DEML09SN D-Sub 9 Position Receptacle Connector Equivalent & Substitute Parts

Part Overview

The DEML09SN is a 9 position D-Sub receptacle connector manufactured by Amphenol ICC (FCI) in the DM HE508 series. This free hanging, in-line connector features female sockets with solder cup termination, steel shell with yellow cadmium plating, and gold-plated contacts. The part is currently active in production with 973 units in stock.

Equivalent and substitute parts are necessary when the DEML09SN reaches end-of-life status, when supply constraints occur, or when design requirements permit alternative mounting configurations or material specifications. Several NorComp Inc. alternatives provide functional equivalence with modified mounting types and shell finishes.

Substiute Parts

DEML09SN

Amphenol ICC (FCI)In Stock: 991DEML09SN Datasheet

Current PartRFQ

171-009-202L001

NorComp Inc.In Stock: 3472171-009-202L001 Datasheet

MFR RecommendedRFQ

171-009-203L011

NorComp Inc.In Stock: 1747171-009-203L011 Datasheet

MFR RecommendedRFQ

171-009-203L021

NorComp Inc.In Stock: 1709171-009-203L021 Datasheet

MFR RecommendedRFQ

171-009-203L031

NorComp Inc.In Stock: 2310171-009-203L031 Datasheet

MFR RecommendedRFQ

172-009-202R011

NorComp Inc.In Stock: 1119172-009-202R011 Datasheet

MFR RecommendedRFQ

172-009-202R021

NorComp Inc.In Stock: 1082172-009-202R021 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DEML09SN is determined by the following critical parameters that must remain constant across equivalent parts:

• Connector type: Receptacle, Female Sockets
• Number of positions: 9
• Number of rows: 2
• Shell size and connector layout: 1 (DE, E)
• Termination method: Solder Cup
• Contact finish: Gold
• Material flammability rating: UL94 V-0

The substitute parts identified are NorComp Inc. models from the 171 and 172 series. These parts maintain the core electrical and mechanical interface specifications. However, substitutes differ in the following parameters:

• Mounting type: Panel Mount (versus free hanging in-line)
• Shell material finish: Nickel or Tin Plated (versus yellow cadmium plated)
• Current rating: 5A per contact (versus 7.5A)
• Operating temperature range: -50°C ~ 100°C (versus -55°C ~ 155°C)
• Contact form: Stamped or Machined
• RoHS compliance status: ROHS3 Compliant (versus non-compliant)

These differences require engineering evaluation based on specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The DEML09SN is currently active in production. Selection of substitute parts depends on application-specific requirements and design constraints.

For applications requiring free hanging, in-line mounting configuration, the DEML09SN remains the primary choice. No active substitute maintains this mounting type while preserving all other specifications.

For applications that can accommodate panel mount configuration, the NorComp 171 series provides active alternatives:

171-009-203L011 and 171-009-203L021 are both active products with ROHS3 compliance. These parts differ only in flange feature specification (cable side 4-40 versus cable side 4-40). Both feature nickel-plated steel shells and glass-filled PBT dielectric material.

171-009-203L031 is an active product with mating side flange (4-40) and identical electrical and material specifications to 171-009-203L011 and 171-009-203L021.

171-009-202L001 is obsolete and not recommended for new designs despite ROHS3 compliance.

172-009-202R011 and 172-009-202R021 are obsolete NorComp products and not recommended for new designs.

Applications requiring the extended operating temperature range (-55°C ~ 155°C) or higher current rating (7.5A per contact) of the DEML09SN cannot be satisfied by the identified substitutes, which are limited to -50°C ~ 100°C and 5A per contact.

Frequently Asked Questions (FAQ)

Q: Can the NorComp 171 series parts directly replace the DEML09SN in existing designs?

A: Direct replacement is not possible without design modification. The DEML09SN is a free hanging, in-line connector, while all identified NorComp substitutes are panel mount. The connector interface (9 positions, 2 rows, DE/E shell size) and termination method (solder cup) are compatible, but the mounting configuration differs fundamentally.

Q: What are the electrical differences between the DEML09SN and substitute parts?

A: The DEML09SN supports 7.5A per contact and 300V rating with operating temperature range -55°C ~ 155°C. NorComp substitutes are rated for 5A per contact with operating temperature range -50°C ~ 100°C. Voltage rating is not specified for substitute parts. Applications requiring the higher current or extended temperature range cannot use these substitutes.

Q: Are the NorComp 171 series parts RoHS compliant?

A: Yes, all active NorComp 171 series parts (171-009-203L011, 171-009-203L021, 171-009-203L031) are ROHS3 compliant. The DEML09SN is RoHS non-compliant. This difference may be significant for applications subject to RoHS regulations.

Q: What is the difference between the flange features on the NorComp 171 parts?

A: 171-009-203L011 and 171-009-203L021 feature cable side flange (4-40). 171-009-203L031 features mating side flange (4-40). The flange location determines where the mounting hardware is positioned relative to the connector body. Selection depends on the specific panel or housing design.

Q: Why are some substitute parts listed as obsolete?

A: 171-009-202L001, 172-009-202R011, and 172-009-202R021 are obsolete products. Obsolete parts may have limited availability and are not recommended for new designs. Active alternatives should be prioritized: 171-009-203L011, 171-009-203L021, and 171-009-203L031.

Q: What is the difference between machined and stamped contact forms?

A: The DEML09SN uses machined contacts, as do the obsolete NorComp 172 series parts. Active NorComp 171 series parts use stamped contacts. Contact form affects manufacturing process and cost but does not change the electrical interface or compatibility with mating connectors.

Q: Can I use a substitute part if my application requires the -55°C lower temperature limit?

A: No. The DEML09SN operates to -55°C, while all identified substitutes operate only to -50°C. Applications requiring operation below -50°C must continue using the DEML09SN or identify alternative connector families.