TE Connectivity 1734350-1 D-Sub 25 Position Receptacle Equivalent & Substitute Parts

Part Overview

The TE Connectivity 1734350-1 is a 25 Position D-Sub Receptacle connector with female sockets, right-angle solder termination, and through-hole mounting. This connector is part of the AMPLIMITE HD-20 series and is classified as obsolete. Due to its obsolete status, equivalent and substitute parts from active manufacturers are necessary for ongoing production, maintenance, and design continuity. The connector features a 2-row configuration with Shell Size 3 (DB, B) layout, nickel-plated steel shell, gold-flashed contacts, and operates across a temperature range of -55°C to 105°C.

Key Parameters

Parameter	Value
Connector Style	D-Sub
Connector Type	Receptacle, Female Sockets
Number of Positions	25
Number of Rows	2
Shell Size, Connector Layout	3 (DB, B)
Mounting Type	Through Hole, Right Angle
Termination	Solder
Shell Material, Finish	Steel, Nickel Plated
Contact Finish	Gold, Flash
Current Rating (Amps)	2A
Voltage Rating	250V
Operating Temperature	-55°C ~ 105°C
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the TE Connectivity 1734350-1 is determined by strict adherence to the following parameters:

Critical Matching Parameters:

Connector Style: D-Sub
Connector Type: Receptacle, Female Sockets
Number of Positions: 25
Number of Rows: 2
Shell Size, Connector Layout: 3 (DB, B)
Mounting Type: Through Hole, Right Angle
Termination: Solder
Shell Material, Finish: Steel, Nickel Plated
Contact Finish: Gold, Flash
Material Flammability Rating: UL94 V-0
Backset Spacing: 0.318" (8.08mm)

Allowable Variation Parameters:

Current Rating: Substitute parts with equal or higher current ratings (2A or greater) are acceptable
Voltage Rating: Substitute parts with equal or higher voltage ratings (250V or greater) are acceptable
Operating Temperature: Substitute parts must maintain the lower temperature limit of -55°C; upper limit may vary
Dielectric Material: Variations in dielectric material composition are acceptable provided UL94 V-0 rating is maintained
Contact Material: Variations between Phosphor Bronze and Copper Alloy are acceptable
Flange Feature: Variations in flange configuration are acceptable (Housing/Shell threaded or unthreaded, Mating Side Female Screwlock)
Product Status: Active status is preferred over obsolete status

Substitute parts are grouped based on these criteria. All substitute parts listed maintain the core electrical and mechanical compatibility required for direct functional replacement in applications designed for the 1734350-1.

Parameter Comparison

Parameter	1734350-1 (Main)	2311762-1	622-025-260-032	182-025-213R161	182-025-213R171	182-025-213R181	182-025-213R431	182-025-213R451	182-025-213R561	622-025-260-033	A-DF 25 A/KG-F
Manufacturer	TE Connectivity	TE Connectivity	Mercury United Electronics	NorComp Inc.	NorComp Inc.	NorComp Inc.	NorComp Inc.	NorComp Inc.	NorComp Inc.	Mercury United Electronics	Assmann WSW
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	25	25	25	25	25	25	25	25	25	25	25
Number of Rows	2	2	2	2	2	2	2	2	2	2	2
Shell Size, Connector Layout	3 (DB, B)	3 (DB, B)	3 (DB, B)	3 (DB, B)	3 (DB, B)	3 (DB, B)	3 (DB, B)	3 (DB, B)	3 (DB, B)	3 (DB, B)	3 (DB, B)
Mounting Type	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	Panel Mount, Through Hole, Right Angle	Panel Mount, Through Hole, Right Angle	Panel Mount, Through Hole, Right Angle	Board Edge, Through Hole, Right Angle	Through Hole, Right Angle
Termination	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder
Shell Material, Finish	Steel, Nickel Plated	Steel, Nickel Plated	Steel, Nickel 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, Flash	Gold, Flash	Gold, Flash	Gold, Flash	Gold, Flash	Gold, Flash	Gold, Flash	Gold, Flash	Gold, Flash	Gold, Flash	Gold, Flash
Current Rating (Amps)	2A	3A	3A per Contact	5A	5A	5A	5A	5A	5A	3A per Contact	3A
Voltage Rating	250V	Not Specified	Not Specified	Not Specified	Not Specified	Not Specified	Not Specified	Not Specified	Not Specified	Not Specified	250V
Backset Spacing	0.318" (8.08mm)	0.318" (8.08mm)	0.318" (8.08mm)	0.318" (8.08mm)	0.318" (8.08mm)	0.318" (8.08mm)	0.318" (8.08mm)	0.318" (8.08mm)	0.318" (8.08mm)	0.318" (8.08mm)	0.319" (8.10mm)
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 ~ 85°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 85°C	-20°C ~ 85°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All substitute parts listed maintain ROHS3 compliance and UL94 V-0 flammability rating, ensuring regulatory and safety standard adherence equivalent to the original 1734350-1 part.

Primary Recommendation: TE Connectivity 2311762-1

The 2311762-1 is the direct active equivalent from the same manufacturer and series (AMPLIMITE HD-20). It maintains identical mechanical and electrical specifications with the exception of increased current rating (3A versus 2A) and dielectric material composition (Glass Filled PBT). This part is the preferred substitute for direct replacement applications and offers the highest design continuity.

