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L77DFB25POL2
Part Overview
The L77DFB25POL2 is a 25 Position D-Sub Plug connector manufactured by Amphenol ICC (Commercial Products) with male pins, panel mount configuration, and solder termination. This part is classified as Obsolete, necessitating identification of active substitute components that maintain equivalent electrical and mechanical performance across critical operating parameters. The connector is specified for applications requiring signal-level connectivity with 7.5A current capacity and 300V voltage rating across an operating temperature range of -55°C to 155°C.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Connector Type | D-Sub Plug, Male Pins |
| Number of Positions | 25 |
| Shell Size / Layout | 3 (DB, B) |
| Mounting Type | Panel Mount, Through Hole |
| Termination Method | Solder |
| Current Rating | 7.5A |
| Voltage Rating | 300V |
| Operating Temperature | -55°C to 155°C |
| Shell Material / Finish | Steel, Tin Plated |
| Contact Finish | Gold (20.0µin / 0.51µm) |
| Flange Feature | Housing/Shell (Unthreaded) |
| Material Flammability Rating | UL94 V-0 |
| RoHS Compliance | RoHS Compliant |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitution eligibility is determined by strict equivalence across electrical and mechanical parameters: connector type (D-Sub Plug, Male Pins, 25 positions), shell size layout (3 / DB, B), mounting configuration (Panel Mount, Through Hole), termination method (Solder), shell material finish (Steel, Tin Plated), flange feature (Housing/Shell Unthreaded), and material flammability (UL94 V-0). Current rating, voltage rating, operating temperature range, contact finish, and RoHS compliance status are secondary parameters that may differ within acceptable engineering margins but must be documented for design verification.
Primary category substitutes are identified based on exact alignment with connector type, positions, shell size, mounting type, termination, and flange feature. The L717DFB25POL2 (Amphenol ICC) and 172-025-112R001 (NorComp Inc.) are directly equivalent in these core parameters. Additional similar parts from HARTING and TE Connectivity meet the fundamental D-Sub 25-position, Shell Size 3, Panel Mount solder configuration but with variations in mounting method (Through Hole versus vertical orientation), flange features, or shell material finish that must be evaluated against application requirements.
Parameter Comparison
| Parameter | L77DFB25POL2 (Main) | L717DFB25POL2 | 09643227240 | 09653617713 | 1-5745968-3 | 1-5745968-4 | 1-5745968-5 | 1-5745968-6 | 1-745968-4 | 172-025-112R001 | 172-E25-113R911 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | Amphenol ICC | Amphenol ICC | HARTING | HARTING | TE Connectivity | TE Connectivity | TE Connectivity | TE Connectivity | TE Connectivity | NorComp Inc. | NorComp Inc. |
| Connector Type | D-Sub Plug, Male Pins | D-Sub Plug, Male Pins | D-Sub Plug, Male Pins | D-Sub Plug, Male Pins | D-Sub Plug, Male Pins | D-Sub Plug, Male Pins | D-Sub Plug, Male Pins | D-Sub Plug, Male Pins | D-Sub Plug, Male Pins | D-Sub Plug, Male Pins | D-Sub Plug, Male Pins |
| 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 | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | Panel Mount, Through Hole | Panel Mount, Through Hole |
| Termination Method | Solder | Solder | Solder | Solder | Solder | Solder | Solder | Solder | Solder | Solder | Solder |
| Shell Material / Finish | Steel, Tin Plated | Steel, Tin Plated | Steel | Steel | Steel, Tin Plated | Steel, Tin Plated | Steel, Tin Plated | Steel, Tin Plated | Steel, Tin Plated | Steel, Tin Plated | Steel, Nickel Plated |
