H11A4G Optoisolator Equivalent & Substitute Parts

Part Overview

The H11A4G is a single-channel optoisolator with transistor output and base connection, manufactured by Isocom Components 2004 LTD. This component provides galvanic isolation up to 7.5Vpk and is designed for DC input applications requiring transistor-based output control. The part is currently in active production status with 966 units available in stock. Alternative models become necessary when addressing specific inventory constraints, regional availability, or procurement lead time requirements while maintaining identical electrical and mechanical specifications.

Substiute Parts

H11A4G

Isocom Components 2004 LTDIn Stock: 1006H11A4G Datasheet

Current PartRFQ

H11A4XG

Isocom Components 2004 LTDIn Stock: 1325H11A4XG Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the H11A4G is determined by strict parametric equivalence across all critical electrical and mechanical specifications. The following parameters define the substitution criteria:

• Single-channel configuration with transistor output and base connection
• Isolation voltage of 7.5Vpk
• Current transfer ratio minimum of 10% @ 10mA
• Maximum output voltage of 30V
• Maximum output current of 50mA per channel
• Forward voltage of 1.2V typical
• Maximum forward current of 60mA
• Vce saturation maximum of 400mV
• Operating temperature range of -55°C to 100°C
• 6-DIP through-hole package (0.400", 10.16mm)
• ROHS3 compliance and MSL Level 1 rating

Parts meeting all these parameters are classified as parametric equivalents and direct substitutes.

Parameter Comparison

Engineering Selection Recommendations

The H11A4XG is a direct parametric equivalent to the H11A4G. Both components are manufactured by Isocom Components 2004 LTD within the H11A series and share identical electrical specifications, package configuration, and compliance certifications. Selection between these parts should be based on inventory availability and procurement lead times. The H11A4XG currently has 1219 units in stock compared to 966 units for the H11A4G, making it suitable for high-volume applications or situations requiring extended supply assurance. Both parts maintain ROHS3 compliance and MSL Level 1 rating, ensuring compatibility with standard manufacturing and storage conditions.

Frequently Asked Questions (FAQ)

Q: Can H11A4XG be used as a direct replacement for H11A4G in existing designs?

A: Yes. The H11A4XG is a parametric equivalent with identical electrical characteristics, isolation voltage, output specifications, and package configuration. No circuit modifications are required for substitution.

Q: Are there any differences in the 6-DIP package dimensions between these parts?

A: No. Both the H11A4G and H11A4XG use the same 6-DIP package with 0.400" (10.16mm) body width and identical pin configuration, ensuring mechanical compatibility on PCBs designed for either part number.

Q: Do both parts meet the same compliance and environmental standards?

A: Yes. Both components are ROHS3 compliant, carry MSL Level 1 rating, and are classified as REACH Unaffected with EAR99 export classification. They are suitable for identical application environments and regulatory requirements.

Q: What is the basis for substitution between H11A4G and H11A4XG?

A: Substitution is based on complete parametric equivalence across all specified electrical and mechanical parameters, including isolation voltage, current transfer ratio, output voltage and current ratings, saturation characteristics, operating temperature range, and package specifications.

Q: Are there inventory or lead time considerations when selecting between these parts?

A: The H11A4XG has higher current inventory (1219 units) compared to the H11A4G (966 units). For applications with extended procurement timelines or high-volume requirements, the H11A4XG may offer better availability assurance.