H11AA2VM Optoisolator Equivalent & Substitute Parts

Part Overview

The H11AA2VM is a 7500Vpk optoisolator transistor with base output in 6-DIP packaging, manufactured by onsemi. This component provides galvanic isolation for AC and DC input signals with a single transistor output channel. The H11AA2VM is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain compatibility across isolation voltage, output configuration, package type, and thermal operating range.

Substiute Parts

H11AA2VM

onsemiIn Stock: 12229H11AA2VM Datasheet

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H11AA1VM

onsemiIn Stock: 12167H11AA1VM Datasheet

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H11AA1

Quality TechnologiesIn Stock: 15777H11AA1 Datasheet

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H11AA1-X001

Vishay Semiconductor Opto DivisionIn Stock: 2209H11AA1-X001 Datasheet

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H11AA2

Fairchild SemiconductorIn Stock: 6959H11AA2 Datasheet

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IL250

Vishay Semiconductor Opto DivisionIn Stock: 16811IL250 Datasheet

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IL252

Vishay Semiconductor Opto DivisionIn Stock: 9815IL252 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the H11AA2VM is determined by the following critical parameters:

• Package / Case: All substitutes must use 6-DIP (0.300", 7.62mm) through-hole packaging for direct PCB compatibility
• Output Type: All substitutes must provide transistor with base output configuration
• Number of Channels: Single channel operation required
• Input Type: AC and DC input capability required
• Operating Temperature Range: Must support -40°C minimum and 100°C maximum
• Voltage - Isolation: Minimum 7500Vpk isolation voltage (or equivalent Vrms rating) required for functional equivalence
• Vce Saturation (Max): Must not exceed 400mV
• Current - Output / Channel: Must support 50mA minimum output current

The substitute parts identified below meet these core compatibility criteria. Differences in Current Transfer Ratio, Voltage - Output (Max), and product status reflect manufacturing variations and availability across different suppliers.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Active Product Status)

H11AA1VM (onsemi) and IL252 (Vishay Semiconductor Opto Division) are the preferred substitutes for new designs. Both parts are active products with current manufacturing support. H11AA1VM maintains onsemi sourcing continuity, while IL252 offers the highest Current Transfer Ratio (100% @ 10mA) among available options. Both support the required 6-DIP package, transistor with base output, and -40°C to 100°C operating range.

Secondary Substitutes (Active Product Status)

H11AA1-X001 (Vishay Semiconductor Opto Division) and IL250 (Vishay Semiconductor Opto Division) are active alternatives. H11AA1-X001 provides 5300Vrms isolation with extended temperature range (-55°C to 100°C). IL250 offers 50% Current Transfer Ratio with equivalent isolation voltage. Both maintain full 6-DIP package compatibility.

H11AA1 (Quality Technologies) is an active product with 20% Current Transfer Ratio and standard operating temperature range. Isolation voltage is not specified for this part.

Obsolete Alternatives (Not Recommended for New Designs)

H11AA2 (Fairchild Semiconductor) is classified as obsolete. While it provides 5000Vrms isolation and 10% Current Transfer Ratio matching the H11AA2VM, its discontinued status makes it unsuitable for production applications requiring long-term supply assurance.

Compliance Considerations

All active substitute parts are ROHS3 compliant and REACH unaffected. The H11AA2VM does not specify RoHS status. Designs transitioning from H11AA2VM to active substitutes benefit from improved regulatory compliance documentation.

Frequently Asked Questions (FAQ)

Q: Can H11AA1VM directly replace H11AA2VM in existing designs?

A: H11AA1VM shares the same 6-DIP package, transistor with base output, and operating temperature range as H11AA2VM. However, H11AA1VM provides 4170Vrms isolation compared to H11AA2VM's 7500Vpk isolation. Direct substitution is valid only if the application does not require isolation voltage exceeding 4170Vrms. Circuit validation is necessary to confirm isolation requirements.

Q: What is the difference between Vpk and Vrms isolation ratings?

A: Vpk (peak voltage) and Vrms (root mean square voltage) are different measurement standards for isolation voltage. 7500Vpk is approximately equivalent to 5300Vrms. Substitutes rated at 5300Vrms provide lower isolation than the H11AA2VM's 7500Vpk rating. Applications requiring the full 7500Vpk isolation specification cannot use lower-rated substitutes.

Q: Why do some substitute parts not specify Current - Output / Channel?

A: Current - Output / Channel specifications are not provided for all substitute parts in the available data. H11AA1VM and H11AA1 explicitly specify 50mA output current, matching the H11AA2VM requirement. For parts without specified output current, contact the manufacturer to confirm 50mA minimum capability before design implementation.

Q: Are IL250 and IL252 interchangeable?

A: IL250 and IL252 are both Vishay Semiconductor Opto Division products in 6-DIP packaging with 5300Vrms isolation. The primary difference is Current Transfer Ratio: IL250 provides 50% @ 10mA, while IL252 provides 100% @ 10mA. Both support the same operating temperature range and output configuration. Selection depends on circuit requirements for current transfer efficiency.

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

A: H11AA1VM (onsemi) and IL252 (Vishay Semiconductor Opto Division) are both active products with current manufacturing status. onsemi and Vishay are established manufacturers with established supply chains. Both parts are suitable for production designs requiring supply continuity.

Q: Does operating temperature range affect substitution compatibility?

A: H11AA2VM operates from -40°C to 100°C. Substitutes H11AA1-X001, H11AA2, IL250, and IL252 extend the minimum operating temperature to -55°C, providing broader thermal capability. H11AA1VM and H11AA1 maintain the -40°C to 100°C range. Substitution is valid if the application does not require operation below -40°C.

Q: Can H11AA2 (Fairchild) be used as a substitute despite obsolete status?

A: H11AA2 is classified as obsolete and not recommended for new production designs. While it provides compatible 6-DIP packaging and transistor with base output, discontinued manufacturing status creates supply risk and limits long-term availability. Active alternatives such as H11AA1VM or IL252 are preferred.