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L77DFB25SOL2RM8 Equivalent & Substitute Parts
Part Overview
The L77DFB25SOL2RM8 is a 25-position D-Sub receptacle connector manufactured by Amphenol ICC for panel-mount through-hole solder applications. This connector is classified as active inventory with 782 units in stock and operates across a wide temperature range (-55°C to 155°C) with a 7.5A current rating and 300V voltage rating. Alternative parts may be required due to lead time constraints, specific application requirements, or design revision needs that necessitate different mounting configurations or material specifications.
Substiute Parts
Key Parameters
| Parameter | L77DFB25SOL2RM8 |
|---|---|
| Manufacturer | Amphenol ICC (Commercial Products) |
| Connector Type | D-Sub Receptacle, Female Sockets |
| Positions | 25 Position, 2 Row (Shell Size 3 / DB-B) |
| Mounting Type | Panel Mount, Through Hole |
| Flange Feature | Housing/Shell (Unthreaded) |
| Termination | Solder |
| Current Rating | 7.5A |
| Voltage Rating | 300V |
| Operating Temperature | -55°C ~ 155°C |
| Shell Material/Finish | Steel, Tin Plated |
| Contact Finish | Gold (20.0µin) |
| RoHS Status | RoHS Compliant |
| Compliance Certifications | UL94 V-0, EAR99, ECCN |
Substitute Part Grouping Explanation
Substitution eligibility is determined by conformance to the following critical parameters: 25-position D-Sub receptacle configuration with 2-row layout (Shell Size 3 / DB-B), receptacle female socket connector type, solder termination, panel-mount through-hole mounting, and UL94 V-0 flammability rating. Substitute parts must maintain the same electrical contact type (signal) and basic connector geometry to ensure mechanical and electrical compatibility with mating 25-pin D-Sub plugs.
Secondary parameters that define substitution groups include current rating (minimum 5A acceptable for applications not exceeding 7.5A), operating temperature range capability (parts must support the application's minimum and maximum operating temperatures), shell material and finish (affecting durability), contact finish specifications (gold plating), and flange configuration (unthreaded housing or board-side/mating-side mounting provisions). Voltage rating variations are acceptable where the substitute part rating equals or exceeds the application requirement. RoHS compliance status and regulatory certifications (ECCN, HTSUS) confirm regulatory acceptability in supply chain applications.
Parameter Comparison
| Part Number | Manufacturer | Positions | Connector Type | Mounting | Flange Type | Current (A) | Voltage (V) | Temp Range (°C) | Shell/Finish | Contact Finish | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|---|---|
| L77DFB25SOL2RM8 | Amphenol ICC | 25P, 2 Row | Receptacle, Female | Panel Mount, TH | Housing (Unthreaded) | 7.5 | 300 | -55 to 155 | Steel, Tin Plated | Gold (20.0µin) | RoHS Compliant |
| 172-E25-213R001 | NorComp Inc. | 25P, 2 Row | Receptacle, Female | Panel Mount, TH | Housing (Unthreaded) | 5 | Not Specified | -50 to 100 | Steel, Nickel Plated | Gold (Flash) | ROHS3 Compliant |
| 172-E25-213R011 | NorComp Inc. | 25P, 2 Row | Receptacle, Female | Panel Mount, TH | Board Side (4-40) | 5 | Not Specified | -50 to 100 | Steel, Nickel Plated | Gold (Flash) | ROHS3 Compliant |
| 172-E25-213R031 | NorComp Inc. | 25P, 2 Row | Receptacle, Female | Panel Mount, TH | Mating Side (4-40) | 5 | Not Specified | -50 to 100 | Steel, Nickel Plated | Gold (Flash) | ROHS3 Compliant |
| 172-E25-213R911 | NorComp Inc. | 25P, 2 Row | Receptacle, Female | Panel Mount, TH | Board Side (4-40) + Mating Side Screwlock (4-40) | 5 | Not Specified | -50 to 100 | Steel, Nickel Plated | Gold (Flash) | ROHS3 Compliant |
| 2-338315-2 | TE Connectivity AMP | 25P, 2 Row | Receptacle, Female | Through Hole | Housing/Shell (M3) | 6 | Not Specified | -55 to 105 | Steel, Tin Plated | Gold | ROHS3 Compliant |
| 2-747708-0 | TE Connectivity AMP | 25P, 2 Row | Receptacle, Female | Through Hole | Housing/Shell (4-40) | 6 | 125 | -55 to 105 | Steel, Tin Plated | Gold (30.0µin) | RoHS non-compliant |
| 207828-3 | TE Connectivity AMP | 25P, 2 Row | Receptacle, Female | Through Hole | Housing/Shell (Unthreaded) | 6 | 125 | -55 to 105 | Not Specified | Gold (Flash) | RoHS non-compliant |
| 207828-4 | TE Connectivity AMP | 25P, 2 Row | Receptacle, Female | Through Hole | Housing/Shell (Unthreaded) | 6 | 125 | -55 to 105 | Not Specified | Gold (30.0µin) | RoHS non-compliant |
| 5-338315-2 | TE Connectivity AMP | 25P, 2 Row | Receptacle, Female | Through Hole | Housing/Shell (Unthreaded) | 6 | Not Specified | -55 to 105 | Steel, Tin Plated | Gold | ROHS3 Compliant |
| 5207828-4 | TE Connectivity AMP | 25P, 2 Row | Receptacle, Female | Through Hole | Housing/Shell (Unthreaded) | 6 | 125 | -55 to 105 | Not Specified | Gold (30.0µin) | RoHS Compliant |
Engineering Selection Recommendations
Primary Substitutes (Optimal Compatibility):
NorComp 172-E25-213R001 and NorComp 172-E25-213R011 provide the closest physical and electrical compatibility to the L77DFB25SOL2RM8, offering identical 25-position D-Sub receptacle configuration with panel-mount solder termination. Both are ROHS3 compliant and feature active product status. The primary limiting factor is reduced current rating (5A versus 7.5A) and lower maximum operating temperature (100°C versus 155°C), which limits application to designs not requiring the full thermal or current capability of the primary part.
