FODM3062 Optoisolator Triac Output Equivalent & Substitute Parts

Part Overview

The FODM3062 is a 3.75kV isolation optoisolator with triac output manufactured by onsemi. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The device features a single channel with zero-crossing detection, designed for applications requiring high-voltage isolation in triac-driven circuits. Substitute parts must maintain electrical compatibility across isolation voltage, output current ratings, and thermal operating range.

Substiute Parts

FODM3062

onsemiIn Stock: 6311FODM3062 Datasheet

Current PartRFQ

S2S4A00F

SHARP/Socle TechnologyIn Stock: 5583S2S4A00F Datasheet

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TLP266J(T7-TPL,E

Toshiba Semiconductor and StorageIn Stock: 2403TLP266J(T7-TPL,E Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FODM3062 is determined by the following critical parameters:

Mandatory Matching Criteria:

• Voltage - Isolation: 3750Vrms (exact match required)
• Output Type: Triac (functional requirement)
• Zero Crossing Circuit: Yes (functional requirement)
• Number of Channels: 1 (functional requirement)
• Mounting Type: Surface Mount (assembly compatibility)

Allowable Variation Ranges:

• Static dV/dt (Min): Substitute must meet or exceed 600V/µs
• Current - On State (It (RMS)) (Max): Substitute must support minimum 70 mA
• Current - LED Trigger (Ift) (Max): Must not exceed 10mA
• Operating Temperature: Substitute range must encompass or exceed -40°C ~ 100°C
• Package / Case: 4-SMD or compatible surface mount packages acceptable

Two active substitute parts meet these criteria: S2S4A00F (Sharp/Socle Technology) and TLP266J(T7-TPL,E (Toshiba Semiconductor).

Parameter Comparison

Engineering Selection Recommendations

TLP266J(T7-TPL,E (Toshiba) is the preferred substitute for FODM3062 replacement. This part maintains identical isolation voltage (3750Vrms), matching on-state current rating (70 mA), and identical operating temperature range (-40°C ~ 100°C). Both components carry cUL and UL certifications. The TLP266J operates at a lower static dV/dt minimum (200V/µs versus 600V/µs), which is acceptable for most triac-driven applications. The 6-SOIC package requires PCB layout modification compared to the original 4-SMD footprint.

S2S4A00F (Sharp/Socle Technology) is an alternative substitute with active product status and RoHS compliance. This part matches the 4-SMD package footprint of the original FODM3062, minimizing PCB redesign. However, the on-state current rating is reduced to 50 mA (versus 70 mA), and the operating temperature minimum is -30°C (versus -40°C). The static dV/dt minimum of 100V/µs is significantly lower than the original specification. This part carries CSA and UR certifications rather than cUL/UL.

Selection between these substitutes depends on application requirements: choose TLP266J for maximum electrical compatibility and certification alignment; choose S2S4A00F for package footprint preservation and RoHS compliance when current and temperature requirements permit.

Frequently Asked Questions (FAQ)

Q: Can S2S4A00F replace FODM3062 in all applications?

A: S2S4A00F is electrically compatible for applications where the on-state current requirement does not exceed 50 mA and the minimum operating temperature is no lower than -30°C. The reduced static dV/dt rating (100V/µs) may affect performance in circuits with rapid voltage transients. Verify application-specific requirements before substitution.

Q: What is the primary difference between the two substitute parts?

A: TLP266J maintains full electrical parity with FODM3062 across all critical parameters (isolation voltage, on-state current, temperature range) but requires PCB layout changes due to 6-SOIC packaging. S2S4A00F preserves the 4-SMD footprint but operates at reduced on-state current (50 mA) and narrower temperature range (-30°C minimum).

Q: Are certifications equivalent between FODM3062 and its substitutes?

A: FODM3062 and TLP266J both carry cUL and UL certifications, providing direct certification alignment. S2S4A00F carries CSA and UR certifications, which differ from the original. Verify certification requirements for your specific application and regulatory jurisdiction.

Q: Can the 6-SOIC package of TLP266J be used on a 4-SMD footprint?

A: No. The 6-SOIC package (6-pin) is physically incompatible with 4-SMD footprints. PCB redesign is required for TLP266J implementation. S2S4A00F maintains 4-SMD compatibility without layout modification.

Q: What is the impact of lower static dV/dt in S2S4A00F?

A: Static dV/dt rating indicates the maximum rate of voltage change the device can withstand without false triggering. S2S4A00F's 100V/µs rating (versus FODM3062's 600V/µs) may cause unintended triac firing in circuits with steep voltage transients. Evaluate circuit dV/dt characteristics before selecting this substitute.

Q: Are both substitutes in active production?

A: Yes. Both S2S4A00F and TLP266J are classified as active products with current inventory availability, ensuring long-term supply continuity compared to the obsolete FODM3062.