FH21-6S-1DSA Equivalent & Substitute Parts

Part Overview

The FH21-6S-1DSA is a 6-position FFC/FPC vertical connector manufactured by Hirose Electric Co Ltd with 1.00mm pitch and through-hole mounting. This connector features low insertion force (LIF) design with kinked pin termination and is rated for 50V and 0.5A operation across -30°C to 70°C. The product is currently obsolete, necessitating identification of functionally equivalent alternatives for ongoing applications and new designs.

Substiute Parts

FH21-6S-1DSA

Hirose Electric Co LtdIn Stock: 1094FH21-6S-1DSA Datasheet

Current PartRFQ

84984-6

TE Connectivity AMP ConnectorsIn Stock: 320084984-6 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FH21-6S-1DSA is determined by the following critical parameters:

• Position Count & Pitch: Must be 6 positions at 0.039" (1.00mm) pitch for mechanical and electrical compatibility
• Mounting Configuration: Through-hole mounting with kinked pin termination required
• FFC/FPC Thickness: 0.30mm thickness specification must be maintained
• Electrical Ratings: Substitute must meet or exceed 50V voltage and 0.5A current requirements
• Contact Material & Finish: Phosphor bronze contacts with appropriate plating for signal integrity
• Operating Temperature: Must support minimum -30°C to 70°C range

The TE Connectivity AMP Connectors part 84984-6 qualifies as a substitute based on matching position count, pitch, mounting type, termination style, FFC thickness, and contact material. Differences in contact configuration (1-sided vs. 2-sided), housing material composition, and enhanced electrical ratings represent improvements over the obsolete Hirose part.

Parameter Comparison

Engineering Selection Recommendations

The 84984-6 from TE Connectivity AMP Connectors is the qualified substitute for the obsolete FH21-6S-1DSA. Selection of this alternative is supported by:

• Product Status: The FH21-6S-1DSA is obsolete, while 84984-6 maintains active production status with 3181 units in current inventory
• Compliance: 84984-6 is ROHS3 compliant, addressing regulatory requirements that the original non-compliant part cannot satisfy
• Electrical Performance: Enhanced voltage rating (125V vs. 50V) and current capacity (1A vs. 0.5A) provide operational margin
• Mechanical Compatibility: Identical pitch, position count, mounting type, and FFC thickness ensure direct PCB compatibility
• Material Specification: Glass-filled PBT housing in 84984-6 offers improved mechanical properties over standard PBT

The primary design consideration is the transition from 2-sided to 1-sided contact configuration. This change requires verification that the application does not depend on dual-sided contact functionality. Height above board differs by 0.21mm (5.80mm vs. 5.59mm), which should be evaluated against available clearance in the assembly.

Frequently Asked Questions (FAQ)

Q: Can 84984-6 directly replace FH21-6S-1DSA without PCB modification?

A: The 84984-6 maintains identical pitch (1.00mm), position count (6), and through-hole mounting configuration. PCB footprints designed for FH21-6S-1DSA will accommodate 84984-6 mechanically. However, the transition from 2-sided to 1-sided contact configuration requires confirmation that the application does not utilize dual-sided contact features.

Q: What is the significance of the contact configuration change from 2-sided to 1-sided?

A: The FH21-6S-1DSA features contacts on both sides of the connector body, while 84984-6 has contacts on one side. This affects how the connector interfaces with the flat flexible cable. Applications must be verified to ensure single-sided contact configuration meets functional requirements.

Q: Are there thermal or environmental concerns with the operating temperature range difference?

A: The FH21-6S-1DSA operates from -30°C to 70°C, while 84984-6 operates from -20°C to 85°C. For applications requiring operation below -20°C, the original specification cannot be met by this substitute. For applications within -20°C to 70°C, 84984-6 provides extended upper temperature capability.

Q: What is the impact of the contact finish change from solder plating to tin?

A: Solder plating on FH21-6S-1DSA facilitates wave soldering processes, while tin finish on 84984-6 is suitable for reflow soldering and standard PCB assembly. Assembly process compatibility should be verified based on manufacturing requirements.

Q: Does the higher voltage and current rating of 84984-6 affect circuit design?

A: The 84984-6 ratings (125V, 1A) exceed the FH21-6S-1DSA requirements (50V, 0.5A). Existing circuit designs operating within original specifications will function within the substitute's capabilities without modification.

Q: Is the glass-filled PBT housing in 84984-6 compatible with the original application?

A: Glass-filled PBT provides enhanced mechanical strength and thermal stability compared to standard PBT. This material upgrade is compatible with applications designed for standard PBT housing and offers improved durability.