VO4254M Equivalent & Substitute Parts

Part Overview

The VO4254M is a 5.3kV isolation optoisolator with triac output manufactured by Vishay Semiconductor Opto Division in a 6-DIP through-hole package. This component is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements. The part provides galvanic isolation for AC switching applications with a single triac output channel and 5300Vrms isolation voltage rating.

Substiute Parts

VO4254M

Vishay Semiconductor Opto DivisionIn Stock: 1119VO4254M Datasheet

Current PartRFQ

VO4256M

Vishay Semiconductor Opto DivisionIn Stock: 755VO4256M Datasheet

DirectRFQ

EL3021

Everlight Electronics Co LtdIn Stock: 66589EL3021 Datasheet

MFR RecommendedRFQ

EL3022

Everlight Electronics Co LtdIn Stock: 24994EL3022 Datasheet

MFR RecommendedRFQ

EL3023

Everlight Electronics Co LtdIn Stock: 83402EL3023 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the VO4254M is determined by the following critical parameters:

Mandatory Compatibility Criteria:

• Output Type: Triac
• Number of Channels: 1
• Package / Case: 6-DIP (0.300", 7.62mm)
• Mounting Type: Through Hole
• Operating Temperature Range: -55°C ~ 100°C
• Isolation Voltage: Minimum 5000Vrms (VO4254M specifies 5300Vrms)
• Voltage - Off State: Minimum 400 V
• RoHS Status: ROHS3 Compliant

Substitute Parts Identified:

1. VO4256M (Vishay Semiconductor Opto Division) - Direct manufacturer alternative with active product status
2. EL3021 (Everlight Electronics Co Ltd) - Manufacturer-recommended substitute
3. EL3022 (Everlight Electronics Co Ltd) - Manufacturer-recommended substitute
4. EL3023 (Everlight Electronics Co Ltd) - Manufacturer-recommended substitute

All substitute parts meet the mandatory compatibility criteria and maintain the same package footprint and isolation voltage class.

Parameter Comparison

Engineering Selection Recommendations

VO4256M is the primary direct substitute from Vishay Semiconductor Opto Division. This part maintains identical isolation voltage (5300Vrms), off-state voltage (600V), static dV/dt rating (5kV/µs), on-state current (300mA), and LED trigger current (3mA) specifications. VO4256M holds active product status, ensuring long-term availability and supply chain continuity. The part carries equivalent regulatory approvals (cUR, FIMKO, UR) and ROHS3 compliance.

EL3021, EL3022, and EL3023 from Everlight Electronics Co Ltd are manufacturer-recommended alternatives with active product status. These parts meet the isolation voltage requirement at 5000Vrms and maintain the same package footprint and operating temperature range. Key differences include reduced on-state current (100mA versus 300mA) and lower static dV/dt rating (100V/µs typical versus 5kV/µs). The Everlight series offers broader regulatory approvals (CSA, DEMKO, FIMKO, NEMKO, SEMKO, UL) and higher inventory availability. Selection among EL3021, EL3022, and EL3023 depends on LED trigger current requirements: EL3021 (15mA max), EL3022 (10mA max), or EL3023 (5mA max).

Frequently Asked Questions (FAQ)

Q: Can VO4256M directly replace VO4254M in existing designs?

A: Yes. VO4256M maintains identical electrical specifications for isolation voltage, off-state voltage, static dV/dt, on-state current, and LED trigger current. The 6-DIP package footprint is identical, enabling direct PCB substitution without layout modifications.

Q: What are the key differences between Vishay and Everlight substitutes?

A: VO4256M preserves all VO4254M electrical specifications. Everlight parts (EL3021, EL3022, EL3023) reduce isolation voltage to 5000Vrms, on-state current to 100mA, and static dV/dt to 100V/µs typical. These differences require circuit evaluation for applications demanding the full 5300Vrms isolation or 300mA on-state current of the original part.

Q: How do I select between EL3021, EL3022, and EL3023?

A: Selection is based on LED trigger current requirements. EL3023 requires the lowest trigger current (5mA max), followed by EL3022 (10mA max) and EL3021 (15mA max). Choose the part matching your input drive circuit specifications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. VO4256M, EL3021, EL3022, and EL3023 all carry ROHS3 compliance certification with MSL rating of 1 (Unlimited).

Q: What regulatory approvals do substitute parts carry?

A: VO4256M carries cUR, FIMKO, and UR approvals. Everlight parts (EL3021, EL3022, EL3023) carry CSA, DEMKO, FIMKO, NEMKO, SEMKO, and UL approvals, providing broader international certification coverage.

Q: Is the 6-DIP package identical across all parts?

A: Yes. All substitute parts use the 6-DIP (0.300", 7.62mm) through-hole package with identical pin spacing and mounting requirements.