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L777DFB25POL2 D-Sub 25 Position Plug Connector Equivalent & Substitute Parts
Part Overview
The L777DFB25POL2 is a 25 position D-Sub plug connector manufactured by Amphenol ICC (Commercial Products) in the DF series. This panel mount, through-hole solder connector features male pins with a DB/B shell size (Size 3) and is designed for signal applications. The part is currently active in production with 864 units in stock.
Equivalent and substitute parts are necessary when the primary part becomes unavailable, when alternative sourcing is required for supply chain optimization, or when design flexibility permits the use of functionally compatible alternatives that meet the same electrical and mechanical specifications.
Substiute Parts
Key Parameters
| Parameter | L777DFB25POL2 Specification |
|---|---|
| Connector Type | Plug, Male Pins |
| Number of Positions | 25 |
| Number of Rows | 2 |
| 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 125°C |
| Material Flammability Rating | UL94 V-0 |
| RoHS Status | RoHS Compliant |
| Contact Finish | Gold (30.0µin / 0.76µm) |
| Shell Material, Finish | Steel, Tin Plated |
Substitute Part Grouping Explanation
Substitution of D-Sub 25 position plug connectors is determined by strict alignment of the following critical parameters:
Mandatory Matching Parameters:
- Connector type: Plug with male pins
- Number of positions: 25
- Number of rows: 2
- Shell size and layout: 3 (DB, B)
- Termination method: Solder
- Material flammability rating: UL94 V-0
Electrical Compatibility Parameters:
- Current rating must equal or exceed 7.5A
- Voltage rating must equal or exceed 300V
- Operating temperature range must encompass -55°C to 125°C
Mechanical Compatibility Parameters:
- Mounting type must support panel mount, through-hole installation
- Contact finish and shell material must be compatible with the application environment
Substitute parts are grouped into two categories:
Category A - Panel Mount Equivalents: Parts with panel mount, through-hole mounting that directly replace the L777DFB25POL2 in identical mechanical configurations.
Category B - Through-Hole Alternatives: Parts with through-hole mounting that provide electrical and functional equivalence but may differ in mounting flange configuration or features.
Parameter Comparison
| Parameter | L777DFB25POL2 (Amphenol ICC) | 172-025-112R001 (NorComp) | 172-E25-113R911 (NorComp) | 1-5745968-3 (TE Connectivity) | 1-5745968-4 (TE Connectivity) | 1-5745968-5 (TE Connectivity) | 1-5745968-6 (TE Connectivity) | 2-5747704-0 (TE Connectivity) | 208008-2 (TE Connectivity) | 09653617713 (HARTING) | 2-338311-2 (TE Connectivity) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Connector Type | Plug, Male Pins | Plug, Male Pins | Plug, Male Pins | Plug, Male Pins | Plug, Male Pins | Plug, Male Pins | Plug, Male Pins | Plug, Male Pins | Plug, Male Pins | Plug, Male Pins | Plug, Male Pins |
| Number of Positions | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
| Number of Rows | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Shell Size, Connector 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 | Through Hole | 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 | 6A | 6A | 6A | 6A | 6A | 6A | 6.5A | 6A |
| Voltage Rating | 300V | Not Specified | Not Specified | 125V | 125V | 125V | 125V | 125V | 125V | Not Specified | 125V |
| Operating Temperature Range | -55°C to 125°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 | -55°C to 125°C | -55°C to 105°C |
| 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 |
| Contact Finish | Gold | Gold | Gold | Gold | Gold | Gold | Gold | Gold | Gold | Not Specified | Gold |
| Shell Material, Finish | Steel, Tin Plated | Steel, Tin Plated | Steel, Nickel Plated | Steel, Tin Plated | Steel, Tin Plated | Steel, Tin Plated | Steel, Tin Plated | Steel, Tin Plated | Not Specified | Steel | Steel, Tin Plated |
| Product Status | Active | Obsolete | Active | Active | Active | Active | Active | Active | Active | Active | Active |
| RoHS Status | RoHS Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | RoHS Compliant | ROHS3 Compliant | Not Applicable | ROHS3 Compliant | ROHS3 Compliant |
Engineering Selection Recommendations
Direct Panel Mount Equivalents (Category A):
The NorComp 172-025-112R001 and 172-E25-113R911 are panel mount, through-hole D-Sub 25 position plug connectors with identical mechanical mounting configurations to the L777DFB25POL2. Both parts are UL94 V-0 rated and feature gold-plated contacts. The 172-025-112R001 is obsolete but remains available in inventory. The 172-E25-113R911 is active and ROHS3 compliant. Both parts have lower current ratings (5A) and reduced operating temperature ranges (-50°C to 100°C) compared to the primary part, making them suitable only for applications within these reduced specifications.
