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DEM09S043 D-Sub 9-Position Receptacle Equivalent & Substitute Parts
Part Overview
The DEM09S043 is a 9-position D-Sub receptacle connector manufactured by Amphenol ICC (FCI) in the DM HE501 series. This free-hanging, in-line solder cup connector features female sockets with a 1 (DE, E) shell size and is rated for 7.5A per contact at 300V. The part is currently active in production with 848 units in stock.
Substitute parts are necessary when the original DEM09S043 becomes unavailable, when design requirements shift toward panel-mount configurations, or when alternative compliance certifications (such as RoHS3) are required for specific applications. The substitute parts listed maintain core electrical and mechanical compatibility while offering variations in mounting style, shell finish, and contact ratings.
Substiute Parts
Key Parameters
| Parameter | DEM09S043 Specification |
|---|---|
| Connector Type | D-Sub Receptacle, Female Sockets |
| Number of Positions | 9 |
| Shell Size, Connector Layout | 1 (DE, E) |
| Mounting Type | Free Hanging (In-Line) |
| Termination | Solder Cup |
| Current Rating | 7.5A per Contact |
| Voltage Rating | 300V |
| Operating Temperature Range | -55°C to 125°C |
| Shell Material, Finish | Steel, Yellow Cadmium Plated |
| Contact Finish | Gold |
| Flange Feature | Housing/Shell (Unthreaded) |
| Material Flammability Rating | UL94 V-0 |
| RoHS Status | RoHS non-compliant |
| Product Status | Active |
Substitute Part Grouping Explanation
Substitution eligibility for the DEM09S043 is determined by the following mandatory parameters:
Core Compatibility Parameters:
- Connector type: D-Sub receptacle, female sockets
- Number of positions: 9
- Shell size and layout: 1 (DE, E)
- Termination method: Solder cup
- Material flammability rating: UL94 V-0
Allowed Variation Parameters:
- Mounting type: Free hanging (in-line) or panel mount
- Shell finish: Yellow cadmium plated, tin plated, or nickel plated
- Current rating: 7.5A (main part) down to 3A (substitute parts)
- Voltage rating: 300V (main part) down to 250V (substitute parts)
- Operating temperature range: -55°C to 125°C (main part) to -55°C to 105°C (substitute parts)
- RoHS compliance: Non-compliant (main part) to RoHS3 compliant (substitute parts)
- Flange feature: Housing/shell (unthreaded) or cable-side/mating-side threaded options
The substitute parts listed maintain the core D-Sub 9-position receptacle architecture and solder cup termination. Variations in mounting configuration, shell plating, and electrical ratings reflect design flexibility within the D-Sub 9-position receptacle category.
Parameter Comparison
| Part Number | Manufacturer | Mounting Type | Shell Finish | Current Rating (A) | Voltage Rating (V) | Operating Temp (°C) | RoHS Status | Product Status | Inventory (Pcs) |
|---|---|---|---|---|---|---|---|---|---|
| DEM09S043 | Amphenol ICC (FCI) | Free Hanging (In-Line) | Steel, Yellow Cadmium Plated | 7.5 | 300 | -55 to 125 | RoHS non-compliant | Active | 848 |
| 171-009-202L001 | NorComp Inc. | Panel Mount | Steel, Tin Plated | 5 | — | -50 to 100 | ROHS3 Compliant | Obsolete | 3428 |
| 171-009-203L011 | NorComp Inc. | Panel Mount | Steel, Nickel Plated | 5 | — | -50 to 100 | ROHS3 Compliant | Active | 1641 |
| 171-009-203L021 | NorComp Inc. | Panel Mount | Steel, Nickel Plated | 5 | — | -50 to 100 | ROHS3 Compliant | Active | 1686 |
| 171-009-203L031 | NorComp Inc. | Panel Mount | Steel, Nickel Plated | 5 | — | -50 to 100 | ROHS3 Compliant | Active | 2276 |
| G17S0900110EU | Amphenol ICC (Commercial Products) | Free Hanging (In-Line) | Steel, Tin Plated | 5 | 250 | — | ROHS3 Compliant | Active | 3720 |
| L177SDE09S | Amphenol ICC (Commercial Products) | Free Hanging (In-Line) | Steel, Tin Plated | 3 | 250 | -55 to 105 | RoHS Compliant | Active | 1963 |
| L77SDE09SC309 | Amphenol ICC (Commercial Products) | Free Hanging (In-Line) | Steel, Tin Plated | 3 | 250 | -55 to 105 | RoHS Compliant | Active | 1364 |
| L77SDE09SVF | Amphenol ICC (Commercial Products) | Free Hanging (In-Line) | Steel, Tin Plated | 3 | 250 | -55 to 105 | RoHS Compliant | Active | 1385 |
| L77SDE09SVFC309 | Amphenol ICC (Commercial Products) | Free Hanging (In-Line) | Steel, Tin Plated | 3 | 250 | -55 to 105 | RoHS Compliant | Active | 1286 |
| L77SDE09SVFMC309 | Amphenol ICC (Commercial Products) | Free Hanging (In-Line) | Steel, Tin Plated | 3 | 250 | -55 to 125 | RoHS Compliant | Active | 1498 |
Engineering Selection Recommendations
For Free-Hanging (In-Line) Mounting with Current Derating:
The Amphenol ICC (Commercial Products) SD series parts (L177SDE09S, L77SDE09SC309, L77SDE09SVF, L77SDE09SVFC309, L77SDE09SVFMC309) maintain the same mounting configuration as the DEM09S043 but operate at reduced current ratings (3A versus 7.5A). These parts are RoHS compliant and suitable for applications where compliance certification is required. The L77SDE09SVFMC309 variant extends the operating temperature range to -55°C to 125°C, matching the original part's thermal specification.
