FH21-24S-1DSA Equivalent & Substitute Parts

Part Overview

The FH21-24S-1DSA is a 24-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) operation and is designed for flat flexible cable applications. The part is currently listed as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

FH21-24S-1DSA

Hirose Electric Co LtdIn Stock: 1061FH21-24S-1DSA Datasheet

Current PartRFQ

0528062410

MolexIn Stock: 34440528062410 Datasheet

MFR RecommendedRFQ

2-84984-4

TE Connectivity AMP ConnectorsIn Stock: 11782-84984-4 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FH21-24S-1DSA is determined by the following critical parameters:

• Position Count & Pitch: All substitute parts must maintain 24 positions at 0.039" (1.00mm) pitch to ensure mechanical and electrical compatibility with existing cable assemblies and PCB layouts.
• Mounting Configuration: Through-hole mounting is required to match the original PCB footprint.
• Termination Style: Kinked pin termination must be preserved for proper solder joint formation.
• FFC/FCB Thickness: 0.30mm thickness ensures compatibility with cable specifications.
• Electrical Ratings: Substitute parts must meet or exceed the voltage (50V minimum) and current (0.5A minimum) requirements.
• Environmental Compliance: UL94 V-0 flammability rating and operating temperature range define acceptable thermal and safety performance boundaries.

The two substitute parts listed below satisfy these core substitution criteria while offering improved product status and compliance profiles.

Parameter Comparison

Engineering Selection Recommendations

Molex 0528062410: This part is the primary substitute option. It maintains electrical parity with the original FH21-24S-1DSA (50V, 0.5A) and offers active product status with ROHS3 compliance. The connector features 1-sided vertical contacts compared to the original 2-sided design, which may require PCB layout verification. Height above board is slightly reduced (5.40mm vs 5.80mm), necessitating clearance confirmation. The part is supplied in tray packaging with 3350 units in stock.

TE Connectivity 2-84984-4: This alternative provides enhanced electrical ratings (125V, 1A) and extended operating temperature range (-20°C ~ 85°C), offering design margin above the original specifications. ROHS3 compliance is confirmed. The connector also features 1-sided vertical contacts. Height above board (5.59mm) is closer to the original dimension. Tube packaging is provided with 1075 units in stock. Material flammability rating is not specified in available documentation.

Both substitutes satisfy the core substitution criteria of 24 positions, 1.00mm pitch, through-hole mounting, kinked pin termination, and 0.30mm FFC/FCB thickness. Selection between these options depends on specific application requirements regarding contact configuration, electrical margin, and compliance documentation needs.

Frequently Asked Questions (FAQ)

Q: Can the Molex 0528062410 or TE Connectivity 2-84984-4 be used as direct replacements for the FH21-24S-1DSA?

A: Both parts satisfy the core substitution criteria: 24 positions, 0.039" (1.00mm) pitch, through-hole mounting, kinked pin termination, and 0.30mm FFC/FCB thickness. However, the original FH21-24S-1DSA features 2-sided vertical contacts, while both substitutes have 1-sided vertical contacts. This difference requires verification of PCB layout compatibility and cable assembly orientation before implementation.

Q: What is the significance of the height above board difference?

A: The FH21-24S-1DSA has a height of 0.228" (5.80mm), while the Molex substitute is 0.213" (5.40mm) and the TE Connectivity substitute is 0.220" (5.59mm). These variations must be evaluated against PCB clearance requirements, enclosure constraints, and any mechanical interference with adjacent components or assemblies.

Q: Are both substitute parts RoHS compliant?

A: Yes. The Molex 0528062410 and TE Connectivity 2-84984-4 are both ROHS3 compliant. The original FH21-24S-1DSA is RoHS non-compliant, making either substitute suitable for applications requiring RoHS compliance.

Q: What are the packaging differences?

A: The Molex 0528062410 is supplied in tray packaging with 3350 units in stock. The TE Connectivity 2-84984-4 is supplied in tube packaging with 1075 units in stock. Packaging selection may impact procurement logistics and handling procedures.

Q: How do the electrical ratings compare?

A: The FH21-24S-1DSA and Molex 0528062410 are electrically equivalent at 50V and 0.5A. The TE Connectivity 2-84984-4 provides higher ratings at 125V and 1A, offering additional design margin for applications with potential voltage or current growth.

Q: What is the operating temperature range for each part?

A: The FH21-24S-1DSA operates from -30°C to 70°C. The Molex 0528062410 operates from -20°C to 80°C. The TE Connectivity 2-84984-4 operates from -20°C to 85°C. Both substitutes provide extended upper temperature limits, though the original part supports lower minimum temperatures.