MOC3082SM Equivalent & Substitute Parts

Part Overview

The MOC3082SM is an optoisolator with triac output manufactured by onsemi, designed for applications requiring galvanic isolation with AC switching capability. This component features a 4170Vrms isolation voltage rating, zero-crossing detection circuit, and surface mount packaging in 6-SMD configuration. The part is currently active in production with full RoHS3 compliance and unlimited moisture sensitivity rating. Equivalent and substitute parts are identified to support procurement flexibility, design redundancy, and supply chain continuity.

Substiute Parts

MOC3082SM

onsemiIn Stock: 1450MOC3082SM Datasheet

Current PartRFQ

IL4108-X017

Vishay Semiconductor Opto DivisionIn Stock: 2959IL4108-X017 Datasheet

SimilarRFQ

IL4118-X007T

Vishay Semiconductor Opto DivisionIn Stock: 3874IL4118-X007T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MOC3082SM are qualified based on the following criteria:

Functional Equivalence: All substitute parts maintain triac output configuration with zero-crossing detection circuit, ensuring compatibility in AC switching applications.

Isolation Voltage: Substitute parts must meet or exceed the 4170Vrms isolation requirement. Both IL4108-X017 and IL4118-X007T provide 5300Vrms isolation, exceeding the minimum specification.

Package Compatibility: All substitute parts use 6-SMD surface mount packaging, maintaining mechanical and electrical footprint compatibility.

Electrical Parameters: Substitute parts must support the same operating voltage ranges (800V off-state), forward voltage characteristics (1.16V–1.3V typical), and DC forward current (60mA maximum).

Compliance and Certifications: All parts maintain ROHS3 compliance, unlimited moisture sensitivity rating (MSL 1), and active product status.

Packaging Format Consideration: IL4118-X007T is supplied in Tape & Reel format, while IL4108-X017 is supplied in Tube format, matching the original MOC3082SM tube packaging.

Parameter Comparison

Engineering Selection Recommendations

IL4108-X017 Selection: This part is suitable for direct substitution in applications where tube packaging is required. It provides enhanced isolation voltage (5300Vrms vs. 4170Vrms), superior dV/dt rating (10kV/µs vs. 600V/µs), and lower LED trigger current (2mA vs. 10mA). Extended operating temperature range (-55°C to 100°C) supports wider environmental applications. Approval agencies include CSA, UR, and VDE.

IL4118-X007T Selection: This part is suitable for substitution in applications where tape and reel packaging is acceptable for automated assembly. It provides the same enhanced isolation voltage and dV/dt performance as IL4108-X017, with the lowest LED trigger current (1.3mA) and reduced hold current (200µA). Extended operating temperature range and comprehensive approval certifications (BSI, CSA, cUR, FIMKO, UR) support demanding industrial applications.

Compliance Basis: All three parts maintain ROHS3 compliance, unlimited moisture sensitivity rating, and active product status. Selection between substitute parts depends on packaging format requirements and assembly methodology rather than electrical performance, as both Vishay parts exceed the electrical specifications of the MOC3082SM.

Frequently Asked Questions (FAQ)

Q: Can IL4108-X017 or IL4118-X007T be used as direct replacements for MOC3082SM?

A: Yes. Both parts are functionally equivalent for triac output optoisolator applications. They maintain the same 6-SMD package footprint, zero-crossing detection circuit, and electrical operating parameters. The substitute parts exceed the isolation voltage and dV/dt specifications of the MOC3082SM, making them suitable for the same circuit topologies.

Q: What is the difference between IL4108-X017 and IL4118-X007T?

A: Both parts are electrically equivalent with identical isolation voltage (5300Vrms) and dV/dt ratings (10kV/µs). The primary differences are: IL4108-X017 is supplied in Tube packaging with 2mA maximum LED trigger current, while IL4118-X007T is supplied in Tape & Reel format with 1.3mA maximum LED trigger current and lower hold current (200µA vs. 500µA). Select based on packaging format requirements for your assembly process.

Q: Are there temperature range considerations for substitution?

A: The MOC3082SM operates from -40°C to 85°C. Both substitute parts extend this range to -55°C to 100°C, providing additional thermal margin. If your application operates within the original -40°C to 85°C range, both substitutes are fully compatible. Extended temperature capability of substitute parts does not introduce compatibility issues.

Q: What are the LED trigger current implications?

A: The MOC3082SM requires 10mA maximum LED trigger current. IL4108-X017 requires 2mA, and IL4118-X007T requires 1.3mA. Lower trigger current in substitute parts reduces input circuit power consumption and allows use of higher input impedance drive circuits. Existing drive circuits designed for 10mA will operate reliably with lower-current parts.

Q: Do packaging format differences affect electrical performance?

A: No. Tube and Tape & Reel packaging formats are supply chain and assembly methodology distinctions only. Electrical performance, isolation voltage, dV/dt rating, and all functional parameters are identical between IL4108-X017 (Tube) and IL4118-X007T (Tape & Reel). Select packaging format based on your assembly equipment and procurement workflow.

Q: Are all parts RoHS3 compliant?

A: Yes. MOC3082SM, IL4108-X017, and IL4118-X007T are all ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1). All parts meet the same environmental and regulatory requirements.