DEM09P743M D-Sub 9-Position Right Angle Solder Plug Connector

Part Overview

The DEM09P743M is a 9-position D-Sub plug connector manufactured by Amphenol ICC (FCI) in the DM series. This through-hole, right-angle solder connector is designed for signal applications requiring robust mechanical and electrical performance in harsh environments. The connector features a steel shell with yellow cadmium plating, gold-plated contacts, and is rated for 7.5A per contact at 300V. With an active product status and 665 units in stock, this connector serves as a reference point for identifying functionally equivalent alternatives from other manufacturers.

Substitute parts are necessary when original manufacturer inventory is unavailable, when design requirements permit alternative contact materials or flange configurations, or when compliance certifications differ between procurement cycles.

Key Parameters

Parameter	DEM09P743M Value
Connector Type	Plug, Male Pins
Number of Positions	9
Shell Size, Connector Layout	1 (DE, E)
Mounting Type	Through Hole, Right Angle
Termination	Solder
Current Rating (Amps)	7.5A per Contact
Voltage Rating	300V
Operating Temperature	-55°C ~ 125°C
Material Flammability Rating	UL94 V-0
Contact Type	Signal

Substitute Part Grouping Explanation

Substitution eligibility for the DEM09P743M is determined by strict adherence to the following core parameters:

Critical Parameters (Must Match):

Connector Type: Plug, Male Pins
Number of Positions: 9
Shell Size, Connector Layout: 1 (DE, E)
Mounting Type: Through Hole, Right Angle
Termination: Solder
Contact Type: Signal
Operating Temperature Range: -55°C ~ 125°C
Material Flammability Rating: UL94 V-0

Allowable Variations:

Current Rating: 6.5A or 7.5A per contact (both acceptable for signal applications)
Backset Spacing: 0.318" (8.08mm) or 0.409" (10.40mm)
Shell Material Finish: Steel with or without specific plating designation
Contact Material: Brass or Copper Alloy
Contact Form: Stamped or Machined
Flange Feature: Housing/Shell with M3, 4-40, or Unthreaded configuration
Dielectric Material: Thermoplastic or Polybutylene Terephthalate (PBT) with glass fill
RoHS Status: RoHS non-compliant or ROHS3 Compliant

All nine substitute parts listed meet these criteria and are therefore electrically and mechanically compatible with the DEM09P743M for signal connector applications.

Parameter Comparison

Part Number	Manufacturer	Connector Type	Positions	Shell Layout	Mounting	Current Rating (A)	Operating Temp (°C)	Flammability	Contact Material	RoHS Status	Inventory (Pcs)
DEM09P743M	Amphenol ICC (FCI)	Plug, Male Pins	9	1 (DE, E)	Through Hole, Right Angle	7.5	-55 ~ 125	UL94 V-0	Brass	RoHS non-compliant	665
09651626815	HARTING	Plug, Male Pins	9	1 (DE, E)	Through Hole, Right Angle	6.5	-55 ~ 125	UL94 V-0	Copper Alloy	ROHS3 Compliant	829
09651626816	HARTING	Plug, Male Pins	9	1 (DE, E)	Through Hole, Right Angle	6.5	-55 ~ 125	UL94 V-0	Copper Alloy	ROHS3 Compliant	911
09651636812	HARTING	Plug, Male Pins	9	1 (DE, E)	Through Hole, Right Angle	6.5	-55 ~ 125	UL94 V-0	Copper Alloy	ROHS3 Compliant	926
09661226802	HARTING	Plug, Male Pins	9	1 (DE, E)	Through Hole, Right Angle	7.5	-55 ~ 125	UL94 V-0	Copper Alloy	ROHS3 Compliant	1088
09661626812	HARTING	Plug, Male Pins	9	1 (DE, E)	Through Hole, Right Angle	7.5	-55 ~ 125	UL94 V-0	Copper Alloy	ROHS3 Compliant	1069
09661627811	HARTING	Plug, Male Pins	9	1 (DE, E)	Through Hole, Right Angle	7.5	-55 ~ 125	UL94 V-0	Copper Alloy	ROHS3 Compliant	907
09661627812	HARTING	Plug, Male Pins	9	1 (DE, E)	Through Hole, Right Angle	7.5	-55 ~ 125	UL94 V-0	Copper Alloy	ROHS3 Compliant	837
09661637812	HARTING	Plug, Male Pins	9	1 (DE, E)	Through Hole, Right Angle	7.5	-55 ~ 125	UL94 V-0	Copper Alloy	ROHS3 Compliant	1038
1218440-1	TE Connectivity Aerospace, Defense and Marine	Plug, Male Pins	9	1 (DE, E)	Through Hole, Right Angle	5.0	-55 ~ 125	Not specified	Brass	RoHS non-compliant	704

