MCT66SM Equivalent & Substitute Parts

Part Overview

The MCT66SM is an optoisolator with transistor output manufactured by Isocom Components 2004 LTD. This dual-channel device provides 5300Vrms isolation and is designed for applications requiring galvanic isolation with DC input and transistor output switching. The part is currently active in production with 1162 units in stock. Substitute parts are identified when equivalent electrical and mechanical parameters allow direct replacement in circuit designs without functional compromise.

Substiute Parts

MCT66SM

Isocom Components 2004 LTDIn Stock: 1241MCT66SM Datasheet

Current PartRFQ

MCT66XSM

Isocom Components 2004 LTDIn Stock: 1246MCT66XSM Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The MCT66SM has one identified parametric equivalent: MCT66XSM. Substitution is valid based on the following criteria:

Electrical Parameters (Must Match):

• Number of Channels: 2
• Voltage - Isolation: 5300Vrms
• Current Transfer Ratio (Min): 6% @ 10mA
• Rise / Fall Time (Typ): 4µs, 3µs
• Input Type: DC
• Output Type: Transistor
• Voltage - Output (Max): 30V
• Current - Output / Channel: 50mA
• Voltage - Forward (Vf) (Typ): 1.5V (Max)
• Current - DC Forward (If) (Max): 50 mA
• Vce Saturation (Max): 400mV
• Operating Temperature: -25°C ~ 100°C

Mechanical Parameters (Must Match):

• Mounting Type: Surface Mount
• Package / Case: 8-SMD, Gull Wing
• Supplier Device Package: 8-SMD

Compliance Parameters (Must Match):

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)
• REACH Status: REACH Unaffected

Parameter Comparison

Engineering Selection Recommendations

Both MCT66SM and MCT66XSM are active products from Isocom Components 2004 LTD with identical electrical and mechanical specifications. Selection between these parts is based on availability and supply chain considerations rather than functional differences. Both parts meet ROHS3 compliance and REACH requirements, making them suitable for applications with environmental and regulatory constraints. The MSL rating of 1 (Unlimited) indicates no moisture sensitivity restrictions for either part.

Frequently Asked Questions (FAQ)

Q: Can MCT66XSM replace MCT66SM in existing designs? A: Yes. MCT66XSM is a parametric equivalent with identical electrical characteristics, isolation voltage, channel configuration, output specifications, and package format. Direct substitution is valid without circuit modification.

Q: Are there any differences in compliance or environmental ratings? A: No. Both parts carry identical ROHS3 compliance, REACH Unaffected status, and MSL rating of 1 (Unlimited). Environmental and regulatory requirements are equivalent.

Q: What are the key parameters that define substitution eligibility? A: Substitution is determined by matching: isolation voltage (5300Vrms), number of channels (2), current transfer ratio (6% @ 10mA), output type (Transistor), maximum output voltage (30V), maximum output current per channel (50mA), operating temperature range (-25°C ~ 100°C), and package format (8-SMD, Gull Wing).

Q: Is the 8-SMD Gull Wing package identical for both parts? A: Yes. Both MCT66SM and MCT66XSM use the same 8-SMD Gull Wing surface mount package with identical pin configuration and footprint requirements.

Q: What is the current transfer ratio specification? A: The minimum current transfer ratio is 6% at 10mA input current for both parts. This parameter defines the optical coupling efficiency between the LED input and transistor output stages.

Q: Are there any temperature operating range differences? A: No. Both parts operate across the identical temperature range of -25°C to 100°C.