H11B3SD Optoisolator Equivalent & Substitute Parts

Part Overview

The H11B3SD is an optoisolator with Darlington output and base connection, manufactured by onsemi. This component provides 5300Vrms isolation in a 6-SMD surface mount package. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and component procurement.

Substiute Parts

H11B3SD

onsemiIn Stock: 1176H11B3SD Datasheet

Current PartRFQ

4N30SM

Fairchild SemiconductorIn Stock: 222494N30SM Datasheet

SimilarRFQ

H11B1SR2M

onsemiIn Stock: 4411H11B1SR2M Datasheet

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H11B3SM

Isocom Components 2004 LTDIn Stock: 12443H11B3SM Datasheet

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H11B3SMT&R

Isocom Components 2004 LTDIn Stock: 817H11B3SMT&R Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the H11B3SD is determined by the following critical parameters: single-channel Darlington output configuration, 6-SMD surface mount package with gull wing leads, DC input type, and base connection availability. The substitute parts are grouped based on compatibility with these core electrical and mechanical specifications.

The allowed substitution parameters are:

• Number of Channels: 1
• Output Type: Darlington with Base
• Input Type: DC
• Package / Case: 6-SMD, Gull Wing
• Mounting Type: Surface Mount
• Voltage - Isolation: 4170Vrms or higher
• Voltage - Output (Max): 25V or higher
• Vce Saturation (Max): 1V or lower
• Operating Temperature range: must encompass or match the application requirement

Parameter Comparison

Engineering Selection Recommendations

H11B1SR2M is an active product from onsemi with equivalent mechanical compatibility and Darlington output configuration. This part maintains the same manufacturer lineage as the H11B3SD and carries ROHS3 compliance certification. The isolation voltage of 4170Vrms is lower than the original part; applications requiring 5300Vrms isolation must evaluate this reduction against circuit requirements.

4N30SM is an active product from Fairchild Semiconductor with identical package and output configuration. This part meets the mechanical and electrical interface requirements for direct substitution in applications where 4170Vrms isolation is acceptable.

H11B3SM and H11B3SMT&R are active products from Isocom Components 2004 LTD within the H11B series. Both parts share the same base product designation as the H11B3SD and maintain full mechanical compatibility. The isolation voltage specification differs in format (7.5Vpk versus Vrms rating); applications must verify isolation requirements against this specification difference. H11B3SM is supplied in tube packaging, while H11B3SMT&R is supplied in tape and reel format.

All substitute parts carry REACH Unaffected and EAR99 ECCN classifications matching the original part.

Frequently Asked Questions (FAQ)

Q: Can H11B1SR2M replace H11B3SD directly? A: H11B1SR2M is mechanically and functionally compatible as a Darlington optoisolator in 6-SMD package. The isolation voltage is 4170Vrms compared to 5300Vrms in the original part. Direct replacement is valid only if circuit isolation requirements do not exceed 4170Vrms.

Q: What is the difference between H11B3SM and H11B3SMT&R? A: Both parts are electrically identical. H11B3SM is supplied in tube packaging for manual handling, while H11B3SMT&R is supplied in tape and reel format for automated assembly. Package selection depends on assembly process requirements.

Q: Why does H11B3SM show 7.5Vpk isolation instead of Vrms? A: The isolation voltage specification format differs between manufacturers. 7.5Vpk represents peak voltage measurement, while other parts specify Vrms (root mean square). Direct numerical comparison requires conversion between these measurement standards.

Q: Is H11B1SR2M suitable for applications requiring -55°C operation? A: H11B1SR2M operates from -40°C to 100°C. Applications requiring -55°C minimum operating temperature must use H11B3SM, H11B3SMT&R, or the original H11B3SD specification.

Q: Are all substitute parts RoHS compliant? A: H11B1SR2M, H11B3SM, and H11B3SMT&R carry ROHS3 compliance certification. 4N30SM compliance status is not specified in the provided data.