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L77DA15ST
Part Overview
The L77DA15ST is a 15-position D-Sub receptacle connector manufactured by Amphenol ICC (Commercial Products). This vertical solder-mounted connector features female sockets with a 2-row (DA, A) shell configuration and is classified as an active product with 705 units currently in stock.
D-Sub connector substitution becomes necessary due to obsolescence, supply chain constraints, or application-specific mounting requirements. The L77DA15ST can be replaced with equivalent or functionally compatible alternatives that maintain electrical performance within specified operating parameters while accommodating variations in flange design, shell finish, and mounting orientation.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Connector Type | D-Sub Receptacle, Female Sockets |
| Positions | 15 (2 rows, DA/A configuration) |
| Mounting Type | Through Hole / Vertical Solder |
| Termination | Solder |
| Current Rating | 7.5A |
| Voltage Rating | 300V |
| Operating Temperature Range | -55°C to 125°C |
| Shell Material / Finish | Steel, Tin Plated |
| Contact Material / Finish | Brass, Gold (8.00µin / 0.203µm) |
| Flange Feature | Housing/Shell (Unthreaded) |
| Dielectric Material | Thermoplastic, Glass Filled |
| Material Flammability Rating | UL94 V-0 |
| RoHS Status | RoHS Compliant |
| ECCN / HTSUS | EAR99 / 8536.69.4040 |
Substitute Part Grouping Explanation
Substitution compatibility for the L77DA15ST is determined by the following parameters, all of which must align with the original part specification:
Critical Parameters (Must Match):
- Connector type: Receptacle, female sockets
- Pin count: 15 positions
- Shell configuration: 2-row (DA, A) layout
- Termination method: Solder
Compatible Variation Parameters (Allowed Differences):
- Mounting style: Vertical (through hole) or panel mount (through hole) remain electrically and mechanically compatible when footprint space permits
- Flange feature design: Housing/shell unthreaded, board-side threaded, or mating-side threaded configurations provide mechanical interchangeability depending on assembly requirements
- Shell finish: Steel tin-plated, steel nickel-plated, or steel tin-nickel-plated finishes maintain equivalent corrosion resistance for standard applications
- Contact finish thickness: Flash or 8.00µin gold both provide adequate contact reliability
- Dielectric material: Thermoplastic glass-filled, polybutylene terephthalate (PBT) glass-filled, polyamide nylon (PA6T), and polyester materials are substitutable within the UL94 V-0 flammability requirement
- Current rating: 3A to 7.5A per contact accommodates various load configurations
- Voltage rating: 250V to 300V maintains insulation integrity across standard industrial applications
- Operating temperature: -55°C to 125°C or -50°C to 100°C both cover typical thermal environments
Compliance Alignment:
- RoHS/ROHS3 compliance required for applications subject to hazardous substance regulations
- Material flammability rating: UL94 V-0 across all substitutes
- ECCN EAR99 classification consistent across all listed parts
Parameter Comparison
| Part Number | Manufacturer | Product Status | Positions | Mounting Type | Flange Feature | Current Rating (A) | Voltage Rating (V) | Operating Temp (°C) | Shell Finish | Contact Material | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|---|---|
| L77DA15ST | Amphenol ICC (Commercial Products) | Active | 15 (2R, DA/A) | Through Hole Vertical | Housing/Shell (Unthreaded) | 7.5 | 300 | -55 to 125 | Steel, Tin Plated | Brass | RoHS Compliant |
| 172-015-212R001 | NorComp Inc. | Obsolete | 15 (2R, DA/A) | Panel Mount, Through Hole | Housing/Shell (Unthreaded) | 5 | — | -50 to 100 | Steel, Tin Plated | Brass | ROHS3 Compliant |
| 172-015-212R911 | NorComp Inc. | Obsolete | 15 (2R, DA/A) | Panel Mount, Through Hole | Board Side (4-40); Mating Side Female Screwlock (4-40) | 5 | — | -50 to 100 | Steel, Tin Plated | Brass | ROHS3 Compliant |
| 172-E15-213R001 | NorComp Inc. | Active | 15 (2R, DA/A) | Panel Mount, Through Hole | Housing/Shell (Unthreaded) | 5 | — | -50 to 100 | Steel, Nickel Plated | Brass | ROHS3 Compliant |
| 172-E15-213R011 | NorComp Inc. | Active | 15 (2R, DA/A) | Panel Mount, Through Hole | Board Side (4-40) | 5 | — | -50 to 100 | Steel, Nickel Plated | Brass | ROHS3 Compliant |
| 172-E15-213R021 | NorComp Inc. | Active | 15 (2R, DA/A) | Panel Mount, Through Hole | Board Side (4-40) | 5 | — | -50 to 100 | Steel, Nickel Plated | Brass | ROHS3 Compliant |
| 172-E15-213R031 | NorComp Inc. | Active | 15 (2R, DA/A) | Panel Mount, Through Hole | Mating Side (4-40) | 5 | — | -50 to 100 | Steel, Nickel Plated | Brass | ROHS3 Compliant |
