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L77DFBF25SOL2 - Equivalent and Substitute Parts
Part Overview
The L77DFBF25SOL2 is a 25-position D-Sub receptacle connector manufactured by Amphenol ICC, featuring female sockets with panel mount, through-hole solder termination. This active-status connector provides solder contact interface for D-Sub applications requiring 25-position configurations.
Finding equivalent substitute parts is necessary when the primary part becomes unavailable, when alternative mounting or flange configurations are required for specific installation geometries, or when different compliance certifications or temperature ratings are mandated by application requirements.
Substiute Parts
Key Parameters
| Parameter | L77DFBF25SOL2 Value |
|---|---|
| Connector Type | D-Sub Receptacle, Female Sockets |
| Number of Positions | 25 |
| Shell Size | Size 3 (DB, B) |
| Mounting Type | Panel Mount, Through Hole |
| Termination | Solder |
| Current Rating | 7.5A |
| Voltage Rating | 300V |
| Operating Temperature Range | -55°C to 155°C |
| Shell Material/Finish | Steel, Tin Plated |
| Contact Finish | Gold, 20.0µin (0.51µm) |
| Flange Feature | Housing/Shell (Unthreaded) |
| RoHS Status | RoHS Compliant |
Substitute Part Grouping Explanation
Substitute relationships are established based on core electrical and mechanical compatibility with the L77DFBF25SOL2. The following parameters define substitutability:
Critical compatibility parameters:
- Connector type must be D-Sub receptacle with female sockets
- 25-position configuration in Size 3 (DB, B) shell layout
- Through-hole solder termination
- UL94 V-0 flammability rating
- Panel mount installation capability
Parameters with operational flexibility:
- Current rating: Substitute parts with 5A or 6A ratings can be used where the L77DFBF25SOL2's 7.5A capability is not required
- Operating temperature range: Substitutes with -50°C to 100°C or -55°C to 105°C ratings are acceptable when application temperatures fall within the substitute's range
- Voltage rating: Substitutes without specified voltage rating or with lower ratings can be selected when voltage does not exceed the L77DFBF25SOL2's 300V limit
- Shell material finish: Steel, tin-plated or nickel-plated finishes are substitutable; variations in contact finish thickness and material (copper alloy versus brass) do not prevent substitution
- Flange feature variations: Housing/shell unthreaded, board-side, or mating-side threaded options provide mounting flexibility
Non-compatibility parameters:
- Any connector configuration other than 25-position D-Sub receptacle
- Different termination types (non-solder connections)
- Through-hole mounting requirement precludes surface-mount alternatives
Parameter Comparison
| Parameter | L77DFBF25SOL2 (Amphenol) | 172-E25-213R001 (NorComp) | 172-E25-213R011 (NorComp) | 172-E25-213R031 (NorComp) | 172-E25-213R911 (NorComp) | 2-338315-2 (TE) | 2-747708-0 (TE) | 207828-3 (TE) | 207828-4 (TE) | 5-338315-2 (TE) | 5207828-4 (TE) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | Size 3 (DB, B) | Size 3 (DB, B) | Size 3 (DB, B) | Size 3 (DB, B) | Size 3 (DB, B) | Size 3 (DB, B) | Size 3 (DB, B) | Size 3 (DB, B) | Size 3 (DB, B) | Size 3 (DB, B) | Size 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 |
| 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 to 155°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 |
| Shell Material/Finish | Steel, Tin Plated | Steel, Nickel Plated | Steel, Nickel Plated | Steel, Nickel Plated | Steel, Nickel Plated | Steel, Tin Plated | Not specified | Not specified | Not specified | Steel, Tin Plated | Not specified |
| Contact Finish | Gold | Gold | Gold | Gold | Gold | Gold | Gold | Gold | Gold | Gold | Gold |
| Flange Feature | Housing/Shell (Unthreaded) | Housing/Shell (Unthreaded) | Board Side (4-40) | Mating Side (4-40) | Board Side (4-40); Mating Side Female Screwlock (4-40) | Housing/Shell (M3) | Housing/Shell (4-40) | Housing/Shell (Unthreaded) | Housing/Shell (Unthreaded) | Housing/Shell (Unthreaded) | Housing/Shell (Unthreaded) |
| 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 |
| 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 |
Engineering Selection Recommendations
NorComp 172-E Series (172-E25-213R001, 172-E25-213R011, 172-E25-213R031, 172-E25-213R911): All NorComp variants are active-status, ROHS3-compliant products with identical electrical and mechanical specifications within the series. These connectors are suitable for applications where current requirements do not exceed 5A and operating temperatures remain within -50°C to 100°C. The 172-E25-213R001 offers unthreaded housing matching the L77DFBF25SOL2 mounting configuration. Variants 172-E25-213R011, 172-E25-213R031, and 172-E25-213R911 provide board-side or mating-side threaded flange options for applications requiring mechanical locking or specific mounting geometries. NorComp parts feature nickel-plated steel shells and are suitable for general industrial applications where ROHS3 compliance is mandatory.
TE Connectivity AMPLIMITE HDP-20 Series (2-338315-2, 5-338315-2): Both TE AMPLIMITE HDP-20 variants provide 6A current rating with operating range -55°C to 105°C, accommodating broader temperature specifications than NorComp alternatives. Part 2-338315-2 carries ROHS3 compliance; part 5-338315-2 carries ROHS3 compliance with REACH affected status. The unthreaded housing configuration of 5-338315-2 most closely matches the L77DFBF25SOL2 installation profile. Both parts feature tin-plated steel shells and board lock features suitable for high-reliability through-hole board mount applications.
