H11D4SD Optoisolator Equivalent & Substitute Parts

Part Overview

The H11D4SD is an optoisolator transistor with base output manufactured by onsemi, rated for 5300Vrms isolation voltage in a 6-SMD surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The H11D4SD provides DC input with transistor output including base connection, suitable for high-voltage isolation applications requiring 1 channel operation.

Substiute Parts

H11D4SD

onsemiIn Stock: 4470H11D4SD Datasheet

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H11D1SR2M

onsemiIn Stock: 1988H11D1SR2M Datasheet

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H11D3SR2M

onsemiIn Stock: 2475H11D3SR2M Datasheet

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H11D4SM

Isocom Components 2004 LTDIn Stock: 749H11D4SM Datasheet

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H11D4SMT&R

Isocom Components 2004 LTDIn Stock: 1088H11D4SMT&R Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the H11D4SD is determined by the following critical parameters: isolation voltage rating, number of channels, output type (transistor with base), maximum output voltage, output current capability, switching characteristics, package type, and operating temperature range.

The substitute parts are grouped into two categories based on isolation voltage compatibility:

Category 1: Lower Isolation Voltage (4170Vrms) — H11D1SR2M and H11D3SR2M from onsemi. These parts maintain the same channel count, output type, and package configuration but operate at reduced isolation voltage. Both are active products with RoHS3 compliance.

Category 2: Alternative Isolation Specification (7.5Vpk) — H11D4SM and H11D4SMT&R from Isocom Components 2004 LTD. These parts share the same base series designation and package type but specify isolation voltage differently (peak voltage rather than RMS). Both are active products with RoHS3 compliance and represent alternative sourcing from a different manufacturer.

Parameter Comparison

Engineering Selection Recommendations

For applications requiring the H11D4SD, selection among substitute parts depends on isolation voltage requirements and product lifecycle status:

H11D1SR2M and H11D3SR2M are recommended for designs where 4170Vrms isolation voltage is acceptable. Both are active onsemi products with ROHS3 compliance, ensuring long-term availability and regulatory alignment. H11D1SR2M provides higher maximum output voltage (300V) compared to the original specification. H11D3SR2M maintains the original 200V maximum output voltage. Both operate at -40°C minimum temperature, which is less stringent than the H11D4SD's -55°C rating.

H11D4SM and H11D4SMT&R from Isocom Components 2004 LTD are active alternatives with identical package configuration and operating temperature range (-55°C ~ 100°C). These parts specify isolation voltage in peak voltage units rather than RMS, representing a different measurement standard. Both are ROHS3 compliant. H11D4SMT&R includes tape and reel packaging for automated assembly, while H11D4SM uses tube packaging.

All substitute parts maintain identical channel count, output type, switching characteristics, and saturation voltage specifications. Selection should prioritize active product status and compliance certifications for new designs.

Frequently Asked Questions (FAQ)

Q: Can H11D1SR2M or H11D3SR2M directly replace H11D4SD?

A: Both parts share the same 6-SMD package, single channel configuration, transistor with base output type, and identical switching times. H11D1SR2M and H11D3SR2M operate at 4170Vrms isolation voltage compared to H11D4SD's 5300Vrms. Applications requiring isolation voltage below 4170Vrms can use these substitutes. H11D1SR2M supports higher output voltage (300V vs 200V). Both are active products with ROHS3 compliance, unlike the obsolete H11D4SD.

Q: What is the difference between H11D4SM and H11D4SMT&R?

A: Both parts are manufactured by Isocom Components 2004 LTD with identical electrical specifications. The primary difference is packaging: H11D4SM uses tube packaging, while H11D4SMT&R uses tape and reel (TR) packaging. Tape and reel packaging is standard for automated pick-and-place assembly. Both maintain the same 6-SMD gull wing package configuration and operating temperature range.

Q: Why do H11D4SM and H11D4SMT&R specify isolation voltage as 7.5Vpk instead of Vrms?

A: Isolation voltage can be expressed in different units. The H11D4SM and H11D4SMT&R use peak voltage (Vpk) specification, while H11D4SD uses RMS voltage (Vrms). These represent different measurement standards for the same electrical property. Direct numerical comparison between Vpk and Vrms values requires conversion and is not performed in this reference.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. H11D1SR2M, H11D3SR2M, H11D4SM, and H11D4SMT&R are all ROHS3 compliant. The original H11D4SD does not specify RoHS status. All substitute parts meet current regulatory requirements for hazardous substance restrictions.

Q: What is the minimum operating temperature difference between H11D4SD and its onsemi substitutes?

A: H11D4SD operates from -55°C minimum temperature. H11D1SR2M and H11D3SR2M operate from -40°C minimum temperature. Applications requiring operation below -40°C must use H11D4SD or the Isocom alternatives (H11D4SM or H11D4SMT&R), which maintain the -55°C minimum specification.

Q: Can I use H11D4SM in automated assembly processes?

A: H11D4SM uses tube packaging, which is suitable for manual or semi-automated assembly. For fully automated pick-and-place assembly, H11D4SMT&R with tape and reel packaging is the appropriate choice.