OPIA404BTRE Equivalent & Substitute Parts

Part Overview

The OPIA404BTRE is a 3.75kV isolation optoisolator with transistor output manufactured by TT Electronics/Optek Technology. This component features a single channel configuration in a 4-SOP surface mount package and is designed for applications requiring galvanic isolation with DC input and transistor output switching capability. The product is currently classified as obsolete, making identification of compatible substitute components essential for ongoing system support and new design implementations.

Substiute Parts

OPIA404BTRE

TT Electronics/Optek TechnologyIn Stock: 969OPIA404BTRE Datasheet

Current PartRFQ

SFH690ABT

Vishay Semiconductor Opto DivisionIn Stock: 9310SFH690ABT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the OPIA404BTRE is determined by strict equivalence across the following critical parameters:

• Isolation voltage rating of 3750Vrms minimum
• Single channel configuration with transistor output
• DC input type
• 4-SOP (2.54mm) surface mount package with gull wing leads
• Current transfer ratio minimum of 50% @ 5mA
• Maximum output current of 50mA
• RoHS3 compliance and REACH unaffected status

The SFH690ABT from Vishay Semiconductor Opto Division meets all mandatory substitution criteria. Both components share identical isolation voltage, channel count, input/output types, package configuration, and regulatory compliance status. Differences in maximum current transfer ratio, output voltage rating, and operating temperature range represent parameter variations within acceptable substitution boundaries for this component category.

Parameter Comparison

Engineering Selection Recommendations

The SFH690ABT is the qualified substitute for the obsolete OPIA404BTRE. Both components maintain identical isolation voltage specifications, package geometry, and regulatory compliance certifications. The SFH690ABT offers the advantage of active product status with higher current availability, ensuring long-term supply chain viability.

Design considerations for substitution include the SFH690ABT's reduced maximum operating temperature (100°C versus 115°C) and lower maximum current transfer ratio (300% versus 600%). Applications operating at temperatures above 100°C or requiring current transfer ratios exceeding 300% @ 5mA require circuit-level evaluation. The SFH690ABT's higher maximum output voltage rating (70V versus 60V) provides additional design margin in isolation applications.

Frequently Asked Questions (FAQ)

Q: Can the SFH690ABT directly replace the OPIA404BTRE in existing designs?

A: The SFH690ABT is pin-compatible and functionally equivalent for applications within its specified operating parameters. The 4-SOP (2.54mm) package geometry and gull wing lead configuration are identical. Designs operating within the SFH690ABT's maximum temperature of 100°C and current transfer ratio specifications require no circuit modifications.

Q: What are the key differences between these components?

A: The primary differences are product status (obsolete versus active), maximum current transfer ratio (600% versus 300% @ 5mA), maximum output voltage (60V versus 70V), and maximum operating temperature (115°C versus 100°C). All other electrical and mechanical parameters remain equivalent.

Q: Are both components RoHS and REACH compliant?

A: Both the OPIA404BTRE and SFH690ABT are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component manufacturing and use.

Q: What is the moisture sensitivity level for these optoisolators?

A: Both components have a Moisture Sensitivity Level (MSL) of 1, indicating unlimited shelf life without moisture control requirements during storage and handling.

Q: How do the current transfer ratios compare?

A: The OPIA404BTRE specifies a minimum of 50% and maximum of 600% @ 5mA. The SFH690ABT specifies a minimum of 50% and maximum of 300% @ 5mA. Both meet the 50% minimum threshold. Applications requiring current transfer ratios above 300% must use the OPIA404BTRE or evaluate alternative component families.