TE Connectivity AMPLIMITE HD-20 Series (2-747708-0, 207828-3, 207828-4, 5207828-4): This TE AMPLIMITE HD-20 series provides 6A current rating with 125V specified voltage rating and -55°C to 105°C operating range. Parts 207828-3 and 207828-4 carry RoHS non-compliant status; part 5207828-4 carries RoHS compliant status. The unthreaded housing variants (207828-3, 207828-4, 5207828-4) match the L77DFBF25SOL2 mounting configuration. TE AMPLIMITE HD-20 connectors are established in applications requiring proven long-term reliability. Contact with material variations (phosphor bronze versus copper alloy) and contact finish thickness variations (30.0µin versus flash) provide secondary performance optimization options.
Application-Specific Guidance:
- For high-current applications exceeding 5A, TE AMPLIMITE series (6A rating) provides improved margin over NorComp 172-E series (5A rating).
- For applications requiring RoHS compliance, all substitute options satisfy RoHS3 requirements. AMPLIMITE HDP-20 and HD-20 variants offer compliance assurance.
- For extended temperature applications requiring operation above 105°C, the L77DFBF25SOL2 original specification (-55°C to 155°C) exceeds substitute capabilities.
- For unthreaded panel mounting without mechanical locking requirements, NorComp 172-E25-213R001, TE 5-338315-2, and TE HD-20 unthreaded variants are directly substitutable.
Frequently Asked Questions (FAQ)
Q: Are all substitute parts physically interchangeable with L77DFBF25SOL2? A: All substitute parts listed are 25-position D-Sub Size 3 receptacles with solder termination and through-hole installation. Mechanical fit for panel mounting depends on flange configuration. Unthreaded housing variants (NorComp 172-E25-213R001, TE 5-338315-2, and TE HD-20 unthreaded models) provide direct substitution for L77DFBF25SOL2 panel mount applications. Threaded or featured variants (NorComp 172-E25-213R011, 172-E25-213R031, 172-E25-213R911; TE 2-338315-2, 2-747708-0) require mechanical compatibility evaluation for specific installation geometries.
Q: What is the significance of current rating differences between parts? A: The L77DFBF25SOL2 specifies 7.5A maximum current per contact. Substitute parts with lower current ratings (5A for NorComp, 6A for TE) are acceptable only when actual signal current per contact does not exceed the substitute's rating. Applications requiring 7.5A contacts must use the L77DFBF25SOL2 original specification or verify that load requirements remain within substitute tolerances.
Q: Do temperature rating differences affect substitutability? A: The L77DFBF25SOL2 operating range is -55°C to 155°C. NorComp 172-E series operates -50°C to 100°C; TE AMPLIMITE series operate -55°C to 105°C. Substitution is valid when actual application temperatures remain within the substitute part's temperature range. Applications requiring operation above 105°C cannot use any substitute listed and must retain the original L77DFBF25SOL2 specification.
Q: How do shell material finish variations affect performance? A: Steel tin-plated shells (L77DFBF25SOL2, TE AMPLIMITE) and steel nickel-plated shells (NorComp 172-E) provide equivalent corrosion resistance for standard industrial environments. Material selection depends on specific application environmental exposure and long-term reliability requirements. Both finishes satisfy UL94 V-0 flammability requirements.
Q: What is the impact of contact material differences (copper alloy versus brass)? A: The L77DFBF25SOL2 uses copper alloy contacts; substitute parts use brass contacts in NorComp variants or phosphor bronze in TE variants. These materials provide equivalent electrical performance for signal-level applications. Contact finish (gold plating) is consistent across all parts, ensuring equivalent mating surface characteristics for low-resistance connections.
Q: Are RoHS compliance variations significant for component selection? A: The L77DFBF25SOL2 is RoHS compliant. All substitute parts meet RoHS3 requirements except TE AMPLIMITE HD-20 variants (207828-3, 207828-4), which carry RoHS non-compliant status. Selection should reflect customer or regulatory RoHS compliance mandates. ROHS3-compliant substitutes (NorComp 172-E series, TE AMPLIMITE HDP-20) are preferred for applications with RoHS documentation requirements.
Q: Why do some substitute parts have undefined or lower voltage ratings? A: The L77DFBF25SOL2 specifies 300V. NorComp 172-E series parts do not specify voltage rating; TE AMPLIMITE HD-20 series specify 125V. Unspecified voltage ratings indicate the manufacturer does not certify a voltage rating limit, not that the parts lack voltage capability. The 300V specification of the L77DFBF25SOL2 is a design margin specification; actual application voltage requirements determine selection. Substitution is acceptable when application voltage does not exceed 125V (TE HD-20) or when the application voltage requirement is lower than the specification.
Q: What is the difference between flange configurations, and does it affect functionality? A: Flange variations (unthreaded housing, board-side threaded, mating-side threaded, or combined locking features) affect mechanical mounting interface only. Electrical and signal integrity performance is independent of flange configuration. Selection of flange type depends on installation geometry, mechanical support requirements, and mating connector locking preferences. Unthreaded housing provides simple push-fit installation; threaded variants provide mechanical locking for applications requiring vibration resistance or secure mechanical retention.
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