H11AA3TM Equivalent & Substitute Parts

Part Overview

The H11AA3TM is an optoisolator transistor with base output manufactured by onsemi, designed for high-voltage isolation applications. This component features a 7500Vpk isolation rating and single-channel transistor output configuration in a 6-DIP package. The product is currently classified as obsolete, making identification of functionally equivalent alternatives essential for design continuity and procurement planning.

Key Parameters

Parameter	Value
Manufacturer Part Number	H11AA3TM
Manufacturer	onsemi
Category	Optoisolators
Number of Channels	1
Voltage - Isolation	7500Vpk
Current Transfer Ratio (Min)	50% @ 10mA
Output Type	Transistor with Base
Voltage - Output (Max)	30V
Current - Output / Channel	50mA
Voltage - Forward (Vf) (Typ)	1.17V
Current - DC Forward (If) (Max)	60 mA
Vce Saturation (Max)	400mV
Operating Temperature Range	-40°C ~ 100°C
Mounting Type	Through Hole
Package / Case	6-DIP (0.400", 10.16mm)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the H11AA3TM is determined by the following critical parameters:

Isolation Voltage: Minimum 7500Vpk or equivalent rating
Output Configuration: Transistor with base output
Number of Channels: Single channel
Package Type: 6-DIP form factor
Current Transfer Ratio: Minimum 50% @ 10mA
Output Voltage Rating: 30V or higher
Output Current Capability: 50mA or higher
Vce Saturation: 400mV or lower
Input Type: AC, DC compatible
Mounting: Through Hole

The H11AA3G qualifies as a direct substitute based on matching isolation voltage (7.5Vpk specification aligns with the 7500Vpk rating), identical current transfer ratio (50% @ 10mA), matching output configuration, and compatible package dimensions. The H11AA1-X006 presents a partial alternative with lower isolation voltage (5300Vrms) and reduced current transfer ratio (20% @ 10mA), suitable only for applications with relaxed isolation requirements.

Parameter Comparison

Parameter	H11AA3TM (Main)	H11AA3G (Substitute)	H11AA1-X006 (Substitute)
Manufacturer	onsemi	Isocom Components 2004 LTD	Vishay Semiconductor Opto Division
Product Status	Obsolete	Active	Active
Number of Channels	1	1	1
Voltage - Isolation	7500Vpk	7.5Vpk	5300Vrms
Current Transfer Ratio (Min)	50% @ 10mA	50% @ 10mA	20% @ 10mA
Output Type	Transistor with Base	Transistor with Base	Transistor with Base
Voltage - Output (Max)	30V	35V	30V
Current - Output / Channel	50mA	50mA	Not specified
Voltage - Forward (Vf) (Typ)	1.17V	1.2V	1.2V
Current - DC Forward (If) (Max)	60 mA	50 mA	60 mA
Vce Saturation (Max)	400mV	400mV	400mV
Operating Temperature Range	-40°C ~ 100°C	-30°C ~ 100°C	-55°C ~ 100°C
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	6-DIP (0.400", 10.16mm)	6-DIP (0.400", 10.16mm)	6-DIP (0.300", 7.62mm)
Input Type	AC, DC	AC, DC	AC, DC
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

H11AA3G is the primary recommended substitute for the obsolete H11AA3TM. This component maintains active product status with Isocom Components 2004 LTD, meets all critical electrical parameters including isolation voltage, current transfer ratio, and output specifications, and is ROHS3 compliant. The package dimensions match exactly (6-DIP 0.400", 10.16mm), ensuring direct PCB compatibility. The operating temperature range (-30°C ~ 100°C) is slightly narrower than the original but covers standard industrial applications.

H11AA1-X006 from Vishay Semiconductor Opto Division serves as a secondary alternative for applications with reduced isolation voltage requirements. This part is active and ROHS3 compliant but features lower isolation voltage (5300Vrms) and reduced current transfer ratio (20% @ 10mA). The 6-DIP package dimension (0.300", 7.62mm) differs from the original, requiring PCB layout verification. This substitute is suitable only when isolation voltage and current transfer ratio specifications can be relaxed.

Frequently Asked Questions (FAQ)

Q: Can H11AA3G directly replace H11AA3TM without PCB modifications?

A: Yes. The H11AA3G maintains identical package dimensions (6-DIP 0.400", 10.16mm) and pin configuration, enabling direct substitution on existing PCBs designed for the H11AA3TM.

Q: What is the key difference between H11AA3G and H11AA1-X006?

A: The H11AA3G matches the original isolation voltage specification (7.5Vpk) and current transfer ratio (50% @ 10mA), while the H11AA1-X006 provides lower isolation voltage (5300Vrms) and reduced current transfer ratio (20% @ 10mA). Component selection depends on application isolation and signal transfer requirements.

Q: Is the H11AA1-X006 suitable for high-voltage isolation applications?

A: The H11AA1-X006 provides 5300Vrms isolation, which is lower than the original H11AA3TM specification of 7500Vpk. Use this substitute only in applications where reduced isolation voltage is acceptable.

Q: Are both substitute parts RoHS compliant?

A: Yes. Both H11AA3G and H11AA1-X006 are ROHS3 compliant and REACH unaffected, meeting modern environmental and regulatory standards.

Q: What is the impact of the H11AA1-X006 package dimension difference?

A: The H11AA1-X006 uses a 6-DIP package with 0.300" (7.62mm) spacing compared to the original 0.400" (10.16mm). This dimensional difference requires PCB layout verification to confirm mechanical compatibility with existing through-hole footprints.

Q: Which substitute should be selected for new designs?

A: The H11AA3G is recommended for new designs due to active product status, full parameter compatibility, and identical package dimensions. The H11AA1-X006 is suitable only when isolation voltage and current transfer ratio specifications can be reduced.

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