| 172-E15-213R911 | NorComp Inc. | Active | 15 (2R, DA/A) | Panel Mount, Through Hole | Board Side (4-40); Mating Side Female Screwlock (4-40) | 5 | — | -50 to 100 | Steel, Nickel Plated | Brass | ROHS3 Compliant |
| 2-338314-2 | TE Connectivity AMP Connectors | Active | 15 (2R, DA/A) | Through Hole Vertical | Housing/Shell (M3) | 6 | — | -55 to 105 | Steel, Tin Plated | Phosphor Bronze | RoHS Compliant |
| A-DF 15 PP/Z | Assmann WSW Components | Active | 15 (2R, DA/A) | Through Hole Vertical | Housing/Shell (Unthreaded) | 3 | 250 | -20 to 105 | Steel, Tin Plated | Copper Alloy | ROHS3 Compliant |
| D15S24A4GX00LF | Amphenol ICC (FCI) | Active | 15 (2R, DA/A) | Through Hole Vertical | Housing/Shell (4-40) | 5 | 300 | -55 to 125 | Steel, Tin-Nickel Plated | Phosphor Bronze | ROHS3 Compliant |
Engineering Selection Recommendations
Primary Substitutes (Highest Compatibility):
The NorComp 172-E series (172-E15-213R001, 172-E15-213R011, 172-E15-213R021, 172-E15-213R031, 172-E15-213R911) and the Amphenol FCI D15S24A4GX00LF provide active product status with full ROHS3 compliance. These parts maintain 15-position, 2-row DA/A configuration and solder termination. The 172-E series accommodates panel-mount applications with various flange locking options (unthreaded, board-side, or mating-side threaded). The D15S24A4GX00LF maintains vertical through-hole mounting with 300V rated insulation and -55°C to 125°C operating range, directly matching the L77DA15ST's thermal and electrical specifications.
Secondary Substitutes (Application-Dependent):
The TE Connectivity 2-338314-2 (AMPLIMITE HDP-20 series) provides vertical through-hole mounting and RoHS compliance with 6A current capacity. Its phosphor bronze contacts and board-lock feature suit applications requiring mechanical strain relief. Operating temperature range extends to -55°C to 105°C.
The Assmann A-DF 15 PP/Z connector offers active status and ROHS3 compliance but operates within -20°C to 105°C thermal range with 250V voltage rating and lower 3A current capacity per contact, suitable only for reduced-load applications.
Obsolete Alternatives (Supply Continuity Only):
NorComp 172-015 series (172-015-212R001, 172-015-212R911) carry obsolete product status and are suitable for replacement stock only where existing inventory is exhausted, not for new designs.
Frequently Asked Questions (FAQ)
Q: Can the 172-E15 NorComp series replace a vertical through-hole mounted L77DA15ST? A: The 172-E15 series features panel-mount through-hole configuration. Direct mechanical substitution requires footprint and mounting post compatibility validation. Electrical specifications remain compatible for solder-terminated 15-position receptacles.
Q: What is the impact of reduced current rating on substitution suitability? A: Substitute parts rated at 5A per contact (NorComp 172-E series) or 3A per contact (Assmann A-DF 15 PP/Z) are suitable only where circuit load does not exceed the substitute's rating. The L77DA15ST's 7.5A rating should not be assumed for parts with lower specifications. D15S24A4GX00LF maintains 5A per contact rating.
Q: How does contact material selection affect performance? A: Brass (L77DA15ST, NorComp series) and phosphor bronze (TE Connectivity 2-338314-2, Amphenol FCI D15S24A4GX00LF) contacts provide equivalent signal-carrying performance within UL94 V-0 flame-rated assemblies. Copper alloy contacts (Assmann A-DF 15 PP/Z) maintain contact reliability with reduced cost.
Q: Are shell finish variations (tin-plated vs. nickel-plated) electrically equivalent? A: Steel tin-plated and steel nickel-plated shells provide equivalent EMI shielding and corrosion resistance for standard industrial environments. Selection depends on application-specific environmental requirements and connector body color specification.
Q: What distinguishes flange design options in the 172-E15 series? A: Housing/shell unthreaded (172-E15-213R001) requires snap-fit or adhesive retention. Board-side threaded (172-E15-213R011, 172-E15-213R021) provides mechanical locking to PCB-mounted studs. Mating-side threaded (172-E15-213R031) and dual-sided locking (172-E15-213R911) enable cable-side or dual mechanical strain relief, depending on assembly configuration.
Q: Can the A-DF 15 PP/Z be used in high-current applications? A: The A-DF 15 PP/Z 3A per-contact rating restricts its use to low-signal and low-power applications only. It is not suitable for applications approaching or exceeding 5A per contact.
Q: Are RoHS and ROHS3 status differences significant for selection? A: RoHS Compliant (L77DA15ST, TE Connectivity 2-338314-2) and ROHS3 Compliant (NorComp 172-E series, Amphenol FCI D15S24A4GX00LF, Assmann A-DF 15 PP/Z) both meet hazardous substance restrictions. ROHS3 represents current directive alignment; RoHS Compliant status reflects prior compliance declaration. Both are acceptable for end-use selection.
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