MOC208M Equivalent & Substitute Parts

Part Overview

The MOC208M is an optoisolator transistor with base output manufactured by onsemi, rated for 2500Vrms isolation voltage in an 8-SOIC surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. The MOC208M provides 1-channel optoisolation with transistor output and base connection, suitable for applications requiring galvanic isolation with moderate voltage ratings and switching speeds.

Substiute Parts

MOC208M

onsemiIn Stock: 12720MOC208M Datasheet

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MOC206M

Fairchild SemiconductorIn Stock: 29683MOC206M Datasheet

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IL215AT

Vishay Semiconductor Opto DivisionIn Stock: 1679IL215AT Datasheet

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IL216AT

Vishay Semiconductor Opto DivisionIn Stock: 1472IL216AT Datasheet

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VO206AT

Vishay Semiconductor Opto DivisionIn Stock: 753VO206AT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the MOC208M is determined by the following critical parameters:

Primary Compatibility Criteria:

• Package / Case: 8-SOIC form factor (0.154", 3.90mm Width)
• Output Type: Transistor with Base configuration
• Mounting Type: Surface Mount
• Input Type: DC
• Vce Saturation (Max): 400mV

Secondary Compatibility Criteria:

• Voltage - Isolation: Equal to or greater than 2500Vrms
• Current Transfer Ratio: Minimum 20% @ specified current
• Operating Temperature Range: Must encompass or exceed -40°C ~ 100°C
• Voltage - Output (Max): Equal to or greater than 70V
• Current - Output / Channel: Equal to or greater than 150mA

The substitute parts listed below meet these criteria within their specified electrical and mechanical parameters. MOC206M is classified as an active product from Fairchild Semiconductor. IL215AT, IL216AT, and VO206AT are active products from Vishay Semiconductor Opto Division, offering higher isolation voltage ratings (4000Vrms) while maintaining 8-SOIC packaging and transistor-with-base output configuration.

Parameter Comparison

Engineering Selection Recommendations

MOC206M (Fairchild Semiconductor): This substitute maintains active product status and 8-SOIC packaging. Detailed electrical parameters are not fully specified in available data; engineering evaluation of isolation voltage and output current ratings is required before selection.

IL215AT (Vishay Semiconductor Opto Division): This substitute provides 4000Vrms isolation voltage, exceeding the MOC208M specification. It maintains 8-SOIC packaging and transistor-with-base output. The part is ROHS3 compliant and carries active product status. Output voltage is limited to 30V maximum, which is below the MOC208M's 70V rating. Current transfer ratio minimum is 20% @ 1mA. Output current rating is not specified.

IL216AT (Vishay Semiconductor Opto Division): This substitute provides 4000Vrms isolation voltage with 8-SOIC packaging and transistor-with-base output. It is ROHS3 compliant with active product status. Current transfer ratio minimum is 50% @ 1mA, providing higher gain than IL215AT. Output voltage is limited to 30V maximum. Output current rating is not specified. Operating temperature range extends to -55°C.

VO206AT (Vishay Semiconductor Opto Division): This substitute provides 4000Vrms isolation voltage and maintains 70V maximum output voltage, matching the MOC208M specification. It is ROHS3 compliant with active product status. Current transfer ratio is 63% to 125% @ 10mA, closely matching the MOC208M. Output current is rated at 50mA, which is lower than the MOC208M's 150mA. Operating temperature range matches the MOC208M at -40°C ~ 100°C.

Selection should prioritize active product status and ROHS3 compliance. VO206AT provides the closest electrical match to MOC208M specifications for isolation voltage and output voltage, though output current capacity is reduced. IL215AT and IL216AT offer higher isolation voltage with trade-offs in output voltage capability.

Frequently Asked Questions (FAQ)

Q: Can MOC206M directly replace MOC208M in existing designs? A: MOC206M maintains 8-SOIC packaging and transistor output configuration. However, complete electrical parameter specifications for MOC206M are not provided in available data. Isolation voltage, output voltage, and output current ratings must be confirmed against design requirements before substitution.

Q: What is the primary difference between IL215AT and IL216AT? A: Both parts provide 4000Vrms isolation in 8-SOIC packaging with transistor-with-base output. IL216AT specifies a higher current transfer ratio minimum of 50% @ 1mA compared to IL215AT's 20% @ 1mA. Operating temperature ranges are identical at -55°C ~ 100°C.

Q: Is VO206AT suitable for applications requiring 150mA output current? A: VO206AT is rated for 50mA maximum output current per channel, which is below the MOC208M's 150mA specification. Applications requiring 150mA output current cannot use VO206AT as a direct substitute.

Q: Do all substitute parts meet RoHS compliance requirements? A: IL215AT, IL216AT, and VO206AT are ROHS3 compliant. MOC206M RoHS status is not specified in available data. Compliance verification is required for MOC206M before use in RoHS-restricted applications.

Q: Are all substitute parts available in the same packaging options as MOC208M? A: All substitute parts are available in 8-SOIC surface mount packaging. Packaging options (Bulk, Tape & Reel, Cut Tape) vary by manufacturer and supplier. Verify packaging availability with component suppliers for procurement requirements.

Q: What is the isolation voltage advantage of Vishay parts over MOC208M? A: IL215AT, IL216AT, and VO206AT provide 4000Vrms isolation voltage, which is 1600Vrms higher than MOC208M's 2500Vrms rating. This provides additional safety margin in high-voltage isolation applications.

Q: Can MOC208M be used in new designs given its obsolete status? A: MOC208M is classified as obsolete. New designs should utilize active substitute parts such as IL215AT, IL216AT, VO206AT, or MOC206M to ensure long-term component availability and manufacturer support.