TE Connectivity 2-1734839-6 FPC Connector Equivalent & Substitute Parts

Part Overview

The TE Connectivity 2-1734839-6 is a 26-position flat flexible connector (FPC) with 0.5mm pitch, top-mounted contacts, and right-angle surface mount configuration. This connector features zero insertion force (ZIF) operation with slide lock mechanism and solder termination. The part is classified as obsolete, necessitating identification of active equivalent and substitute components that maintain functional compatibility within the specified electrical and mechanical parameters.

Substiute Parts

2-1734839-6

TE Connectivity AMP ConnectorsIn Stock: 10802-1734839-6 Datasheet

Current PartRFQ

26FLZ-RSM2-TB(LF)(SN)

JST Sales America Inc.In Stock: 94826FLZ-RSM2-TB(LF)(SN) Datasheet

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FH12-26S-0.5SH(55)

Hirose Electric Co LtdIn Stock: 2079FH12-26S-0.5SH(55) Datasheet

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ZF5S-26-01-T-WT

Samtec Inc.In Stock: 827ZF5S-26-01-T-WT Datasheet

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ZF5S-26-01-T-WT-TR

Samtec Inc.In Stock: 800ZF5S-26-01-T-WT-TR Datasheet

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ZF5S-26-02-T-WT

Samtec Inc.In Stock: 945ZF5S-26-02-T-WT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the TE Connectivity 2-1734839-6 is determined by strict alignment of the following critical parameters:

Primary Matching Criteria:

• Number of Positions: 26
• Pitch: 0.020" (0.50mm)
• Mounting Type: Surface Mount, Right Angle
• Termination: Solder
• FFC Thickness: 0.30mm
• Contact Material: Phosphor Bronze
• Features: Zero Insertion Force (ZIF)

Secondary Compatibility Factors:

• Connector/Contact Type (Top or Bottom orientation)
• Locking Feature mechanism (Slide Lock or Flip Lock)
• Cable End Type (Tapered or Straight)
• Contact Finish material (Gold or Tin)
• Housing and Actuator materials
• Operating temperature range
• Current rating capacity
• Voltage rating specifications

The identified substitute parts maintain the core 26-position, 0.5mm pitch FPC architecture with surface mount right-angle configuration. Variations in contact orientation (top vs. bottom), locking mechanisms, and material compositions are documented to enable informed selection based on specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

Direct Top-Contact Equivalent:

The Samtec ZF5S-26-02-T-WT provides the closest functional match to the TE Connectivity 2-1734839-6. Both connectors feature top-mounted contacts with 26 positions at 0.5mm pitch, surface mount right-angle configuration, and slide lock mechanisms. The ZF5S-26-02-T-WT is an active product with ROHS3 compliance. The primary differences are cable end type (straight vs. tapered) and contact finish (tin vs. gold). The Samtec part supports higher current capacity (1.8A per contact vs. 0.5A) and extended operating temperature range (-55°C to 105°C vs. -20°C to 85°C).

Bottom-Contact Alternatives:

For applications requiring bottom-mounted contacts, three active alternatives are available:

1. Samtec ZF5S-26-01-T-WT and ZF5S-26-01-T-WT-TR maintain identical electrical and mechanical specifications to the top-contact variant, with the distinction of bottom contact orientation. The TR variant provides tape and reel packaging. Both are ROHS3 compliant with extended temperature performance.

2. JST 26FLZ-RSM2-TB(LF)(SN) offers bottom contacts with tapered cable end type matching the original TE part. This connector maintains 0.5A current rating and slide lock mechanism. Voltage rating is 50V. ROHS3 compliant with UL94 V-0 flammability rating.

3. Hirose FH12-26S-0.5SH(55) provides bottom contacts with flip lock mechanism and gold contact finish. Operating temperature extends to -40°C. ROHS3 compliant with UL94 V-0 rating and documented mating cycle specification of 20 cycles.

Compliance Status:

All substitute parts maintain ROHS3 compliance and UL94 V-0 flammability ratings where specified. Moisture sensitivity level 1 (unlimited) is consistent across primary alternatives.

Frequently Asked Questions (FAQ)

Q: Can the Samtec ZF5S-26-02-T-WT directly replace the TE Connectivity 2-1734839-6?

A: The Samtec ZF5S-26-02-T-WT is functionally compatible for applications where the connector orientation, pitch, position count, and mounting type are primary requirements. Both parts feature 26 positions at 0.5mm pitch with top-mounted contacts and right-angle surface mount configuration. The Samtec part supports higher current capacity and extended temperature range. Cable end type differs (straight vs. tapered), which may affect cable routing in space-constrained designs.

Q: What is the difference between top-contact and bottom-contact FPC connectors?

A: Top-contact connectors position the FPC cable connection points on the upper surface of the connector body, while bottom-contact connectors position them on the lower surface. This distinction affects PCB layout and cable routing. The TE Connectivity 2-1734839-6 uses top contacts; bottom-contact alternatives are available from Samtec, JST, and Hirose if application requirements permit orientation change.

Q: Are there voltage rating differences between the main part and substitutes?

A: The TE Connectivity 2-1734839-6 specifies 250V voltage rating. The Samtec ZF5S series does not specify voltage rating in the provided data. The JST 26FLZ-RSM2-TB(LF)(SN) and Hirose FH12-26S-0.5SH(55) specify 50V voltage rating. Applications requiring 250V operation must verify substitute part voltage specifications with manufacturer documentation.

Q: What is the significance of the slide lock versus flip lock mechanism?

A: Both mechanisms provide zero insertion force (ZIF) operation for cable insertion and removal. Slide lock mechanisms (TE, Samtec, JST parts) operate via lateral sliding motion. Flip lock mechanisms (Hirose FH12 series) operate via rotational motion. Mechanism selection depends on available PCB space and assembly process requirements.

Q: How do contact finish materials affect connector performance?

A: The TE Connectivity 2-1734839-6 uses gold contact finish; most Samtec alternatives use tin finish. Gold provides superior corrosion resistance and lower contact resistance, particularly in high-reliability applications. Tin finish is cost-effective and suitable for standard industrial applications. Contact finish selection should align with application environment and reliability requirements.

Q: What is the impact of current rating differences?

A: The TE Connectivity 2-1734839-6 is rated for 0.5A per contact. The Samtec ZF5S series supports 1.8A per contact, providing higher current capacity for power distribution applications. The JST and Hirose alternatives maintain 0.5A rating. Current rating selection must accommodate application power requirements with appropriate safety margin.

Q: Are all substitute parts ROHS3 compliant?

A: All identified substitute parts are ROHS3 compliant. The TE Connectivity 2-1734839-6 is also ROHS3 compliant. Moisture sensitivity level 1 (unlimited) is consistent across primary alternatives, indicating no special storage or handling requirements.

Q: What packaging options are available for the substitute parts?

A: The Samtec ZF5S-26-01-T-WT is supplied in tube packaging. The Samtec ZF5S-26-01-T-WT-TR is supplied in tape and reel format. The Hirose FH12-26S-0.5SH(55) is available in cut tape and digi-reel packaging. Packaging selection affects inventory management and automated assembly compatibility.

Q: How do operating temperature ranges compare?

A: The TE Connectivity 2-1734839-6 operates from -20°C to 85°C. The Samtec ZF5S series extends to -55°C to 105°C, providing broader temperature performance. The JST 26FLZ-RSM2-TB(LF)(SN) operates from -25°C to 85°C. The Hirose FH12-26S-0.5SH(55) operates from -40°C to 85°C. Temperature range selection must accommodate application environment specifications.