MIC4451CT Equivalent & Substitute Parts

Part Overview

The MIC4451CT is a low-side gate driver IC manufactured by Microchip Technology, designed for driving IGBT and N-Channel MOSFET applications. The device features inverting input configuration with single-channel architecture in a TO-220-5 package. The MIC4451CT is classified as obsolete, making identification of compatible substitute parts essential for ongoing system support and new design implementations. Active equivalent models provide functional continuity while offering improved compliance status and availability.

Substiute Parts

MIC4451CT

Microchip TechnologyIn Stock: 2211MIC4451CT Datasheet

Current PartRFQ

MIC4451ZT

Microchip TechnologyIn Stock: 3400MIC4451ZT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MIC4451CT is determined by strict equivalence across the following critical parameters:

• Driven Configuration: Low-Side only
• Channel Type: Single channel
• Gate Type: IGBT and N-Channel MOSFET compatibility
• Voltage Supply Range: 4.5V ~ 18V
• Logic Voltage Levels: VIL 0.8V, VIH 2.4V
• Peak Output Current: 12A source and sink capability
• Input Type: Inverting configuration
• Timing Characteristics: Rise/Fall times 20ns/24ns
• Package: TO-220-5 through-hole mounting

The MIC4451ZT meets all electrical and mechanical requirements for direct substitution. Differences in product status and compliance certifications do not affect functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

The MIC4451ZT is the direct functional equivalent for the obsolete MIC4451CT. All electrical specifications, timing characteristics, and mechanical parameters are identical. Selection between these parts should be based on the following criteria:

For new designs and ongoing production requiring RoHS3 compliance, the MIC4451ZT is the appropriate choice. The active product status ensures long-term availability and supply chain continuity.

For legacy system maintenance where RoHS compliance is not a requirement, the MIC4451CT remains functionally equivalent, though availability may be limited due to obsolete status.

Both parts are manufactured by Microchip Technology and share the same base product number (MIC4451), confirming their electrical and mechanical interchangeability within the specified operating parameters.

Frequently Asked Questions (FAQ)

Q: Can MIC4451ZT directly replace MIC4451CT in existing designs?

A: Yes. The MIC4451ZT is electrically and mechanically identical to the MIC4451CT. All electrical specifications, output current ratings, timing characteristics, and package dimensions are equivalent. Direct substitution requires no circuit modifications.

Q: What is the difference between MIC4451CT and MIC4451ZT?

A: The primary differences are product status and compliance certification. The MIC4451CT is obsolete and RoHS non-compliant. The MIC4451ZT is active and ROHS3 compliant. Functionally, both devices are identical.

Q: Are there any package or pinout differences?

A: No. Both parts use the TO-220-5 through-hole package with identical pinout and mechanical dimensions. PCB layout and mounting procedures are unchanged.

Q: Which part should be selected for new designs?

A: The MIC4451ZT should be selected for new designs. It offers active product status, ensuring availability and supply chain support. Additionally, ROHS3 compliance meets current regulatory requirements for most applications.

Q: Is the MIC4451ZT available in different packaging options?

A: The MIC4451ZT is supplied in Tube packaging. The MIC4451CT packaging specification was not provided. Both maintain the same TO-220-5 case style for through-hole mounting.

Q: What are the key parameters that determine substitution compatibility?

A: Substitution compatibility is determined by: driven configuration (low-side), channel type (single), gate type (IGBT/N-Channel MOSFET), supply voltage range (4.5V ~ 18V), logic voltage levels (0.8V/2.4V), peak output current (12A), input type (inverting), timing characteristics (20ns/24ns), and package type (TO-220-5). All these parameters are identical between the MIC4451CT and MIC4451ZT.