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L777DFBF25PT D-Sub Connector Equivalent & Substitute Parts
Part Overview
The L777DFBF25PT is a 25 Position D-Sub Plug connector manufactured by Amphenol ICC (Commercial Products). This connector features male pins with panel mount through-hole termination via solder. The product is currently active and widely used in industrial and commercial applications requiring signal distribution through standardized D-Sub shell size 3 (DB, B) configurations.
Substitutes become necessary when the primary part is unavailable, requires alternative mounting specifications, different compliance certifications, or when supply chain constraints require equivalent alternatives that meet the same electrical and mechanical requirements.
Substiute Parts
Key Parameters
| Parameter | L777DFBF25PT |
|---|---|
| Connector Type | Plug, Male Pins |
| Number of Positions | 25 |
| Shell Size, Connector Layout | 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 | Steel, Tin Plated |
| Contact Material | Brass |
| Contact Finish | Gold (30.0µin / 0.76µm) |
| RoHS Status | RoHS non-compliant |
| Flange Feature | Housing/Shell (Unthreaded) |
Substitute Part Grouping Explanation
Substitution compatibility is determined by matching the following critical parameters:
- Connector Type: Plug with Male Pins (required match)
- Number of Positions: 25 positions (required match)
- Shell Size, Connector Layout: 3 (DB, B) (required match)
- Termination: Solder (required match)
- Current Rating: Minimum 7.5A for drop-in replacement; lower ratings acceptable if circuit design permits
- Voltage Rating: Minimum 300V for equivalent operation; lower ratings indicate restricted application scope
- Operating Temperature Range: Must encompass or exceed -55°C to 155°C for full compatibility
- Mounting Type: Panel Mount configurations allow substitution with Through Hole alternatives if mechanical integration is feasible
Substitute parts listed below meet the core connector type, position count, shell size, and termination requirements. Variations in current rating, voltage rating, temperature range, shell finish, contact material, and compliance certifications are noted to enable informed selection based on application-specific requirements.
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Connector Type | Positions | Mounting Type | Current Rating (A) | Voltage Rating (V) | Operating Temp (°C) | Shell Material, Finish | Contact Material | Contact Finish | RoHS Status | Product Status |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| L777DFBF25PT | Amphenol ICC | Plug, Male Pins | 25 | Panel Mount, Through Hole | 7.5 | 300 | -55 to 155 | Steel, Tin Plated | Brass | Gold | Non-compliant | Active |
| 09653617713 | HARTING | Plug, Male Pins | 25 | Through Hole | 6.5 | — | -55 to 125 | Steel | Copper Alloy | — | ROHS3 Compliant | Active |
| 1-5745968-3 | TE Connectivity AMP | Plug, Male Pins | 25 | Through Hole | 6 | 125 | -55 to 105 | Steel, Tin Plated | Brass | Gold | ROHS3 Compliant | Active |
| 1-5745968-4 | TE Connectivity AMP | Plug, Male Pins | 25 | Through Hole | 6 | 125 | -55 to 105 | Steel, Tin Plated | Brass | Gold | ROHS3 Compliant | Active |
| 1-5745968-5 | TE Connectivity AMP | Plug, Male Pins | 25 | Through Hole | 6 | 125 | -55 to 105 | Steel, Tin Plated | Brass | Gold | ROHS3 Compliant | Active |
| 1-5745968-6 | TE Connectivity AMP | Plug, Male Pins | 25 | Through Hole | 6 | 125 | -55 to 105 | Steel, Tin Plated | Brass | Gold | RoHS Compliant | Active |
| 172-025-112R001 | NorComp Inc. | Plug, Male Pins | 25 | Panel Mount, Through Hole | 5 | — | -50 to 100 | Steel, Tin Plated | Brass | Gold | ROHS3 Compliant | Obsolete |
| 172-E25-113R911 | NorComp Inc. | Plug, Male Pins | 25 | Panel Mount, Through Hole | 5 | — | -50 to 100 | Steel, Nickel Plated | Brass | Gold | ROHS3 Compliant | Active |
| 2-338311-2 | TE Connectivity AMP | Plug, Male Pins | 25 | Through Hole | 6 | 125 | -55 to 105 | Steel, Tin Plated | Phosphor Bronze | Gold | ROHS3 Compliant | Active |
| 2-5747704-0 | TE Connectivity AMP | Plug, Male Pins | 25 | Through Hole | 6 | 125 | -55 to 105 | Steel, Tin Plated | Brass | Gold | ROHS3 Compliant | Active |
| 5208008-1 | TE Connectivity AMP | Plug, Male Pins | 25 | Through Hole | 6 | 125 | -55 to 105 | — | Brass | Gold | ROHS3 Compliant | Active |
Engineering Selection Recommendations
Primary Equivalent (Active Products with Closest Parameter Match)
The TE Connectivity AMP AMPLIMITE HD-20 series (1-5745968-3, 1-5745968-4, 1-5745968-5, 1-5745968-6) and related models (2-5747704-0, 5208008-1) provide the closest functional equivalence to the L777DFBF25PT. These connectors share identical connector type, position count, shell size, and solder termination. All four variants are active products with ROHS3 compliance certification.