Engineering Selection Recommendations

For RoHS3 Compliant Applications: HARTING parts 09651626815, 09651626816, 09651636812, 09661226802, 09661626812, 09661627811, 09661627812, and 09661637812 are all ROHS3 Compliant and suitable for designs requiring RoHS compliance. These parts maintain the same connector geometry, operating temperature range, and flammability rating as the DEM09P743M.

For Current Rating Equivalence: Parts 09661226802, 09661626812, 09661627811, 09661627812, and 09661637812 maintain the 7.5A per contact rating of the original DEM09P743M. Parts 09651626815, 09651626816, and 09651636812 are rated at 6.5A per contact and are suitable for applications where this lower current capacity is acceptable.

For Non-Compliant or Military Applications: Part 1218440-1 from TE Connectivity is RoHS non-compliant and conforms to MIL-DTL-24308 military specifications. This part is suitable for aerospace, defense, and marine applications where military qualification is required. The 5.0A per contact rating is lower than the original part and must be evaluated against circuit requirements.

For Inventory Availability: All substitute parts maintain active product status with inventory levels ranging from 704 to 1088 units, providing multiple sourcing options.

Frequently Asked Questions (FAQ)

Q: Can HARTING parts with 6.5A rating replace the DEM09P743M rated at 7.5A? A: Yes, for applications where the circuit current per contact does not exceed 6.5A. The 6.5A rating is a lower specification within the allowable range for this connector category. Circuit design must confirm that actual current draw per contact remains within the substitute part's rating.

Q: What is the difference between the various HARTING part numbers? A: The HARTING substitutes differ in flange feature configuration (M3 vs. 4-40 threaded holes), contact form (Stamped vs. Machined), packaging type (Bulk vs. Tray vs. Bag), and backset spacing. All maintain the same 9-position, right-angle solder configuration and are electrically equivalent for signal applications.

Q: Is the TE Connectivity 1218440-1 a direct replacement? A: The 1218440-1 is mechanically and electrically compatible but has a lower current rating of 5.0A per contact compared to the DEM09P743M's 7.5A. It is suitable only for applications where circuit current per contact does not exceed 5.0A. This part is qualified to military standard MIL-DTL-24308 and is intended for aerospace, defense, and marine applications.

Q: Does RoHS compliance affect electrical performance? A: No. RoHS3 Compliant HARTING parts maintain identical electrical characteristics, operating temperature range, and flammability rating as the original DEM09P743M. RoHS compliance relates to material composition and environmental impact, not electrical function.

Q: What is the significance of backset spacing differences? A: Backset spacing (0.318" vs. 0.409") defines the distance from the connector mounting surface to the contact plane. This affects PCB layout and mating connector positioning. Verify that the substitute part's backset spacing is compatible with the mating connector and PCB design before selection.

Q: Can these connectors be used interchangeably in the same assembly? A: Yes, provided that the flange feature (M3, 4-40, or Unthreaded) matches the mounting holes in the assembly, the backset spacing is compatible with the mating connector, and the current rating meets circuit requirements. Mechanical fit must be confirmed before assembly.

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