TE Connectivity 745781-3 D-Sub 9-Position Receptacle Equivalent & Substitute Parts

Part Overview

The TE Connectivity 745781-3 is a 9-position D-Sub receptacle connector with right-angle solder termination, designed for through-hole mounting applications. This connector features female sockets, gold-plated phosphor bronze contacts, and a tin-plated steel shell rated for 6A at 125V across an operating temperature range of -55°C to 105°C. The part is classified as obsolete, necessitating identification of active equivalent and substitute components that maintain electrical and mechanical compatibility for new designs or replacement applications.

Key Parameters

Parameter	Value
Connector Style	D-Sub
Connector Type	Receptacle, Female Sockets
Number of Positions	9
Number of Rows	2
Shell Size, Connector Layout	1 (DE, E)
Mounting Type	Through Hole, Right Angle
Termination	Solder
Current Rating (Amps)	6A
Voltage Rating	125V
Operating Temperature	-55°C ~ 105°C
Backset Spacing	0.318" (8.08mm)
Material Flammability Rating	UL94 V-0

Substitute Part Grouping Explanation

Substitution of the TE Connectivity 745781-3 is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Connector style (D-Sub), type (receptacle, female sockets), and position count (9 positions, 2 rows)
Shell size and layout (1 / DE, E)
Mounting configuration (through hole, right angle orientation)
Termination method (solder)
Backset spacing (0.318" / 8.08mm)
Current rating minimum (6A or equivalent)
Voltage rating minimum (125V or equivalent)
Operating temperature range encompassing -55°C to 105°C
Material flammability compliance (UL94 V-0)

Secondary Compatibility Factors:

Contact finish (gold plating acceptable)
Shell material and finish (steel with tin or nickel plating)
Dielectric material (thermoplastic or polyamide acceptable)
Flange feature configuration (housing/shell mounting)

Parts that deviate from primary criteria in backset spacing, current rating, operating temperature range, or shell size are classified as similar but not direct substitutes and require design verification before implementation.

Parameter Comparison

Parameter	745781-3 (Main)	5745781-3	745781-4	622-009-260-012	174-E09-213R001	174-E09-213R141	182-009-213R531	6E17C009SBF120	6E17C009SBF220	6E17Y009SAJ220	D09S23B6PA00LF
Manufacturer	TE Connectivity	TE Connectivity	TE Connectivity	Mercury United Electronics	NorComp Inc.	NorComp Inc.	NorComp Inc.	Amphenol ICC	Amphenol ICC	Amphenol ICC	Amphenol ICC (FCI)
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
Connector Type	Receptacle, Female Sockets	Receptacle, Female Sockets	Receptacle, Female Sockets	Receptacle, Female Sockets	Receptacle, Female Sockets	Receptacle, Female Sockets	Receptacle, Female Sockets	Receptacle, Female Sockets	Receptacle, Female Sockets	Receptacle, Female Sockets	Receptacle, Female Sockets
Number of Positions	9	9	9	9	9	9	9	9	9	9	9
Number of Rows	2	2	2	2	2	2	2	2	2	2	2
Shell Size, Connector Layout	1 (DE, E)	1 (DE, E)	1 (DE, E)	1 (DE, E)	1 (DE, E)	1 (DE, E)	1 (DE, E)	1 (DE, E)	1 (DE, E)	1 (DE, E)	1 (DE, E)
Mounting Type	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Board Edge, Through Hole, Right Angle	Panel Mount, Through Hole, Right Angle	Panel Mount, Through Hole, Right Angle	Panel Mount, Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle
Termination	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder
Current Rating (Amps)	6A	6A	6A	3A per Contact	5A	5A	5A	5A	5A	5A	5A
Voltage Rating	125V	125V	125V	—	—	—	—	—	—	—	300V
Backset Spacing	0.318" (8.08mm)	0.318" (8.08mm)	0.318" (8.08mm)	0.318" (8.08mm)	0.370" (9.40mm)	0.370" (9.40mm)	0.318" (8.08mm)	0.318" (8.08mm)	0.318" (8.08mm)	0.590" (14.99mm)	0.409" (10.40mm)
Operating Temperature	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 85°C	-50°C ~ 100°C	-50°C ~ 100°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 125°C
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
Shell Material, Finish	Steel, Tin Plated	Steel, Tin Plated	Steel, Tin Plated	Steel, Nickel Plated	Steel, Nickel Plated	Steel, Nickel Plated	Steel, Nickel Plated	Steel, Nickel Plated	Steel, Nickel Plated	Steel, Nickel Plated	Steel, Tin Plated
Contact Finish	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold or Gold, GXT™
RoHS Status	RoHS non-compliant	RoHS Compliant	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant

Engineering Selection Recommendations

Direct Substitutes (Electrical and Mechanical Equivalence):

The following parts maintain full compatibility with the TE Connectivity 745781-3 across all primary substitution criteria:

5745781-3 (TE Connectivity): Active status, RoHS compliant, identical electrical specifications, same backset spacing (0.318"), matching current and voltage ratings. Recommended for direct replacement in new designs requiring RoHS compliance.
745781-4 (TE Connectivity): Active status, same series (AMPLIMITE HD-20), identical backset spacing and electrical ratings. RoHS non-compliant status matches original part classification.
6E17C009SBF220 (Amphenol ICC): Active status, RoHS compliant, matching backset spacing (0.318"), equivalent current rating (5A minimum), operating temperature range (-55°C to 105°C). Features board lock and female screwlock flange configuration.
182-009-213R531 (NorComp Inc.): Active status, ROHS3 compliant, matching backset spacing (0.318"), equivalent current rating (5A), operating temperature range (-55°C to 105°C). Features board lock and housing/shell flange.

