TE Connectivity 749769-3 D-Sub HD 26-Position Plug Connector Equivalent & Substitute Parts

Part Overview

The TE Connectivity AMP Connectors 749769-3 is a 26-position D-Sub high-density plug connector with right-angle solder termination, designed for through-hole mounting applications. This connector features male pins, nickel-plated steel shell, and gold-plated brass contacts rated for 2A at 125V operation across a temperature range of -55°C to 105°C.

The 749769-3 carries an obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design compatibility, ensure continued component availability, and support legacy system maintenance and repairs.

Key Parameters

Parameter	Specification
Connector Type	D-Sub, High Density Plug, Male Pins
Number of Positions	26
Number of Rows	3
Shell Size / Layout	2 (DA, A) High Density
Mounting Type	Through Hole, Right Angle
Termination Method	Solder
Shell Material / Finish	Steel, Nickel Plated
Contact Material	Brass
Contact Finish	Gold
Current Rating	2A
Voltage Rating	125V
Operating Temperature	-55°C to 105°C
Backset Spacing	0.350" (8.89mm)
Flammability Rating	UL94 V-0
Dielectric Material	Polybutylene Terephthalate (PBT), Polyester, Glass Filled
Features	Board Lock, Grounding Indents

Substitute Part Grouping Explanation

Substitute parts for the 749769-3 are identified based on strict electrical and mechanical parameter alignment. The following criteria determine substitution eligibility:

Core Matching Parameters:

Connector type: D-Sub, High Density Plug, Male Pins
Position count: 26 positions
Row configuration: 3 rows
Shell size and layout: 2 (DA, A) High Density
Mounting orientation: Right Angle
Termination method: Solder
Backset spacing: 0.350" (8.89mm)
Flammability rating: UL94 V-0
Operating temperature range: -55°C to 105°C minimum

Allowable Parameter Variations:

Current rating: Substitute parts rated at 2.5A or 3A per contact exceed the 2A requirement and are acceptable
Voltage rating: Substitute parts rated at 250V exceed the 125V requirement and are acceptable
Shell finish: Nickel plating or tin plating are both acceptable
Contact finish thickness: Flash or 30.0µin (0.76µm) are both acceptable
Flange feature configuration: Housing/Shell, Board Side, or Mating Side variations are acceptable provided mounting compatibility is maintained
Dielectric material: Thermoplastic or Polyester variants are acceptable
Contact material: Brass or Copper Alloy are both acceptable

Substitute parts are grouped by manufacturer and specific flange feature configuration to support design-specific mounting requirements.

Parameter Comparison

Parameter	749769-3 (Main)	10090926-P266VLF	10090926-P266XLF	633-026-263-032	L717HDA26PD1CH3F	L717HDA26PD1CH3R
Manufacturer	TE Connectivity AMP	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Mercury United Electronics	Amphenol ICC (Commercial)	Amphenol ICC (Commercial)
Connector Type	D-Sub HD Plug, Male Pins	D-Sub HD Plug, Male Pins	D-Sub HD Plug, Male Pins	D-Sub HD Plug, Male Pins	D-Sub HD Plug, Male Pins	D-Sub HD Plug, Male Pins
Positions	26	26	26	26	26	26
Rows	3	3	3	3	3	3
Shell Size / Layout	2 (DA, A) HD	2 (DA, A) HD	2 (DA, A) HD	2 (DA, A) HD	2 (DA, A) HD	2 (DA, A) HD
Mounting Type	Through Hole, Right Angle	Board Edge, Through Hole, Right Angle	Board Edge, Through Hole, Right Angle	Board Edge, Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle
Termination	Solder	Solder	Solder	Solder	Solder	Solder
Shell Material / Finish	Steel, Nickel Plated	Steel, Nickel Plated	Steel, Nickel Plated	Steel, Nickel Plated	Steel, Tin Plated	Steel, Tin Plated
Contact Material	Brass	Copper Alloy	Copper Alloy	Copper Alloy	Brass	Brass
Contact Finish	Gold	Gold	Gold	Gold	Gold	Gold
Current Rating	2A	2.5A per Contact	2.5A per Contact	3A per Contact	3A	3A
Voltage Rating	125V	250V	250V	Not Specified	250V	250V
Operating Temperature	-55°C to 105°C	-55°C to 105°C	-55°C to 105°C	-55°C to 85°C	-55°C to 105°C	-55°C to 105°C
Backset Spacing	0.350" (8.89mm)	0.350" (8.89mm)	0.350" (8.89mm)	0.350" (8.89mm)	0.350" (8.89mm)	0.350" (8.89mm)
Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
Flange Feature	Housing/Shell (4-40)	Mating Side, Female Screwlock (4-40)	Board Side (4-40)	Housing/Shell (4-40)	Mating Side, Female Screwlock (M3)	Board Side (M3)
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	Non-compliant	Compliant	Compliant	ROHS3 Compliant	Compliant	Compliant

Engineering Selection Recommendations

Active Product Availability: All identified substitute parts carry active product status, ensuring continued availability and supply chain support. The main part 749769-3 is obsolete and should be replaced with an active equivalent for new designs and ongoing production support.

