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L77SDBH25SOL2G D-Sub 25 Position Receptacle Connector Equivalent & Substitute Parts
Part Overview
The L77SDBH25SOL2G is a 25 position D-Sub receptacle connector manufactured by Amphenol ICC (Commercial Products). This connector features female sockets, vertical through-hole mounting, and solder termination. The part is classified as an active product with full inventory availability (1109 pieces in stock). D-Sub receptacle connectors serve as mating interfaces for signal transmission in industrial, computing, and telecommunications applications. Equivalent and substitute parts are identified to provide design flexibility, ensure supply chain continuity, and accommodate specific application requirements such as flange configuration, current rating, or compliance certifications.
Substiute Parts
Key Parameters
| Parameter | L77SDBH25SOL2G |
|---|---|
| Connector Type | Receptacle, Female Sockets |
| Number of Positions | 25 |
| Number of Rows | 2 |
| Shell Size, Connector Layout | 3 (DB, B) |
| Mounting Type | Through Hole |
| Termination | Solder |
| Shell Material, Finish | Steel, Tin Plated |
| Contact Finish | Gold |
| Current Rating (Amps) | 3A |
| Voltage Rating | 250V |
| Operating Temperature | -55°C ~ 125°C |
| Material Flammability Rating | UL94 V-0 |
| RoHS Status | RoHS Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitute parts for the L77SDBH25SOL2G are identified based on strict electrical and mechanical compatibility criteria. All substitute parts maintain the following core parameters identical to the main part:
Mandatory Matching Parameters:
- Connector Type: Receptacle, Female Sockets
- Number of Positions: 25
- Number of Rows: 2
- Shell Size, Connector Layout: 3 (DB, B)
- Mounting Type: Through Hole
- Termination: Solder
- Shell Material, Finish: Steel, Tin Plated
- Contact Finish: Gold
- Material Flammability Rating: UL94 V-0
- Moisture Sensitivity Level (MSL): 1 (Unlimited)
Variable Parameters Affecting Substitution:
- Current Rating: Main part rated 3A; substitute parts rated 6A (higher rating is acceptable for applications requiring ≤3A)
- Voltage Rating: Main part rated 250V; substitute parts rated 125V (lower rating requires application verification)
- Operating Temperature: Main part rated -55°C ~ 125°C; substitute parts rated -55°C ~ 105°C (narrower range requires application verification)
- Flange Feature: Varies between Board Side (4-40), Housing/Shell (4-40), Housing/Shell (M3), Mating Side Female Screwlock (4-40), and Housing/Shell (Unthreaded)
- Contact Finish Thickness: Flash or 30.0µin (0.76µm)
- Dielectric Material: Thermoplastic Glass Filled, Polyester Glass Filled, Polyester, or Thermoplastic
- RoHS Status: RoHS Compliant, ROHS3 Compliant, or RoHS non-compliant
- REACH Status: REACH Affected, REACH Unaffected, or Vendor Undefined
Substitute parts are grouped by manufacturer (TE Connectivity AMP Connectors) and series (AMPLIMITE HD-20 or AMPLIMITE HDP-20). Selection of a specific substitute requires verification that the application voltage and temperature requirements do not exceed the substitute part's ratings, and that the flange configuration is compatible with the PCB or mounting structure.
