FOD420V Equivalent & Substitute Parts

Part Overview

The FOD420V is an optoisolator with triac output manufactured by onsemi, designed for high-voltage isolation applications requiring 5000Vrms isolation rating. This 6-DIP through-hole component provides galvanic isolation for AC switching circuits with a single triac output channel. The part is active in production status with full RoHS3 compliance and international approvals (cUL, FIMKO, UL, VDE). Equivalent and substitute parts are identified for applications requiring alternative sourcing, extended lead times, or specific performance characteristics within compatible electrical and mechanical parameters.

Substiute Parts

FOD420V

onsemiIn Stock: 1259FOD420V Datasheet

Current PartRFQ

FOD420

onsemiIn Stock: 6010FOD420 Datasheet

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IL420-X001

Vishay Semiconductor Opto DivisionIn Stock: 1672IL420-X001 Datasheet

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MOC3052

Lite-On Inc.In Stock: 130136MOC3052 Datasheet

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VO3052-X016

Vishay Semiconductor Opto DivisionIn Stock: 2899VO3052-X016 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the FOD420V are grouped based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

• Output Type: Triac (all substitutes maintain triac output)
• Number of Channels: 1 (single channel isolation)
• Mounting Type: Through Hole (PCB assembly compatibility)
• Package / Case: 6-DIP form factor (pin count and spacing)
• Voltage - Isolation: Minimum 5000Vrms (equal or higher isolation rating)
• Voltage - Off State: 600 V (triac blocking voltage)
• Operating Temperature Range: -55°C to 100°C (thermal compatibility)

Substitutes are organized into two categories:

1. Direct Equivalent (FOD420): Identical electrical specifications and isolation rating from the same manufacturer.

2. Enhanced Performance Substitutes (IL420-X001, VO3052-X016): Higher isolation voltage (5300Vrms) with improved static dV/dt performance, suitable for applications requiring additional margin.

3. Alternative Manufacturer Substitute (MOC3052): Equivalent isolation rating with different input trigger current and hold current specifications, from established alternative source.

Parameter Comparison

Engineering Selection Recommendations

FOD420 (onsemi): Direct equivalent to FOD420V with identical electrical specifications and isolation rating. Recommended as primary substitute when FOD420V availability is limited. Maintains all performance characteristics and certifications (cUL, FIMKO, UL). Suitable for direct board-level replacement without design modification.

IL420-X001 (Vishay Semiconductor Opto Division): Provides enhanced isolation voltage (5300Vrms) and faster turn-on time (35µs vs. 60µs). Maintains 10kV/µs static dV/dt performance. Approved by CQC, CSA, cUR, UR, VDE. Recommended for applications requiring higher isolation margin or faster switching response. Pin-compatible in standard 6-DIP (0.300", 7.62mm) package.

MOC3052 (Lite-On Inc.): Equivalent 5000Vrms isolation rating with higher LED trigger current requirement (10mA vs. 2mA). Lower static dV/dt rating (1kV/µs). Approved by CSA, FIMKO, UL. Suitable for applications where input drive capability is not constrained. Operating temperature minimum of -40°C (vs. -55°C) limits use in extended low-temperature environments.

VO3052-X016 (Vishay Semiconductor Opto Division): Enhanced isolation voltage (5300Vrms) with lower hold current (200µA typical). Package dimensions differ (0.400", 10.16mm vs. 0.300", 7.62mm), requiring PCB layout verification for pin spacing compatibility. Approved by cUR, UR, VDE. Recommended only when package dimension change is acceptable.

Frequently Asked Questions (FAQ)

Q: Can FOD420 be used as a direct replacement for FOD420V?

A: Yes. FOD420 is the base product number for FOD420V and maintains identical electrical specifications, isolation voltage, output type, and package dimensions. Both are manufactured by onsemi with equivalent certifications.

Q: What is the key difference between FOD420V and IL420-X001?

A: IL420-X001 provides higher isolation voltage (5300Vrms vs. 5000Vrms) and faster turn-on time (35µs vs. 60µs). Both maintain 10kV/µs static dV/dt performance and are pin-compatible in the 6-DIP (0.300", 7.62mm) package. IL420-X001 is suitable when additional isolation margin is required.

Q: Is MOC3052 compatible with FOD420V in all applications?

A: MOC3052 maintains equivalent 5000Vrms isolation and triac output, but differs in input trigger current (10mA vs. 2mA) and static dV/dt (1kV/µs vs. 10kV/µs). Applications with limited input drive capability or requiring high dV/dt immunity should not use MOC3052 as a substitute. Operating temperature range is also reduced (-40°C to 100°C vs. -55°C to 100°C).

Q: Why does VO3052-X016 have a different package dimension?

A: VO3052-X016 uses a 6-DIP (0.400", 10.16mm) package versus the standard 6-DIP (0.300", 7.62mm) for FOD420V. This larger pitch requires PCB layout verification to confirm pin spacing compatibility before substitution.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. FOD420, IL420-X001, MOC3052, and VO3052-X016 are all ROHS3 compliant with REACH Unaffected status.

Q: Which substitute offers the best performance improvement?

A: IL420-X001 provides the most direct performance enhancement with higher isolation voltage (5300Vrms), faster turn-on time (35µs), and maintains the high static dV/dt rating (10kV/µs) of the original FOD420V. Pin-compatible in the standard 6-DIP (0.300", 7.62mm) package.