FODB102V Equivalent & Substitute Parts

Part Overview

The FODB102V is an optoisolator with transistor output manufactured by onsemi, designed for applications requiring galvanic isolation up to 2500Vrms. This component features a single channel configuration in a 4-BGA package and is part of the Microcoupler™ series. The product is currently obsolete, making identification of compatible substitute parts essential for ongoing system support and new design implementations.

Substiute Parts

FODB102V

onsemiIn Stock: 17284FODB102V Datasheet

Current PartRFQ

FODM8801CV

onsemiIn Stock: 1054FODM8801CV Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the FODB102V is determined by the following critical parameters:

• Single Channel Configuration: The substitute must maintain 1 channel output to preserve circuit topology
• Transistor Output Type: Output stage must be transistor-based for direct functional replacement
• Isolation Voltage: Minimum 2500Vrms isolation capability required; higher isolation ratings are acceptable
• Output Voltage Rating: Maximum output voltage of 75V or greater
• Output Current Capability: Minimum 30mA per channel; the original 50mA specification may be exceeded
• Operating Temperature Range: Must support -40°C to 125°C minimum
• Surface Mount Configuration: Package must be surface mount compatible

The FODM8801CV qualifies as a substitute based on these parameters, with enhanced isolation voltage (3750Vrms) and improved current transfer ratio characteristics.

Parameter Comparison

Engineering Selection Recommendations

The FODM8801CV is a qualified substitute for the obsolete FODB102V based on functional and electrical compatibility. Key considerations:

Advantages of FODM8801CV:

• Active product status ensures long-term availability and supply chain stability
• Higher isolation voltage (3750Vrms vs 2500Vrms) provides additional safety margin
• Improved current transfer ratio (200% minimum vs 100% minimum) enhances signal integrity
• RoHS3 compliance and REACH unaffected status align with modern regulatory requirements

Design Considerations:

• Output current rating is reduced from 50mA to 30mA; applications requiring higher output current must be re-evaluated
• Package change from 4-TEBGA to 4-SOIC requires PCB layout modification and footprint redesign
• Timing characteristics differ slightly; verify turn-on/turn-off and rise/fall times meet application requirements

Compliance Status:

• FODM8801CV: RoHS3 Compliant, REACH Unaffected, ECCN EAR99
• FODB102V: REACH Unaffected, ECCN EAR99

Frequently Asked Questions (FAQ)

Q: Can FODM8801CV directly replace FODB102V without PCB modification?

A: No. The package change from 4-TEBGA to 4-SOIC requires PCB footprint redesign. Pin configuration and physical dimensions differ, necessitating layout changes.

Q: Is the reduced output current (30mA vs 50mA) a limitation?

A: This depends on application requirements. If the circuit draws less than 30mA from the optoisolator output, the FODM8801CV is suitable. Applications requiring 30-50mA output current must be re-evaluated or alternative parts considered.

Q: What are the timing differences between these parts?

A: FODB102V specifies 3µs turn-on and 5µs turn-off time. FODM8801CV specifies 6µs for both. Rise/fall times also differ (1µs/5µs vs 5µs/5.5µs). Verify these timing parameters against application requirements.

Q: Does the higher isolation voltage of FODM8801CV affect compatibility?

A: Higher isolation voltage is beneficial and does not create compatibility issues. It provides additional safety margin without negative functional impact.

Q: Are there RoHS or regulatory differences?

A: FODM8801CV is RoHS3 compliant, while FODB102V status is not specified. Both are REACH unaffected and ECCN EAR99. FODM8801CV meets current regulatory standards.

Q: What is the current transfer ratio difference?

A: FODB102V guarantees 100% minimum CTR at 1mA. FODM8801CV guarantees 200-400% CTR at 1mA. Higher CTR improves signal transmission efficiency and noise immunity.