7.5A rating of the primary part. Operating temperature range is limited to -50°C to 100°C, restricting use in applications requiring the full -55°C to 125°C range. Flange configurations differ from the original M3 board-side mounting but provide alternative mechanical mounting options including 4-40 thread variants.
TE Connectivity AMPLIMITE HDP-20 series (2-338315-2 and 5-338315-2) provide higher current capacity at 6A with RoHS compliance. The 2-338315-2 variant includes board-lock features identical to the primary part. Both feature phosphor bronze contacts and tin-plated steel shells with operating temperature range of -55°C to 105°C, which overlaps the primary specification. Housing/shell flange configurations require different mechanical mounting arrangements compared to the board-side M3 original.
TE Connectivity AMPLIMITE HD-20 series (2-747708-0, 207828-3, 207828-4, 5207828-4) offers extended operating temperature matching the primary part at -55°C to 105°C. These parts are limited to 125V voltage rating compared to the 300V rating of the L77DFBG25SOL2RM5 and carry RoHS non-compliance or undefined vendor compliance status. Current capacity is 6A with gold-plated phosphor bronze contacts.
Recommended Selection Criteria:
For applications where current rating must not exceed 7.5A and voltage exceeds 125V, use the primary part (L77DFBG25SOL2RM5) or TE Connectivity parts with stated 300V capability where available. For lower-voltage applications (≤125V) with current requirements between 5A and 6A, NorComp or TE Connectivity AMPLIMITE alternatives are acceptable substitutes. For temperature-constrained applications requiring operation below -50°C or above 100°C, verify the selected substitute's operating range. Flange configuration selection depends on panel mounting hole patterns and mechanical constraints of the target application.
Frequently Asked Questions (FAQ)
Q: Can I substitute NorComp 172-E25 connectors for the Amphenol L77DFBG25SOL2RM5?
A: NorComp 172-E25 series connectors are mechanically and electrically compatible substitutes for the same 25-position D-Sub receptacle configuration, solder termination, and signal contact type. However, the 5A current rating is lower than the 7.5A specification of the primary part. Operating temperature range is restricted to -50°C to 100°C, limiting use in applications requiring the full -55°C to 125°C range. Substitution is acceptable for applications operating within these reduced parameters.
Q: What is the difference between flange mounting options in the substitute parts?
A: The primary part (L77DFBG25SOL2RM5) features board-side M3 mounting, allowing M3 screws to secure the connector from the component side. NorComp variants provide alternative mounting: housing/shell unthreaded designs (172-E25-213R001) require no fastening, board-side 4-40 designs (172-E25-213R011, 172-E25-213R911) use 4-40 machine screws, and mating-side 4-40 designs (172-E25-213R031) mount from the connector mating interface. TE Connectivity parts use housing/shell configurations with M3 or 4-40 threading or unthreaded designs. Selection depends on available panel cutout dimensions and fastening hardware compatibility.
Q: Are all substitute parts RoHS compliant?
A: NorComp 172-E25 series and TE Connectivity 2-338315-2, 5-338315-2, and 5207828-4 are RoHS compliant (ROHS3 Compliant or RoHS Compliant status). TE Connectivity 2-747708-0, 207828-3, and 207828-4 are marked as RoHS non-compliant. Selection must align with end-product regulatory requirements and target markets.
Q: Can substitute parts handle the same current as the original L77DFBG25SOL2RM5?
A: NorComp 172-E25 connectors are rated at 5A maximum current, below the 7.5A rating of the primary part. TE Connectivity AMPLIMITE variants are rated at 6A, still below the primary specification. Substitution with reduced current rating is acceptable only for applications with actual current requirements at or below the substitute part's rating. Applications requiring 7.5A or higher current capacity require the original part or confirmation of compatibility with the substitute supplier.
Q: What are the temperature range limitations when using substitute parts?
A: NorComp 172-E25 series operates between -50°C and 100°C, which does not cover the -55°C to 125°C range of the primary part. TE Connectivity AMPLIMITE HDP-20 and HD-20 series operate between -55°C and 105°C, providing coverage of the lower temperature extreme but not the upper limit. Applications requiring operation at 125°C must use the primary part. Applications with temperature requirements between -50°C and 100°C are compatible with NorComp variants; applications between -55°C and 105°C are compatible with TE Connectivity variants.
Q: What packaging formats are available for substitute parts?
A: The primary part is supplied in tray packaging. NorComp substitutes are supplied in tray format matching the original. TE Connectivity AMPLIMITE HDP-20 variants (2-338315-2, 5-338315-2) are supplied in bulk packaging. TE Connectivity AMPLIMITE HD-20 variants (2-747708-0, 207828-3, 207828-4, 5207828-4) are supplied in tube packaging. Packaging format selection depends on inventory management, handling, and storage requirements of the application.
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