DEM09S300N D-Sub 9 Position Receptacle Equivalent & Substitute Parts

Part Overview

The DEM09S300N is a 9 position D-Sub receptacle connector manufactured by Amphenol ICC (FCI) with female sockets, designed for through-hole solder termination. This connector features a DE/E shell size (1) with unthreaded housing and gold-plated contacts rated for 7.5A per contact at 300V. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs requiring compatible D-Sub receptacle functionality.

Key Parameters

Parameter	DEM09S300N Value
Connector Type	Receptacle, Female Sockets
Number of Positions	9
Shell Size, Connector Layout	1 (DE, E)
Mounting Type	Through Hole
Termination	Solder
Shell Material, Finish	Steel, Yellow Cadmium Plated
Contact Finish	Gold
Current Rating	7.5A per Contact
Voltage Rating	300V
Operating Temperature	-55°C ~ 155°C
Material Flammability Rating	UL94 V-0
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the DEM09S300N is determined by strict alignment of the following critical parameters:

Core Compatibility Parameters:

Connector type: Receptacle, Female Sockets
Number of positions: 9
Shell size and layout: 1 (DE, E)
Mounting type: Through Hole
Termination method: Solder
Material flammability rating: UL94 V-0

Electrical Performance Parameters:

Current rating: Minimum 6.5A per contact (DEM09S300N rated 7.5A)
Voltage rating: Minimum 300V (substitute parts with unspecified voltage rating are acceptable if other parameters align)
Operating temperature range: Minimum -55°C ~ 125°C (DEM09S300N rated to 155°C)

Mechanical Compatibility Parameters:

Flange feature: Housing/Shell configuration (Unthreaded, M3, or 4-40 threaded variants)
Contact form: Machined or Stamped
Dielectric material: Thermoplastic or glass-filled polyester/polycyclohexylenedimethylene terephthalate

Substitute parts from Amphenol ICC (FCI) and HARTING meet these criteria with variations in flange design, contact material composition, and regulatory compliance status.

Parameter Comparison

Part Number	Manufacturer	Connector Type	Positions	Shell Size	Mounting	Termination	Current Rating (A)	Voltage Rating (V)	Operating Temp (°C)	Flange Feature	Contact Material	RoHS Status	Product Status
DEM09S300N	Amphenol ICC (FCI)	Receptacle, Female Sockets	9	1 (DE, E)	Through Hole	Solder	7.5	300	-55 ~ 155	Unthreaded	Brass	Non-compliant	Obsolete
DEM09S300	Amphenol ICC (FCI)	Receptacle, Female Sockets	9	1 (DE, E)	Through Hole	Solder	7.5	300	-55 ~ 125	Unthreaded	Phosphor Bronze	Non-compliant	Active
09661156501	HARTING	Receptacle, Female Sockets	9	1 (DE, E)	Through Hole	Solder	6.5	—	-55 ~ 125	M3	Copper Alloy	ROHS3 Compliant	Active
09661156502	HARTING	Receptacle, Female Sockets	9	1 (DE, E)	Through Hole	Solder	6.5	—	-55 ~ 125	4-40	Copper Alloy	ROHS3 Compliant	Obsolete
09661157501	HARTING	Receptacle, Female Sockets	9	1 (DE, E)	Through Hole	Solder	6.5	—	-55 ~ 125	M3	Copper Alloy	ROHS3 Compliant	Active
09661157502	HARTING	Receptacle, Female Sockets	9	1 (DE, E)	Through Hole	Solder	6.5	—	-55 ~ 125	4-40	Copper Alloy	ROHS3 Compliant	Active
09661556511	HARTING	Receptacle, Female Sockets	9	1 (DE, E)	Through Hole	Solder	6.5	—	-55 ~ 125	M3	Copper Alloy	ROHS3 Compliant	Active
09661556512	HARTING	Receptacle, Female Sockets	9	1 (DE, E)	Through Hole	Solder	6.5	—	-55 ~ 125	4-40	Copper Alloy	ROHS3 Compliant	Active
09661557511	HARTING	Receptacle, Female Sockets	9	1 (DE, E)	Through Hole	Solder	6.5	—	-55 ~ 125	M3	Copper Alloy	ROHS3 Compliant	Active
09661557512	HARTING	Receptacle, Female Sockets	9	1 (DE, E)	Through Hole	Solder	6.5	—	-55 ~ 125	4-40	Copper Alloy	ROHS3 Compliant	Active
09670094754	HARTING	Receptacle, Female Sockets	9	1 (DE, E)	Through Hole	Solder	7.5	—	-55 ~ 125	Unthreaded	—	ROHS3 Compliant	Active