For Panel-Mount Applications:
The NorComp Inc. 171 series (171-009-203L011, 171-009-203L021, 171-009-203L031) provides panel-mount alternatives with RoHS3 compliance. These parts are rated for 5A per contact and operate within -50°C to 100°C. The 171-009-202L001 is obsolete and should not be selected for new designs despite high inventory availability.
For RoHS Non-Compliant Applications:
The DEM09S043 remains the preferred choice for applications where RoHS compliance is not required and the full 7.5A current rating is necessary. The G17S0900110EU offers an alternative from Amphenol ICC (Commercial Products) with RoHS3 compliance, free-hanging mounting, and 5A current rating at 250V.
Compliance Considerations:
All substitute parts carry UL94 V-0 material flammability ratings. Parts designated as RoHS3 compliant or RoHS compliant are suitable for applications requiring environmental compliance. The original DEM09S043 is RoHS non-compliant and should be replaced with compliant alternatives in regulated applications.
Frequently Asked Questions (FAQ)
Q: Can I substitute a panel-mount D-Sub 9-position receptacle for the free-hanging DEM09S043?
A: Panel-mount and free-hanging configurations are mechanically distinct. Panel-mount parts (171 series) feature flange designs for PCB or chassis mounting, while the DEM09S043 is designed for in-line cable termination. Substitution requires design modification to accommodate the different mounting interface.
Q: What is the impact of reduced current rating in substitute parts?
A: The DEM09S043 is rated for 7.5A per contact, while most substitute parts (L77SDE09 series) are rated for 3A per contact. Substitution is valid only if the application current does not exceed the substitute part's rating. For applications requiring 7.5A, the G17S0900110EU (5A) or original DEM09S043 must be used.
Q: Are the NorComp 171 series parts direct replacements?
A: The 171 series parts are functionally equivalent in terms of connector type, position count, and shell size, but differ in mounting configuration (panel mount versus free hanging). They are suitable substitutes only for applications where panel mounting is acceptable.
Q: Why do some substitute parts have lower voltage ratings?
A: The DEM09S043 is rated for 300V, while substitute parts operate at 250V or unspecified voltage ratings. Substitution is valid for applications operating at or below 250V. Applications requiring 300V operation must retain the original DEM09S043 or select alternatives with equivalent voltage specifications.
Q: What is the difference between the L77SDE09 variants?
A: The L77SDE09 series differs in flange feature configuration (unthreaded housing, female screwlock 4-40, or female screwlock M3) and contact finish thickness. All variants maintain 9-position receptacle functionality, solder cup termination, and RoHS compliance. Selection depends on mating connector requirements and mechanical interface specifications.
Q: Is the 171-009-202L001 suitable for new designs?
A: No. The 171-009-202L001 is marked as obsolete and should not be selected for new designs despite current inventory availability. Active alternatives such as 171-009-203L011, 171-009-203L021, or 171-009-203L031 are recommended.
Q: Can I use a substitute part with a lower operating temperature range?
A: The DEM09S043 operates from -55°C to 125°C. Substitute parts with narrower ranges (such as -50°C to 100°C) are suitable only if the application does not require operation at the full temperature extremes of the original part. Verify application requirements before substitution.
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