DEM09PN D-Sub 9 Position Plug Connector Equivalent & Substitute Parts

Part Overview

The DEM09PN is a 9 position D-Sub plug connector manufactured by Amphenol ICC (FCI) with solder cup termination, designed for free hanging in-line applications. This connector features a DE/E shell size (Size 1) with male pins, gold-plated brass contacts, and steel yellow cadmium plated housing. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs requiring compatible D-Sub 9 position plug configurations.

Substiute Parts

DEM09PN

Amphenol ICC (FCI)In Stock: 934DEM09PN Datasheet

Current PartRFQ

DEM09P

Amphenol ICC (FCI)In Stock: 1286DEM09P Datasheet

MFR RecommendedRFQ

171-009-103L001

NorComp Inc.In Stock: 1288171-009-103L001 Datasheet

MFR RecommendedRFQ

171-009-103L011

NorComp Inc.In Stock: 1289171-009-103L011 Datasheet

MFR RecommendedRFQ

171-009-103L021

NorComp Inc.In Stock: 3649171-009-103L021 Datasheet

MFR RecommendedRFQ

L777SDEH09PVF

Amphenol ICC (Commercial Products)In Stock: 975L777SDEH09PVF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the DEM09PN is determined by strict equivalence in the following critical parameters:

Primary Equivalence Criteria:

• Connector type: Plug with male pins
• Number of positions: 9
• Shell size and layout: 1 (DE, E)
• Termination method: Solder cup
• Contact finish: Gold plated

Substitution Categories:

Category 1: Direct Functional Equivalent (Same Mounting Type) DEM09P (Amphenol ICC) maintains identical mounting type (free hanging in-line) and termination, with active product status and RoHS compliance. This represents the primary upgrade path from the obsolete DEM09PN.

Category 2: Panel Mount Alternatives (Different Mounting Type) 171-009-103L001, 171-009-103L011, and 171-009-103L021 (NorComp Inc.) provide 9 position D-Sub plug functionality with panel mount configuration instead of free hanging. These are suitable only for applications where panel mounting is acceptable.

Category 3: Free Hanging Alternative with Enhanced Features L777SDEH09PVF (Amphenol ICC Commercial Products) maintains free hanging in-line mounting with solder cup termination and includes cable side screwlock provisions. This part operates at lower current rating (3A vs 7.5A) and reduced voltage (250V vs 300V).

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Free Hanging In-Line Applications): DEM09P is the primary substitute for DEM09PN. Both maintain identical mounting configuration and current/voltage ratings. DEM09P offers active product status and RoHS compliance, addressing regulatory requirements for new designs while maintaining electrical and mechanical compatibility.

For Panel Mount Applications: The 171-009-103L series (171-009-103L001, 171-009-103L011, 171-009-103L021) provides panel mount D-Sub 9 position plug functionality. These NorComp parts are ROHS3 compliant and active. Current rating is reduced to 5A per contact and operating temperature range is narrower (-50°C ~ 100°C). Selection among the three variants depends on flange feature requirements: 171-009-103L001 uses unthreaded housing, while 171-009-103L011 and 171-009-103L021 feature cable side 4-40 mounting.

For Applications Requiring Screwlock Provisions: L777SDEH09PVF accommodates applications requiring cable side and mating side screwlock features. This part maintains free hanging in-line mounting and RoHS compliance. Current rating is limited to 3A per contact and voltage rating to 250V, requiring verification against application requirements.

Compliance Considerations: All substitute parts except DEM09PN are RoHS compliant. Applications subject to RoHS requirements must use DEM09P, 171-009-103L series, or L777SDEH09PVF. All parts maintain UL94 V-0 flammability rating and REACH unaffected status.

Frequently Asked Questions (FAQ)

Q: Can DEM09P directly replace DEM09PN in existing assemblies? A: Yes. DEM09P maintains identical mounting type (free hanging in-line), shell size (1/DE/E), position count (9), termination method (solder cup), and electrical ratings (7.5A, 300V). The primary difference is active product status and RoHS compliance. Mechanical and electrical compatibility is maintained.

Q: What are the key differences between free hanging and panel mount D-Sub 9 position plugs? A: Free hanging (in-line) connectors like DEM09PN and DEM09P attach directly to cable assemblies without panel mounting hardware. Panel mount variants (171-009-103L series) require mounting through a panel or enclosure using threaded or unthreaded flanges. Application mechanical design determines which mounting type is appropriate.

Q: Why do NorComp 171-009-103L parts have lower current ratings (5A vs 7.5A)? A: Current rating is determined by contact material, contact form, and thermal design. NorComp parts use stamped copper alloy contacts versus machined brass contacts in the Amphenol parts, resulting in different current handling capacity. Application current requirements must be verified against the 5A rating.

Q: Can L777SDEH09PVF be used in applications requiring 7.5A current? A: No. L777SDEH09PVF is rated for 3A per contact maximum. Applications requiring 7.5A current must use DEM09PN or DEM09P. Exceeding rated current will result in connector failure and potential safety hazards.

Q: What is the significance of shell finish differences (yellow cadmium, nickel, tin plated)? A: Shell finish provides corrosion resistance and environmental protection. Yellow cadmium plating (DEM09PN, DEM09P) offers superior corrosion resistance in harsh environments. Nickel plating (171-009-103L series) provides good corrosion resistance with RoHS compliance. Tin plating (L777SDEH09PVF) offers RoHS-compliant corrosion protection. Selection depends on environmental exposure and regulatory requirements.

Q: Are all substitute parts certified to UL94 V-0? A: Yes. All parts listed—DEM09P, 171-009-103L001, 171-009-103L011, 171-009-103L021, and L777SDEH09PVF—maintain UL94 V-0 material flammability rating, matching the original DEM09PN specification.

Q: What operating temperature range should be verified for substitution? A: DEM09PN operates -55°C ~ 155°C. DEM09P operates -55°C ~ 125°C (30°C reduction at upper limit). NorComp 171-009-103L parts operate -50°C ~ 100°C (5°C reduction at lower limit, 55°C reduction at upper limit). L777SDEH09PVF operates -55°C ~ 125°C. Applications requiring full -55°C ~ 155°C range must use DEM09PN or verify that reduced ranges are acceptable.

Q: Are there inventory considerations for part selection? A: Current inventory levels are: DEM09P (1178 pcs), 171-009-103L001 (1274 pcs), 171-009-103L011 (1247 pcs), 171-009-103L021 (3571 pcs), and L777SDEH09PVF (949 pcs). 171-009-103L021 has the highest available inventory. Inventory status may change; verify current availability with supplier.