| Flange Feature | Housing/Shell (Unthreaded) | Housing/Shell (Unthreaded) | Housing/Shell (Unthreaded) | Mating Side, Female Screwlock (4-40) | Mating Side, Female Screwlock (4-40) | Mating Side, Female Screwlock (4-40) | Mating Side, Female Screwlock (4-40) | Mating Side, Female Screwlock (4-40) | Mating Side, Female Screwlock (4-40) | Housing/Shell (Unthreaded) | Board Side (4-40); Mating Side, Female Screwlock (4-40) |
| Current Rating (Amps) | 7.5A | 7.5A | 7.5A | 6.5A | 6A | 6A | 6A | 6A | 6A | 5A | 5A |
| Voltage Rating | 300V | 300V | 100V | Not Specified | 125V | 125V | 125V | 125V | 125V | Not Specified | Not Specified |
| Operating Temperature | -55°C to 155°C | -55°C to 125°C | -20°C to 125°C | -55°C to 125°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 | -50°C to 100°C | -50°C to 100°C |
| Contact Finish | Gold (20.0µin) | Gold (20.0µin) | Not Specified | Not Specified | Gold (Flash) | Gold (Flash) | Gold (Flash) | Gold (Flash) | Gold (Flash) | Gold (Flash) | Gold (Flash) |
| Contact Material | Brass | Brass | Copper Alloy | Copper Alloy | Brass | Brass | Brass | Brass | Brass | Brass | Brass |
| Contact Form | Machined | Machined | Machined | Stamped | Not Specified | Not Specified | Not Specified | Not Specified | Not Specified | Machined | Machined |
| Dielectric Material | Thermoplastic, Glass Filled | Thermoplastic, Glass Filled | Polycyclohexylenedimethylene Terephthalate (PCT) | Polybutylene Terephthalate (PBT), Polyester, Glass Filled | Polyester | Polyester | Polyester | Polyester | Polyester | Polybutylene Terephthalate (PBT), Polyester | Polyamide (PA6T), Nylon 6T |
| Material Flammability | 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 |
| RoHS Compliance | RoHS Compliant | RoHS Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | RoHS Compliant | RoHS non-compliant | ROHS3 Compliant | ROHS3 Compliant |
| Product Status | Obsolete | Active | Active | Active | Active | Active | Active | Active | Active | Obsolete | Active |
Engineering Selection Recommendations
Primary Recommended Substitute: L717DFB25POL2 The L717DFB25POL2 (Amphenol ICC) is the manufacturer-recommended upgrade path from the obsolete L77DFB25POL2. This component maintains electrical equivalence with identical connector type, positions, shell size, mounting configuration, and termination method. The L717DFB25POL2 carries Active product status with RoHS compliance certification, ensuring long-term availability and regulatory alignment. Operating temperature range reduction from -55°C to 155°C to -55°C to 125°C must be evaluated against specific application thermal requirements.
Panel Mount Alternative with Screwlock Feature: 172-E25-113R911 The 172-E25-113R911 (NorComp Inc., Active status, ROHS3 Compliant) provides equivalent panel mount configuration with additional board-side and mating-side female screwlock features (4-40) for enhanced mechanical retention. This alternative accommodates applications requiring board-locking functionality. Current rating (5A) is lower than the original specification and requires design verification.
Through Hole Vertical Orientation Alternatives: TE Connectivity AMPLIMITE HD-20 Series The 1-5745968-3, 1-5745968-4, 1-5745968-5, 1-5745968-6, and 1-745968-4 from TE Connectivity (AMPLIMITE HD-20 Series) represent Active substitutes with identical core D-Sub 25-position, Shell Size 3, solder termination specifications. These parts feature mating-side female screwlock (4-40) connectors and Through Hole vertical mounting orientation, distinguishing them from panel mount applications. Current rating (6A), voltage rating (125V), and reduced operating temperature maximum (-55°C to 105°C) require application assessment. RoHS compliance varies across variants (ROHS3 Compliant, RoHS Compliant, or RoHS non-compliant for 1-745968-4).
