MOC256R2M Equivalent & Substitute Parts

Part Overview

The MOC256R2M is an optoisolator transistor with base output manufactured by onsemi, designed for applications requiring galvanic isolation up to 2500Vrms. This component features a single-channel configuration in an 8-SOIC surface mount package and is currently in active production status. The MOC256R2M serves critical isolation functions in industrial control, power management, and signal conditioning applications where AC or DC input isolation is required.

Substitute parts become necessary when the primary component experiences supply constraints, end-of-life transitions, or when design requirements permit higher isolation voltage ratings or extended operating temperature ranges.

Substiute Parts

MOC256R2M

onsemiIn Stock: 12141MOC256R2M Datasheet

Current PartRFQ

IL256AT

Vishay Semiconductor Opto DivisionIn Stock: 6743IL256AT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

The IL256AT from Vishay Semiconductor Opto Division qualifies as a substitute for the MOC256R2M based on the following alignment criteria:

Matching Parameters:

• Single-channel optoisolator configuration
• Transistor with base output topology
• 8-SOIC surface mount package (0.154", 3.90mm Width)
• Current Transfer Ratio (Min): 20% @ 10mA
• Voltage - Output (Max): 30V
• Voltage - Forward (Vf) (Typ): 1.2V
• Current - DC Forward (If) (Max): 60 mA
• Vce Saturation (Max): 400mV
• AC/DC input type compatibility
• ROHS3 Compliant
• Moisture Sensitivity Level 1 (Unlimited)

Differentiation Parameters:

• IL256AT provides higher isolation voltage (4000Vrms vs. 2500Vrms)
• IL256AT supports extended lower operating temperature (-55°C vs. -40°C minimum)
• IL256AT is in Last Time Buy status (production phase-out)
• IL256AT output current specification not provided in available data

The IL256AT represents a higher-specification alternative suitable for designs requiring enhanced isolation margins or broader temperature operating ranges.

Parameter Comparison

Engineering Selection Recommendations

MOC256R2M Selection Criteria:

• Primary choice for new designs requiring active production status and long-term availability
• Suitable for applications with isolation voltage requirements up to 2500Vrms
• Recommended for operating temperature ranges from -40°C to 100°C
• Preferred when supply chain continuity is a design requirement

IL256AT Selection Criteria:

• Applicable for designs requiring higher isolation voltage margin (4000Vrms)
• Suitable for extended low-temperature operation (-55°C minimum)
• Acceptable for existing designs currently using IL256AT where inventory permits
• Not recommended for new production designs due to Last Time Buy status

Both components maintain ROHS3 compliance and identical electrical characteristics for core isolation and switching parameters, ensuring functional compatibility within the specified parameter envelope.

Frequently Asked Questions (FAQ)

Q: Can IL256AT directly replace MOC256R2M in existing designs? A: Yes, within the constraint that IL256AT output current specification is not provided in available documentation. The IL256AT provides higher isolation voltage (4000Vrms vs. 2500Vrms) and extended low-temperature operation (-55°C vs. -40°C), making it functionally compatible for applications within the MOC256R2M's original design envelope.

Q: What is the primary difference between these optoisolators? A: The IL256AT provides 4000Vrms isolation voltage compared to the MOC256R2M's 2500Vrms, and supports operation down to -55°C versus -40°C. All other electrical parameters including current transfer ratio, output voltage, forward voltage, and saturation voltage are identical.

Q: Are both parts available in the same package? A: Yes, both MOC256R2M and IL256AT are supplied in 8-SOIC surface mount packages with identical dimensions (0.154", 3.90mm Width), ensuring PCB layout compatibility.

Q: What is the significance of IL256AT's Last Time Buy status? A: Last Time Buy status indicates the manufacturer is discontinuing production. IL256AT should not be selected for new designs requiring long-term component availability. MOC256R2M, with Active status, is the appropriate choice for new production designs.

Q: Are there compliance differences between these parts? A: No, both components are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited) and REACH Unaffected status, ensuring equivalent regulatory compliance for industrial and commercial applications.

Q: Can these parts be used interchangeably in high-isolation applications? A: IL256AT's higher isolation rating (4000Vrms) provides additional safety margin in high-voltage isolation applications. However, MOC256R2M's 2500Vrms rating is sufficient for applications designed within that specification. Substitution direction (MOC256R2M to IL256AT) is acceptable; reverse substitution requires design verification.