IL252-X009 Equivalent & Substitute Parts

Part Overview

The IL252-X009 is an optoisolator transistor with base output manufactured by Vishay Semiconductor Opto Division. This component provides 5300Vrms isolation voltage in a single-channel configuration with 6-SMD surface mount packaging. The part is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Substitute components must maintain functional compatibility across isolation voltage, output type, channel configuration, and physical packaging specifications.

Key Parameters

Parameter	IL252-X009
Manufacturer	Vishay Semiconductor Opto Division
Category	Optoisolators
Product Status	Obsolete
Number of Channels	1
Voltage - Isolation	5300Vrms
Current Transfer Ratio (Min)	100% @ 10mA
Output Type	Transistor with Base
Voltage - Output (Max)	30V
Voltage - Forward (Vf) (Typ)	1.2V
Current - DC Forward (If) (Max)	60 mA
Vce Saturation (Max)	400mV
Operating Temperature	-55°C ~ 100°C
Mounting Type	Surface Mount
Package / Case	6-SMD, Gull Wing
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the IL252-X009 are selected based on the following critical parameters:

Single Channel Configuration: All substitutes maintain 1-channel optoisolator architecture
Transistor with Base Output: Output stage topology must match the original design
Surface Mount 6-SMD Gull Wing Package: Physical form factor compatibility for PCB assembly
Isolation Voltage Compatibility: Substitutes operate at isolation voltages of 4170Vrms, 7500Vpk, or 7.5Vpk
Current Transfer Ratio: Substitutes range from 10% to 100% @ 10mA, with higher ratios providing direct functional equivalence
Output Voltage and Current Ratings: Maximum output voltage 30V-35V and output current 50mA across all substitutes
RoHS3 Compliance: All substitutes maintain environmental compliance standards
MSL Rating: All substitutes rated MSL 1 (Unlimited) for moisture sensitivity

The IL252-X009 with 100% current transfer ratio at 10mA isolation voltage of 5300Vrms represents a high-performance optoisolator. Direct functional equivalents include H11AA4SM, H11AA4SR2VM, and H11AA4SMT&R, all featuring 100% current transfer ratio with 4170Vrms isolation. Alternative substitutes with lower current transfer ratios (10%-50%) are available for applications with less stringent isolation or switching requirements.

Parameter Comparison

Parameter	IL252-X009	H11AA1SM	H11AA1SMT&R	H11AA1SR2VM	H11AA2SM	H11AA2SMT&R	H11AA3SM	H11AA3SMT&R	H11AA4SM	H11AA4SMT&R	H11AA4SR2VM
Manufacturer	Vishay	onsemi	Isocom	onsemi	onsemi	Isocom	onsemi	Isocom	onsemi	Isocom	onsemi
Product Status	Obsolete	Active	Active	Active	Obsolete	Active	Obsolete	Active	Active	Active	Active
Number of Channels	1	1	1	1	1	1	1	1	1	1	1
Voltage - Isolation	5300Vrms	4170Vrms	7.5Vpk	4170Vrms	7500Vpk	7.5Vpk	7500Vpk	7.5Vpk	4170Vrms	7.5Vpk	4170Vrms
Current Transfer Ratio (Min)	100% @ 10mA	20% @ 10mA	20% @ 10mA	20% @ 10mA	10% @ 10mA	10% @ 10mA	50% @ 10mA	50% @ 10mA	100% @ 10mA	100% @ 10mA	100% @ 10mA
Output Type	Transistor with Base	Transistor with Base	Transistor with Base	Transistor with Base	Transistor with Base	Transistor with Base	Transistor with Base	Transistor with Base	Transistor with Base	Transistor with Base	Transistor with Base
Voltage - Output (Max)	30V	30V	35V	30V	30V	35V	30V	35V	30V	35V	30V
Current - Output / Channel	—	50mA	50mA	50mA	50mA	50mA	50mA	50mA	50mA	50mA	50mA
Voltage - Forward (Vf) (Typ)	1.2V	1.17V	1.2V	1.17V	1.17V	1.2V	1.17V	1.2V	1.17V	1.2V	1.17V
Current - DC Forward (If) (Max)	60 mA	60 mA	50 mA	60 mA	60 mA	50 mA	60 mA	50 mA	60 mA	50 mA	60 mA
Vce Saturation (Max)	400mV	400mV	400mV	400mV	400mV	400mV	400mV	400mV	400mV	400mV	400mV
Operating Temperature	-55°C ~ 100°C	-40°C ~ 100°C	-30°C ~ 100°C	-40°C ~ 100°C	-40°C ~ 100°C	-30°C ~ 100°C	-40°C ~ 100°C	-30°C ~ 100°C	-40°C ~ 100°C	-30°C ~ 100°C	-40°C ~ 100°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	6-SMD, Gull Wing	6-SMD, Gull Wing	6-SMD, Gull Wing	6-SMD, Gull Wing	6-SMD, Gull Wing	6-SMD, Gull Wing	6-SMD, Gull Wing	6-SMD, Gull Wing	6-SMD, Gull Wing	6-SMD, Gull Wing	6-SMD, Gull Wing
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitutes (100% Current Transfer Ratio)

