BTS426L1 Equivalent & Substitute Parts

Part Overview

The BTS426L1 is a Power Switch/Driver IC from Infineon Technologies' PROFET® series, designed for high-side N-channel switching applications. This component operates as a 1:1 power switch with a maximum output current of 5.8A and an on-resistance of 50mOhm typical. The device is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

BTS426L1

Infineon TechnologiesIn Stock: 17656BTS426L1 Datasheet

Current PartRFQ

BTS428L2ATMA1

Infineon TechnologiesIn Stock: 2912BTS428L2ATMA1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BTS426L1 is determined by strict equivalence across the following critical parameters:

• Functional Architecture: 1:1 ratio, high-side N-channel output configuration
• Electrical Performance: Maximum output current of 5.8A, on-resistance of 50mOhm typical
• Load Voltage Range: Minimum 5V operation capability
• Protection Features: Current limiting and over-temperature protection
• Interface Type: Non-inverting on/off control
• Operating Temperature Range: -40°C to 150°C junction temperature

The BTS428L2ATMA1 meets these substitution criteria while offering enhanced specifications and active product status. The primary distinction is the package format transition from through-hole TO-220-5 to surface-mount TO-252-5 (DPAK), which requires PCB layout modification but maintains electrical equivalence.

Parameter Comparison

Engineering Selection Recommendations

The BTS428L2ATMA1 serves as the primary substitute for the obsolete BTS426L1. Selection of this substitute is supported by the following engineering factors:

Product Status: The BTS426L1 is classified as obsolete, while the BTS428L2ATMA1 maintains active product status with current manufacturing support and availability.

Regulatory Compliance: The BTS428L2ATMA1 is ROHS3 compliant, whereas the BTS426L1 is RoHS non-compliant. This compliance status is relevant for applications subject to environmental regulations.

Electrical Equivalence: Both devices maintain identical core electrical specifications: 5.8A maximum output current, 50mOhm typical on-resistance, 1:1 switching ratio, and -40°C to 150°C operating temperature range.

Load Voltage Range: The BTS428L2ATMA1 extends the load voltage operating range to 4.75V ~ 41V, compared to the BTS426L1's 5V ~ 34V range. This represents an enhancement in operational flexibility.

Feature Differences: The BTS426L1 includes auto-restart and open-load detection features not present in the BTS428L2ATMA1. Applications dependent on these specific features require functional verification during substitution.

Package Transition: Migration from through-hole TO-220-5 to surface-mount TO-252-5 (DPAK) requires PCB redesign. Both packages maintain identical pin functionality and electrical performance.

Frequently Asked Questions (FAQ)

Q: Can the BTS428L2ATMA1 directly replace the BTS426L1 in existing designs?

A: Electrical substitution is valid based on identical output current, on-resistance, switching ratio, and operating temperature specifications. However, package format differs (through-hole versus surface-mount), requiring PCB layout modification. Applications utilizing auto-restart or open-load detection features must evaluate functional impact.

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

A: Primary differences include product status (obsolete versus active), package format (TO-220-5 through-hole versus TO-252-5 surface-mount), RoHS compliance status, load voltage range (5V~34V versus 4.75V~41V), and feature set (BTS426L1 includes auto-restart and open-load detect; BTS428L2ATMA1 includes status flag only).

Q: Is the BTS428L2ATMA1 suitable for applications requiring open-load detection?

A: The BTS428L2ATMA1 does not include open-load detection capability. Applications dependent on this protection feature must implement alternative detection methods or identify alternative substitute components with this functionality.

Q: What PCB considerations apply when transitioning from TO-220-5 to TO-252-5 packaging?

A: TO-220-5 is a through-hole package with formed leads for insertion into PCB holes. TO-252-5 (DPAK) is a surface-mount package requiring solder pads on the PCB surface. Thermal management differs; TO-252-5 includes a tab for enhanced heat dissipation. PCB layout, trace routing, and thermal design must be re-evaluated for the surface-mount format.

Q: Are there inventory considerations for this substitution?

A: The BTS426L1 is obsolete with limited remaining inventory. The BTS428L2ATMA1 is active with current manufacturing support and established supply channels, ensuring long-term availability for production and design continuity.