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L77DFBG25SOL2 Equivalent & Substitute Parts
Part Overview
The L77DFBG25SOL2 is a 25-position D-Sub receptacle connector manufactured by Amphenol ICC (Commercial Products). This panel-mount, solder-terminated connector features female sockets in a 2-row configuration with shell size 3 (DB, B) layout. The connector is designed for signal applications requiring reliable through-hole panel mounting with board-side M3 flange attachment.
The L77DFBG25SOL2 maintains active product status with 728 units in current inventory. Equivalent and substitute parts are identified based on matching core electrical and mechanical parameters: 25-position configuration, D-Sub receptacle type, female socket contact form, panel mount through-hole installation, solder termination, and UL94 V-0 flammability rating. Substitute selection becomes necessary when specific flange configurations, current ratings, temperature ranges, or compliance certifications differ from the primary part specification.
Substiute Parts
Key Parameters
| Parameter | L77DFBG25SOL2 Specification |
|---|---|
| Connector Type | D-Sub Receptacle, Female Sockets |
| Number of Positions | 25 |
| Number of Rows | 2 |
| Shell Size, Connector Layout | 3 (DB, B) |
| Mounting Type | Panel Mount, Through Hole |
| Termination | Solder |
| Flange Feature | Board Side (M3) |
| Current Rating | 7.5A |
| Voltage Rating | 300V |
| Operating Temperature Range | -55°C ~ 155°C |
| Shell Material, Finish | Steel, Tin Plated |
| Contact Finish | Gold, 20.0µin (0.51µm) |
| Contact Material | Copper Alloy |
| Dielectric Material | Thermoplastic, Glass Filled |
| Material Flammability Rating | UL94 V-0 |
| RoHS Status | RoHS Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitute parts for the L77DFBG25SOL2 are grouped based on strict adherence to the following core parameters that define functional equivalence:
Critical Matching Parameters:
- Connector type: D-Sub receptacle with female sockets
- Position count: 25 positions in 2-row configuration
- Shell size and layout: Size 3 (DB, B)
- Mounting method: Panel mount, through-hole installation
- Termination method: Solder
- Contact form: Machined female sockets
- Material flammability: UL94 V-0 rating
Variable Parameters Affecting Substitution:
- Flange feature configuration (board-side M3, board-side 4-40, mating-side 4-40, housing/shell unthreaded)
- Current rating (7.5A primary specification; 5A and 6A alternatives available)
- Voltage rating (300V primary; alternatives with unspecified or 125V ratings)
- Operating temperature range (-55°C ~ 155°C primary; -50°C ~ 100°C and -55°C ~ 105°C alternatives)
- Shell material finish (tin-plated primary; nickel-plated alternatives)
- Contact material (copper alloy primary; brass and phosphor bronze alternatives)
- Dielectric material composition (thermoplastic glass-filled primary; polyamide and polyester alternatives)
- RoHS compliance status (RoHS Compliant primary; ROHS3 Compliant alternatives)
Substitutes are presented in two categories: NorComp Inc. 172-E series connectors and TE Connectivity AMP Connectors series. Each substitute maintains the fundamental D-Sub 25-position receptacle architecture while offering variations in flange attachment, current handling, temperature performance, and regulatory compliance.
Parameter Comparison
| Parameter | L77DFBG25SOL2 (Amphenol ICC) | 172-E25-213R001 (NorComp) | 172-E25-213R011 (NorComp) | 172-E25-213R031 (NorComp) | 172-E25-213R911 (NorComp) | 2-338315-2 (TE Connectivity) | 2-747708-0 (TE Connectivity) | 207828-3 (TE Connectivity) | 207828-4 (TE Connectivity) | 5-338315-2 (TE Connectivity) | 5207828-4 (TE Connectivity) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Connector Type | D-Sub Receptacle, Female Sockets | D-Sub Receptacle, Female Sockets | D-Sub Receptacle, Female Sockets | D-Sub Receptacle, Female Sockets | D-Sub Receptacle, Female Sockets | D-Sub Receptacle, Female Sockets | D-Sub Receptacle, Female Sockets | D-Sub Receptacle, Female Sockets | D-Sub Receptacle, Female Sockets | D-Sub Receptacle, Female Sockets | D-Sub Receptacle, Female Sockets |
| 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 | 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 |
| Flange Feature | Board Side (M3) | 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) |
| 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 ~ 155°C | -50°C ~ 100°C | -50°C ~ 100°C | -50°C ~ 100°C | -50°C ~ 100°C | -55°C ~ 105°C | -55°C ~ 105°C | -55°C ~ 105°C | -55°C ~ 105°C | -55°C ~ 105°C | -55°C ~ 105°C |
| 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 Finish | Gold, 20.0µin (0.51µm) | Gold, Flash | Gold, Flash | Gold, Flash | Gold, Flash | Gold | Gold, 30.0µin (0.76µm) | Gold, Flash | Gold, 30.0µin (0.76µm) | Gold | Gold, 30.0µin (0.76µm) |
