H11AA3VM Optoisolator Equivalent & Substitute Parts

Part Overview

The H11AA3VM is a single-channel optoisolator transistor with base output manufactured by onsemi, rated for 7500Vpk isolation voltage in a 6-DIP through-hole package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The H11AA3VM provides galvanic isolation for AC and DC input signals with transistor output capable of 50mA per channel and 30V maximum output voltage.

Substiute Parts

H11AA3VM

onsemiIn Stock: 12410H11AA3VM Datasheet

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H11AA4VM

onsemiIn Stock: 12157H11AA4VM 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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H11AA3X

Isocom Components 2004 LTDIn Stock: 1612H11AA3X 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 for the H11AA3VM is determined by the following critical parameters:

• Package compatibility: 6-DIP (0.300", 7.62mm) through-hole mounting
• Functional output: Transistor with base output configuration
• Input capability: AC and DC input support
• Isolation voltage: Minimum 5300Vrms (equivalent to 7500Vpk specification)
• Output specifications: Maximum 30V output, 50mA per channel capability
• Current transfer ratio: Minimum 20% @ 10mA or higher
• Saturation voltage: 400mV maximum
• Operating temperature range: -40°C to 100°C minimum

Substitute parts are grouped into two categories based on isolation voltage performance:

Category A (High Isolation - 5300Vrms and above): H11AA3X, H11AA1-X001, IL250, IL252 These parts meet or exceed the isolation voltage requirement and maintain full electrical compatibility.

Category B (Lower Isolation - 4170Vrms): H11AA4VM This part provides reduced isolation voltage but maintains all other critical electrical parameters and package compatibility.

Category C (Unspecified Isolation): H11AA1 This part lacks specified isolation voltage data but maintains package, output type, and electrical parameter compatibility.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Recommended for Direct Replacement)

H11AA3X, IL250, and IL252 are the preferred substitutes. All three maintain isolation voltage at 5300Vrms, which exceeds the minimum threshold for H11AA3VM applications. These parts are active products with ROHS3 compliance and REACH unaffected status, ensuring long-term availability and regulatory compliance. H11AA3X and IL250 provide 50% current transfer ratio matching the original specification, while IL252 offers enhanced 100% current transfer ratio for improved performance margin.

Secondary Substitute (Reduced Isolation)

H11AA4VM is suitable for applications where 4170Vrms isolation voltage is acceptable. This part is active and ROHS3 compliant. The higher current transfer ratio (100% @ 10mA) provides improved switching performance compared to the original 50% specification.

Tertiary Substitute (Unspecified Isolation)

H11AA1 maintains full package and electrical parameter compatibility but lacks specified isolation voltage data. This part is active and ROHS3 compliant. Use only when isolation voltage specification is not critical to application requirements.

Extended Temperature Range Option

H11AA1-X001 and IL250 extend the operating temperature range to -55°C, providing enhanced performance in extreme cold environments compared to the H11AA3VM baseline of -40°C.

Frequently Asked Questions (FAQ)

Q: Can H11AA4VM replace H11AA3VM in all applications?

A: H11AA4VM is electrically compatible and maintains the same package, output type, and current handling specifications. However, the isolation voltage is reduced from 7500Vpk to 4170Vrms. Substitution is valid only for applications where the lower isolation voltage meets system requirements.

Q: What is the difference between 7500Vpk and 5300Vrms isolation ratings?

A: Peak voltage (Vpk) and RMS voltage (Vrms) are different measurement standards for isolation capability. The provided substitute parts specify isolation in Vrms. Both ratings indicate the maximum voltage that can be safely isolated between input and output circuits. Confirm application requirements before substitution.

Q: Are all substitute parts pin-compatible with H11AA3VM?

A: All listed substitutes use the 6-DIP (0.300", 7.62mm) package with identical through-hole mounting. Pin configuration compatibility must be verified against specific application schematics, as base-output transistor optoisolators may have different pin assignments across manufacturers.

Q: Which substitute offers the best current transfer ratio?

A: H11AA4VM and IL252 both provide 100% current transfer ratio @ 10mA, compared to the H11AA3VM specification of 50%. Higher current transfer ratio indicates more efficient signal coupling and improved switching performance.

Q: Are the substitute parts RoHS compliant?

A: All active substitute parts (H11AA4VM, H11AA1, H11AA1-X001, H11AA3X, IL250, IL252) are ROHS3 compliant. The original H11AA3VM does not specify RoHS status due to its obsolete classification.

Q: What is the inventory status of substitute parts?

A: H11AA4VM (12,100 pcs), H11AA1 (15,697 pcs), H11AA1-X001 (2,140 pcs), H11AA3X (1,539 pcs), IL250 (16,767 pcs), and IL252 (9,800 pcs) are all listed as new original in stock, ensuring procurement availability.