MOC8101SD Equivalent & Substitute Parts

Part Overview

The MOC8101SD is an optoisolator with transistor output manufactured by onsemi, featuring 5300Vrms isolation voltage in a 6-SMD surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The MOC8101SD provides single-channel DC input isolation with 50-80% current transfer ratio at 10mA and 50mA maximum output current, suitable for applications requiring high-voltage galvanic isolation with fast switching characteristics.

Substiute Parts

MOC8101SD

onsemiIn Stock: 4221MOC8101SD Datasheet

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CNY17F1SR2M

Fairchild SemiconductorIn Stock: 4475CNY17F1SR2M Datasheet

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H11A1SM

onsemiIn Stock: 2146H11A1SM 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 MOC8101SD is determined by the following critical parameters:

Primary Compatibility Criteria:

• Single-channel configuration
• 6-SMD surface mount package with gull wing leads
• Transistor output topology
• DC input type
• 30V maximum output voltage
• 50mA maximum output current per channel
• 400mV maximum Vce saturation
• Operating temperature range of -55°C to 100°C minimum

Isolation Voltage Consideration: The MOC8101SD specifies 5300Vrms isolation. Substitute parts with lower isolation voltage (4170Vrms) remain functionally compatible for applications not requiring the full 5300Vrms specification. Parts with equal or higher isolation voltage provide direct substitution without derating.

Current Transfer Ratio: Minimum CTR of 50% at 10mA is the baseline requirement. Substitute parts meeting or exceeding this specification are compatible.

Switching Performance: Turn-on and turn-off times of 2-3µs represent typical performance. Substitute parts with equal or faster switching characteristics maintain compatibility.

Parameter Comparison

Engineering Selection Recommendations

Direct Substitutes (Highest Compatibility):

MOC8101-X017T (Vishay Semiconductor Opto Division) is the primary direct substitute. It matches the MOC8101SD across all critical parameters: 5300Vrms isolation voltage, 50-80% CTR at 10mA, 2-3µs switching times, 30V output voltage, 50mA output current, and -55°C to 100°C operating range. This part is currently active and RoHS3 compliant.

Compatible Substitutes (Functional Equivalence with Parameter Variance):

H11A1SM (onsemi) provides functional substitution with the following considerations: isolation voltage is 4170Vrms (lower than MOC8101SD), output type includes base lead (transistor with base versus standard transistor), and operating temperature minimum is -40°C (versus -55°C). This part is active and RoHS3 compliant.

MOC8101SM and MOC8101SMT&R (Isocom Components 2004 LTD) share the MOC8101 base product number and maintain package compatibility. However, isolation voltage specification of 7.5Vpk differs significantly from the 5300Vrms specification of the MOC8101SD. These parts are active and RoHS3 compliant but require application-level verification of isolation requirements.

Limited Substitution (Parameter Derating Required):

CNY17F1SR2M (Fairchild Semiconductor) operates at 4170Vrms isolation voltage and 40% minimum CTR at 10mA, both lower than MOC8101SD specifications. Maximum output voltage is 70V (higher than MOC8101SD). Operating temperature range is -40°C to 100°C. This part is active but represents a derating scenario.

Frequently Asked Questions (FAQ)

Q: Can MOC8101-X017T directly replace MOC8101SD without circuit modification?

A: Yes. MOC8101-X017T matches all critical electrical and mechanical parameters of MOC8101SD: isolation voltage (5300Vrms), current transfer ratio (50-80% @ 10mA), switching times (2-3µs), output voltage (30V), output current (50mA), and operating temperature range (-55°C to 100°C). Both use 6-SMD gull wing packaging. No circuit modification is required.

Q: What is the key difference between H11A1SM and MOC8101SD?

A: H11A1SM features a transistor output with base lead, whereas MOC8101SD has standard transistor output without base access. Isolation voltage is lower (4170Vrms versus 5300Vrms), and minimum operating temperature is -40°C instead of -55°C. Applications requiring base-lead access or operating below -40°C require evaluation.

Q: Why do MOC8101SM and MOC8101SMT&R show 7.5Vpk isolation instead of 5300Vrms?

A: The isolation voltage specification differs in measurement units and methodology. These parts share the MOC8101 base product number but may represent a different product variant. Application-level verification of isolation requirements is necessary before substitution.

Q: Is CNY17F1SR2M suitable for applications requiring 5300Vrms isolation?

A: No. CNY17F1SR2M specifies 4170Vrms isolation, which is lower than the MOC8101SD requirement of 5300Vrms. This part is suitable only for applications with isolation requirements of 4170Vrms or lower. Additionally, minimum current transfer ratio is 40% versus 50% for MOC8101SD.

Q: Are all substitute parts RoHS3 compliant?

A: MOC8101-X017T, H11A1SM, MOC8101SM, and MOC8101SMT&R are RoHS3 compliant. CNY17F1SR2M RoHS status is not specified in available data. Verify compliance requirements for your application before selection.

Q: What packaging options are available for these substitute parts?

A: All substitute parts use 6-SMD surface mount package with gull wing leads, matching MOC8101SD. Packaging variants differ: MOC8101-X017T is supplied in Tape & Reel (TR), H11A1SM in Tube, CNY17F1SR2M in Bulk, MOC8101SM in Tube, and MOC8101SMT&R in Tape & Reel (TR). Select based on procurement and assembly requirements.