TE Connectivity 747145-2 D-Sub 50 Position Receptacle Equivalent & Substitute Parts

Part Overview

The TE Connectivity AMP Connectors 747145-2 is a 50 position D-Sub receptacle connector featuring female sockets, vertical through-hole mounting, and press-fit termination. This connector is part of the AMPLIMITE HD-20 series and is classified as an active product. The 747145-2 employs a mating side female screwlock (4-40) flange feature with steel tin-plated shell and gold-plated contacts.

Equivalent and substitute parts are necessary when the primary part number becomes unavailable, when alternative termination methods are required for specific manufacturing processes, or when different flange configurations are needed for particular application requirements. Substitute connectors maintain compatibility through matching electrical and mechanical parameters including connector style, position count, shell size, mounting type, and operating temperature range.

Key Parameters

Parameter	Specification
Connector Style	D-Sub
Connector Type	Receptacle, Female Sockets
Number of Positions	50
Number of Rows	3
Shell Size, Connector Layout	5 (DD, D)
Mounting Type	Through Hole
Contact Type	Signal
Termination	Press-Fit
Shell Material, Finish	Steel, Tin Plated
Contact Finish	Gold
Material Flammability Rating	UL94 V-0
Dielectric Material	Thermoplastic
Contact Material	Copper Alloy
Operating Temperature	-55°C ~ 105°C
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the TE Connectivity 747145-2 is determined by strict adherence to the following core parameters:

Critical Matching Parameters:

Connector style: D-Sub
Connector type: Receptacle, Female Sockets
Number of positions: 50
Number of rows: 3
Shell size and layout: 5 (DD, D)
Mounting type: Through Hole
Contact type: Signal
Material flammability rating: UL94 V-0
Dielectric material: Thermoplastic
Operating temperature range: -55°C to 105°C minimum

Variable Parameters Allowing Substitution:

Termination method: Press-Fit (primary) to Solder (substitute)
Flange feature: Mating side female screwlock (4-40) to Housing/Shell (Unthreaded) or Board Side configurations
Shell finish: Steel Tin Plated (primary) to Steel Yellow Cadmium Plated or Steel Tin Plated (substitute)
Contact finish thickness: Varies across substitutes
Contact material: Copper Alloy (primary) to Phosphor Bronze or Brass (substitute)
Contact form: Varies between Stamped and Machined
Dielectric material detail: Thermoplastic (primary) to Thermoplastic Glass Filled (substitute)

Substitutes are grouped by termination method and flange configuration. Press-fit terminated parts are direct equivalents. Solder-terminated parts require process compatibility verification but maintain electrical and mechanical interface specifications.

Parameter Comparison

Parameter	747145-2 (Main)	5747145-2	DDM50S300	L77DD50SU	L77SDD50SOL2	L77SDD50SOL2C309	L77SDDG50SOL2RM5	L77SDDH50SOL2	L77SDDH50SOL2C309	L77SDDH50SOL2RM5	L77SDDH50SOL2RM5C309
Connector Style	D-Sub	D-Sub	D-Sub	D-Sub	D-Sub	D-Sub	D-Sub	D-Sub	D-Sub	D-Sub	D-Sub
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	50	50	50	50	50	50	50	50	50	50	50
Number of Rows	3	3	3	3	3	3	3	3	3	3	3
Shell Size, Connector Layout	5 (DD, D)	5 (DD, D)	5 (DD, D)	5 (DD, D)	5 (DD, D)	5 (DD, D)	5 (DD, D)	5 (DD, D)	5 (DD, D)	5 (DD, D)	5 (DD, D)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Contact Type	Signal	Signal	Signal	Signal	Signal	Signal	Signal	Signal	Signal	Signal	Signal
Termination	Press-Fit	Press-Fit	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder
Shell Material, Finish	Steel, Tin Plated	Steel, Tin Plated	Steel, Yellow Cadmium Plated	Steel, Tin Plated	Steel, Tin Plated	Steel, Tin Plated	Steel, Tin Plated	Steel, Tin Plated	Steel, Tin Plated	Steel, Tin Plated	Steel, Tin Plated
Contact Finish	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold
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
Operating Temperature	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
RoHS Status	Not applicable	ROHS3 Compliant	RoHS non-compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant
REACH Status	REACH Affected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Direct Equivalent (Press-Fit Termination):

The TE Connectivity 5747145-2 is the direct equivalent to the 747145-2. Both parts share identical electrical and mechanical specifications with press-fit termination. The 5747145-2 offers improved compliance status with ROHS3 Compliant certification and REACH Unaffected designation, compared to the main part's Not Applicable RoHS status and REACH Affected status. Selection of 5747145-2 is appropriate when press-fit termination is required and regulatory compliance is a design consideration.

Solder-Terminated Substitutes:

Amphenol ICC (Commercial Products) L77 series connectors provide solder termination alternatives. These parts maintain all critical mechanical and electrical parameters but require process compatibility with wave soldering or selective soldering assembly methods. All L77 series substitutes are RoHS Compliant and REACH Unaffected.

The L77SDD50SOL2 and L77SDD50SOL2C309 variants feature Housing/Shell (Unthreaded) flange configuration, suitable for applications where mating side screwlock is not required. The L77SDDH50SOL2 and L77SDDH50SOL2C309 variants provide Board Side (4-40) flange configuration, matching the mating side screwlock thread specification of the main part. The L77SDDG50SOL2RM5 variant includes Board Side (M3) flange with Board Lock feature.