The trade-off involves reduced current rating (6A versus 7.5A) and voltage rating (125V versus 300V). The operating temperature range of -55°C to 105°C is narrower than the L777DFBF25PT specification of -55°C to 155°C. Selection among these four variants depends on mounting configuration requirements and compliance environment.
Mounting-Compatible Panel Mount Alternatives
The NorComp Inc. 172-E25-113R911 (Active) and 172-025-112R001 (Obsolete) retain panel mount through-hole mounting identical to the L777DFBF25PT. The 172-E25-113R911 is the recommended active-status alternative when panel mounting is a critical design requirement. This part exhibits reduced current rating (5A) and no specified voltage rating, with operating temperature range limited to -50°C to 100°C.
Compliance-Driven Substitutions
If RoHS3 compliance is mandated by the application environment, the L777DFBF25PT (RoHS non-compliant) must be replaced. The HARTING 09653617713 is ROHS3 compliant but lacks specified voltage rating and contact finish information. All TE Connectivity variants listed provide ROHS3 compliance where application requirements prohibit non-compliant components.
Current and Voltage Rating Limitations
Applications requiring the full 7.5A current capacity or 300V voltage rating cannot substitute parts rated below these specifications without circuit design modification. Such substitutions demand explicit electrical analysis to confirm safe operation under the application's maximum design parameters.
Frequently Asked Questions (FAQ)
Q: Can I use a TE Connectivity AMPLIMITE HD-20 series connector as a direct replacement for the L777DFBF25PT?
A: The TE Connectivity series (1-5745968-3, 1-5745968-4, 1-5745968-5, 1-5745968-6, 2-5747704-0, and 5208008-1) are mechanically compatible. However, verify that your circuit design accommodates the reduced current rating (6A versus 7.5A) and voltage rating (125V versus 300V). These are active products with ROHS3 compliance and identical connector type, position count, shell size, and solder termination.
Q: The L777DFBF25PT is RoHS non-compliant. What are my RoHS3-compliant alternatives?
A: All listed TE Connectivity variants except 5208008-1 (vendor undefined) carry ROHS3 Compliant or RoHS Compliant certification. The HARTING 09653617713 and NorComp Inc. 172-E25-113R911 also provide ROHS3 compliance. Verify compliance documentation with the supplier for applications requiring documented RoHS3 status.
Q: Can I substitute the NorComp 172-E25-113R911 for the L777DFBF25PT?
A: The NorComp part maintains panel mount through-hole mounting identical to the L777DFBF25PT and shares the same connector type, position count, and shell size. The current rating is reduced to 5A, voltage rating is unspecified, and operating temperature is limited to -50°C to 100°C. Substitution is permissible if your circuit design operates within these reduced specifications.
Q: What is the primary difference between the four TE Connectivity 1-5745968 variants?
A: The variants (1-5745968-3, 1-5745968-4, 1-5745968-5, 1-5745968-6) have identical electrical and mechanical specifications. Differences lie in packaging (all Tube), inventory availability, and RoHS certification status. Select based on supply availability and compliance documentation requirements.
Q: Is the L777DFBF25PT panel mount mounting type critical to my design?
A: If panel mount configuration is required, the NorComp Inc. 172-E25-113R911 or 172-025-112R001 are compatible alternatives. Most TE Connectivity and HARTING substitutes feature through-hole mounting without panel flanges, requiring mechanical redesign to integrate into panel mount configurations. Verify mechanical integration feasibility before substitution.
Q: What connector style parameters remain constant across all substitutes?
A: All substitute parts maintain the same connector style (D-Sub), connector type (Plug, Male Pins), number of positions (25), shell size and layout (3 DB, B), and solder termination. These parameters define the mechanical and electrical compatibility class.
Q: Why do some substitutes lack specified voltage ratings?
A: Voltage rating specifications are determined by connector design and materials. The absence of a specified rating indicates either unspecified design margins or voltage-independent operation for signal-only applications. Clarify voltage requirements with the component manufacturer before substitution in high-voltage environments.
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