H11L3SD Equivalent & Substitute Parts

Part Overview

The H11L3SD is a logic output optoisolator manufactured by onsemi, designed for applications requiring galvanic isolation with Schmitt trigger output characteristics. This component features 1MHz data rate capability, open collector output configuration, and 5300Vrms isolation voltage rating in a 6-SMD surface mount package.

The H11L3SD is classified as obsolete. Identifying suitable substitute components is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production requirements for systems utilizing this optoisolator topology.

Substiute Parts

H11L3SD

onsemiIn Stock: 4443H11L3SD Datasheet

Current PartRFQ

H11L3SM

onsemiIn Stock: 22222H11L3SM Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the H11L3SD is determined by the following critical parameters:

• Functional Topology: Single-channel optoisolator with DC input and open collector output
• Isolation Voltage: Minimum 5300Vrms isolation rating
• Output Current Capability: 50 mA per channel
• Data Rate: 1MHz operation
• Package Compatibility: 6-SMD, Gull Wing surface mount configuration
• Manufacturer Consistency: onsemi product line

The H11L3SM qualifies as a direct substitute based on matching all functional and mechanical parameters. However, the H11L3SM exhibits a reduced isolation voltage rating of 4170Vrms, which represents a downgrade from the original specification. This reduction must be evaluated against application requirements.

Parameter Comparison

Engineering Selection Recommendations

The H11L3SM is the designated substitute for the obsolete H11L3SD based on functional equivalence and active production status. The H11L3SM maintains identical channel count, input/output topology, data rate, and output current specifications.

Two parameter differences exist:

Isolation Voltage: The H11L3SM isolation rating of 4170Vrms is lower than the H11L3SD specification of 5300Vrms. Applications requiring isolation voltage exceeding 4170Vrms cannot use the H11L3SM as a direct substitute.

Forward Current: The H11L3SM maximum forward current rating of 30mA exceeds the H11L3SD rating of 5mA, providing improved input drive capability without functional impact.

Compliance Status: The H11L3SM achieves ROHS3 compliance, whereas the H11L3SD is non-compliant. For new designs or production requiring regulatory compliance, the H11L3SM is the appropriate selection.

Frequently Asked Questions (FAQ)

Q: Can the H11L3SM replace the H11L3SD in all applications?

A: The H11L3SM is functionally equivalent for applications where isolation voltage requirements do not exceed 4170Vrms. Applications specifically designed for 5300Vrms isolation must retain the H11L3SD or identify alternative components meeting the higher isolation specification.

Q: What is the primary reason for substitution?

A: The H11L3SD is obsolete. The H11L3SM is the active production equivalent from onsemi, ensuring supply chain continuity and long-term availability.

Q: Are the packages identical?

A: Both components use 6-SMD, Gull Wing surface mount packaging. PCB footprints and assembly processes are compatible without modification.

Q: Does the H11L3SM meet modern compliance requirements?

A: The H11L3SM is ROHS3 compliant, whereas the H11L3SD is non-compliant. For applications subject to RoHS regulations, the H11L3SM satisfies current requirements.

Q: What is the impact of the forward current difference?

A: The H11L3SM supports 30mA maximum forward current compared to the H11L3SD at 5mA. This represents an improvement in input drive capability and does not create compatibility issues in existing designs.

Q: Are there any electrical performance differences?

A: Both components operate at 1MHz data rate with 50mA output current capability. The H11L3SM provides specified propagation delay (4µs maximum) and rise/fall time (100ns typical) characteristics, whereas these parameters are not specified for the obsolete H11L3SD.