H11F3 Optoisolator MOSFET Output Equivalent & Substitute Parts

Part Overview

The H11F3 is an optoisolator with MOSFET output manufactured by onsemi, designed for high-voltage isolation applications. It features a 5300Vrms isolation rating and operates across a temperature range of -55°C to 100°C. The device is currently classified as obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations. The H11F3 is packaged in a 6-DIP through-hole configuration with a single isolation channel and DC input type.

Substiute Parts

H11F3

onsemiIn Stock: 1452H11F3 Datasheet

Current PartRFQ

H11F3M

onsemiIn Stock: 2300H11F3M Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the H11F3 is determined by the following critical parameters that must remain compatible:

• Package / Case: 6-DIP (0.300", 7.62mm) — physical and electrical pin compatibility
• Output Type: MOSFET — functional output stage requirement
• Number of Channels: 1 — single-channel isolation architecture
• Input Type: DC — input signal type
• Voltage - Output (Max): 15V — maximum output voltage specification
• Voltage - Forward (Vf) (Typ): 1.3V — input LED forward voltage
• Current - DC Forward (If) (Max): 60 mA — maximum input current
• Mounting Type: Through Hole — board assembly compatibility
• Voltage - Isolation: Minimum acceptable isolation rating for the application

The H11F3M is identified as a direct substitute within the onsemi H11F product family. While the H11F3M operates at a lower isolation voltage (4170Vrms versus 5300Vrms), it maintains electrical and mechanical compatibility across all other critical parameters. The H11F3M is currently in active production status, providing supply continuity for applications where the reduced isolation rating is acceptable.

Parameter Comparison

Engineering Selection Recommendations

The H11F3M is the designated substitute for the obsolete H11F3. Selection of the H11F3M is appropriate when the following conditions are met:

• Application isolation voltage requirement does not exceed 4170Vrms
• Switching response time of 45µs (versus 25µs for the H11F3) is acceptable
• Operating temperature range of -40°C to 100°C satisfies system requirements
• Through-hole 6-DIP package is compatible with existing PCB layouts

The H11F3M maintains active production status with onsemi, ensuring supply availability and long-term support. Both devices carry REACH Unaffected compliance status. The H11F3M is RoHS3 compliant, providing additional environmental regulatory alignment for new designs.

For applications requiring the full 5300Vrms isolation rating or -55°C minimum operating temperature of the original H11F3, alternative optoisolator families from onsemi or other manufacturers must be evaluated based on specific isolation voltage and temperature requirements.

Frequently Asked Questions (FAQ)

Q: Can the H11F3M be used as a direct pin-for-pin replacement for the H11F3?

A: Yes. Both devices use the 6-DIP (0.300", 7.62mm) package with identical pin configurations. No PCB layout modifications are required for physical substitution.

Q: What is the primary difference between the H11F3 and H11F3M?

A: The H11F3M operates at a lower isolation voltage rating (4170Vrms versus 5300Vrms) and has slower switching times (45µs versus 25µs). The H11F3M also has a narrower operating temperature range (-40°C to 100°C versus -55°C to 100°C).

Q: Is the H11F3M suitable for high-voltage isolation applications?

A: The H11F3M provides 4170Vrms isolation, which is appropriate for most industrial and consumer applications. Applications requiring isolation above 4170Vrms must use the original H11F3 or alternative components with higher isolation ratings.

Q: What is the impact of the slower switching time in the H11F3M?

A: The H11F3M has turn-on and turn-off times of 45µs compared to 25µs for the H11F3. This difference may affect circuit performance in high-frequency switching applications. System-level timing analysis is necessary to confirm compatibility.

Q: Are there supply considerations when switching from H11F3 to H11F3M?

A: The H11F3 is obsolete with limited inventory availability. The H11F3M is in active production, providing reliable long-term supply. Transition to the H11F3M is recommended for new designs and ongoing production support.

Q: Does the H11F3M meet current environmental compliance standards?

A: Yes. The H11F3M is RoHS3 compliant and carries REACH Unaffected status, meeting current environmental regulatory requirements for electronic components.