H11F23S Equivalent & Substitute Parts

Part Overview

The H11F23S is an optoisolator with MOSFET output manufactured by onsemi, designed for high-voltage isolation applications. This component features a 5300Vrms isolation rating and is housed in a 6-SMD surface mount package. The H11F23S is classified as obsolete, making identification of compatible substitute parts essential for ongoing design support and procurement planning.

Substiute Parts

H11F23S

onsemiIn Stock: 1132H11F23S Datasheet

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H11F1SM

onsemiIn Stock: 2147H11F1SM Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the H11F23S is determined by the following critical parameters:

• Isolation Voltage Rating: The substitute must maintain isolation capability at or above the application requirement. The H11F23S provides 5300Vrms isolation.
• Output Type: MOSFET output configuration must be preserved for circuit compatibility.
• Number of Channels: Single-channel configuration must be maintained.
• Maximum Output Voltage: 30V maximum output voltage specification must be supported.
• Input/Output Electrical Characteristics: Forward voltage (1.3V typical) and maximum forward current (60 mA) define the input LED drive requirements.
• Package Configuration: 6-SMD surface mount package with gull wing leads ensures PCB compatibility.
• Operating Temperature Range: The application temperature envelope must be supported by the substitute.

The H11F1SM qualifies as a substitute based on matching output type (MOSFET), channel count (1), package format (6-SMD, Gull Wing), and core electrical characteristics. However, the isolation voltage rating differs, requiring application-level verification.

Parameter Comparison

Engineering Selection Recommendations

The H11F1SM is the identified substitute for the obsolete H11F23S. Selection should be based on the following factors:

Product Status: The H11F1SM carries Active product status, ensuring continued availability and manufacturing support, whereas the H11F23S is obsolete.

Compliance: The H11F1SM is ROHS3 compliant, meeting current environmental and regulatory requirements for new designs and procurement.

Isolation Voltage Differential: The H11F1SM provides 4170Vrms isolation compared to the H11F23S at 5300Vrms. This represents a 1130Vrms reduction in isolation capability. Selection of this substitute requires confirmation that the application isolation voltage requirement does not exceed 4170Vrms.

Switching Speed: The H11F1SM exhibits slower switching characteristics (45µs turn-on/off time versus 25µs for the H11F23S). Applications with timing-critical switching requirements must evaluate this performance difference.

Operating Temperature Range: The H11F1SM supports -40°C to 100°C operation, compared to -55°C to 100°C for the H11F23S. Applications requiring operation below -40°C cannot use this substitute.

Frequently Asked Questions (FAQ)

Q: Can the H11F1SM directly replace the H11F23S in all applications?

A: Direct replacement is not universal. The H11F1SM differs in isolation voltage rating (4170Vrms versus 5300Vrms) and switching speed (45µs versus 25µs). Applications must verify that isolation voltage and switching timing requirements are compatible with the H11F1SM specifications.

Q: What is the primary reason for substitution?

A: The H11F23S is obsolete. The H11F1SM is the active equivalent from onsemi within the H11F optoisolator family, providing continued component availability.

Q: Are the package dimensions identical between H11F23S and H11F1SM?

A: Both components use 6-SMD surface mount packages with gull wing leads, ensuring PCB footprint compatibility.

Q: Does the H11F1SM meet current environmental standards?

A: Yes, the H11F1SM is ROHS3 compliant. The H11F23S compliance status is not specified in the provided data.

Q: What is the impact of the 1130Vrms isolation voltage reduction?

A: Applications designed for 5300Vrms isolation cannot use the H11F1SM without circuit redesign or additional isolation measures. Applications with isolation requirements at or below 4170Vrms are compatible.

Q: How does the switching speed difference affect circuit design?

A: The H11F1SM switching time is 20µs slower than the H11F23S. High-frequency switching applications or circuits with tight timing margins must evaluate whether this performance difference is acceptable.