Conditional Substitutes (Design Verification Required):

The following parts meet most primary criteria but deviate in specific parameters:

622-009-260-012 (Mercury United Electronics): Matching backset spacing (0.318"), but current rating limited to 3A per contact (below 6A requirement) and operating temperature maximum of 85°C (below 105°C requirement). Suitable only for applications with reduced current and temperature specifications.
174-E09-213R001 and 174-E09-213R141 (NorComp Inc.): Backset spacing of 0.370" (9.40mm) deviates from 0.318" specification. Operating temperature range (-50°C to 100°C) does not encompass full -55°C to 105°C requirement. Current rating of 5A is below 6A specification. Panel mount configuration differs from through-hole primary mounting.
6E17Y009SAJ220 (Amphenol ICC): Backset spacing of 0.590" (14.99mm) significantly deviates from 0.318" specification. Not suitable for direct replacement without mechanical redesign.
D09S23B6PA00LF (Amphenol ICC): Backset spacing of 0.409" (10.40mm) deviates from 0.318" specification. Current rating of 5A is below 6A requirement. Voltage rating of 300V exceeds requirement. Operating temperature range extends to 125°C, exceeding original specification.
6E17C009SBF120 (Amphenol ICC): Backset spacing matches (0.318"), but current rating of 5A is below 6A requirement. Operating temperature range matches (-55°C to 105°C). RoHS compliant.

Compliance Considerations:

Parts designated as RoHS compliant (5745781-3, 6E17C009SBF220, 6E17C009SBF120, 6E17Y009SAJ220, 182-009-213R531, 174-E09-213R001, 174-E09-213R141, 622-009-260-012, D09S23B6PA00LF) are suitable for applications requiring environmental compliance. The original 745781-3 is RoHS non-compliant; substitution with compliant alternatives is necessary for new designs subject to RoHS directives.

Frequently Asked Questions (FAQ)

Q: Can the 5745781-3 be used as a direct replacement for the 745781-3?

A: Yes. The 5745781-3 maintains identical electrical specifications (6A at 125V), operating temperature range (-55°C to 105°C), backset spacing (0.318"), and mechanical configuration. The primary difference is active product status and RoHS compliance, making it suitable for direct substitution in new designs.

Q: What is the significance of backset spacing in D-Sub connector substitution?

A: Backset spacing defines the distance from the connector mounting face to the contact centerline. The 745781-3 specifies 0.318" (8.08mm). Substitutes with different backset spacing (such as 0.370", 0.409", or 0.590") require mechanical redesign of the mating connector and PCB layout. Parts with matching backset spacing are mechanically interchangeable without design modification.

Q: Why is the 622-009-260-012 not recommended as a direct substitute despite matching backset spacing?

A: Although the 622-009-260-012 matches backset spacing (0.318"), it has a current rating of 3A per contact, which is below the 745781-3 specification of 6A. Additionally, its operating temperature maximum of 85°C does not encompass the full -55°C to 105°C range required. Substitution is only valid for applications with reduced electrical and thermal requirements.

Q: Are NorComp 174-E09 series connectors suitable replacements?

A: The 174-E09-213R001 and 174-E09-213R141 are not direct substitutes. Both feature backset spacing of 0.370" (9.40mm), which differs from the 0.318" specification. Additionally, the operating temperature range (-50°C to 100°C) does not fully encompass the -55°C to 105°C requirement, and the current rating of 5A is below the 6A specification. These parts require design verification and mechanical redesign before implementation.

Q: What is the difference between the 6E17C009SBF220 and 6E17Y009SAJ220?

A: Both are Amphenol ICC 6E17 series connectors with RoHS compliance and matching operating temperature ranges. The primary difference is backset spacing: 6E17C009SBF220 has 0.318" (8.08mm) spacing, matching the 745781-3, while 6E17Y009SAJ220 has 0.590" (14.99mm) spacing. Only the 6E17C009SBF220 is mechanically interchangeable without redesign.

Q: Does the D09S23B6PA00LF offer any advantages over the 745781-3?

A: The D09S23B6PA00LF features a higher voltage rating (300V versus 125V) and extended operating temperature range (-55°C to 125°C). However, its backset spacing of 0.409" (10.40mm) deviates from the 0.318" specification, and its current rating of 5A is below the 6A requirement. These deviations necessitate design verification and potential mechanical modification.

Q: What packaging options are available for substitute parts?

A: The 745781-3 original part does not specify packaging. Substitute parts are available in multiple packaging configurations: tray (5745781-3, 745781-4, 622-009-260-012, NorComp series, 6E17C009SBF220, D09S23B6PA00LF), box (6E17C009SBF120), and unspecified (6E17Y009SAJ220). Packaging selection does not affect electrical or mechanical compatibility.

Q: Are all substitute parts certified to UL94 V-0 flammability standards?

A: Yes. All substitute parts listed in this reference maintain UL94 V-0 material flammability rating, matching the original 745781-3 specification. This certification is consistent across all active alternatives.

Q: Which substitute offers the best compliance profile for new designs?

A: The 5745781-3 (TE Connectivity) and 6E17C009SBF220 (Amphenol ICC) both offer RoHS compliance, active product status, and full electrical and mechanical equivalence to the 745781-3. The 5745781-3 maintains identical specifications within the same manufacturer series, while the 6E17C009SBF220 provides an alternative from a different manufacturer with additional features such as board lock and female screwlock configuration.

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