H11A5 Optoisolator Equivalent & Substitute Parts

Part Overview

The H11A5 is a 5000Vrms optoisolator transistor with base output in 6-DIP packaging, manufactured by Lite-On Inc. This component provides galvanic isolation for DC input signals with transistor output capability. The H11A5 is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

H11A5

Lite-On Inc.In Stock: 1301H11A5 Datasheet

Current PartRFQ

4N26M

onsemiIn Stock: 509034N26M Datasheet

MFR RecommendedRFQ

H11A5-V

Everlight Electronics Co LtdIn Stock: 761H11A5-V Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the H11A5 is determined by the following critical parameters:

• Isolation Voltage: Minimum 5000Vrms or equivalent
• Output Configuration: Transistor with base output
• Package: 6-DIP (0.300", 7.62mm) through-hole
• Number of Channels: Single channel
• Input Type: DC
• Output Voltage Rating: Minimum 30V capability
• Current Transfer Ratio: Minimum 20% @ 10mA
• Vce Saturation: Maximum 500mV acceptable

The H11A5-V from Everlight Electronics maintains identical isolation voltage (5000Vrms) and current transfer ratio (30% @ 10mA), providing direct functional equivalence. The 4N26M from onsemi operates at reduced isolation voltage (4170Vrms) with lower current transfer ratio (20% @ 10mA), suitable only where isolation requirements permit lower voltage operation.

Parameter Comparison

Engineering Selection Recommendations

H11A5-V (Everlight Electronics) is the primary substitute for the H11A5. Both components maintain 5000Vrms isolation voltage and 30% current transfer ratio. The H11A5-V is actively manufactured and ROHS3 compliant, providing long-term availability. The extended operating temperature range (-55°C ~ 110°C) and higher output voltage rating (80V) offer additional design margin.

4N26M (onsemi) is a secondary substitute applicable only in applications where 4170Vrms isolation voltage is acceptable. This component features lower current transfer ratio (20% @ 10mA) and higher Vce saturation (500mV), requiring circuit design verification. The 4N26M is actively manufactured and ROHS3 compliant with REACH unaffected status.

Frequently Asked Questions (FAQ)

Q: Can the H11A5-V directly replace the H11A5 in existing designs?

A: Yes. The H11A5-V maintains identical isolation voltage (5000Vrms), current transfer ratio (30% @ 10mA), Vce saturation (400mV), and 6-DIP package configuration. Pin-for-pin compatibility is maintained.

Q: What are the limitations of using 4N26M as a substitute?

A: The 4N26M operates at 4170Vrms isolation voltage, 830Vrms lower than the H11A5. Current transfer ratio is reduced to 20% @ 10mA. Vce saturation is 500mV compared to 400mV. These differences require circuit analysis to confirm suitability for the application.

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

A: Yes. All listed substitutes use 6-DIP (0.300", 7.62mm) through-hole packaging, maintaining mechanical compatibility with existing PCB layouts.

Q: What compliance certifications apply to substitute parts?

A: H11A5-V is ROHS3 compliant with MSL 1 (Unlimited). 4N26M is ROHS3 compliant and REACH unaffected. Both components carry EAR99 ECCN classification and 8541.49.8000 HTSUS code.

Q: Which substitute offers the best long-term availability?

A: H11A5-V from Everlight Electronics is the recommended choice for new designs requiring the H11A5 specification. Active product status and established manufacturing ensure sustained availability.