AOTF404 N-Channel MOSFET Equivalent & Substitute Parts

Part Overview

The AOTF404 is an N-Channel MOSFET rated for 105V drain-to-source voltage with continuous drain current ratings of 5.8A (Ta) and 26A (Tc) in a Through Hole TO-220FL package. This device is classified as obsolete product status. Identification of equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for new production builds and field replacements where the original part is no longer readily procurable.

Substiute Parts

AOTF404

Alpha & Omega Semiconductor Inc.In Stock: 1626AOTF404 Datasheet

Current PartRFQ

AOTF2910L

Alpha & Omega Semiconductor Inc.In Stock: 1678AOTF2910L Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AOTF404 is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• FET Type: N-Channel topology must be maintained
• Technology: MOSFET (Metal Oxide) construction required
• Drain to Source Voltage (Vdss): Substitute must equal or exceed 105V rating
• Continuous Drain Current (Id): Substitute must support application current requirements
• On-State Resistance (Rds On): Lower or equivalent values ensure thermal performance
• Gate Threshold Voltage (Vgs(th)): Must be compatible with gate drive circuitry
• Operating Temperature Range: Must span -55°C to 175°C (TJ)

Mechanical Compatibility Criteria:

• Mounting Type: Through Hole configuration required
• Package / Case: TO-220-3 Full Pack footprint compatibility

Regulatory & Compliance Criteria:

• RoHS3 Compliance: Required for environmental standards
• Moisture Sensitivity Level (MSL): Level 1 (Unlimited) preferred for handling flexibility

The AOTF2910L qualifies as a substitute based on matching N-Channel MOSFET topology, Through Hole mounting, TO-220-3 package compatibility, and regulatory compliance. Although the AOTF2910L has a lower Vdss rating (100V versus 105V), it remains suitable for applications where the actual operating voltage does not exceed 100V.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The AOTF404 carries obsolete product status, indicating discontinued manufacturing and limited availability. The AOTF2910L is classified as active product status, ensuring ongoing availability and supply chain continuity.

Compliance & Certification: Both the AOTF404 and AOTF2910L are ROHS3 compliant and carry MSL Level 1 (Unlimited) moisture sensitivity ratings. Both devices are REACH unaffected and classified under ECCN EAR99. Regulatory requirements are satisfied by either part selection.

Electrical Performance: The AOTF2910L demonstrates improved electrical characteristics in several parameters: lower on-state resistance (24 mOhm versus 28 mOhm), reduced gate charge (15 nC versus 46 nC), and lower input capacitance (1190 pF versus 2445 pF). These improvements result in reduced switching losses and improved gate drive efficiency.

Voltage Rating Consideration: The AOTF2910L operates at 100V Vdss compared to the AOTF404 at 105V. Selection of the AOTF2910L is appropriate for applications where the maximum operating voltage does not exceed 100V. Applications requiring operation above 100V must retain the AOTF404 or identify alternative parts with higher voltage ratings.

Current Handling: The AOTF2910L supports 22A continuous drain current (Tc), which exceeds the AOTF404 rating of 26A (Tc). For applications requiring continuous currents above 22A, the AOTF404 remains the appropriate selection.

Frequently Asked Questions (FAQ)

Q: Can the AOTF2910L directly replace the AOTF404 in all applications?

A: Direct replacement is possible only when the application maximum operating voltage does not exceed 100V and continuous drain current requirements do not exceed 22A (Tc). The AOTF2910L is electrically and mechanically compatible with the AOTF404 in TO-220-3 package footprint. Applications operating above 100V require retention of the AOTF404 or identification of alternative parts with higher voltage ratings.

Q: What are the key differences between these two parts?

A: The primary differences are drain-to-source voltage rating (105V versus 100V), continuous drain current (26A versus 22A at Tc), on-state resistance (28 mOhm versus 24 mOhm), gate charge (46 nC versus 15 nC), and input capacitance (2445 pF versus 1190 pF). The AOTF2910L exhibits superior switching characteristics with lower gate charge and capacitance values.

Q: Are the packages identical between AOTF404 and AOTF2910L?

A: Both devices use TO-220-3 Full Pack configuration with Through Hole mounting. The AOTF404 uses TO-220FL supplier package while the AOTF2910L uses TO-220F supplier package. Both are mechanically compatible with standard TO-220-3 footprints.

Q: What is the product status difference and why does it matter?

A: The AOTF404 is classified as obsolete, indicating discontinued manufacturing. The AOTF2910L is active product status, ensuring ongoing production and supply availability. For new designs and long-term production requirements, the AOTF2910L provides supply chain security.

Q: Are both parts RoHS compliant?

A: Yes, both the AOTF404 and AOTF2910L are ROHS3 compliant. Both carry MSL Level 1 (Unlimited) moisture sensitivity ratings and are REACH unaffected. Regulatory requirements are satisfied by either part.

Q: How do the thermal characteristics compare?

A: The AOTF404 supports 43W power dissipation at Tc, while the AOTF2910L supports 27W at Tc. For applications requiring high power dissipation above 27W, the AOTF404 provides higher thermal capacity. The AOTF2910L's lower on-state resistance (24 mOhm versus 28 mOhm) reduces resistive heating in many applications.

Q: What gate drive voltage is required for each part?

A: The AOTF404 has a gate threshold voltage of 4V at 250µA, while the AOTF2910L has 2.7V at 250µA. The AOTF2910L requires lower gate threshold voltage, potentially simplifying gate drive circuit design. Both parts support maximum gate voltages of ±20V to ±25V respectively.