DEMF09SN D-Sub Receptacle Connector - Equivalent & Substitute Parts

Part Overview

The DEMF09SN is a 9-position D-Sub receptacle connector manufactured by Amphenol ICC (FCI) in the DM HE508 series. This connector features female sockets with solder cup termination and is designed for free-hanging, in-line applications. The part is currently active in production with 719 units in stock. Alternative equivalent parts may be required due to supply chain considerations, manufacturing discontinuation, or specific application requirements that align with the connector's core electrical and mechanical specifications.

Substiute Parts

DEMF09SN

Amphenol ICC (FCI)In Stock: 804DEMF09SN Datasheet

Current PartRFQ

3-1393483-8

TE Connectivity AMP ConnectorsIn Stock: 9763-1393483-8 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DEMF09SN is based on strict alignment of the following core parameters:

• Connector Style & Type: D-Sub receptacle with female sockets
• Position & Row Configuration: 9 positions in 2-row layout
• Shell Size & Layout: Size 1 (DE, E) designation
• Mounting Configuration: Free hanging, in-line orientation
• Termination Method: Solder cup
• Contact Type: Signal contacts
• Flange Feature: Unthreaded housing/shell

The substitute part 3-1393483-8 (TE Connectivity AMP Connectors, AMPLIMITE HD-20 series) meets all mandatory structural and functional parameters. Differences in shell finish material (tin plated vs. cadmium plated), contact finish thickness, current rating, operating temperature range, and RoHS compliance status are secondary variations that do not prevent functional equivalence in applications where these differences are acceptable.

Parameter Comparison

Engineering Selection Recommendations

The 3-1393483-8 substitute part is functionally equivalent to the DEMF09SN for applications where the following conditions are met:

• Current Requirements: Applications requiring 3A or less. The DEMF09SN supports 7.5A; the substitute supports 3A. Selection must account for actual circuit current demands.
• Temperature Operating Range: Applications operating within -55°C to 125°C. The DEMF09SN supports -55°C to 155°C; the substitute has a lower upper temperature limit.
• RoHS Compliance: The substitute part (3-1393483-8) is ROHS3 compliant, while the DEMF09SN is RoHS non-compliant. Applications subject to RoHS regulations must use the substitute.
• Shell Finish: The substitute uses tin plating instead of cadmium plating. Environmental and corrosion resistance characteristics differ between these finishes.
• Dielectric Material: The substitute uses PBT polyester material versus the thermoplastic glass-filled material of the original. Material properties including mechanical strength and thermal characteristics differ.

Both parts share identical mechanical compatibility (9-position, 2-row, size 1 DE/E layout, solder cup termination, unthreaded housing) and are suitable for direct physical replacement in connector footprints.

Frequently Asked Questions (FAQ)

Q: Can the 3-1393483-8 be used as a direct replacement for DEMF09SN in all applications?

A: Physical compatibility is confirmed. Electrical and environmental compatibility depends on application requirements. The substitute part has a lower current rating (3A vs. 7.5A) and reduced maximum operating temperature (125°C vs. 155°C). Verify that your application does not exceed these limits.

Q: What is the difference between cadmium plating and tin plating on the shell?

A: Both are corrosion-resistant finishes. Cadmium plating (DEMF09SN) provides superior corrosion resistance in harsh environments but is restricted in some jurisdictions. Tin plating (3-1393483-8) is environmentally compliant and suitable for standard industrial applications.

Q: Does the RoHS compliance difference affect compatibility?

A: RoHS compliance is a regulatory and supply chain consideration, not a functional one. If your application or region requires RoHS-compliant components, the 3-1393483-8 is the appropriate selection. The DEMF09SN is suitable for applications without RoHS requirements.

Q: Are the dielectric materials interchangeable?

A: Both materials are thermoplastic insulators suitable for signal-level D-Sub connectors. The thermoplastic glass-filled material (DEMF09SN) and PBT polyester (3-1393483-8) have different mechanical and thermal properties. For applications with specific material requirements, consult material datasheets.

Q: What is the packaging format for both parts?

A: Both the DEMF09SN and 3-1393483-8 are supplied in tray packaging. Inventory availability: DEMF09SN (719 units), 3-1393483-8 (898 units).

Q: Can I use the substitute in high-temperature applications above 125°C?

A: No. The 3-1393483-8 has a maximum operating temperature of 125°C. For applications requiring operation up to 155°C, the DEMF09SN is the appropriate selection.