SFT1450-TL-H Equivalent & Substitute Parts

Part Overview

The SFT1450-TL-H is an N-Channel MOSFET manufactured by onsemi, rated for 40V drain-to-source voltage with 21A continuous drain current at 25°C. This device is packaged in TO-252-3 (DPAK) surface mount configuration and is designed for general-purpose switching applications requiring moderate to high current handling in compact form factors.

The SFT1450-TL-H carries an Obsolete product status. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications currently utilizing this component.

Substiute Parts

SFT1450-TL-H

onsemiIn Stock: 10150SFT1450-TL-H Datasheet

Current PartRFQ

ZXMN4A06KTC

Diodes IncorporatedIn Stock: 30863ZXMN4A06KTC Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SFT1450-TL-H is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• FET Type: N-Channel MOSFET (Metal Oxide technology)
• Drain to Source Voltage (Vdss): 40V minimum
• Package / Case: TO-252-3 (DPAK) surface mount configuration
• Gate voltage compatibility: Vgs (Max) ±20V

Current Handling Consideration: The SFT1450-TL-H specifies 21A continuous drain current at 25°C. Substitute parts with lower current ratings (such as 7.2A) operate within the same voltage class and package but with reduced current capacity. Such substitutes are applicable only in applications where the actual circuit current demand does not exceed the substitute device's rated continuous drain current.

Compliance and Availability: Substitute parts must maintain REACH compliance status and MSL rating of 1 (Unlimited) to ensure compatibility with standard manufacturing and storage conditions.

Parameter Comparison

Engineering Selection Recommendations

ZXMN4A06KTC (Diodes Incorporated)

The ZXMN4A06KTC is an active product manufactured by Diodes Incorporated and qualifies as a substitute for the obsolete SFT1450-TL-H based on the following factors:

• Voltage Class Match: Both devices are rated for 40V Vdss, ensuring compatibility in voltage-constrained applications.
• Package Compatibility: Both use TO-252-3 (DPAK) surface mount packaging, allowing direct PCB layout compatibility without redesign.
• Compliance Alignment: The ZXMN4A06KTC maintains REACH Unaffected status and MSL 1 (Unlimited) rating, matching the original part's compliance profile.
• Active Product Status: The substitute carries Active product status, ensuring ongoing availability and manufacturing support.
• RoHS3 Compliance: The ZXMN4A06KTC is RoHS3 compliant, providing additional environmental compliance assurance.

Current Rating Limitation:

The ZXMN4A06KTC is rated for 7.2A continuous drain current, compared to the SFT1450-TL-H's 21A rating. This substitute is suitable only for applications where the actual circuit current demand does not exceed 7.2A at 25°C ambient temperature. Applications requiring the full 21A capability of the original part require alternative solutions with higher current ratings.

Frequently Asked Questions (FAQ)

Q: Can the ZXMN4A06KTC directly replace the SFT1450-TL-H in all applications?

A: Direct replacement is limited by current rating. The ZXMN4A06KTC is suitable only for applications where continuous drain current does not exceed 7.2A at 25°C. Applications requiring 21A operation require alternative parts with higher current specifications.

Q: Are the gate drive characteristics compatible between these devices?

A: Both devices accept gate voltages up to ±20V maximum. The threshold voltage specifications differ (2.6V for SFT1450-TL-H versus 1V for ZXMN4A06KTC), which may affect gate drive circuit timing. Gate charge values are similar (14.4 nC versus 17.1 nC), indicating comparable switching speed characteristics.

Q: Do these devices use the same PCB footprint?

A: Yes. Both devices use TO-252-3 (DPAK) packaging with identical pin configuration and land pattern. No PCB layout modifications are required for physical substitution.

Q: What is the compliance status difference between these parts?

A: The SFT1450-TL-H carries Obsolete status with REACH Unaffected designation. The ZXMN4A06KTC is an Active product with REACH Unaffected status and additional RoHS3 compliance certification. Both maintain MSL 1 (Unlimited) rating.

Q: How do the on-resistance characteristics compare?

A: The SFT1450-TL-H specifies 28 mOhm at 10.5A and 10V gate voltage. The ZXMN4A06KTC specifies 50 mOhm at 4.5A and 10V gate voltage. The higher on-resistance of the substitute reflects its lower current rating and different die design.

Q: Are there thermal management differences?

A: The SFT1450-TL-H is rated for 23W at Tc (case temperature), while the ZXMN4A06KTC is rated for 2.15W at Ta (ambient temperature). Thermal performance depends on application current levels and PCB thermal design. Applications operating near maximum current ratings require thermal analysis specific to each device.