The NorComp 172-E25-213R031 and 172-E25-213R911 variants offer the same electrical specifications as 172-E25-213R001 but with alternative flange mounting provisions (mating-side and combined board/mating-side mounting), providing design flexibility where panel-mount unthreaded housing does not meet mechanical constraints.
Secondary Substitutes (Design Variation Required):
TE Connectivity parts (2-338315-2, 2-747708-0, 207828-3, 207828-4, 5-338315-2, 5207828-4) maintain the 25-position D-Sub receptacle configuration and solder termination but with vertical (not panel) mounting orientation. These parts require PCB footprint redesign and do not support panel-mount installation directly. Current rating (6A) is adequate for most applications below the L77DFB25SOL2RM8 specification. Part 5207828-4 demonstrates RoHS compliance and 125V voltage rating with extended temperature capability (-55°C to 105°C), suitable where maximum temperature does not exceed 105°C.
Parts 2-747708-0, 207828-3, and 207828-4 exhibit RoHS non-compliance status and are not recommended for new designs in regulated supply chains.
Frequently Asked Questions (FAQ)
Q: Can NorComp 172-E25 series parts directly replace the L77DFB25SOL2RM8?
A: NorComp 172-E25-213R001 provides direct panel-mount replacement where application current does not exceed 5A and operating temperature remains within -50°C to 100°C. The unthreaded housing flange matches the original part. Variants 172-E25-213R011 and 172-E25-213R031 are electrically equivalent but require mechanical redesign due to board-side or mating-side mounting features.
Q: What is the primary limitation of TE Connectivity AMPLIMITE series as substitutes?
A: TE Connectivity parts 2-338315-2, 2-747708-0, 207828-3, 207828-4, 5-338315-2, and 5207828-4 are designed for vertical through-hole (not panel) mounting, requiring PCB layout redesign. These parts are not direct plug-in replacements for panel-mount applications.
Q: Which substitute parts are RoHS compliant?
A: NorComp 172-E25 series (all variants: 213R001, 213R011, 213R031, 213R911) and TE Connectivity 2-338315-2, 5-338315-2, and 5207828-4 are certified RoHS3 compliant or RoHS compliant. Parts 2-747708-0, 207828-3, and 207828-4 are RoHS non-compliant.
Q: Are there substitutes with voltage rating equal to or greater than 300V?
A: No substitute parts in the provided list exceed or match the 300V rating of L77DFB25SOL2RM8. NorComp parts have unspecified voltage ratings. TE Connectivity parts are rated at 125V maximum. Applications requiring 300V operation cannot be substituted.
Q: What are the temperature limitations for substitutes?
A: NorComp 172-E25 series supports -50°C to 100°C. TE Connectivity AMPLIMITE series (2-338315-2, 2-747708-0, 207828-3, 207828-4, 5-338315-2, 5207828-4) supports -55°C to 105°C. The L77DFB25SOL2RM8 extends to 155°C, exceeding all substitute parts. Applications operating above 105°C cannot use listed substitutes.
Q: What packaging formats are available?
A: L77DFB25SOL2RM8 is supplied in tray packaging. NorComp 172-E25 series is tray-packaged. TE Connectivity 2-338315-2 and 5-338315-2 are bulk-packaged. TE Connectivity 2-747708-0, 207828-3, 207828-4, and 5207828-4 are tube-packaged. Packaging format affects storage, handling, and inventory management but not electrical performance.
Q: Can the lower current rating of NorComp parts (5A) be used in 7.5A applications?
A: No. Using a 5A-rated connector in a 7.5A application exceeds rated electrical capability and creates thermal stress and potential contact degradation. Substitution is limited to designs operating at or below 5A.
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