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Amphenol ICC L77DB25STR063 — Equivalent & Substitute Parts
Part Overview
The Amphenol ICC L77DB25STR063 is a 25-position D-Sub receptacle connector with female sockets, vertical through-hole mounting, and solder termination. This connector features a tin-plated steel shell, gold-plated brass contacts, and operates across -55°C to 125°C with a 7.5A current rating and 300V voltage rating. The part is currently active and RoHS compliant.
Substitute components may be necessary due to supply constraints, obsolescence planning, design optimization, or application-specific mounting requirements. Available substitutes maintain the core D-Sub connector architecture while differing in flange design, shell plating, current rating, or mounting configuration.
Substiute Parts
Key Parameters
| Parameter | L77DB25STR063 |
|---|---|
| Connector Type | Receptacle, Female Sockets |
| Number of Positions | 25 |
| Shell Size / Layout | 3 (DB, B) |
| Mounting Type | Through Hole |
| Flange Feature | Housing/Shell (Unthreaded) |
| Termination | Solder |
| Shell Material / Finish | Steel, Tin Plated |
| Contact Material / Finish | Brass, Gold (8.00µin) |
| Current Rating | 7.5A |
| Voltage Rating | 300V |
| Operating Temperature | -55°C to 125°C |
| Flammability Rating | UL94 V-0 |
| RoHS Status | RoHS Compliant |
| MSL Rating | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution for the L77DB25STR063 is valid when substitute parts maintain the following critical parameters: 25-position D-Sub receptacle configuration with female sockets, shell size 3 (DB, B), through-hole mounting, solder termination, D-Sub connector style, signal contact type, and UL94 V-0 material flammability rating. Current rating must meet or exceed 5.0A. Operating temperature range must support at least -50°C to 100°C. Contact material and finish determine electrical performance equivalency.
Substitutes are grouped into three categories:
Category 1: Through-hole vertical mounting, unthreaded housing/shell flange (functionally equivalent to L77DB25STR063) Category 2: Panel-mount configurations with through-hole support and board-side or mating-side flange attachments (mounting geometry differs; appropriate for panel-integrated applications) Category 3: Through-hole vertical mounting with alternative flange mechanisms (4-40 threaded mounting holes)
Parameter Comparison
| Part Number | Manufacturer | Connector Type | Positions | Shell Size | Mounting Type | Flange Feature | Current Rating (A) | Voltage Rating (V) | Operating Temp (°C) | Shell Finish | Contact Finish | Product Status | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| L77DB25STR063 | Amphenol ICC | Receptacle, Female | 25 | 3 (DB, B) | Through Hole | Housing/Shell (Unthreaded) | 7.5 | 300 | -55 to 125 | Steel, Tin Plated | Gold | Active | RoHS Compliant |
| 172-025-212R011 | NorComp Inc. | Receptacle, Female | 25 | 3 (DB, B) | Panel Mount, Through Hole | Board Side (4-40) | 5.0 | — | -50 to 100 | Steel, Tin Plated | Gold | Obsolete | ROHS3 Compliant |
| 172-025-212R021 | NorComp Inc. | Receptacle, Female | 25 | 3 (DB, B) | Panel Mount, Through Hole | Board Side (4-40) | 5.0 | — | -50 to 100 | Steel, Tin Plated | Gold | Obsolete | ROHS3 Compliant |
| 172-E25-213R001 | NorComp Inc. | Receptacle, Female | 25 | 3 (DB, B) | Panel Mount, Through Hole | Housing/Shell (Unthreaded) | 5.0 | — | -50 to 100 | Steel, Nickel Plated | Gold | Active | ROHS3 Compliant |
| 172-E25-213R011 | NorComp Inc. | Receptacle, Female | 25 | 3 (DB, B) | Panel Mount, Through Hole | Board Side (4-40) | 5.0 | — | -50 to 100 | Steel, Nickel Plated | Gold | Active | ROHS3 Compliant |
| 172-E25-213R031 | NorComp Inc. | Receptacle, Female | 25 | 3 (DB, B) | Panel Mount, Through Hole | Mating Side (4-40) | 5.0 | — | -50 to 100 | Steel, Nickel Plated | Gold | Active | ROHS3 Compliant |
| 172-E25-213R911 | NorComp Inc. | Receptacle, Female | 25 | 3 (DB, B) | Panel Mount, Through Hole | Board Side (4-40), Mating Side Screwlock (4-40) | 5.0 | — | -50 to 100 | Steel, Nickel Plated | Gold | Active | ROHS3 Compliant |
| 2-338315-2 | TE Connectivity | Receptacle, Female | 25 | 3 (DB, B) | Through Hole | Housing/Shell (M3) | 6.0 | — | -55 to 105 | Steel, Tin Plated | Gold | Active | ROHS3 Compliant |
| 6-338315-2 | TE Connectivity | Receptacle, Female | 25 | 3 (DB, B) | Through Hole | Housing/Shell (4-40) | 6.0 | — | -55 to 105 | Steel, Tin Plated | Gold | Active | RoHS Compliant |
| D25S24A4GL00LF | Amphenol ICC (FCI) | Receptacle, Female | 25 | 3 (DB, B) | Through Hole | Housing/Shell (M3) | 5.0 | 300 | -55 to 125 | Steel, Tin-Nickel Plated | Gold | Active | RoHS Compliant |
| D25S24A4GX00LF | Amphenol ICC (FCI) | Receptacle, Female | 25 | 3 (DB, B) | Through Hole | Housing/Shell (4-40) | 5.0 | 300 | -55 to 125 | Steel, Tin-Nickel Plated | Gold | Active | RoHS Compliant |
Engineering Selection Recommendations
For Vertical Through-Hole Mounting with Unthreaded Flange (Direct Functional Equivalents):
The TE Connectivity 2-338315-2 and Amphenol FCI Delta D series (D25S24A4GL00LF, D25S24A4GX00LF) are active products suitable for replacing L77DB25STR063 in new designs. The 2-338315-2 offers 6.0A current capacity with M3 flange mounting. The D25S24 series maintains the same 7.5A equivalent performance class (5.0A per contact), 300V voltage rating, and -55°C to 125°C temperature range as the original part. The primary distinction is flange attachment mechanism: M3 threaded holes versus 4-40 threaded holes versus unthreaded housing.