H11AA4SM, H11AA4SMT&R, and H11AA4SR2VM are the closest functional equivalents to IL252-X009. All three maintain 100% current transfer ratio @ 10mA and are currently in active production status. H11AA4SR2VM offers the highest inventory availability (17,200 pcs) and is supplied in Tape & Reel packaging for automated assembly. H11AA4SM is available in Tube packaging (12,400 pcs). H11AA4SMT&R is supplied by Isocom Components in Tape & Reel format (1,080 pcs). These three parts operate at 4170Vrms isolation voltage, which is lower than the original 5300Vrms specification but sufficient for most applications requiring high current transfer efficiency.

Secondary Substitutes (50% Current Transfer Ratio)

H11AA3SM and H11AA3SMT&R provide 50% current transfer ratio @ 10mA. H11AA3SM is obsolete but maintains 2,280 pcs inventory. H11AA3SMT&R is active with 971 pcs available. These parts operate at 7500Vpk isolation voltage and are suitable for applications where moderate switching performance is acceptable.

Alternative Substitutes (10%-20% Current Transfer Ratio)

H11AA1SM, H11AA1SMT&R, H11AA1SR2VM, H11AA2SM, and H11AA2SMT&R provide lower current transfer ratios (10%-20% @ 10mA). H11AA1SR2VM offers the highest inventory (2,200 pcs) among the 20% CTR options. H11AA2SM is obsolete. These parts are suitable only for applications with relaxed switching requirements or where external base drive circuitry compensates for lower current transfer efficiency.

All active substitutes maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with modern manufacturing and storage requirements.

Frequently Asked Questions (FAQ)

Q: Can H11AA4SR2VM directly replace IL252-X009 in existing designs?

A: H11AA4SR2VM is functionally compatible as a direct replacement. Both parts feature 100% current transfer ratio @ 10mA, single-channel transistor-with-base output, 6-SMD Gull Wing surface mount packaging, and identical Vce saturation (400mV) and output voltage ratings (30V). The primary difference is isolation voltage: H11AA4SR2VM operates at 4170Vrms versus IL252-X009 at 5300Vrms. For applications requiring 5300Vrms isolation, H11AA4SR2VM is not suitable.

Q: What is the difference between H11AA4SM and H11AA4SR2VM?

A: Both parts are manufactured by onsemi with identical electrical specifications: 100% current transfer ratio @ 10mA, 4170Vrms isolation, 30V maximum output voltage, and 400mV Vce saturation. The primary difference is packaging: H11AA4SM is supplied in Tube format, while H11AA4SR2VM is supplied in Tape & Reel (TR) format. H11AA4SR2VM is preferred for high-volume automated assembly due to reel packaging compatibility.

Q: Why do some substitutes show lower isolation voltage (7.5Vpk) compared to IL252-X009 (5300Vrms)?

A: Isolation voltage specifications use different measurement standards. Vrms (root mean square) and Vpk (peak voltage) represent different electrical characterizations. Parts specified at 7.5Vpk (such as H11AA1SMT&R, H11AA2SMT&R, H11AA3SMT&R, and H11AA4SMT&R from Isocom) operate at significantly lower isolation levels than the original IL252-X009. These parts are suitable only for low-voltage isolation applications.

Q: Is H11AA1SM suitable for high-speed switching applications?

A: H11AA1SM features 20% current transfer ratio @ 10mA, which is substantially lower than IL252-X009 (100%). This lower CTR results in reduced switching speed and requires higher input current to achieve equivalent output performance. H11AA1SM is suitable only for applications with relaxed switching speed requirements or where external base drive circuitry is implemented.

Q: What packaging options are available for IL252-X009 substitutes?

A: Substitute parts are available in three packaging formats: Tube (H11AA4SM), Tape & Reel (H11AA4SR2VM, H11AA1SR2VM, H11AA1SMT&R, H11AA2SMT&R, H11AA3SMT&R, H11AA4SMT&R), and unspecified packaging (H11AA1SM, H11AA2SM, H11AA3SM). Tape & Reel format is standard for automated PCB assembly. Tube packaging is used for manual assembly or lower-volume applications.

Q: Are all substitutes RoHS3 compliant?

A: All listed substitute parts maintain ROHS3 compliance, matching the environmental standards of IL252-X009. All parts also carry MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard storage and handling procedures.

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