Through-Hole Alternatives (Category B):
TE Connectivity AMPLIMITE HD-20 series parts (1-5745968-3, 1-5745968-4, 1-5745968-5, 1-5745968-6, 2-5747704-0, and 208008-2) are through-hole solder D-Sub 25 position plug connectors with 6A current ratings and 125V voltage ratings. These parts are active, ROHS3 compliant, and feature gold-plated brass contacts on tin-plated steel shells. Operating temperature range is -55°C to 105°C. These parts differ from the primary part in mounting configuration (through-hole without panel mount flange) and reduced voltage rating (125V versus 300V). The 2-5747704-0 includes board lock features and grounding indents. The 208008-2 features an unthreaded housing shell.
HARTING 09653617713:
The HARTING 09653617713 is a through-hole D-Sub 25 position plug connector with 6.5A current rating and operating temperature range of -55°C to 125°C, matching the primary part's temperature specification. This part features board lock and grounding indents, with a steel shell (finish not specified). Contact finish is not specified. This part is active and ROHS3 compliant.
TE Connectivity 2-338311-2:
The 2-338311-2 is an AMPLIMITE HDP-20 series through-hole D-Sub 25 position plug connector with board-side M3 mounting and board lock features. It features 6A current rating, 125V voltage rating, and phosphor bronze contacts on tin-plated steel. Operating temperature range is -55°C to 105°C. This part is active and ROHS3 compliant but has REACH Affected status.
Compliance Considerations:
All substitute parts maintain UL94 V-0 flammability ratings. Most substitute parts are ROHS3 compliant. The primary part (L777DFB25POL2) is RoHS Compliant. The 208008-2 has RoHS status listed as Not Applicable. The 2-338311-2 and 2-5747704-0 have REACH Affected status, while the primary part has REACH Unaffected status.
Frequently Asked Questions (FAQ)
Q: Can the NorComp 172-025-112R001 directly replace the L777DFB25POL2?
A: The 172-025-112R001 shares identical mechanical mounting (panel mount, through-hole) and connector configuration (25 position, 2 row, DB/B shell size). However, it has a lower current rating (5A versus 7.5A) and reduced operating temperature range (-50°C to 100°C versus -55°C to 125°C). It is also obsolete. Direct replacement is only suitable for applications operating within the reduced electrical and thermal specifications.
Q: What is the primary difference between Category A and Category B substitute parts?
A: Category A parts (NorComp 172 series) feature panel mount, through-hole mounting identical to the L777DFB25POL2. Category B parts (TE Connectivity AMPLIMITE series and HARTING) feature through-hole mounting without panel mount flanges. Category B parts require different mechanical integration into the application.
Q: Why do most substitute parts have lower voltage ratings (125V) compared to the primary part (300V)?
A: The voltage rating is determined by the dielectric material and contact spacing design. The L777DFB25POL2 is rated for 300V, while most substitute parts are rated for 125V. Applications requiring 300V operation cannot use these lower-rated substitutes.
Q: Are all substitute parts RoHS compliant?
A: Most substitute parts are ROHS3 compliant. The primary part is RoHS Compliant. The 208008-2 has RoHS status listed as Not Applicable. Compliance status should be verified against specific application requirements.
Q: Can the TE Connectivity AMPLIMITE HD-20 series parts be used in panel mount applications?
A: The AMPLIMITE HD-20 series parts feature through-hole mounting without panel mount flanges. They can be used in through-hole PCB applications but require different mechanical integration compared to panel mount designs. The 2-5747704-0 includes a housing shell with 4-40 mounting, and the 2-338311-2 includes board-side M3 mounting for board lock applications.
Q: What is the inventory status of substitute parts?
A: The L777DFB25POL2 has 864 units in stock. Substitute parts have varying inventory levels: 172-025-112R001 (2,444 units), 172-E25-113R911 (986 units), 1-5745968-3 (1,442 units), 1-5745968-4 (3,136 units), 1-5745968-5 (1,823 units), 1-5745968-6 (1,532 units), 2-5747704-0 (3,224 units), 208008-2 (942 units), 09653617713 (884 units), and 2-338311-2 (779 units).
Q: Which substitute part has the closest electrical specifications to the L777DFB25POL2?
A: The HARTING 09653617713 matches the primary part's operating temperature range (-55°C to 125°C) and has the highest current rating among substitutes (6.5A). However, it does not match the 300V voltage rating and lacks specified contact finish details.
Q: Are there any REACH compliance concerns with substitute parts?
A: The primary part (L777DFB25POL2) has REACH Unaffected status. The 2-338311-2 and 2-5747704-0 have REACH Affected status. The 208008-2 also has REACH Affected status. Applications subject to REACH regulations should verify compliance requirements.
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