H11F3W Equivalent & Substitute Parts

Part Overview

The H11F3W is an optoisolator with MOSFET output manufactured by onsemi, designed for high-voltage isolation applications. It provides 5300Vrms isolation rating in a 6-DIP through-hole package. The part is currently obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

H11F3W

onsemiIn Stock: 1120H11F3W Datasheet

Current PartRFQ

H11F1TVM

Fairchild SemiconductorIn Stock: 1457H11F1TVM Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the H11F3W is determined by the following critical parameters:

• Package Compatibility: Both parts must use 6-DIP through-hole packaging to ensure PCB layout compatibility
• Output Type: MOSFET output configuration must be maintained for circuit functionality
• Isolation Voltage: The substitute must meet or exceed the 5300Vrms isolation requirement
• Input/Output Electrical Characteristics: Forward voltage (Vf), forward current (If), and output voltage ratings must be compatible with the application circuit
• Operating Temperature Range: The substitute must support the required temperature envelope
• Number of Channels: Single-channel configuration must be preserved

The H11F1TVM qualifies as a substitute based on matching package type, output configuration, and channel count. However, differences in isolation voltage, output voltage rating, and switching speed must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The H11F1TVM is available as an active product from Fairchild Semiconductor, providing supply continuity for applications currently using the obsolete H11F3W. Both parts share identical package geometry, input/output electrical characteristics (Vf and If ratings), and MOSFET output configuration.

Key differences requiring application evaluation:

• Isolation Voltage: The H11F1TVM provides 4170Vrms isolation versus 5300Vrms for the H11F3W. Applications requiring the full 5300Vrms isolation margin must confirm that 4170Vrms meets system safety and regulatory requirements.
• Output Voltage Rating: The H11F1TVM supports 30V maximum output versus 15V for the H11F3W, providing greater headroom in output circuit design.
• Switching Speed: The H11F1TVM exhibits 45µs switching time versus 25µs for the H11F3W. Applications with timing-critical switching requirements must confirm compatibility with the slower response.
• Operating Temperature Range: The H11F1TVM operates from -40°C to 100°C versus -55°C to 100°C for the H11F3W. Applications requiring operation below -40°C cannot use this substitute.

Both parts carry identical ECCN (EAR99) and HTSUS (8541.49.8000) classifications.

Frequently Asked Questions (FAQ)

Q: Can the H11F1TVM directly replace the H11F3W in existing designs?

A: Physical and electrical compatibility exists for package and basic functional parameters. However, the reduced isolation voltage (4170Vrms vs. 5300Vrms), slower switching speed (45µs vs. 25µs), and narrower temperature range (-40°C to 100°C vs. -55°C to 100°C) must be evaluated against specific application requirements before substitution.

Q: What is the primary reason for finding a substitute for the H11F3W?

A: The H11F3W is obsolete. The H11F1TVM is an active product with ongoing availability, making it suitable for new production and long-term supply assurance.

Q: Are the package dimensions identical between these parts?

A: Yes. Both parts use 6-DIP (0.400", 10.16mm) through-hole packaging, ensuring PCB layout compatibility without modification.

Q: What are the critical parameter differences between these optoisolators?

A: The primary differences are isolation voltage rating (5300Vrms vs. 4170Vrms), maximum output voltage (15V vs. 30V), switching time (25µs vs. 45µs), and operating temperature range (-55°C to 100°C vs. -40°C to 100°C).

Q: Do both parts have the same input electrical characteristics?

A: Yes. Both parts share identical forward voltage (1.3V typical) and maximum forward current (60 mA) specifications.

Q: Which applications would require the full 5300Vrms isolation of the H11F3W?

A: High-voltage isolation applications with strict safety margins or regulatory requirements specifying minimum isolation voltage thresholds would require confirmation that the H11F1TVM's 4170Vrms rating is acceptable.