TE Connectivity 2-1734207-3 D-Sub Connector Equivalent & Substitute Parts

Part Overview

The TE Connectivity AMP Connectors 2-1734207-3 is a 25-position D-Sub stacked connector with right-angle solder termination, designed for signal applications. This connector features a plug with male pins and receptacle with female sockets in a DB-3 shell size configuration. The part is classified as obsolete, necessitating identification of active equivalent and substitute components that maintain functional compatibility across electrical and mechanical parameters.

Key Parameters

Parameter	Value
Connector Style	D-Sub - Stacked
Number of Positions	25, 25
Number of Rows	2, 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
Current Rating (Amps)	1.5~3A
Voltage Rating	250V
Operating Temperature	-55°C ~ 105°C
RoHS Status	ROHS3 Compliant
Color	Black

Substitute Part Grouping Explanation

Substitution of the TE Connectivity 2-1734207-3 is determined by strict alignment of the following parameters:

Critical Matching Parameters:

Connector style: D-Sub - Stacked
Position count: 25, 25
Row configuration: 2, 2
Shell size: 3 (DB, B)
Termination method: Solder
Mounting orientation: Right Angle
Shell material and finish: Steel, Nickel Plated
Contact finish: Gold
Operating temperature range: -55°C ~ 105°C
Compliance: ROHS3 Compliant

Acceptable Variations:

Current rating: Substitute parts rated at 5A exceed the 1.5~3A requirement and remain compatible
Mounting type: Substitute parts include Panel Mount or Board Edge options in addition to Through Hole, providing installation flexibility
Flange feature configuration: Variations in flange design (Housing/Shell vs. Mating Side Female Screwlock) do not affect core electrical function
Contact form and material: Stamped brass contacts in substitutes provide equivalent performance to the main part
Packaging format: Tray or Tube packaging does not affect connector functionality

The NorComp Inc. Series 178 and 179 D-Sub connectors meet all critical parameters and are classified as active products, providing long-term availability and supply chain stability.

Parameter Comparison

Parameter	2-1734207-3 (TE Connectivity)	178-025-313R451 (NorComp)	178-025-313R491 (NorComp)	178-025-313R571 (NorComp)	178-025-313R691 (NorComp)	179-025-313R451 (NorComp)	179-025-313R571 (NorComp)
Connector Style	D-Sub - Stacked	D-Sub - Stacked	D-Sub - Stacked	D-Sub - Stacked	D-Sub - Stacked	D-Sub - Stacked	D-Sub - Stacked
Number of Positions	25, 25	25, 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, 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)
Mounting Type	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	Board Edge, Through Hole, Right Angle
Termination	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
Contact Finish	Gold	Gold	Gold	Gold	Gold	Gold	Gold
Current Rating (Amps)	1.5~3A	5A	5A	5A	5A	5A	5A
Operating Temperature	-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 ~ 105°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Color	Black	Black	Black	Black	Black	Black	Black
Product Status	Obsolete	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Primary Substitutes for General Applications:

The NorComp Series 178 and 179 D-Sub connectors provide direct functional equivalence to the TE Connectivity 2-1734207-3. All substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original component.

Series 178 Selection (Panel Mount Applications):

178-025-313R491: Recommended for applications requiring board lock feature with grounding indents and shielding. Highest inventory availability (1,123 pcs) supports production continuity.
178-025-313R571: Suitable for applications requiring female screwlock mating interface with board lock and shielding. Largest inventory stock (4,869 pcs) ensures extended supply availability.
178-025-313R451: Applicable for standard panel mount installations with grounding indents and shielding where board lock is not required.
178-025-313R691: Provides board lock, grounding indents, and shielding with housing/shell flange configuration.

Series 179 Selection (Board Edge Applications):

179-025-313R571: Recommended for board edge mounting with female screwlock interface, board lock, grounding indents, and shielding.
179-025-313R451: Applicable for board edge mounting with grounding indents and shielding where board lock is not required.

Compliance and Availability: All substitute parts are active products with ROHS3 compliance and REACH unaffected status. The higher current rating (5A vs. 1.5~3A) of substitute parts provides enhanced performance margin without compromising compatibility. Selection should be based on specific mounting requirements (panel mount vs. board edge) and feature requirements (board lock, shielding, screwlock interface).

Frequently Asked Questions (FAQ)

Q: Can NorComp Series 178 and 179 connectors directly replace the TE Connectivity 2-1734207-3?

A: Yes. All substitute parts maintain identical connector style, position count, row configuration, shell size, termination method, and operating temperature range. The higher current rating of substitute parts (5A) exceeds the original specification (1.5~3A) and does not affect compatibility.

Q: What is the difference between Series 178 and Series 179 connectors?

A: The primary difference is mounting type. Series 178 connectors are designed for panel mount applications, while Series 179 connectors are configured for board edge mounting. Both series maintain identical electrical specifications and shell configurations.

Q: Does the flange feature variation affect connector function?

A: No. Flange feature variations (Housing/Shell vs. Mating Side Female Screwlock) do not affect electrical performance or core mechanical compatibility. Selection should be based on installation requirements and mating interface preferences.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All NorComp Series 178 and 179 substitute parts are ROHS3 compliant and REACH unaffected, matching the regulatory status of the original TE Connectivity component.

Q: What packaging options are available for substitute parts?

A: NorComp substitute parts are available in Tray and Tube packaging formats. Packaging selection does not affect connector electrical or mechanical performance and should be based on handling and storage requirements.

Q: Why do substitute parts have a higher current rating (5A vs. 1.5~3A)?

A: The higher current rating reflects the design specifications of the NorComp substitute connectors. This increased rating provides additional performance margin and does not create compatibility issues with applications designed for the original 1.5~3A specification.

Q: Which substitute part should be selected for new designs?

A: For new designs, select based on mounting requirements: Series 178 for panel mount applications or Series 179 for board edge applications. Within each series, choose based on feature requirements (board lock, shielding, screwlock interface). All options provide equivalent electrical performance and long-term supply availability.

Q: Are there inventory considerations when selecting a substitute?

A: Yes. Inventory levels vary across substitute parts. Series 178-025-313R571 maintains the highest inventory (4,869 pcs), followed by 178-025-313R491 (1,123 pcs). For applications with extended production timelines, higher inventory parts may provide supply chain advantages.

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