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Series | Connector Type | Positions | Rows | Shell Size | Mounting Type | Termination | Shell Material, Finish | Contact Finish | Current Rating (A) | Voltage Rating (V) | Operating Temp (°C) | Flange Feature | Flammability | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| L77SDBH25SOL2G | Amphenol ICC | SD | Receptacle, Female Sockets | 25 | 2 | 3 (DB, B) | Through Hole | Solder | Steel, Tin Plated | Gold | 3 | 250 | -55 ~ 125 | Board Side (4-40) | UL94 V-0 | RoHS Compliant |
| 1-338315-2 | TE Connectivity AMP | AMPLIMITE HDP-20 | Receptacle, Female Sockets | 25 | 2 | 3 (DB, B) | Through Hole | Solder | Steel, Tin Plated | Gold | 6 | — | -55 ~ 105 | Housing/Shell (4-40) | UL94 V-0 | ROHS3 Compliant |
| 1-5745967-0 | TE Connectivity AMP | AMPLIMITE HD-20 | Receptacle, Female Sockets | 25 | 2 | 3 (DB, B) | Through Hole | Solder | Steel, Tin Plated | Gold | 6 | 125 | -55 ~ 105 | Housing/Shell (4-40) | UL94 V-0 | RoHS Compliant |
| 1-5745967-4 | TE Connectivity AMP | AMPLIMITE HD-20 | Receptacle, Female Sockets | 25 | 2 | 3 (DB, B) | Through Hole | Solder | Steel, Tin Plated | Gold | 6 | 125 | -55 ~ 105 | Mating Side, Female Screwlock (4-40) | UL94 V-0 | RoHS Compliant |
| 1-5745967-5 | TE Connectivity AMP | AMPLIMITE HD-20 | Receptacle, Female Sockets | 25 | 2 | 3 (DB, B) | Through Hole | Solder | Steel, Tin Plated | Gold | 6 | 125 | -55 ~ 105 | Mating Side, Female Screwlock (4-40) | UL94 V-0 | RoHS Compliant |
| 1-5745967-6 | TE Connectivity AMP | AMPLIMITE HD-20 | Receptacle, Female Sockets | 25 | 2 | 3 (DB, B) | Through Hole | Solder | Steel, Tin Plated | Gold | 6 | 125 | -55 ~ 105 | Mating Side, Female Screwlock (4-40) | UL94 V-0 | ROHS3 Compliant |
| 1-745967-4 | TE Connectivity AMP | AMPLIMITE HD-20 | Receptacle, Female Sockets | 25 | 2 | 3 (DB, B) | Through Hole | Solder | Steel, Tin Plated | Gold | 6 | 125 | -55 ~ 105 | Mating Side, Female Screwlock (4-40) | UL94 V-0 | RoHS non-compliant |
| 2-338315-2 | TE Connectivity AMP | AMPLIMITE HDP-20 | Receptacle, Female Sockets | 25 | 2 | 3 (DB, B) | Through Hole | Solder | Steel, Tin Plated | Gold | 6 | — | -55 ~ 105 | Housing/Shell (M3) | UL94 V-0 | ROHS3 Compliant |
| 2-5747708-0 | TE Connectivity AMP | AMPLIMITE HD-20 | Receptacle, Female Sockets | 25 | 2 | 3 (DB, B) | Through Hole | Solder | Steel, Tin Plated | Gold | 6 | 125 | -55 ~ 105 | Housing/Shell (4-40) | UL94 V-0 | ROHS3 Compliant |
| 2-747708-0 | TE Connectivity AMP | AMPLIMITE HD-20 | Receptacle, Female Sockets | 25 | 2 | 3 (DB, B) | Through Hole | Solder | Steel, Tin Plated | Gold | 6 | 125 | -55 ~ 105 | Housing/Shell (4-40) | UL94 V-0 | RoHS non-compliant |
| 207828-3 | TE Connectivity AMP | AMPLIMITE HD-20 | Receptacle, Female Sockets | 25 | 2 | 3 (DB, B) | Through Hole | Solder | — | Gold | 6 | 125 | -55 ~ 105 | Housing/Shell (Unthreaded) | UL94 V-0 | RoHS non-compliant |
Engineering Selection Recommendations
Primary Substitutes (Highest Compatibility):
Parts 1-5745967-0, 1-5745967-4, 1-5745967-5, 1-5745967-6, 2-5747708-0, and 2-747708-0 are functionally equivalent to the L77SDBH25SOL2G for applications operating at or below 125V and -55°C to 105°C. These parts maintain identical connector geometry, contact configuration, and flammability rating. The higher current rating (6A vs. 3A) provides additional design margin for applications requiring ≤3A. Selection among these parts depends on flange configuration requirements and RoHS compliance status.
RoHS Compliant Alternatives:
For applications requiring RoHS compliance, parts 1-5745967-0, 1-5745967-4, 1-5745967-5, 1-5745967-6, and 2-5747708-0 are available. Parts 1-5745967-6 and 2-5747708-0 carry ROHS3 certification. Part 1-5745967-0 carries RoHS Compliant status. Parts 1-745967-4, 2-747708-0, and 207828-3 are RoHS non-compliant and are not suitable for applications with RoHS requirements.
