VO4254D Equivalent & Substitute Parts

Part Overview

The VO4254D is a 5.3kV isolation optoisolator with triac output manufactured by Vishay Semiconductor Opto Division. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The VO4254D provides single-channel triac isolation in a 6-DIP through-hole package, suitable for applications requiring high-voltage isolation with triac switching capability.

Substiute Parts

VO4254D

Vishay Semiconductor Opto DivisionIn Stock: 732VO4254D Datasheet

Current PartRFQ

VO4256D

Vishay Semiconductor Opto DivisionIn Stock: 10309VO4256D 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 VO4254D is determined by the following critical parameters:

Primary 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
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

Secondary Compatibility Criteria:

• Voltage - Isolation: Minimum 5000Vrms (VO4254D specifies 5300Vrms)
• Voltage - Off State: Minimum 400 V
• Current - On State (It (RMS)): Minimum 100 mA
• Current - DC Forward (If): Maximum 60 mA

Substitute parts are grouped into two categories:

Direct Manufacturer Substitute: VO4256D from Vishay maintains identical isolation voltage (5300Vrms) and electrical characteristics with active product status.

Manufacturer-Recommended Substitutes: EL3021, EL3022, and EL3023 from Everlight Electronics provide equivalent functionality with slightly lower isolation voltage (5000Vrms) but maintain all critical package, thermal, and compliance requirements. These parts differ in LED trigger current specifications.

Parameter Comparison

Engineering Selection Recommendations

VO4256D (Vishay): This is the primary direct substitute for the VO4254D. It maintains identical isolation voltage (5300Vrms), identical electrical characteristics, and identical package specifications. VO4256D holds active product status with established supply availability. This part is suitable for direct replacement in all applications where VO4254D was originally specified. Approval agencies include cUR, FIMKO, and UR.

EL3021, EL3022, EL3023 (Everlight): These parts provide functional equivalence with the following considerations: isolation voltage is 5000Vrms compared to 5300Vrms on the VO4254D, representing a 5.7% reduction. All three Everlight parts maintain the required 6-DIP package, through-hole mounting, and operating temperature range. The primary difference among the three Everlight options is LED trigger current: EL3021 specifies 15mA maximum, EL3022 specifies 10mA maximum, and EL3023 specifies 5mA maximum. All three hold active product status with higher inventory availability than VO4256D. Approval agencies include CSA, DEMKO, FIMKO, NEMKO, SEMKO, and UL.

Selection between VO4256D and Everlight alternatives depends on isolation voltage requirements. Applications requiring 5300Vrms isolation must use VO4256D. Applications tolerant of 5000Vrms isolation may use Everlight parts. LED trigger current selection among Everlight options depends on input circuit design requirements.

Frequently Asked Questions (FAQ)

Q: Can VO4256D be used as a direct replacement for VO4254D?

A: Yes. VO4256D is the direct manufacturer substitute from Vishay. It maintains identical isolation voltage (5300Vrms), identical triac output characteristics, identical 6-DIP package, and identical operating temperature range. The primary difference is product status: VO4254D is obsolete while VO4256D is active.

Q: What is the key difference between VO4254D and the Everlight EL302x series?

A: The primary difference is isolation voltage. VO4254D specifies 5300Vrms isolation, while EL3021, EL3022, and EL3023 specify 5000Vrms isolation. All other critical parameters including package, mounting type, operating temperature, and triac output characteristics are compatible. The Everlight parts also differ in LED trigger current specifications.

Q: Which Everlight part should I select: EL3021, EL3022, or EL3023?

A: Selection depends on input circuit requirements. EL3023 requires the lowest LED trigger current (5mA maximum), EL3022 requires 10mA maximum, and EL3021 requires 15mA maximum. Choose the part that best matches your input drive circuit design. All three maintain identical isolation voltage, package, and output characteristics.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. VO4254D, VO4256D, EL3021, EL3022, and EL3023 are all ROHS3 compliant with MSL rating of 1 (Unlimited).

Q: What approval agencies certify these optoisolators?

A: VO4254D and VO4256D carry cUR, FIMKO, and UR approvals. EL3021, EL3022, and EL3023 carry CSA, DEMKO, FIMKO, NEMKO, SEMKO, and UL approvals. Application requirements may dictate which certifications are necessary.

Q: Can I use an Everlight part if my application requires 5300Vrms isolation?

A: No. Everlight EL302x series parts specify 5000Vrms isolation, which is below the 5300Vrms requirement. For applications requiring 5300Vrms isolation, use VO4256D.

Q: Are the package dimensions identical across all substitute parts?

A: Yes. All parts use 6-DIP (0.300", 7.62mm) through-hole package with identical pin configuration and PCB footprint compatibility.