| Contact Material | Copper Alloy | Brass | Brass | Brass | Brass | Phosphor Bronze | Phosphor Bronze | Phosphor Bronze | Phosphor Bronze | Phosphor Bronze | Phosphor Bronze |
| Dielectric Material | Thermoplastic, Glass Filled | Polyamide (PA6T), Nylon 6T | Polyamide (PA6T), Nylon 6T | Polyamide (PA6T), Nylon 6T | Polyamide (PA6T), Nylon 6T | Polyester, Glass Filled | Thermoplastic | Polyester | Polyester | Polyester, Glass Filled | Polyester |
| 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 |
| 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 |
| Moisture Sensitivity Level | 1 (Unlimited) | Not Applicable | Not Applicable | Not Applicable | Not Applicable | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
Engineering Selection Recommendations
Primary Substitutes (Highest Compatibility):
The TE Connectivity 2-338315-2 and 5-338315-2 (AMPLIMITE HDP-20 series) provide the closest functional equivalence to the L77DFBG25SOL2. Both maintain the 25-position D-Sub receptacle configuration, through-hole solder termination, steel tin-plated shell, and UL94 V-0 flammability rating. The 2-338315-2 features board-side M3 flange attachment identical to the primary part, while the 5-338315-2 offers housing/shell unthreaded flange configuration. Current rating reduction from 7.5A to 6A and operating temperature range reduction from -55°C ~ 155°C to -55°C ~ 105°C represent the primary electrical differences. Both parts maintain RoHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating.
Secondary Substitutes (Moderate Compatibility):
The TE Connectivity AMPLIMITE HD-20 series (2-747708-0, 207828-3, 207828-4, 5207828-4) maintains 25-position D-Sub receptacle architecture with through-hole solder termination and UL94 V-0 rating. These parts feature phosphor bronze contacts and polyester dielectric material, differing from the primary part's copper alloy contacts and thermoplastic glass-filled dielectric. Operating temperature range is limited to -55°C ~ 105°C, and voltage rating is specified at 125V compared to the primary 300V specification. Current rating is 6A. Parts 207828-3, 207828-4, and 5207828-4 feature unthreaded housing/shell flange configuration. RoHS compliance varies: 2-747708-0 and 207828-3 and 207828-4 are RoHS non-compliant, while 5207828-4 is RoHS Compliant.
Alternative Substitutes (Limited Compatibility):
The NorComp Inc. 172-E series (172-E25-213R001, 172-E25-213R011, 172-E25-213R031, 172-E25-213R911) provides 25-position D-Sub receptacle connectors with panel-mount through-hole solder termination and UL94 V-0 rating. These parts feature nickel-plated steel shells, brass contacts, and polyamide (PA6T) nylon 6T dielectric material. Current rating is reduced to 5A, and operating temperature range is limited to -50°C ~ 100°C. Voltage rating is not specified. All four NorComp parts maintain ROHS3 compliance and Not Applicable moisture sensitivity level. Flange configurations vary: 172-E25-213R001 offers unthreaded housing/shell, 172-E25-213R011 provides board-side 4-40, 172-E25-213R031 features mating-side 4-40, and 172-E25-213R911 combines board-side 4-40 with mating-side female screwlock 4-40 and board lock feature.
Compliance Considerations:
Applications requiring RoHS compliance should prioritize 2-338315-2, 5-338315-2, 172-E series parts, or 5207828-4. Applications requiring REACH compliance should avoid 2-747708-0, 207828-3, and 207828-4, which are REACH Affected. The primary L77DFBG25SOL2 is RoHS Compliant with REACH status not specified in provided data.
Temperature and Current Derating:
Substitutes with reduced operating temperature ranges (-50°C ~ 100°C or -55°C ~ 105°C) are not suitable for applications requiring the full -55°C ~ 155°C range of the primary part. Substitutes with 5A or 6A current ratings require circuit derating compared to the primary 7.5A specification.
Frequently Asked Questions (FAQ)
Q: Can the NorComp 172-E25-213R001 directly replace the L77DFBG25SOL2 in all applications?
A: The 172-E25-213R001 maintains the core 25-position D-Sub receptacle architecture, panel-mount through-hole solder termination, and UL94 V-0 flammability rating. However, three critical differences exist: current rating is reduced from 7.5A to 5A, operating temperature range is limited to -50°C ~ 100°C compared to -55°C ~ 155°C, and flange configuration differs (unthreaded housing/shell versus board-side M3). Direct replacement is only suitable for applications operating within -50°C ~ 100°C temperature range and requiring maximum 5A current. Flange attachment method must be verified for mechanical compatibility.
Q: What is the difference between the TE Connectivity 2-338315-2 and 5-338315-2?
