H11D4S Optoisolator Equivalent & Substitute Parts

Part Overview

The H11D4S 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 H11D4S provides DC input with transistor output including base connection, suitable for high-voltage isolation applications requiring 100mA output current capability.

Substiute Parts

H11D4S

onsemiIn Stock: 1071H11D4S Datasheet

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H11D1SR2M

onsemiIn Stock: 1988H11D1SR2M Datasheet

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H11D3SM

Fairchild SemiconductorIn Stock: 12731H11D3SM 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 H11D4S is determined by the following critical parameters:

• Isolation Voltage Rating: The H11D4S operates at 5300Vrms. Substitute parts must maintain isolation voltage at or above this level to ensure equivalent safety and performance margins.
• Output Configuration: All substitutes must provide transistor output with base connection to maintain circuit compatibility.
• Package Type: All substitutes must use 6-SMD, Gull Wing surface mount packaging for PCB layout compatibility.
• Output Current Capability: Substitutes must support 100mA output current per channel.
• Input Type: All substitutes must accept DC input.
• Turn-On/Turn-Off Time: Substitutes must match the 5µs switching characteristics.

The H11D4S has four identified substitute parts from the H11D series family. These substitutes are grouped based on their ability to meet the isolation voltage requirement and maintain functional equivalence in high-voltage isolation applications.

Parameter Comparison

Engineering Selection Recommendations

H11D1SR2M (onsemi): This part is active and ROHS3 compliant. The isolation voltage of 4170Vrms is lower than the H11D4S specification of 5300Vrms. Selection of this substitute requires circuit analysis to confirm that the reduced isolation voltage meets application safety margins. The higher current transfer ratio of 20% provides improved performance characteristics compared to the H11D4S minimum of 10%.

H11D3SM (Fairchild Semiconductor): This part is active with 4170Vrms isolation voltage, matching the H11D1SR2M isolation rating. The reduced isolation voltage compared to the H11D4S requires application-level verification. Bulk packaging is provided; tape and reel options may require sourcing from alternative suppliers.

H11D4SM (Isocom Components 2004 LTD): This part is active and ROHS3 compliant with operating temperature range matching the H11D4S (-55°C ~ 100°C). The isolation voltage specification of 7.5Vpk differs significantly from the H11D4S 5300Vrms rating and represents a different isolation voltage measurement standard. This part requires detailed application review before substitution.

H11D4SMT&R (Isocom Components 2004 LTD): This part is active and ROHS3 compliant, provided in Tape & Reel packaging for automated assembly. Operating temperature range and switching characteristics match the H11D4S. The isolation voltage specification of 7.5Vpk requires application-level assessment for compatibility.

Frequently Asked Questions (FAQ)

Q: Can H11D1SR2M directly replace H11D4S in all applications?

A: H11D1SR2M shares the same output configuration, current rating, and switching characteristics as H11D4S. However, the isolation voltage is rated at 4170Vrms compared to H11D4S at 5300Vrms. Direct substitution is only appropriate if the application isolation voltage requirement does not exceed 4170Vrms. Circuit design review is required to confirm compatibility.

Q: What is the difference between the isolation voltage specifications for H11D4SM and H11D4S?

A: H11D4S specifies 5300Vrms isolation voltage, while H11D4SM specifies 7.5Vpk. These represent different measurement standards and voltage ratings. The H11D4SM specification cannot be directly compared to H11D4S without consulting detailed datasheets and application requirements.

Q: Are all substitute parts available in the same packaging options?

A: No. H11D1SR2M is supplied in Tape & Reel (TR) packaging. H11D3SM is supplied in Bulk. H11D4SM is supplied in Tube. H11D4SMT&R is supplied in Tape & Reel (TR). Packaging selection depends on assembly process requirements and procurement volume.

Q: Which substitute parts are ROHS3 compliant?

A: H11D1SR2M, H11D4SM, and H11D4SMT&R are all ROHS3 compliant. The H11D3SM compliance status is not specified in the provided data.

Q: Do all substitute parts maintain the same operating temperature range as H11D4S?

A: H11D4S operates from -55°C to 100°C. H11D1SR2M and H11D3SM operate from -40°C to 100°C, providing a narrower low-temperature range. H11D4SM and H11D4SMT&R match the full -55°C to 100°C range of the H11D4S.

Q: What is the current transfer ratio difference between H11D4S and the substitute parts?

A: H11D4S specifies a minimum current transfer ratio of 10% at 10mA. All substitute parts specify 20% at 10mA, indicating improved optical coupling efficiency and potentially better performance margins in the application circuit.