HARTING Alternatives: 09643227240 and 09653617713 The 09643227240 (HARTING, Active, ROHS3 Compliant) and 09653617713 (HARTING, Active, ROHS3 Compliant) provide D-Sub 25-position through-hole vertical solder configuration with reduced voltage rating specifications. 09643227240 includes filter and grounding indent features; 09653617713 incorporates stamped contact form and board lock features. Copper alloy contact material, dielectric material composition, and contact finish specifications differ from the original and must be validated for electromagnetic compatibility and reliability performance.
Frequently Asked Questions (FAQ)
Q: Can the L717DFB25POL2 directly replace the L77DFB25POL2 without circuit board redesign? A: The L717DFB25POL2 maintains identical electrical and mechanical specifications for connector type, positions, shell size, mounting type, and termination method. Physical form factor compatibility exists without design modification. The operating temperature maximum reduction (from 155°C to 125°C) must be verified against application thermal environment specifications.
Q: What is the functional difference between panel mount and through hole vertical mounting configurations? A: Panel mount (L77DFB25POL2, L717DFB25POL2, 172-025-112R001, 172-E25-113R911) attaches the connector to a panel surface with the shell face perpendicular to the mounting surface. Through hole vertical (TE Connectivity and HARTING variants) positions the connector parallel to the mounting surface for vertical insertion. Flange feature design differs accordingly—panel mount uses unthreaded shell housing; through hole vertical employs screwlock mating features for retention.
Q: Are the NorComp 172-E25-113R911 board lock features backward compatible with designs using the unthreaded L77DFB25POL2 shell? A: No. The 172-E25-113R911 includes board-side and mating-side female screwlock (4-40) features that require corresponding receptacle connector design modifications. Unthreaded shell designs (L77DFB25POL2, L717DFB25POL2) cannot utilize board lock functionality without circuit board alteration.
Q: How do contact finish specifications affect electromagnetic performance and reliability? A: The L77DFB25POL2 specifies 20.0µin (0.51µm) gold contact finish, providing controlled plating thickness for contact resistance and long-term environmental durability. Flash gold finishes on TE Connectivity and NorComp alternatives do not define thickness specification and may exhibit variable contact performance. Design verification is required for applications with strict electromagnetic interference (EMI) or signal integrity requirements.
Q: Why do substitute parts show reduced current and voltage ratings compared to the original L77DFB25POL2? A: Current rating (7.5A) and voltage rating (300V) on the original L77DFB25POL2 reflect specific shell size, contact material, and contact geometry design parameters. Substitute components from alternative manufacturers employ different contact form, material composition, and shell configuration, resulting in reduced electrical specifications. Application power delivery requirements must be assessed against available substitute current and voltage capacities.
Q: Which substitute parts maintain RoHS compliance alignment with the original specification? A: The L717DFB25POL2 (RoHS Compliant), 09643227240 (ROHS3 Compliant), 09653617713 (ROHS3 Compliant), 1-5745968-3 through 1-5745968-6 (ROHS3 Compliant or RoHS Compliant variants), and 172-025-112R001 and 172-E25-113R911 (ROHS3 Compliant) all meet RoHS regulatory requirements. The 1-745968-4 (RoHS non-compliant) and its associated REACH Affected status require exclusion from new designs subject to RoHS directive enforcement.
Q: Can TE Connectivity AMPLIMITE HD-20 series connectors operate at the original temperature extremes (-55°C to 155°C)? A: No. TE Connectivity AMPLIMITE HD-20 variants (1-5745968-3 through 1-745968-4) specify -55°C to 105°C operating range, limiting maximum temperature 50°C below the original specification. Applications requiring sustained operation above 105°C cannot utilize these substitutes without thermal environment design modification.
Q: What packaging format differences exist across substitute components? A: The L77DFB25POL2 is packaged in bulk; L717DFB25POL2 uses tray packaging; HARTING 09643227240 and 09653617713 use bulk packaging; TE Connectivity variants use tube packaging (1-5745968-3 through 1-5745968-6) or bulk (1-745968-4); NorComp 172-025-112R001 and 172-E25-113R911 use tray packaging. Packaging format affects supply chain handling, storage requirements, and manufacturing integration processes but does not impact electrical or mechanical connector performance.
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