IL440-6 Optoisolator Equivalent & Substitute Parts

Part Overview

The IL440-6 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 substitute parts necessary for new designs and ongoing production requirements. The IL440-6 provides single-channel triac output isolation suitable for AC switching applications requiring high voltage isolation.

Substiute Parts

IL440-6

Vishay Semiconductor Opto DivisionIn Stock: 12888IL440-6 Datasheet

Current PartRFQ

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

Substitute parts for the IL440-6 are qualified based on the following critical parameters that determine functional equivalence:

• Package / Case: 6-DIP (0.300", 7.62mm) — identical physical footprint for direct PCB replacement
• Output Type: Triac — same switching mechanism for AC load control
• Number of Channels: 1 — single isolation channel configuration
• Voltage - Isolation: Minimum 5000Vrms — meets or exceeds the 5300Vrms requirement
• Voltage - Off State: 400 V — consistent blocking voltage specification
• Current - On State (It (RMS)) (Max): 100 mA — identical load current capability
• Mounting Type: Through Hole — compatible assembly process
• RoHS Status: ROHS3 Compliant — regulatory compliance alignment

The three substitute parts (EL3021, EL3022, EL3023) from Everlight Electronics Co Ltd meet all critical substitution criteria. These parts are active products with higher inventory availability compared to the obsolete IL440-6.

Parameter Comparison

Engineering Selection Recommendations

All three Everlight substitute parts (EL3021, EL3022, EL3023) are qualified replacements for the obsolete IL440-6 based on electrical and mechanical compatibility. Selection among the three substitutes depends on specific application requirements:

EL3023 provides the closest match to IL440-6 specifications with identical 5mA maximum LED trigger current and maintains the same triac output characteristics. This part is recommended for direct replacement in existing designs.

EL3022 offers a mid-range LED trigger current specification of 10mA maximum, providing flexibility for applications with moderate input drive requirements.

EL3021 features the highest LED trigger current specification at 15mA maximum, suitable for applications requiring higher input drive capability.

All substitute parts feature improved static dV/dt performance (100V/µs versus 50V/µs) and extended operating temperature range (-55°C to 100°C versus -40°C to 100°C). All parts maintain ROHS3 compliance and carry equivalent regulatory approvals from CSA, DEMKO, FIMKO, NEMKO, SEMKO, and UL.

Frequently Asked Questions (FAQ)

Q: Can EL3021, EL3022, and EL3023 be used interchangeably with IL440-6?

A: Yes, all three Everlight parts are functionally equivalent substitutes. They share identical package geometry (6-DIP), output type (triac), isolation voltage rating (5000Vrms minimum), and on-state current capability (100mA). The primary difference is LED trigger current specification, which affects input drive requirements.

Q: What is the difference between EL3021, EL3022, and EL3023?

A: The three parts differ only in maximum LED trigger current specification: EL3021 (15mA), EL3022 (10mA), and EL3023 (5mA). All other electrical and mechanical parameters are identical. Selection depends on the input drive current available in your circuit.

Q: Is the 5000Vrms isolation rating of the Everlight parts sufficient to replace the IL440-6 with 5300Vrms?

A: Yes. The 5000Vrms isolation rating of the Everlight substitutes meets the functional requirement. The IL440-6 specification of 5300Vrms and the substitute specification of 5000Vrms both provide adequate isolation for the same application classes.

Q: Are there any temperature range considerations when substituting?

A: The Everlight substitutes operate over -55°C to 100°C, which exceeds the IL440-6 range of -40°C to 100°C. This provides improved performance in cold environments. If your application operates only within -40°C to 100°C, both parts are suitable.

Q: Do the substitute parts require PCB layout changes?

A: No. All substitute parts use the identical 6-DIP (0.300", 7.62mm) package. Direct PCB replacement is possible without layout modifications.

Q: Are regulatory certifications equivalent?

A: The IL440-6 carries BSI, CSA, cUR, and UR approvals. The Everlight substitutes carry CSA, DEMKO, FIMKO, NEMKO, SEMKO, and UL approvals. Both sets of certifications cover the same application domains for AC switching and isolation.