Regulatory Compliance: Substitute parts 10090926-P266VLF, 10090926-P266XLF, L717HDA26PD1CH3F, and L717HDA26PD1CH3R are RoHS Compliant. Part 633-026-263-032 is ROHS3 Compliant. These certifications exceed the non-compliant status of the main part and support modern regulatory requirements.

Flange Feature Selection:

Housing/Shell Flange (4-40): 633-026-263-032 matches the main part's flange configuration and is suitable for direct mechanical replacement where shell-mounted fastening is required.
Board Side Flange (4-40): 10090926-P266XLF provides board-side mounting with 4-40 fasteners, compatible with designs requiring board-mounted retention.
Mating Side Flange (4-40): 10090926-P266VLF provides mating-side screwlock with 4-40 fasteners for connector-mounted retention.
Board Side Flange (M3): L717HDA26PD1CH3R provides board-side mounting with M3 fasteners for metric-based designs.
Mating Side Flange (M3): L717HDA26PD1CH3F provides mating-side screwlock with M3 fasteners for metric-based designs.

Shell Finish Considerations: Nickel-plated variants (10090926-P266VLF, 10090926-P266XLF, 633-026-263-032) match the main part's finish. Tin-plated variants (L717HDA26PD1CH3F, L717HDA26PD1CH3R) provide alternative corrosion resistance suitable for different environmental conditions.

Temperature Range: Part 633-026-263-032 operates to 85°C maximum, which is below the main part's 105°C upper limit. This part is suitable only for applications not exceeding 85°C. All other substitutes support the full -55°C to 105°C range.

Current and Voltage Ratings: All substitute parts exceed the main part's electrical ratings (2A at 125V), providing design margin and supporting higher-power applications without derating.

Frequently Asked Questions (FAQ)

Q: Can I use part 633-026-263-032 as a direct replacement for 749769-3 in all applications?

A: Part 633-026-263-032 is mechanically and electrically compatible for applications operating at or below 85°C. If your application requires operation above 85°C up to 105°C, use L717HDA26PD1CH3F, L717HDA26PD1CH3R, 10090926-P266VLF, or 10090926-P266XLF instead.

Q: What is the difference between the flange feature options?

A: Flange features determine mounting location and fastener type. Housing/Shell flange (749769-3, 633-026-263-032) mounts fasteners on the connector shell. Board Side flange (10090926-P266XLF, L717HDA26PD1CH3R) mounts fasteners on the PCB. Mating Side flange (10090926-P266VLF, L717HDA26PD1CH3F) mounts fasteners on the mating connector. Select based on your mechanical design requirements.

Q: Are the Amphenol ICC (FCI) parts 10090926-P266VLF and 10090926-P266XLF interchangeable?

A: Both parts are electrically and mechanically compatible 26-position D-Sub HD plugs with identical electrical ratings. The difference is flange configuration: 10090926-P266VLF has mating-side screwlock, while 10090926-P266XLF has board-side flange. Select based on your mounting design.

Q: What is the difference between L717HDA26PD1CH3F and L717HDA26PD1CH3R?

A: Both are Amphenol ICC Commercial Products with identical electrical specifications. L717HDA26PD1CH3F has mating-side female screwlock (M3), while L717HDA26PD1CH3R has board-side flange (M3). Select based on your fastening location requirement.

Q: Why do some substitutes have higher current ratings than the main part?

A: Substitute parts rated at 2.5A or 3A per contact exceed the main part's 2A rating. These higher ratings provide design margin and support applications requiring greater current capacity without component derating. They are fully compatible with 2A applications.

Q: Is the tin-plated finish of L717HDA26PD1CH3F and L717HDA26PD1CH3R equivalent to the nickel-plated finish of 749769-3?

A: Both finishes provide corrosion protection and are acceptable for D-Sub connectors. Nickel plating offers superior corrosion resistance in harsh environments, while tin plating provides good performance in standard industrial conditions. Select based on your environmental requirements.

Q: Can I use part 633-026-263-032 in applications requiring operation above 85°C?

A: No. Part 633-026-263-032 is rated for -55°C to 85°C maximum. For applications requiring operation up to 105°C, use 749769-3 substitutes with full temperature range: L717HDA26PD1CH3F, L717HDA26PD1CH3R, 10090926-P266VLF, or 10090926-P266XLF.

Q: Are all substitute parts RoHS compliant?

A: Yes. All identified substitute parts are RoHS Compliant or ROHS3 Compliant. The main part 749769-3 is RoHS non-compliant. Substitutes support modern regulatory requirements for new designs and production.

Q: What packaging is available for these substitute parts?

A: Amphenol ICC (FCI) parts 10090926-P266VLF and 10090926-P266XLF are supplied in Tray packaging. Amphenol ICC Commercial Products L717HDA26PD1CH3F and L717HDA26PD1CH3R are supplied in Tray packaging. Mercury United Electronics 633-026-263-032 is supplied in Tray packaging. Confirm packaging requirements with your procurement process.

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