TE Connectivity AMP 2-1734839-8 FPC Connector Equivalent & Substitute Parts

Part Overview

The TE Connectivity AMP 2-1734839-8 is a 28-position flat flexible connector (FPC) designed for surface mount, right-angle applications with 0.50mm pitch contacts. This connector features zero insertion force (ZIF) operation, solder retention, and a slide lock mechanism for secure cable termination. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Substiute Parts

2-1734839-8

TE Connectivity AMP ConnectorsIn Stock: 74972-1734839-8 Datasheet

Current PartRFQ

28FLZ-SM2-TB

JST Sales America Inc.In Stock: 69228FLZ-SM2-TB Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TE Connectivity AMP 2-1734839-8 is determined by strict alignment of the following critical parameters:

Mandatory Matching Parameters:

• Number of Positions: 28
• Pitch: 0.020" (0.50mm)
• Mounting Type: Surface Mount, Right Angle
• Connector/Contact Type: Contacts, Top
• Termination: Solder
• FFC, FCB Thickness: 0.30mm
• Locking Feature: Slide Lock
• Cable End Type: Tapered
• Contact Material: Phosphor Bronze
• Features: Solder Retention, Zero Insertion Force (ZIF)
• Material Flammability Rating: UL94 V-0
• Current Rating: 0.5A
• Moisture Sensitivity Level: 1 (Unlimited)

The JST Sales America Inc. 28FLZ-SM2-TB meets all mandatory matching parameters and qualifies as a functional equivalent. Variations in contact finish material (gold versus tin), housing material composition (thermoplastic versus polyamide), voltage rating (250V versus 50V), and operating temperature range (-20°C ~ 85°C versus -25°C ~ 85°C) are within acceptable substitution tolerances for most applications, provided the application requirements do not exceed the substitute part's electrical specifications.

Parameter Comparison

Engineering Selection Recommendations

The JST Sales America Inc. 28FLZ-SM2-TB is the identified equivalent substitute for the obsolete TE Connectivity AMP 2-1734839-8. Selection of this substitute is supported by the following engineering criteria:

Product Status Alignment: The substitute part maintains active product status, ensuring ongoing availability and manufacturing support, whereas the original part is classified as obsolete.

Compliance Certifications: Both parts maintain UL94 V-0 material flammability ratings and comply with RoHS directives (ROHS3 and RoHS respectively), satisfying regulatory requirements for electronic component applications.

Electrical and Mechanical Compatibility: The substitute part matches all critical functional parameters including 28-position configuration, 0.50mm pitch, surface mount right-angle orientation, solder termination, and zero insertion force operation with slide lock mechanism.

Packaging Consideration: The substitute part is supplied in Tape & Reel (TR) packaging, whereas the original part is supplied in Cut Tape (CT) packaging. This difference affects procurement and assembly processes but does not impact electrical or mechanical performance.

Voltage Rating Differential: The substitute part is rated for 50V operation compared to the original part's 250V rating. Applications requiring voltage ratings exceeding 50V must retain the original part specification or identify alternative substitutes with higher voltage ratings.

Operating Temperature Range: The substitute part extends the lower operating temperature limit to -25°C compared to the original part's -20°C minimum, providing enhanced low-temperature performance capability.

Frequently Asked Questions (FAQ)

Q: Can the JST 28FLZ-SM2-TB directly replace the TE Connectivity 2-1734839-8 in all applications?

A: The JST 28FLZ-SM2-TB is mechanically and electrically compatible for applications operating at 50V or below. Applications requiring voltage ratings above 50V must use the original TE Connectivity part or identify alternative substitutes with higher voltage specifications. All other functional parameters align between the two parts.

Q: What is the significance of the contact finish difference between gold and tin?

A: The original part features gold contact finish, while the substitute features tin contact finish. Both finishes provide adequate electrical conductivity and corrosion resistance for standard FPC connector applications. Gold finish offers superior corrosion resistance in high-humidity or corrosive environments, while tin finish is suitable for standard industrial and consumer applications.

Q: How does the housing material difference affect performance?

A: The original part uses thermoplastic housing material, while the substitute uses polyamide (PA6T) nylon 6T. Both materials meet UL94 V-0 flammability requirements and provide adequate mechanical strength for surface mount applications. Polyamide offers enhanced thermal stability and chemical resistance compared to standard thermoplastic materials.

Q: What packaging differences exist between these parts?

A: The original part is supplied in Cut Tape (CT) packaging, while the substitute is supplied in Tape & Reel (TR) packaging. Cut Tape packaging is suitable for manual or small-volume assembly, while Tape & Reel packaging is optimized for automated pick-and-place assembly equipment. This difference affects procurement logistics and assembly processes but not component performance.

Q: Are both parts RoHS compliant?

A: Yes. The original TE Connectivity part is ROHS3 compliant, and the JST substitute is RoHS compliant. Both parts meet regulatory requirements for hazardous substance restrictions in electronic components.

Q: What is the height difference between the two connectors?

A: The original part has a height above board of 0.081" (2.05mm), while the substitute has a height of 0.079" (2.00mm). This 0.002" (0.05mm) difference is negligible for most PCB layout applications and does not affect mechanical compatibility or performance.

Q: Can the substitute part operate at the original part's -20°C minimum temperature?

A: Yes. The substitute part is rated for -25°C ~ 85°C operation, which encompasses the original part's -20°C ~ 85°C range. The substitute part provides extended low-temperature capability.