Engineering Selection Recommendations

Primary Substitute (Amphenol ICC FCI): DEM09S300 is the direct manufacturer equivalent from Amphenol ICC (FCI). It maintains the same electrical specifications (7.5A, 300V), shell configuration, and solder termination. The operating temperature range is reduced to -55°C ~ 125°C, and contact material differs (Phosphor Bronze vs. Brass). This part remains non-compliant with RoHS but is currently active in production.

Active Substitutes with RoHS3 Compliance (HARTING): HARTING 09661156501, 09661157501, 09661556511, and 09661557511 are active production parts with ROHS3 compliance. These parts feature M3 threaded flanges and maintain 6.5A current rating with -55°C ~ 125°C operating range. The 09661156502, 09661157502, 09661556512, and 09661557512 variants provide 4-40 threaded flange options with identical electrical and thermal specifications.

High Current Alternative: HARTING 09670094754 provides 7.5A current rating matching the original DEM09S300N, with unthreaded flange configuration and ROHS3 compliance. Operating temperature is -55°C ~ 125°C. Contact material and voltage rating are not specified.

Flange Configuration Selection:

Unthreaded flange: DEM09S300, 09670094754
M3 threaded flange: 09661156501, 09661157501, 09661556511, 09661557511
4-40 threaded flange: 09661156502, 09661157502, 09661556512, 09661557512

Board Lock Feature: HARTING parts 09661556511, 09661556512, 09661557511, and 09661557512 include board lock feature for enhanced mechanical retention.

Frequently Asked Questions (FAQ)

Q: Can HARTING parts with 6.5A rating replace the DEM09S300N rated for 7.5A? A: HARTING substitutes with 6.5A rating are electrically compatible for applications requiring up to 6.5A per contact. Applications requiring the full 7.5A rating must use DEM09S300 or 09670094754.

Q: What is the difference between M3 and 4-40 flange variants? A: Flange configuration determines the mounting method. M3 variants use metric threaded mounting, while 4-40 variants use imperial threaded mounting. Unthreaded variants provide friction-fit mounting. Selection depends on PCB design and mechanical assembly requirements.

Q: Are HARTING parts with unspecified voltage rating compatible with 300V applications? A: HARTING parts do not specify voltage rating in the provided data. Compatibility for 300V applications must be confirmed through HARTING technical documentation before selection.

Q: What is the significance of board lock feature in HARTING parts? A: Board lock feature provides mechanical retention to prevent connector separation during handling and operation. Parts 09661556511, 09661556512, 09661557511, and 09661557512 include this feature; other variants do not.

Q: Does RoHS3 compliance affect electrical performance? A: RoHS3 compliance addresses material composition and environmental restrictions but does not alter electrical performance. ROHS3 compliant HARTING parts maintain the same current, voltage, and temperature specifications as non-compliant alternatives.

Q: What packaging options are available? A: DEM09S300 is supplied in Tray packaging. HARTING parts are supplied in Bulk or Tray packaging depending on part number. Packaging selection affects order quantity and handling requirements.

Q: Can contact material differences (Brass vs. Phosphor Bronze vs. Copper Alloy) affect compatibility? A: Contact material affects durability and mating cycle performance but does not prevent electrical or mechanical compatibility. All materials specified meet UL94 V-0 flammability requirements and gold plating specifications.

Q: What is the operating temperature limitation for substitutes? A: DEM09S300N operates to 155°C. All substitute parts operate to maximum 125°C. Applications requiring operation above 125°C cannot use these substitutes.

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