H11F33SD Equivalent & Substitute Parts

Part Overview

The H11F33SD is an optoisolator with MOSFET output manufactured by onsemi, featuring 5300Vrms isolation voltage in a 6-SMD surface mount package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The H11F33SD provides galvanic isolation for DC input signals with MOSFET output switching capability suitable for high-voltage applications.

Substiute Parts

H11F33SD

onsemiIn Stock: 1043H11F33SD Datasheet

Current PartRFQ

H11F3SVM

Fairchild SemiconductorIn Stock: 3444H11F3SVM Datasheet

DirectRFQ

H11F3SR2VM

Fairchild SemiconductorIn Stock: 3271H11F3SR2VM Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the H11F33SD are identified based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

• Output Type: MOSFET
• Input Type: DC
• Number of Channels: 1
• Package / Case: 6-SMD, Gull Wing
• Mounting Type: Surface Mount
• Voltage - Output (Max): 15V
• Voltage - Forward (Vf) (Typ): 1.3V
• Current - DC Forward (If) (Max): 60 mA

Secondary Consideration:

• Voltage - Isolation: Substitute parts operate at 4170Vrms, which is lower than the H11F33SD specification of 5300Vrms. This represents a functional trade-off where isolation voltage is reduced but remains suitable for applications not requiring the full 5300Vrms rating.

The substitute parts H11F3SVM and H11F3SR2VM share identical electrical and mechanical specifications except for isolation voltage and switching speed characteristics.

Parameter Comparison

Engineering Selection Recommendations

H11F3SVM and H11F3SR2VM are active production alternatives to the obsolete H11F33SD. Both substitute parts maintain identical mechanical compatibility through the 6-SMD, Gull Wing package specification and share core electrical characteristics including output voltage, forward voltage, and forward current ratings.

The primary trade-offs in selecting these substitutes are:

1. Isolation Voltage Reduction: Substitute parts provide 4170Vrms isolation versus 5300Vrms in the original part. Applications requiring the full 5300Vrms isolation rating cannot use these substitutes.

2. Switching Speed: Substitute parts exhibit 45µs turn-on and turn-off times compared to 25µs in the H11F33SD. Applications with timing-critical switching requirements must account for this 20µs increase.

3. Operating Temperature Range: Substitute parts operate from -40°C to 100°C versus -55°C to 100°C for the original part. Applications requiring operation below -40°C cannot use these substitutes.

4. Compliance and Certification: Both substitute parts carry identical ECCN (EAR99) and HTSUS (8541.49.8000) classifications, maintaining regulatory equivalence.

Both H11F3SVM and H11F3SR2VM are functionally equivalent to each other and are available in active production status with established inventory levels.

Frequently Asked Questions (FAQ)

Q: Can H11F3SVM or H11F3SR2VM be used as direct replacements for H11F33SD?

A: These parts are mechanically compatible through identical 6-SMD, Gull Wing packaging and share the same output type, input type, and channel configuration. However, they operate at reduced isolation voltage (4170Vrms versus 5300Vrms) and have slower switching times (45µs versus 25µs). Substitution is valid only for applications that do not require the full 5300Vrms isolation rating or the faster 25µs switching performance.

Q: What is the difference between H11F3SVM and H11F3SR2VM?

A: Both parts are manufactured by Fairchild Semiconductor and share identical electrical and mechanical specifications. They differ only in part number designation and packaging designation (Bulk for both). Both are active production parts with comparable inventory availability.

Q: Why is the H11F33SD classified as obsolete?

A: The H11F33SD is listed as obsolete by onsemi. Substitute parts from Fairchild Semiconductor (H11F3SVM and H11F3SR2VM) are active production alternatives that provide functional equivalence for most applications within the specified parameter constraints.

Q: Are there any compliance or regulatory differences between the main part and substitutes?

A: No. All parts share identical ECCN (EAR99) and HTSUS (8541.49.8000) classifications, indicating equivalent regulatory treatment for export and tariff purposes.

Q: What applications are affected by the reduced isolation voltage in substitute parts?

A: Applications requiring isolation voltage greater than 4170Vrms cannot use H11F3SVM or H11F3SR2VM. Applications designed for 4170Vrms or lower isolation requirements are unaffected.

Q: What applications are affected by the increased switching time in substitute parts?

A: Applications with switching frequency requirements dependent on 25µs turn-on and turn-off times must account for the 45µs performance of substitute parts. High-frequency switching applications may require design review to confirm compatibility with the slower switching speed.