H11F3S Equivalent & Substitute Parts

Part Overview

The H11F3S is an optoisolator with MOSFET output manufactured by onsemi, designed for high-voltage isolation applications. It features a 5300Vrms isolation rating, single-channel configuration, and 6-SMD surface mount packaging. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and procurement.

Substiute Parts

H11F3S

onsemiIn Stock: 129489H11F3S Datasheet

Current PartRFQ

H11F3SR2M

onsemiIn Stock: 3283H11F3SR2M Datasheet

DirectRFQ

H11F3SM

onsemiIn Stock: 3635H11F3SM Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the H11F3S are identified based on the following critical parameters that define functional equivalence:

• Manufacturer: onsemi (same manufacturer ensures design continuity)
• Output Type: MOSFET (functional output stage requirement)
• Number of Channels: 1 (single-channel configuration)
• Package / Case: 6-SMD, Gull Wing (mechanical and electrical compatibility)
• Voltage - Output (Max): 15V (output voltage specification)
• Voltage - Forward (Vf) (Typ): 1.3V (input diode forward voltage)
• Current - DC Forward (If) (Max): 60 mA (input current rating)

The H11F3S has two identified substitutes: H11F3SR2M and H11F3SM. Both parts share the same base product number (H11F) and maintain electrical compatibility across all critical parameters. The primary difference is isolation voltage rating and packaging format, which are documented in the parameter comparison table below.

Parameter Comparison

Engineering Selection Recommendations

Both H11F3SR2M and H11F3SM are active production parts suitable for replacing the obsolete H11F3S. Selection between these two substitutes depends on procurement and assembly requirements:

H11F3SR2M is designated as the direct substitute and is supplied in Tape & Reel (TR) format, optimized for automated assembly processes. This part carries ROHS3 compliance certification.

H11F3SM is classified as a similar substitute and is supplied in Tube packaging, suitable for manual assembly or lower-volume applications. This part also carries ROHS3 compliance certification.

Both substitutes operate within the same electrical envelope as the main part for all critical parameters. The isolation voltage is reduced from 5300Vrms to 4170Vrms, and switching times increase from 25µs to 45µs. The operating temperature range narrows from -55°C to -40°C at the lower bound. These differences must be evaluated against specific application requirements before final selection.

Frequently Asked Questions (FAQ)

Q: Can H11F3SR2M or H11F3SM be used as direct replacements for H11F3S in existing designs?

A: Both parts maintain electrical compatibility across output voltage, forward voltage, forward current, and MOSFET output type. However, the reduced isolation voltage (4170Vrms vs. 5300Vrms) and increased switching time (45µs vs. 25µs) must be verified against circuit requirements. The narrower operating temperature range (-40°C to 100°C vs. -55°C to 100°C) must also be confirmed for your application environment.

Q: What is the difference between H11F3SR2M and H11F3SM?

A: Both parts are electrically identical. The primary difference is packaging format: H11F3SR2M is supplied in Tape & Reel (TR) for automated assembly, while H11F3SM is supplied in Tube for manual or lower-volume assembly. Select based on your manufacturing process requirements.

Q: Are both substitute parts RoHS compliant?

A: Yes, both H11F3SR2M and H11F3SM carry ROHS3 compliance certification. The original H11F3S does not specify RoHS status.

Q: What is the isolation voltage difference, and does it matter?

A: The H11F3S provides 5300Vrms isolation, while both substitutes provide 4170Vrms isolation. This 1130Vrms reduction must be evaluated against your circuit's isolation requirements. If your design requires 5300Vrms isolation, these substitutes may not be suitable.

Q: Do the switching time differences affect circuit performance?

A: The H11F3S has turn-on and turn-off times of 25µs, while both substitutes have 45µs switching times. This 20µs increase may impact high-frequency switching applications. Verify that your circuit can tolerate the slower response time.

Q: Are there any compliance or regulatory differences?

A: All three parts share identical REACH and ECCN classifications (REACH Unaffected, EAR99). Both substitutes carry ROHS3 compliance, providing improved environmental compliance compared to the original part.