A: Both parts are AMPLIMITE HDP-20 series 25-position D-Sub receptacles with identical electrical specifications: 6A current rating, -55°C ~ 105°C operating temperature, steel tin-plated shell, gold-plated copper alloy contacts, and UL94 V-0 rating. The primary difference is flange configuration: 2-338315-2 features housing/shell M3 flange attachment, while 5-338315-2 features housing/shell unthreaded flange. The 2-338315-2 provides closer mechanical compatibility to the L77DFBG25SOL2 board-side M3 flange, though the flange attachment method differs (housing/shell versus board-side).
Q: Why do some substitute parts have unspecified voltage ratings?
A: Voltage rating specifications are provided by manufacturers based on design validation and application requirements. NorComp 172-E series parts do not specify voltage rating in the provided data, indicating either that voltage rating is not a primary design parameter for these connectors or that rating information was not included in the technical documentation. TE Connectivity AMPLIMITE HDP-20 series parts specify 125V voltage rating. The primary L77DFBG25SOL2 specifies 300V. Applications requiring specific voltage ratings should select parts with matching or higher voltage specifications.
Q: Are all substitute parts suitable for RoHS-compliant applications?
A: No. RoHS compliance status varies among substitutes. RoHS Compliant or ROHS3 Compliant parts include: 2-338315-2, 5-338315-2, all NorComp 172-E series (172-E25-213R001, 172-E25-213R011, 172-E25-213R031, 172-E25-213R911), and 5207828-4. RoHS non-compliant parts include: 2-747708-0, 207828-3, and 207828-4. Applications requiring RoHS compliance must exclude non-compliant parts.
Q: What is the significance of contact finish thickness specifications?
A: Contact finish thickness affects contact durability, wear resistance, and long-term reliability. The primary L77DFBG25SOL2 specifies 20.0µin (0.51µm) gold plating. Substitute parts specify either flash gold plating (thickness not quantified), 30.0µin (0.76µm) gold plating, or unspecified gold plating. Flash plating provides minimal corrosion protection and is suitable for low-cycle mating applications. Thicker plating (30.0µin) provides enhanced durability for high-cycle mating or harsh environments. Applications requiring specific contact durability should select parts with matching or thicker gold plating specifications.
Q: How do dielectric material differences affect connector performance?
A: The primary L77DFBG25SOL2 uses thermoplastic glass-filled dielectric material. Substitute parts use polyamide (PA6T) nylon 6T, polyester, or thermoplastic dielectric materials. Dielectric material affects electrical insulation properties, temperature stability, moisture absorption, and mechanical strength. Polyamide materials typically offer good mechanical properties and moisture resistance. Polyester materials provide good electrical insulation and temperature stability. Glass-filled variants enhance mechanical strength and dimensional stability. All substitute parts maintain UL94 V-0 flammability rating, indicating equivalent flame resistance. Material selection should consider application environment, temperature exposure, and moisture conditions.
Q: What packaging differences exist among substitute parts?
A: The primary L77DFBG25SOL2 is supplied in Tray packaging. Substitute parts are supplied in Tray, Bulk, or Tube packaging. Tray packaging provides organized component presentation suitable for automated assembly. Bulk packaging provides loose components in larger quantities. Tube packaging provides individual component protection in cylindrical containers. Packaging selection affects inventory management, component handling, and assembly process compatibility. Verify packaging compatibility with receiving, storage, and assembly procedures before part selection.
Q: Can substitutes with lower current ratings be used in applications requiring 7.5A?
A: No. Substitutes with 5A or 6A current ratings cannot be used in applications requiring 7.5A continuous current. Using undersized current-rated connectors results in excessive contact heating, accelerated contact wear, and potential connector failure. Applications requiring 7.5A current must use the primary L77DFBG25SOL2 or equivalent parts with matching or higher current ratings. No current derating or parallel connection methods are specified in the provided technical data.
Q: What are the implications of operating temperature range differences?
A: The primary L77DFBG25SOL2 operates across -55°C ~ 155°C. NorComp 172-E series parts are limited to -50°C ~ 100°C, and TE Connectivity AMPLIMITE series parts are limited to -55°C ~ 105°C. Substitutes with reduced temperature ranges are not suitable for applications requiring full -55°C ~ 155°C operation. Applications operating at temperatures above 105°C or below -50°C must use the primary part or equivalent parts with matching temperature specifications. Temperature derating or thermal management modifications are not specified in the provided data.
Q: How do flange configuration differences affect mechanical installation?
A: The primary L77DFBG25SOL2 features board-side M3 flange attachment, requiring M3 threaded holes on the mounting panel. Substitute parts offer various flange configurations: housing/shell unthreaded (no threaded attachment), housing/shell M3 (identical to primary), housing/shell 4-40 (requires 4-40 threaded holes), board-side 4-40 (requires 4-40 threaded holes on mounting panel), and mating-side 4-40 (requires 4-40 threaded holes on mating connector). Flange configuration must match panel mounting hole specifications. Mechanical compatibility requires verification of mounting hole size, thread type, and flange attachment method before part substitution.
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