H11L1S Equivalent & Substitute Parts

Part Overview

The H11L1S is a logic output optoisolator manufactured by onsemi, designed for applications requiring galvanic isolation with Schmitt trigger output capability. This component features 1MHz data rate operation, open collector output configuration, and 5300Vrms isolation voltage rating in a 6-SMD surface mount package.

The H11L1S is classified as obsolete. Locating equivalent substitute parts is necessary to maintain design continuity and ensure component availability for new production runs and field replacements.

Substiute Parts

H11L1S

onsemiIn Stock: 1743H11L1S Datasheet

Current PartRFQ

H11L1SM

onsemiIn Stock: 41650H11L1SM Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the H11L1S is determined by the following critical parameters:

• Channel Configuration: 1 channel, DC input, open collector output
• Isolation Voltage: Minimum 5300Vrms isolation rating
• Output Current Capability: 50 mA per channel
• Data Rate: 1MHz operation
• Package Type: 6-SMD, Gull Wing surface mount
• Manufacturer Compatibility: onsemi product family

The H11L1SM is identified as a substitute part within the onsemi H11L series. While the H11L1SM provides the same channel configuration, output type, current rating, data rate, and package format, it operates at a lower isolation voltage rating of 4170Vrms. This represents a functional downgrade in isolation performance and may not be suitable for applications requiring the full 5300Vrms isolation specification of the original H11L1S.

Parameter Comparison

Engineering Selection Recommendations

The H11L1SM is an active product with ROHS3 compliance, addressing the obsolescence of the H11L1S. However, the reduced isolation voltage rating of 4170Vrms versus the original 5300Vrms specification represents a material change in electrical performance.

Selection of the H11L1SM as a substitute requires verification that the application isolation requirements can be met at the lower voltage rating. Applications designed specifically for 5300Vrms isolation margin may not be compatible with this substitute without circuit redesign or additional isolation measures.

The H11L1SM provides improved forward current specification (30mA maximum versus 1.6mA) and includes operating temperature range definition (-40°C to 85°C), which are not specified for the H11L1S.

Frequently Asked Questions (FAQ)

Q: Can the H11L1SM directly replace the H11L1S in all applications?

A: Direct replacement is limited to applications where the isolation voltage requirement does not exceed 4170Vrms. Applications requiring the full 5300Vrms isolation specification of the H11L1S cannot use the H11L1SM without circuit modification.

Q: What are the key differences between these parts?

A: The primary difference is isolation voltage rating: H11L1S operates at 5300Vrms while H11L1SM operates at 4170Vrms. The H11L1SM is an active product with ROHS3 compliance, whereas the H11L1S is obsolete and RoHS non-compliant. Both share identical channel configuration, output type, current rating, data rate, and package format.

Q: Are the packages identical?

A: Yes. Both the H11L1S and H11L1SM use 6-SMD, Gull Wing surface mount packaging with identical pinout and footprint compatibility.

Q: What is the impact of the different forward current specifications?

A: The H11L1SM specifies a maximum forward current of 30mA compared to 1.6mA for the H11L1S. This indicates improved LED drive capability in the H11L1SM and does not present a compatibility issue for substitution.

Q: Does RoHS compliance affect substitution decisions?

A: RoHS compliance status reflects manufacturing and material standards. The H11L1SM's ROHS3 compliance may be required for new designs or applications subject to RoHS regulations, whereas the H11L1S's non-compliance may restrict its use in regulated environments.