SFH619A-X009TO Equivalent & Substitute Parts

Part Overview

The SFH619A-X009TO is a Darlington output optoisolator manufactured by Vishay Semiconductor Opto Division, designed for high-voltage isolation applications requiring 5300Vrms isolation rating. This component features a single channel configuration in a 4-SMD surface mount package with Gull Wing leads. The part is currently classified as obsolete, making identification of functional equivalents essential for ongoing design support and production continuity. Substitute parts must maintain electrical and mechanical compatibility while meeting isolation voltage, output current, and thermal operating requirements.

Substiute Parts

SFH619A-X009TO

Vishay Semiconductor Opto DivisionIn Stock: 1028SFH619A-X009TO Datasheet

Current PartRFQ

SFH619A-X007T

Vishay Semiconductor Opto DivisionIn Stock: 1921SFH619A-X007T Datasheet

Parametric EquivalentRFQ

SFH619A-X009T

Vishay Semiconductor Opto DivisionIn Stock: 2486SFH619A-X009T Datasheet

Parametric EquivalentRFQ

FOD8523SD

onsemiIn Stock: 12817FOD8523SD Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SFH619A-X009TO is determined by the following critical parameters:

Primary Compatibility Criteria:

• Isolation voltage rating of 5300Vrms or higher
• Single channel Darlington output configuration
• Maximum output voltage of 300V or greater
• Output current capability of 125mA or greater
• 4-SMD surface mount package with Gull Wing leads
• Operating temperature range encompassing -55°C to 100°C
• Current transfer ratio minimum of 1000% @ 1mA

Substitute Categories:

Parametric Equivalents (Vishay SFH619 Series): SFH619A-X007T and SFH619A-X009T are direct parametric equivalents from the same manufacturer and product series. These parts maintain identical electrical specifications and differ only in packaging format (Cut Tape vs. Tape & Reel). Both are active products, providing long-term availability advantages over the obsolete main part.

Manufacturer Recommended Equivalent (onsemi FOD8523SD): The FOD8523SD is designated as a manufacturer-recommended substitute. While it maintains core functional compatibility, it operates at 5000Vrms isolation voltage (300Vrms lower than the main part) and features enhanced current transfer ratio range (1000%-15000% @ 1mA). Output current capability is 150mA, exceeding the main part requirement. Operating temperature range is -30°C to 100°C, which does not extend to the lower -55°C specification of the main part.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Preferred):

SFH619A-X007T and SFH619A-X009T are the primary substitutes for the obsolete SFH619A-X009TO. Both parts are active products from Vishay Semiconductor Opto Division and maintain complete electrical and mechanical compatibility. Selection between these two depends on packaging requirements: SFH619A-X007T is supplied in Cut Tape format with Digi-Reel packaging, while SFH619A-X009T is supplied in Tape & Reel format. Both achieve ROHS3 compliance and REACH unaffected status. Current inventory levels support production continuity (1900 units and 2450 units respectively).

For Applications with Extended Temperature Requirements:

The FOD8523SD from onsemi is suitable only for applications where the lower operating temperature limit of -30°C (rather than -55°C) is acceptable. This part provides enhanced current transfer ratio range and higher output current capability (150mA vs. 125mA), which may benefit designs with marginal current budgets. The 300Vrms reduction in isolation voltage (5000Vrms vs. 5300Vrms) must be evaluated against circuit isolation requirements. FOD8523SD maintains ROHS3 compliance and REACH unaffected status with substantial inventory availability (12770 units).

Frequently Asked Questions (FAQ)

Q: Can SFH619A-X007T or SFH619A-X009T be used as direct drop-in replacements for SFH619A-X009TO?

A: Yes. Both parts are parametric equivalents with identical electrical specifications and 4-SMD Gull Wing package configuration. The only difference is packaging format (Cut Tape vs. Tape & Reel). No circuit modifications are required.

Q: What is the difference between SFH619A-X007T and SFH619A-X009T?

A: Both parts are electrically identical. SFH619A-X007T is supplied in Cut Tape (CT) & Digi-Reel format, while SFH619A-X009T is supplied in Tape & Reel (TR) format. Selection depends on assembly line equipment compatibility and inventory management preferences.

Q: Can FOD8523SD replace SFH619A-X009TO in all applications?

A: FOD8523SD is suitable only for applications where the operating temperature range of -30°C to 100°C is acceptable. Applications requiring operation below -30°C must use SFH619A-X007T or SFH619A-X009T. Additionally, the 300Vrms lower isolation voltage rating must be evaluated against circuit requirements.

Q: Are all substitute parts RoHS and REACH compliant?

A: Yes. SFH619A-X007T, SFH619A-X009T, and FOD8523SD are all ROHS3 compliant and REACH unaffected, matching the compliance status of the main part.

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

A: All parts listed (main and substitutes) have Moisture Sensitivity Level 1 (Unlimited), indicating no moisture sensitivity precautions are required during storage or handling.

Q: Which substitute offers the best long-term availability?

A: SFH619A-X007T and SFH619A-X009T are active products from Vishay with established production status. FOD8523SD is also active from onsemi. All three provide superior long-term availability compared to the obsolete SFH619A-X009TO.