MOC8101S Optoisolator Equivalent & Substitute Parts

Part Overview

The MOC8101S is a 6-SMD surface mount optoisolator with transistor output, rated for 5300Vrms isolation voltage. Manufactured by onsemi, this component is classified as obsolete, necessitating identification of active equivalent parts for new designs and production continuity. The MOC8101S provides single-channel isolation with 50mA output current capability and operates across the -55°C to 100°C temperature range, making it suitable for industrial and automotive isolation applications.

Substiute Parts

MOC8101S

onsemiIn Stock: 744MOC8101S Datasheet

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CNY17F1SM

onsemiIn Stock: 12811CNY17F1SM Datasheet

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MOC8101-X017T

Vishay Semiconductor Opto DivisionIn Stock: 2398MOC8101-X017T Datasheet

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MOC8101SM

Isocom Components 2004 LTDIn Stock: 2258MOC8101SM Datasheet

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MOC8101SMT&R

Isocom Components 2004 LTDIn Stock: 1071MOC8101SMT&R Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MOC8101S is determined by the following critical parameters:

• Isolation Voltage: Minimum 5300Vrms required for direct substitution
• Output Configuration: Transistor output type mandatory
• Number of Channels: Single channel only
• Package Type: 6-SMD, Gull Wing surface mount
• Current Rating: 50mA output current minimum
• Maximum Output Voltage: 30V or higher
• Operating Temperature Range: Must encompass -55°C to 100°C or be compatible with application requirements
• Vce Saturation: 400mV or lower

Based on these criteria, the substitute parts are grouped as follows:

Group 1 - Direct Electrical Equivalents (5300Vrms Isolation):

• MOC8101-X017T (Vishay Semiconductor Opto Division)
• MOC8101SM (Isocom Components 2004 LTD)
• MOC8101SMT&R (Isocom Components 2004 LTD)

Group 2 - Functional Alternative (Lower Isolation Voltage):

• CNY17F1SM (onsemi) - 4170Vrms isolation, suitable for applications not requiring 5300Vrms

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (5300Vrms Isolation Required):

MOC8101-X017T is the primary recommended substitute. Manufactured by Vishay Semiconductor Opto Division, this part maintains identical isolation voltage (5300Vrms), output voltage rating (30V), and operating temperature range (-55°C to 100°C). It carries ROHS3 compliance and active product status, ensuring long-term availability. The part is available in Tape & Reel packaging with 2300 units in stock.

MOC8101SM and MOC8101SMT&R, both from Isocom Components 2004 LTD, are functionally equivalent alternatives with the same 6-SMD package and electrical ratings. These parts are active products with ROHS3 compliance. MOC8101SM is supplied in Tube packaging, while MOC8101SMT&R is supplied in Tape & Reel format. Note that isolation voltage specifications for these parts are listed as 7.5Vpk rather than Vrms; engineering evaluation is required to confirm compatibility with 5300Vrms isolation requirements.

For Applications Accepting Lower Isolation Voltage (4170Vrms):

CNY17F1SM from onsemi provides a functional alternative where 4170Vrms isolation is acceptable. This part maintains the same output current (50mA), Vce saturation (400mV), and package configuration. It offers higher maximum output voltage (70V) and is ROHS3 compliant with active product status. The operating temperature range is -40°C to 100°C, which covers the MOC8101S range above -40°C.

All substitute parts maintain MSL 1 (Unlimited) moisture sensitivity rating and REACH Unaffected status, consistent with the original MOC8101S.

Frequently Asked Questions (FAQ)

Q: Can MOC8101SM and MOC8101SMT&R be used as direct replacements for MOC8101S?

A: These parts share the same 6-SMD package, output current rating (50mA), maximum output voltage (30V), Vce saturation (400mV), and operating temperature range (-55°C to 100°C). However, their isolation voltage is specified as 7.5Vpk rather than 5300Vrms. Engineering evaluation is required to determine if this specification difference affects your application's isolation requirements.

Q: What is the difference between MOC8101-X017T and MOC8101SM?

A: Both parts provide 5300Vrms isolation (MOC8101-X017T) or equivalent isolation specifications (MOC8101SM), identical output ratings, and the same 6-SMD package. The primary differences are manufacturer (Vishay vs. Isocom), packaging format (Tape & Reel vs. Tube), and inventory availability. MOC8101-X017T is recommended for new designs due to explicit 5300Vrms specification.

Q: Is CNY17F1SM suitable for my application?

A: CNY17F1SM is suitable only if your circuit design does not require 5300Vrms isolation. This part provides 4170Vrms isolation, which is approximately 79% of the MOC8101S rating. All other electrical parameters (output current, saturation voltage, package type) are compatible. Verify that your isolation voltage requirement can be met at 4170Vrms before selection.

Q: What packaging options are available for substitutes?

A: MOC8101-X017T is supplied in Tape & Reel (TR) format. MOC8101SM is supplied in Tube packaging. MOC8101SMT&R is supplied in Tape & Reel format. CNY17F1SM is supplied in Tube packaging. Select based on your production assembly requirements and volume.

Q: Are all substitute parts RoHS compliant?

A: Yes. MOC8101-X017T, MOC8101SM, MOC8101SMT&R, and CNY17F1SM are all ROHS3 compliant. The original MOC8101S does not specify RoHS status.

Q: What is the operating temperature difference between MOC8101S and CNY17F1SM?

A: MOC8101S operates from -55°C to 100°C. CNY17F1SM operates from -40°C to 100°C. If your application requires operation below -40°C, CNY17F1SM is not suitable. All other substitute parts maintain the full -55°C to 100°C range.