MOC3082TM Equivalent & Substitute Parts

Part Overview

The MOC3082TM is a triac output optoisolator manufactured by onsemi, designed for high-voltage isolation applications requiring zero-crossing detection. This component features 4170Vrms isolation voltage and is packaged in a 6-DIP through-hole configuration. The MOC3082TM is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications. Substitute parts must maintain functional compatibility across isolation voltage, triac output characteristics, zero-crossing circuit functionality, and through-hole DIP packaging.

Substiute Parts

MOC3082TM

onsemiIn Stock: 1021MOC3082TM Datasheet

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MOC3082TVM

Fairchild SemiconductorIn Stock: 8183MOC3082TVM Datasheet

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EL3081M

Everlight Electronics Co LtdIn Stock: 1071EL3081M Datasheet

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EL3082M

Everlight Electronics Co LtdIn Stock: 1118EL3082M Datasheet

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EL3083M

Everlight Electronics Co LtdIn Stock: 774EL3083M Datasheet

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Q3082

QT Brightek (QTB)In Stock: 921Q3082 Datasheet

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Q3083

QT Brightek (QTB)In Stock: 835Q3083 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following mandatory criteria:

• Output Type: Triac (required)
• Zero Crossing Circuit: Yes (required)
• Number of Channels: 1 (required)
• Mounting Type: Through Hole (required)
• Package / Case: 6-DIP configuration (required)
• Voltage - Isolation: Minimum 4170Vrms (required)
• Voltage - Off State: 800 V or greater (required)
• Static dV/dt (Min): 600V/µs or greater (required)
• Current - LED Trigger (Ift) (Max): 10mA or less (required for direct substitution)
• Current - DC Forward (If) (Max): 60 mA or greater (required)

Substitute parts are grouped into two categories:

Direct Equivalent: MOC3082TVM maintains identical electrical specifications and packaging dimensions, differing only in manufacturer and product status.

Compatible Substitutes: EL3081M, EL3082M, EL3083M, Q3082, and Q3083 meet all mandatory substitution criteria with enhanced isolation voltage (5000Vrms) and extended temperature ranges. These parts accommodate the MOC3082TM electrical requirements while offering improved performance margins.

Parameter Comparison

Engineering Selection Recommendations

MOC3082TVM is the primary direct equivalent for MOC3082TM replacement. It maintains identical electrical specifications and packaging dimensions while offering active product status from Fairchild Semiconductor. This part is suitable for direct socket replacement without circuit modification.

EL3082M provides the closest functional match among Everlight Electronics options, maintaining the 10mA LED trigger current specification of the original MOC3082TM while offering enhanced isolation voltage (5000Vrms), extended operating temperature range (-55°C to 100°C), and comprehensive international certifications (CSA, DEMKO, FIMKO, NEMKO, SEMKO, UL). The 6-DIP package maintains the 0.400" (10.16mm) pitch of the original part.

EL3081M and EL3083M are functionally compatible alternatives with differing LED trigger current specifications (15mA and 5mA respectively). Both offer the same enhanced isolation voltage and temperature range as EL3082M.

Q3082 and Q3083 from QT Brightek meet all electrical substitution criteria with 5000Vrms isolation and extended temperature range. However, these parts feature a 6-DIP package with 0.300" (7.62mm) pitch, requiring PCB layout verification before implementation. Q3082 maintains 10mA LED trigger current; Q3083 features 5mA trigger current.

For applications requiring UL certification, MOC3082TVM, EL3082M, EL3081M, and EL3083M are all UL-approved. For applications requiring VDE certification, Q3082 and Q3083 are VDE-approved alternatives.

Frequently Asked Questions (FAQ)

Q: Can MOC3082TVM be used as a direct replacement for MOC3082TM?

A: Yes. MOC3082TVM maintains identical electrical specifications, isolation voltage (4170Vrms), off-state voltage (800V), static dV/dt rating (600V/µs), LED trigger current (10mA), forward voltage (1.3V), and 6-DIP package dimensions (0.400", 10.16mm). No circuit modifications are required.

Q: What is the primary difference between MOC3082TM and the Everlight Electronics substitutes?

A: Everlight parts (EL3081M, EL3082M, EL3083M) offer higher isolation voltage (5000Vrms versus 4170Vrms), extended operating temperature range (-55°C to 100°C versus -40°C to 85°C), and broader international certifications. All maintain the same 6-DIP package pitch (0.400", 10.16mm) and triac output with zero-crossing detection.

Q: Can Q3082 or Q3083 be used as substitutes?

A: Q3082 and Q3083 meet all electrical substitution criteria and offer enhanced isolation voltage and temperature range. However, these parts feature a 6-DIP package with 0.300" (7.62mm) pitch instead of the 0.400" (10.16mm) pitch of the original MOC3082TM. PCB layout compatibility must be verified before implementation.

Q: What is the difference between EL3082M and EL3083M?

A: Both parts are functionally identical except for LED trigger current specification. EL3082M has a maximum LED trigger current of 10mA (matching MOC3082TM), while EL3083M has a maximum of 5mA. Both maintain 5000Vrms isolation voltage and identical hold current (280µA typical).

Q: Which substitute part offers the best compliance coverage?

A: Everlight Electronics parts (EL3081M, EL3082M, EL3083M) provide the broadest approval agency coverage, including CSA, DEMKO, FIMKO, NEMKO, SEMKO, and UL certifications. These parts are suitable for applications requiring multiple regional compliance standards.

Q: Are all substitute parts RoHS compliant?

A: EL3081M, EL3082M, EL3083M, Q3082, and Q3083 are all ROHS3 compliant. MOC3082TVM RoHS status is not specified in available documentation.

Q: What is the significance of the zero-crossing circuit in these optoisolators?

A: The zero-crossing circuit ensures triac switching occurs at the AC voltage zero-crossing point, minimizing electromagnetic interference and reducing switching stress on connected loads. All listed substitute parts maintain this functionality.