H11D33S Equivalent & Substitute Parts

Part Overview

The H11D33S is an optoisolator transistor with base output manufactured by onsemi, featuring 5300Vrms isolation voltage in a 6-SMD surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. The H11D33S provides DC input with transistor output including base connection, suitable for high-voltage isolation applications requiring 1 channel configuration.

Substiute Parts

H11D33S

onsemiIn Stock: 994H11D33S Datasheet

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H11D1SR2M

onsemiIn Stock: 1988H11D1SR2M Datasheet

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H11D3SM

Fairchild SemiconductorIn Stock: 12731H11D3SM Datasheet

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H11D3SMT&R

Isocom Components 2004 LTDIn Stock: 1032H11D3SMT&R Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the H11D33S is determined by the following critical parameters: single channel configuration, transistor output with base, 6-SMD surface mount package with gull wing leads, 100mA output current capability, 400mV maximum Vce saturation, and 5µs switching times. The isolation voltage requirement of 5300Vrms is the primary differentiator among available alternatives. Substitute parts must maintain compatibility across input type (DC), output type (transistor with base), package form factor, and thermal operating range overlap. The following parts meet these core substitution criteria with variations in isolation voltage rating and product status.

Parameter Comparison

Engineering Selection Recommendations

H11D1SR2M is an active product from onsemi with ROHS3 compliance, offering the closest manufacturer continuity to the obsolete H11D33S. This part maintains identical switching characteristics and output current ratings. The isolation voltage is reduced to 4170Vrms, which represents a lower rating than the original specification. Selection of H11D1SR2M is appropriate for applications where the 4170Vrms isolation requirement is sufficient.

H11D3SM is an active product from Fairchild Semiconductor with identical isolation voltage (4170Vrms) and output voltage maximum (200V) to H11D1SR2M. This part provides equivalent electrical performance with different manufacturer sourcing and bulk packaging option.

H11D3SMT&R is an active product from Isocom Components 2004 LTD with ROHS3 compliance. This part features the highest isolation voltage rating at 7.5Vpk among the substitutes and maintains the full operating temperature range of -55°C ~ 100°C matching the original H11D33S. However, the isolation voltage specification format differs from the original part.

Frequently Asked Questions (FAQ)

Q: Can H11D1SR2M directly replace H11D33S in existing designs? A: H11D1SR2M maintains identical channel count, output type, switching times, output current, and package configuration. The isolation voltage is reduced from 5300Vrms to 4170Vrms. Direct replacement is possible only if the application isolation requirement does not exceed 4170Vrms.

Q: What is the primary difference between H11D3SM and H11D1SR2M? A: Both parts share identical electrical specifications including 4170Vrms isolation voltage, 200V maximum output voltage, and 100mA output current. The primary differences are manufacturer (Fairchild Semiconductor versus onsemi) and packaging format (bulk versus tape & reel).

Q: Why does H11D3SMT&R show a different isolation voltage specification format? A: H11D3SMT&R specifies isolation voltage as 7.5Vpk rather than Vrms. This represents a different measurement standard. Applications requiring high-voltage isolation in the kilovolt range should prioritize H11D1SR2M or H11D3SM.

Q: Are all substitute parts available in the same 6-SMD gull wing package? A: All four parts (H11D33S, H11D1SR2M, H11D3SM, H11D3SMT&R) use 6-SMD surface mount packages with gull wing leads, ensuring mechanical compatibility in PCB assembly.

Q: Which substitute part offers the widest operating temperature range? A: H11D33S and H11D3SMT&R both support -55°C ~ 100°C operating temperature range. H11D1SR2M and H11D3SM support -40°C ~ 100°C, which is narrower at the lower temperature extreme.

Q: What compliance certifications should I verify for new designs? A: H11D1SR2M carries ROHS3 compliance. H11D3SMT&R carries ROHS3 compliance. All parts listed are REACH Unaffected and classified as EAR99 for export control purposes.