Flange Configuration Considerations:
The L77SDBH25SOL2G features a Board Side (4-40) flange. Substitute parts offer alternative flange configurations: Housing/Shell (4-40), Mating Side Female Screwlock (4-40), Housing/Shell (M3), and Housing/Shell (Unthreaded). Flange selection must align with PCB mounting hole specifications and mechanical assembly requirements.
Voltage and Temperature Derating:
Applications requiring the full 250V rating of the L77SDBH25SOL2G cannot use substitute parts rated at 125V. Applications requiring operation above 105°C cannot use substitute parts with the -55°C to 105°C temperature range. Part 1-338315-2 and 2-338315-2 do not specify a voltage rating and require application-specific verification.
Inventory and Packaging:
Substitute parts are available in multiple packaging formats (Tube, Tray, Bulk). Selection should account for procurement volume, storage requirements, and supply chain logistics.
Frequently Asked Questions (FAQ)
Q: Can I substitute a part with a higher current rating?
A: Yes. A substitute part rated at 6A can be used in applications requiring ≤3A. The higher current rating provides additional design margin and does not compromise performance in lower-current applications. However, the connector must still meet all other electrical and mechanical requirements of the application.
Q: What is the difference between Board Side and Housing/Shell flange configurations?
A: Board Side flanges mount directly to the PCB surface with fastening holes on the connector shell. Housing/Shell flanges mount to an external housing or bracket structure. Mating Side Female Screwlock flanges provide screw-locking capability on the mating connector interface. Selection depends on the mechanical assembly design and mounting structure available in the application.
Q: Can I use a substitute part rated at 125V in an application requiring 250V?
A: No. The voltage rating of a connector must equal or exceed the application voltage. A 125V-rated connector cannot be substituted for a 250V-rated connector. Exceeding the voltage rating creates risk of electrical breakdown and component failure.
Q: Are all substitute parts compatible with the same mating connectors?
A: Yes. All substitute parts maintain the same shell size (3, DB, B), contact configuration (25 positions, 2 rows), and contact finish (gold). They are mechanically and electrically compatible with mating connectors designed for the L77SDBH25SOL2G.
Q: What is the significance of RoHS compliance status?
A: RoHS (Restriction of Hazardous Substances) compliance indicates that the part does not contain restricted substances such as lead, cadmium, or hexavalent chromium. Applications subject to RoHS regulations (primarily in the European Union and certain industries) require RoHS-compliant components. RoHS non-compliant parts cannot be used in these applications.
Q: Does a higher operating temperature range make a part a better substitute?
A: No. The operating temperature range must meet or exceed the application requirements. The L77SDBH25SOL2G is rated -55°C to 125°C. Substitute parts rated -55°C to 105°C have a narrower range and cannot be used in applications requiring operation above 105°C. A narrower range does not provide additional benefit; it represents a limitation.
Q: What is the difference between Flash and 30.0µin (0.76µm) contact finish thickness?
A: Both are gold plating specifications on the connector contacts. Flash plating is a thin, minimal gold layer applied for corrosion protection. 30.0µin (0.76µm) is a specified thickness providing additional durability and contact reliability. Both finishes are acceptable for signal-level applications; selection depends on application requirements for contact wear resistance and longevity.
Q: Can I mix substitute parts from different manufacturers in the same assembly?
A: All substitute parts listed are manufactured by TE Connectivity AMP Connectors. The L77SDBH25SOL2G is manufactured by Amphenol ICC. While mechanically and electrically compatible, mixing parts from different manufacturers in the same assembly may introduce inconsistencies in manufacturing tolerances, material properties, and quality control standards. Design documentation should specify whether mixed-manufacturer assemblies are acceptable.
Q: What does MSL 1 (Unlimited) mean?
A: Moisture Sensitivity Level (MSL) 1 indicates the lowest moisture sensitivity classification. MSL 1 (Unlimited) means the component has no moisture sensitivity restrictions and can be stored indefinitely without special humidity control or baking procedures prior to soldering. This applies to all listed parts.
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