For Panel-Mount Applications:
The NorComp 172-E series (172-E25-213R001, 172-E25-213R011, 172-E25-213R031, 172-E25-213R911) are active products with panel-mount through-hole configurations. These connectors feature nickel-plated shells and support board-side, mating-side, or dual-flange attachment options. The 172-E25-213R911 variant includes integrated board lock and dual screwlock features. Current rating reduces to 5.0A, and operating temperature range is -50°C to 100°C.
Obsolescence Considerations:
The NorComp 172-025 series (172-025-212R011, 172-025-212R021) are obsolete products. These parts remain functionally available but should not be selected for new designs without obsolescence risk assessment. Both variants feature 5.0A current rating and tin-plated shells.
Compliance Status:
All substitute parts maintain UL94 V-0 flammability rating and RoHS/ROHS3 compliance. Parts with "REACH Unaffected" status (D25S24 series) are preferred where REACH compliance documentation is required. TE Connectivity 6-338315-2 carries "REACH Affected" status and requires vendor-specific compliance verification.
Frequently Asked Questions (FAQ)
Q: Can the Amphenol FCI D25S24A4GX00LF replace the L77DB25STR063 in my application?
A: Yes, for vertical through-hole mounting applications. Both maintain 25-position D-Sub receptacle configuration, 300V voltage rating, -55°C to 125°C operating range, and solder termination. The primary difference is flange mounting: D25S24A4GX00LF uses 4-40 threaded holes while L77DB25STR063 uses an unthreaded housing flange. Current rating is 5.0A per contact on the D25S24 series versus 7.5A on the L77DB25STR063. Design must accommodate reduced current capacity if relevant.
Q: What is the current-carrying difference between these substitutes?
A: The L77DB25STR063 is rated for 7.5A total. The TE Connectivity 338315-2 series carries 6.0A rating. The Amphenol FCI D25S24 series and NorComp alternatives are rated at 5.0A per contact, which is the design specification for 25-position connectors in those product families. Application current requirements must remain within the substitute part's rated capacity.
Q: Are NorComp 172-025 series parts suitable for new designs?
A: No. The 172-025-212R011 and 172-025-212R021 are obsolete products. While physically available in some inventory channels, they should not be used in new designs or long-term production applications due to obsolescence risk and potential future unavailability.
Q: Which substitute has the closest mechanical fit to the L77DB25STR063?
A: The Amphenol FCI D25S24A4GL00LF provides the closest mechanical compatibility with M3 flange mounting holes, matching the unthreaded housing approach of the original part. However, actual mounting compatibility depends on PCB hole patterns and mechanical fixture design. The 172-E series NorComp alternatives are designed for panel-mount integration with different mechanical attachment requirements.
Q: Do all substitutes support the same solder termination process?
A: Yes. All listed substitutes feature solder termination equivalent to the L77DB25STR063. Pin geometry, spacing, and solderability characteristics follow D-Sub connector standards. Standard printed circuit board assembly processes apply to all parts without process modification.
Q: What compliance certifications should I verify before substitution?
A: All substitutes carry UL94 V-0 material flammability rating. Confirm RoHS/ROHS3 compliance status for your supply chain requirements. For applications requiring REACH documentation, prioritize parts with "REACH Unaffected" status (D25S24 series). TE Connectivity 6-338315-2 is marked "REACH Affected" and requires vendor compliance verification prior to use.
Q: Can I interchange NorComp panel-mount connectors with the L77DB25STR063 vertical through-hole configuration?
A: No. The NorComp 172-E series are panel-mount connectors with mechanical attachment points designed for panel integration. These cannot substitute in vertical through-hole applications without redesign of mechanical mounting structures. The 172-E variants require panel cutouts and flange-based attachment, whereas L77DB25STR063 installs directly through printed circuit board holes.
Q: What is the operating temperature impact of selecting a substitute?
A: The L77DB25STR063 operates -55°C to 125°C. The TE Connectivity 338315-2 series and Amphenol FCI D25S24 series support -55°C to 105°C (slightly reduced maximum temperature). The NorComp 172-E series operates -50°C to 100°C (reduced lower and upper temperature limits). Applications requiring full -55°C to 125°C range must use L77DB25STR063, 2-338315-2, 6-338315-2, D25S24A4GL00LF, or D25S24A4GX00LF.
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