H11A5FVM Equivalent & Substitute Parts

Part Overview

The H11A5FVM is an optoisolator transistor with base output manufactured by onsemi, designed for high-voltage isolation applications requiring 7500Vpk isolation rating. This component features a single channel configuration in a 6-SMD surface mount package with a turn-on/turn-off time of 2µs. The product is currently obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Substiute Parts

H11A5FVM

onsemiIn Stock: 862H11A5FVM Datasheet

Current PartRFQ

H11AG1SR2M

onsemiIn Stock: 128082H11AG1SR2M Datasheet

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H11A5

onsemiIn Stock: 1282H11A5 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the H11A5FVM is determined by the following critical parameters:

• Isolation Voltage: The substitute must meet or exceed 7500Vpk isolation rating to maintain electrical safety margins in high-voltage isolation applications.
• Output Configuration: Transistor with base output is required for circuit compatibility.
• Number of Channels: Single channel configuration must be maintained.
• Package Type: Surface mount 6-SMD Gull Wing package is preferred for form factor compatibility, though through-hole alternatives may be considered for legacy designs.
• Current Transfer Ratio: Minimum 30% @ 10mA ensures adequate signal transmission.
• Output Voltage & Current: Maximum 30V output with appropriate current handling capability.
• Switching Speed: Turn-on/turn-off time of 2µs or faster supports timing-critical applications.

Based on these criteria, the following parts are identified as substitutes:

H11AG1SR2M (onsemi) - Active product with lower isolation voltage (4170Vrms) but higher current transfer ratio and improved availability.

H11A5 (onsemi) - Through-hole alternative with comparable isolation voltage (5300Vrms) and matching switching characteristics, though in 6-DIP package format.

Parameter Comparison

Engineering Selection Recommendations

H11AG1SR2M is the primary substitute for new designs and ongoing production. This part maintains the same surface mount 6-SMD Gull Wing package format, ensuring direct PCB compatibility without layout modifications. The H11AG1SR2M is an active product with robust inventory availability (128,053 pcs), providing supply chain continuity. While the isolation voltage is lower at 4170Vrms compared to the H11A5FVM's 7500Vpk, the H11AG1SR2M delivers superior current transfer ratio performance (100% @ 1mA) and meets ROHS3 compliance requirements. This part is suitable for applications where the lower isolation voltage remains within system safety specifications.

H11A5 serves as an alternative for legacy through-hole designs or applications requiring extended temperature range operation (-55°C to 100°C). This part maintains the same switching speed (2µs) and current transfer ratio characteristics as the H11A5FVM, with higher maximum forward current capability (100 mA). However, the 6-DIP through-hole package requires different PCB footprints and assembly processes compared to the surface mount H11A5FVM. The H11A5 is also obsolete, limiting long-term availability.

Frequently Asked Questions (FAQ)

Q: Can H11AG1SR2M directly replace H11A5FVM in existing designs?

A: H11AG1SR2M provides direct PCB footprint compatibility as both use 6-SMD Gull Wing surface mount packages. However, the isolation voltage specification differs (4170Vrms vs. 7500Vpk). Substitution is valid only if the application's isolation voltage requirement does not exceed 4170Vrms. Circuit validation is necessary to confirm adequate safety margins for your specific isolation voltage needs.

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

A: Vpk (peak voltage) and Vrms (RMS voltage) represent different measurement standards for isolation voltage. Direct comparison requires understanding your system's voltage waveform characteristics. The H11A5FVM specifies 7500Vpk isolation, while H11AG1SR2M specifies 4170Vrms isolation. These are not directly equivalent values and depend on the application's voltage profile.

Q: Is H11A5 a suitable substitute for surface mount applications?

A: H11A5 uses a 6-DIP through-hole package, which is incompatible with surface mount PCB designs without significant layout and assembly process changes. This part is suitable only for through-hole or hybrid assembly designs. For surface mount applications, H11AG1SR2M is the appropriate choice.

Q: What are the inventory implications of these substitutes?

A: H11AG1SR2M has substantial inventory availability (128,053 pcs), ensuring reliable supply for production. Both H11A5FVM and H11A5 are obsolete products with limited remaining stock (810 pcs and 1,217 pcs respectively). For new designs and long-term production, H11AG1SR2M is the recommended choice based on product status and availability.

Q: How do switching speed differences affect circuit performance?

A: H11A5FVM and H11A5 both specify 2µs turn-on/turn-off time, while H11AG1SR2M specifies 5µs. In timing-critical applications requiring fast switching response, the H11A5FVM or H11A5 characteristics are preferred. For applications with relaxed timing requirements, the 5µs switching speed of H11AG1SR2M is acceptable.

Q: Are all three parts REACH compliant?

A: All three parts (H11A5FVM, H11AG1SR2M, and H11A5) are REACH Unaffected. H11AG1SR2M additionally carries ROHS3 compliance certification, providing enhanced environmental compliance for regulated markets.