FSB43004A Motor Driver IC - Equivalent & Substitute Parts

Part Overview

The FSB43004A is a fully integrated motor driver IC designed for brushless DC (BLDC) motor control applications. It features a half-bridge output configuration with three independent channels, operating within a 14.6V to 16.5V supply voltage range. The device integrates both control and power stages using Power MOSFET technology in a 22-DIP through-hole package.

The original FSB43004A manufactured by onsemi is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure component availability, and support ongoing production or maintenance requirements for systems utilizing this motor driver architecture.

Substiute Parts

FSB43004A

onsemiIn Stock: 743FSB43004A Datasheet

Current PartRFQ

FSB43004A

Fairchild SemiconductorIn Stock: 3164FSB43004A Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FSB43004A is determined by strict alignment across the following critical parameters:

• Output Configuration: Half Bridge (3) channels
• Interface Type: Parallel control interface
• Technology Platform: Power MOSFET architecture
• Voltage Specifications: Supply range 14.6V ~ 16.5V; Load voltage 20V
• Operating Temperature Range: -40°C ~ 150°C (TJ)
• Package Format: 22-DIP through-hole module
• Motor Application: Brushless DC (BLDC) driver capability
• Functional Integration: Fully integrated control and power stage

The FSB43004A manufactured by Fairchild Semiconductor meets all substitution criteria. Both the onsemi original and Fairchild equivalent share identical electrical specifications, output topology, interface protocol, and physical packaging. The Fairchild variant maintains full pin-for-pin and functional compatibility while offering active product status and improved component availability.

Parameter Comparison

Engineering Selection Recommendations

The Fairchild Semiconductor FSB43004A is the direct equivalent substitute for the obsolete onsemi FSB43004A. Selection of the Fairchild variant is supported by the following engineering factors:

Product Status: The Fairchild part maintains active product status with confirmed inventory availability (3119 units), whereas the onsemi original is obsolete. This ensures long-term supply chain viability and reduces procurement risk.

Compliance & Certifications: Both variants maintain identical REACH compliance status (REACH Unaffected) and export classification (ECCN EAR99). The Fairchild substitute carries RoHS3 compliance certification, providing enhanced environmental and regulatory alignment for modern manufacturing standards.

Electrical & Mechanical Compatibility: Complete parameter alignment across supply voltage, load voltage, operating temperature range, output topology, interface protocol, and package format ensures direct functional substitution without circuit redesign or board-level modifications.

Packaging & Logistics: Both parts utilize identical 22-DIP through-hole packaging. The Fairchild variant is supplied in tube packaging format, maintaining standard handling and storage protocols compatible with existing assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the Fairchild FSB43004A be used as a direct replacement for the onsemi FSB43004A in existing designs?

A: Yes. The Fairchild variant is a direct pin-for-pin and functional equivalent. All electrical parameters, output configuration, interface protocol, and package dimensions are identical. No circuit modifications or board redesign is required.

Q: What are the key substitution criteria for the FSB43004A?

A: Substitution eligibility requires matching across: half-bridge (3-channel) output configuration, parallel control interface, Power MOSFET technology, 14.6V–16.5V supply voltage range, 20V load voltage, -40°C to 150°C operating temperature, 22-DIP through-hole package, and brushless DC motor driver functionality.

Q: Why is the Fairchild FSB43004A preferable to the onsemi original?

A: The Fairchild variant offers active product status with higher inventory availability, RoHS3 compliance certification, and confirmed long-term supply chain support. The onsemi original is classified as obsolete, creating procurement and sustainability risks.

Q: Are there any differences in moisture sensitivity or handling requirements between the two variants?

A: The onsemi original carries MSL 1 (Unlimited) rating, while the Fairchild substitute carries MSL 3 (168 Hours). Both ratings are standard for through-hole DIP packages. The Fairchild MSL 3 specification requires storage in controlled humidity environments and adherence to standard moisture-sensitive device handling protocols during assembly.

Q: What is the HTSUS classification for each variant?

A: The onsemi FSB43004A is classified under HTSUS 8541.29.0095. The Fairchild FSB43004A is classified under HTSUS 8542.39.0001. Both classifications reflect semiconductor component categorization for tariff and trade purposes.

Q: Can the FSB43004A be used in applications other than brushless DC motor control?

A: The FSB43004A is specified for brushless DC (BLDC) motor driver applications. General-purpose motor control applications within the defined voltage and temperature parameters are supported. Application-specific validation is required for non-standard use cases.