Secondary Recommendations: NorComp 182 Series (182-025-213R161, 182-025-213R171, 182-025-213R181, 182-025-213R431, 182-025-213R451, 182-025-213R561)

The NorComp 182 series parts are active alternatives with enhanced current ratings (5A) and extended temperature range compatibility (-55°C to 105°C). These parts feature panel mount capability in addition to through-hole mounting. Flange feature variations exist across the series, allowing selection based on specific mechanical requirements. All parts maintain the required Shell Size 3 (DB, B) configuration and solder termination.

Tertiary Recommendations: Mercury United Electronics 622 Series (622-025-260-032, 622-025-260-033)

The Mercury 622 series parts provide active alternatives with 3A current rating and board edge mounting capability. These parts include shielding and mounting brackets as standard features. Operating temperature range is limited to -55°C to 85°C, which is acceptable for applications not requiring the full 105°C upper limit of the original part.

Alternative Recommendation: Assmann WSW A-DF 25 A/KG-F

The Assmann A-DF 25 A/KG-F is an active alternative with 3A current rating and integrated filter feature. This part features tin-plated shell finish (versus nickel-plated) and operates across -20°C to 85°C temperature range. The operating temperature lower limit of -20°C restricts use in applications requiring -55°C operation.

Frequently Asked Questions (FAQ)

Q: Can the TE Connectivity 2311762-1 be used as a direct replacement for the 1734350-1?

A: Yes. The 2311762-1 is functionally equivalent to the 1734350-1 with identical connector style, type, position count, shell size, mounting type, and termination method. The 2311762-1 features a higher current rating (3A versus 2A) and glass-filled dielectric material, both of which are acceptable variations for substitution. The 2311762-1 is active status, whereas the 1734350-1 is obsolete.

Q: What is the difference between the NorComp 182 series parts?

A: The NorComp 182 series parts share identical electrical and core mechanical specifications but differ in flange feature configuration and optional features. Part 182-025-213R161 and 182-025-213R431 feature unthreaded housing/shell flanges. Part 182-025-213R171 and 182-025-213R451 feature 4-40 threaded housing/shell flanges. Part 182-025-213R181 and 182-025-213R561 feature mating side female screwlock (4-40) flanges. Parts 182-025-213R161, 182-025-213R171, and 182-025-213R181 include ground strap features. Selection depends on specific flange and grounding requirements of the application.

Q: Are there temperature limitations with substitute parts?

A: The original 1734350-1 operates from -55°C to 105°C. The TE Connectivity 2311762-1 and NorComp 182 series maintain this full range. The Mercury 622 series and Assmann A-DF 25 A/KG-F are limited to -55°C to 85°C and -20°C to 85°C respectively. For applications requiring operation above 85°C or below -20°C, the 2311762-1 or NorComp 182 series are required.

Q: What is the significance of the backset spacing parameter?

A: Backset spacing of 0.318" (8.08mm) is a critical mechanical parameter that determines the distance from the connector mounting surface to the contact insertion point. All substitute parts maintain this specification within tolerance (0.319" for the Assmann part is within acceptable mechanical variation). This ensures proper mating with corresponding plug connectors and PCB layout compatibility.

Q: Do all substitute parts have the same current rating as the original?

A: No. The original 1734350-1 has a 2A current rating. Substitute parts feature equal or higher ratings: 2311762-1 (3A), 622 series (3A per contact), 182 series (5A), and A-DF 25 A/KG-F (3A). Higher current ratings are acceptable for substitution as they indicate enhanced contact capability.

Q: What packaging options are available for substitute parts?

A: The original 1734350-1 packaging is not specified. Substitute parts are available in Bulk packaging (TE Connectivity 2311762-1, Mercury 622 series) and Tray packaging (NorComp 182 series, Assmann A-DF 25 A/KG-F). Packaging selection depends on procurement and inventory management requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant, matching the compliance status of the original 1734350-1. This ensures regulatory compliance for applications subject to RoHS directives.

Q: What is the difference between nickel-plated and tin-plated shell finishes?

A: The original 1734350-1 and most substitute parts feature nickel-plated steel shells. The Assmann A-DF 25 A/KG-F features tin-plated steel shell. Both finishes provide corrosion resistance and electrical conductivity. Nickel plating is standard for D-Sub connectors. Tin plating is an alternative finish that may be specified for specific environmental or compatibility requirements.

Q: Can the Mercury 622 series parts be used in applications requiring -55°C operation?

A: The Mercury 622 series parts are rated for -55°C to 85°C operation, so they can be used in applications requiring -55°C operation. However, they are not suitable for applications requiring operation above 85°C. For full temperature range compatibility (-55°C to 105°C), use the TE Connectivity 2311762-1 or NorComp 182 series.

Q: What does "Board Lock" feature mean?

A: Board Lock is a mechanical feature that provides positive retention of the connector to the PCB during mating and unmating operations. The original 1734350-1 includes this feature. Substitute parts with Board Lock feature include 2311762-1, 622 series, and 182-025-213R561. This feature is optional and depends on application requirements for connector retention.

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