Amphenol ICC (FCI) DDM50S300:

The DDM50S300 is a solder-terminated 50 position D-Sub receptacle with Housing/Shell (Unthreaded) flange. This part features Yellow Cadmium Plated shell finish and Phosphor Bronze contact material. Operating temperature extends to 125°C. The DDM50S300 is RoHS non-compliant and REACH Unaffected. Selection is appropriate for legacy applications or when cadmium plating is specified.

Amphenol ICC (Commercial Products) L77DD50SU:

The L77DD50SU provides solder termination with Housing/Shell (Unthreaded) flange configuration. This part features Machined contact form and Brass contact material with 8.00µin (0.203µm) gold contact finish thickness. Operating temperature extends to 125°C. The L77DD50SU is RoHS Compliant and REACH Unaffected.

Flange Configuration Considerations:

Selection between Housing/Shell (Unthreaded), Board Side (4-40), and Board Side (M3) flange configurations depends on mechanical mounting requirements. The main part 747145-2 specifies Mating Side Female Screwlock (4-40), which is not directly replicated in the substitute list. Board Side (4-40) variants such as L77SDDH50SOL2 provide equivalent thread specification but on the board-mounting surface rather than the mating surface.

Regulatory and Compliance Selection:

For applications requiring RoHS compliance, select from 5747145-2, L77DD50SU, L77SDD50SOL2, L77SDD50SOL2C309, L77SDDG50SOL2RM5, L77SDDH50SOL2, L77SDDH50SOL2C309, L77SDDH50SOL2RM5, or L77SDDH50SOL2RM5C309. All these parts are RoHS Compliant. For REACH Unaffected status, all substitutes except the main part 747145-2 qualify.

Frequently Asked Questions (FAQ)

Q: Can the 747145-2 be directly replaced with the 5747145-2?

A: Yes. The 5747145-2 is a direct equivalent with identical electrical and mechanical specifications. Both employ press-fit termination, 50 positions, 3 rows, shell size 5 (DD, D), through-hole mounting, and operate across -55°C to 105°C. The 5747145-2 offers improved regulatory compliance with ROHS3 Compliant and REACH Unaffected designations.

Q: What is the primary difference between press-fit and solder-terminated substitutes?

A: Press-fit termination (747145-2 and 5747145-2) uses mechanical insertion of contacts into the connector body without soldering. Solder-terminated substitutes (L77 series and DDM50S300) require wave soldering or selective soldering during assembly. The choice depends on manufacturing process capability and design requirements. All other electrical and mechanical parameters remain equivalent.

Q: Are the L77SDDH50SOL2 variants compatible with the 747145-2 mounting interface?

A: The L77SDDH50SOL2 variants feature Board Side (4-40) flange configuration, providing the same 4-40 thread specification as the main part's Mating Side Female Screwlock (4-40). However, the flange location differs: Board Side mounting places the flange on the board-mounting surface, while Mating Side places it on the connector mating surface. Mechanical compatibility depends on the specific application's mounting requirements.

Q: What is the significance of the C309 designation in part numbers like L77SDD50SOL2C309?

A: The C309 designation indicates a specific contact finish thickness specification of 30.0µin (0.76µm) gold plating. Parts without this designation have Flash gold finish thickness. Both specifications provide equivalent electrical performance and gold contact protection. Selection depends on design specifications for contact finish thickness.

Q: Can the DDM50S300 be used as a substitute in all applications?

A: The DDM50S300 is electrically and mechanically compatible for 50 position D-Sub receptacle applications. However, it features Yellow Cadmium Plated shell finish instead of Tin Plated, and is RoHS non-compliant. Use is restricted to applications where cadmium plating is acceptable and RoHS compliance is not required. Operating temperature extends to 125°C, providing broader thermal capability than the main part.

Q: What is the Board Lock feature in L77SDDG50SOL2RM5 and L77SDDH50SOL2RM5 variants?

A: The Board Lock feature provides mechanical retention of the connector to the printed circuit board through additional locking mechanisms. This feature is specified in the part designation (RM5 suffix). Selection of Board Lock variants is appropriate for applications requiring enhanced mechanical stability or vibration resistance.

Q: Are all substitute parts available in equivalent inventory quantities?

A: Inventory levels vary across substitute parts. The main part 747145-2 has 1023 pieces in stock. The 5747145-2 direct equivalent has 1034 pieces. Solder-terminated substitutes range from 786 to 1413 pieces in stock. Specific inventory availability should be confirmed for production requirements.

Q: What is the difference between Stamped and Machined contact forms?

A: Contact form refers to the manufacturing method of the contact element. Stamped contacts are formed through stamping processes and are used in L77 series substitutes. Machined contacts are individually machined and are used in the L77DD50SU variant. Both forms provide equivalent electrical performance. Selection depends on design specifications or manufacturing process requirements.

Q: Do all substitutes maintain the same operating temperature range as the 747145-2?

A: The main part 747145-2 operates from -55°C to 105°C. All solder-terminated substitutes (L77 series and DDM50S300) extend the upper operating temperature to 125°C. This extended range provides additional thermal margin for high-temperature applications. The 5747145-2 direct equivalent maintains the same -55°C to 105°C range as the main part.

Q: What contact material differences exist between substitutes?

A: The main part 747145-2 uses Copper Alloy contacts. Substitutes employ Phosphor Bronze (L77 series) or Brass (L77DD50SU) contact materials. All materials provide equivalent electrical conductivity and contact reliability. Contact material selection is determined by the connector series design and does not affect electrical performance for signal applications.

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