H11AA4TM Equivalent & Substitute Parts

Part Overview

The H11AA4TM is an optoisolator transistor with base output manufactured by onsemi, designed for high-voltage isolation applications. This component features 4170Vrms isolation voltage, single-channel configuration, and 6-DIP through-hole packaging. The part is currently classified as obsolete, making identification of equivalent and substitute components essential for ongoing design support and production continuity.

Substiute Parts

H11AA4TM

onsemiIn Stock: 12427H11AA4TM Datasheet

Current PartRFQ

H11AA4TVM

onsemiIn Stock: 2102H11AA4TVM Datasheet

Parametric EquivalentRFQ

H11AA1-X006

Vishay Semiconductor Opto DivisionIn Stock: 2649H11AA1-X006 Datasheet

SimilarRFQ

H11AA4G

Isocom Components 2004 LTDIn Stock: 1043H11AA4G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the H11AA4TM is determined by the following critical parameters: isolation voltage rating, number of channels, output type (transistor with base), maximum output voltage, output current capability, saturation voltage, operating temperature range, and physical package dimensions.

Parametric Equivalent Classification: Parts meeting all critical electrical and mechanical specifications with identical or superior performance characteristics.

Similar Classification: Parts with comparable functionality but variations in one or more key parameters that may require circuit evaluation before substitution.

The H11AA4TM substitutes list includes H11AA4TVM (parametric equivalent) and H11AA1-X006 and H11AA4G (similar alternatives), each with distinct compliance and availability profiles.

Parameter Comparison

Engineering Selection Recommendations

H11AA4TVM (Parametric Equivalent): This onsemi component is the primary replacement for the H11AA4TM. It maintains identical electrical specifications including 4170Vrms isolation voltage, 100% current transfer ratio at 10mA, 30V maximum output voltage, and 50mA output current. The H11AA4TVM is active in production status and ROHS3 compliant, providing direct compatibility with existing designs. Packaging dimensions are identical (6-DIP 0.400", 10.16mm). This part is recommended as the first-choice substitute.

H11AA1-X006 (Similar Alternative): This Vishay component offers higher isolation voltage (5300Vrms) and extended lower operating temperature (-55°C minimum). However, it features reduced current transfer ratio (20% @ 10mA) and different package dimensions (6-DIP 0.300", 7.62mm). Selection requires verification that the lower current transfer ratio and smaller package footprint are compatible with the application circuit. This part is suitable for applications requiring enhanced isolation voltage margin.

H11AA4G (Similar Alternative): This Isocom component maintains 100% current transfer ratio and 50mA output current matching the original part. It offers slightly higher maximum output voltage (35V) and is ROHS3 compliant. However, the isolation voltage specification (7.5Vpk) differs significantly from the original 4170Vrms rating, and the operating temperature range is narrower (-30°C minimum). This part is applicable only in applications where the lower isolation voltage requirement is acceptable.

Frequently Asked Questions (FAQ)

Q: Can H11AA4TVM be used as a direct replacement for H11AA4TM?

A: Yes. The H11AA4TVM is a parametric equivalent with identical isolation voltage (4170Vrms), current transfer ratio (100% @ 10mA), output voltage (30V max), output current (50mA), saturation voltage (400mV), operating temperature range (-40°C to 100°C), and package dimensions (6-DIP 0.400", 10.16mm). No circuit modifications are required.

Q: What are the key differences between H11AA1-X006 and the original H11AA4TM?

A: The H11AA1-X006 has higher isolation voltage (5300Vrms vs. 4170Vrms), lower current transfer ratio (20% vs. 100% @ 10mA), different package dimensions (6-DIP 0.300" vs. 0.400"), and extended lower operating temperature (-55°C vs. -40°C). Circuit evaluation is necessary before substitution.

Q: Is the H11AA4G suitable for all applications using H11AA4TM?

A: No. The H11AA4G has significantly different isolation voltage specification (7.5Vpk vs. 4170Vrms) and narrower operating temperature range (-30°C to 100°C vs. -40°C to 100°C). Substitution is only appropriate for applications where these parameter differences are acceptable.

Q: What is the impact of package dimension differences between H11AA1-X006 and H11AA4TM?

A: The H11AA1-X006 uses 6-DIP 0.300" (7.62mm) spacing versus the original 6-DIP 0.400" (10.16mm). This smaller footprint may require PCB layout modifications and verification of mechanical clearance in the application assembly.

Q: Are all substitute parts ROHS3 compliant?

A: H11AA4TVM and H11AA4G are ROHS3 compliant. H11AA1-X006 is ROHS3 compliant. All three substitutes meet current environmental compliance requirements.

Q: Which substitute part has the best availability?

A: H11AA4TVM (onsemi) has 2034 units in stock. H11AA1-X006 (Vishay) has 2579 units. H11AA4G (Isocom) has 984 units. Availability should be confirmed with your component supplier for current production requirements.