H11D3 Optoisolator Equivalent & Substitute Parts

Part Overview

The H11D3 is a transistor output optoisolator manufactured by onsemi, designed for high-voltage isolation applications requiring 5300Vrms isolation rating. This component features a single channel with transistor output and base connection in a 6-DIP package. The H11D3 is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and procurement planning. Substitute parts must maintain compatibility across isolation voltage, output characteristics, package form factor, and electrical performance parameters.

Substiute Parts

H11D3

onsemiIn Stock: 19196H11D3 Datasheet

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H11D3M

onsemiIn Stock: 1623H11D3M Datasheet

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H11D3

Fairchild SemiconductorIn Stock: 19228H11D3 Datasheet

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H11D3

Fairchild SemiconductorIn Stock: 19228H11D3 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the H11D3 is determined by the following critical parameters:

• Isolation Voltage: Minimum 5300Vrms required for direct substitution
• Output Configuration: Transistor with base output mandatory
• Package Form Factor: 6-DIP (0.300", 7.62mm) required for PCB compatibility
• Number of Channels: Single channel only
• Output Voltage Rating: 200V maximum output voltage
• Output Current Capacity: 100mA per channel minimum
• Current Transfer Ratio: 20% @ 10mA minimum
• Vce Saturation: 400mV maximum

The H11D3 has two identified substitute options: the H11D3M from onsemi and the H11D3 from Fairchild Semiconductor. These parts are grouped based on their ability to meet the electrical and mechanical requirements specified above.

Parameter Comparison

Engineering Selection Recommendations

H11D3M (onsemi) is the primary recommended substitute. This part is currently in active product status with ROHS3 compliance certification. The H11D3M maintains identical electrical performance across all critical parameters including current transfer ratio, output voltage rating, output current capacity, and Vce saturation. The isolation voltage is reduced to 4170Vrms, which represents a lower isolation rating than the original H11D3. The operating temperature range is narrowed to -40°C ~ 100°C compared to the original -55°C ~ 100°C specification. Selection of the H11D3M is appropriate for applications where the reduced isolation voltage and narrower temperature range are acceptable within system design margins.

H11D3 (Fairchild Semiconductor) is an alternative substitute option. This part maintains the original 5300Vrms isolation voltage and -55°C ~ 100°C operating temperature range. The part carries ROHS3 compliance certification. However, this component is classified as obsolete, limiting long-term procurement viability. The turn-on and turn-off times differ slightly from the onsemi version (2.5µs and 5.5µs respectively versus 5µs for both parameters in the onsemi H11D3), and the forward current specification is reduced to 60mA maximum compared to 80mA in the original part.

For new designs or long-term production requirements, the H11D3M from onsemi is the preferred selection due to active product status and ROHS3 compliance. For applications requiring the original isolation voltage specification and temperature range, the Fairchild H11D3 provides electrical equivalence, though procurement constraints associated with obsolete status should be considered.

Frequently Asked Questions (FAQ)

Q: Can the H11D3M be used as a direct replacement for the H11D3?

A: The H11D3M is electrically compatible for most applications. The primary difference is the reduced isolation voltage rating of 4170Vrms compared to 5300Vrms in the original H11D3. Applications operating at isolation voltages below 4170Vrms can use the H11D3M without modification. Applications requiring the full 5300Vrms isolation specification must use the Fairchild H11D3 or identify alternative components with matching isolation ratings.

Q: What is the impact of the narrower operating temperature range in the H11D3M?

A: The H11D3M operates from -40°C to 100°C, compared to -55°C to 100°C for the original H11D3. If your application requires operation below -40°C, the H11D3M is not suitable. For applications within the -40°C to 100°C range, the H11D3M meets all temperature requirements.

Q: Are both substitute parts pin-compatible with the original H11D3?

A: Yes. Both the H11D3M and Fairchild H11D3 use the 6-DIP (0.300", 7.62mm) package with identical pinout and through-hole mounting configuration. No PCB modifications are required for physical substitution.

Q: What is the significance of the ROHS3 compliance on the H11D3M?

A: ROHS3 compliance indicates the H11D3M meets Restriction of Hazardous Substances Directive requirements, restricting the use of specific hazardous materials in electrical and electronic equipment. This certification is relevant for applications subject to environmental and regulatory compliance requirements in the European Union and other regions with equivalent standards.

Q: Why is the original H11D3 classified as obsolete?

A: Obsolete status indicates the component is no longer in active production. The H11D3M represents the active replacement in the onsemi product line, offering improved compliance certifications and ongoing manufacturing support.

Q: Can the Fairchild H11D3 be used if the H11D3M is unavailable?

A: The Fairchild H11D3 provides electrical equivalence with identical isolation voltage and operating temperature specifications. However, procurement of obsolete components may present supply chain challenges. The Fairchild H11D3 is suitable as a secondary option when the H11D3M is unavailable and application requirements match the original H11D3 specifications.