BTS3408G Equivalent & Substitute Parts

Part Overview

The BTS3408G is a Power Management Integrated Circuit (PMIC) manufactured by Infineon Technologies, classified as a Power Switch/Driver with 1:1 N-Channel configuration rated at 550mA output current. This component operates in the HITFET® series and is designed for low-side switching applications with general-purpose functionality. The BTS3408G is currently listed as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity. The part features auto restart capability, status flag output, and comprehensive fault protection including current limiting, open load detection, over-temperature, and over-voltage protection.

Substiute Parts

BTS3408G

Infineon TechnologiesIn Stock: 103798BTS3408G Datasheet

Current PartRFQ

BTT3050EJXUMA1

Infineon TechnologiesIn Stock: 2285BTT3050EJXUMA1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BTS3408G is determined by strict alignment of the following critical parameters:

Core Substitution Criteria:

• Output Configuration: Low Side switching only
• Output Type: N-Channel
• Interface: On/Off control
• Input Type: Non-Inverting
• Mounting Type: Surface Mount
• Package Compatibility: 8-SOIC form factor
• Operating Temperature Range: Minimum -40°C ~ 150°C (TJ)
• Manufacturer: Infineon Technologies HITFET® series preferred for design continuity

Electrical Performance Boundaries:

• Load Voltage Range: Must support minimum 4.5V operation
• Output Current: Substitute must meet or exceed 550mA requirement
• On-Resistance (Rds On): Lower values acceptable; higher values require thermal analysis
• Fault Protection: Must include current limiting and over-temperature protection as minimum

The BTT3050EJXUMA1 qualifies as a manufacturer-recommended substitute based on these criteria, despite differences in specific electrical ratings and feature sets.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: BTT3050EJXUMA1

The BTT3050EJXUMA1 is the manufacturer-recommended substitute for the obsolete BTS3408G. Selection is based on the following engineering factors:

Product Status & Availability: The BTS3408G is obsolete with no ongoing manufacturing. The BTT3050EJXUMA1 is actively produced by Infineon Technologies, ensuring long-term supply chain continuity and design support.

Regulatory Compliance: The BTT3050EJXUMA1 meets ROHS3 compliance requirements, whereas the BTS3408G compliance status is not specified. Both parts maintain REACH Unaffected status and identical MSL ratings, ensuring equivalent handling and storage requirements.

Functional Compatibility: Both components share identical core switching characteristics: low-side N-channel configuration, on/off interface, non-inverting input, and -40°C to 150°C operating temperature range. The 8-SOIC package footprint is compatible, with the substitute featuring an exposed pad for improved thermal management.

Electrical Performance: The BTT3050EJXUMA1 provides superior electrical performance with 4A maximum output current (versus 550mA) and significantly lower on-resistance (50mOhm versus 480mOhm). These improvements reduce thermal dissipation and provide design margin for current-limited applications.

Load Voltage Consideration: The substitute operates within 6V to 36V load voltage range, compared to the original 4.5V to 60V range. Applications requiring sub-6V operation require alternative component evaluation.

Frequently Asked Questions (FAQ)

Q: Can the BTT3050EJXUMA1 directly replace the BTS3408G in existing designs?

A: Direct replacement is possible for applications where load voltage remains above 6V. The substitute maintains identical package footprint, control interface, and operating temperature range. PCB layout modifications are not required. However, designs operating below 6V load voltage require alternative component selection.

Q: What are the key differences between these parts?

A: The primary differences are product status (obsolete versus active), output current rating (550mA versus 4A), on-resistance (480mOhm versus 50mOhm), and load voltage range (4.5V-60V versus 6V-36V). The substitute provides higher current capacity and lower resistance, resulting in improved thermal performance and reduced power dissipation.

Q: Are the package dimensions identical?

A: Both parts use 8-SOIC (0.154", 3.90mm Width) surface-mount packages. The BTT3050EJXUMA1 includes an exposed pad for enhanced thermal dissipation. Existing PCB layouts designed for the BTS3408G are compatible with the substitute without modification.

Q: What compliance certifications apply to the substitute?

A: The BTT3050EJXUMA1 is ROHS3 compliant and maintains REACH Unaffected status. Moisture sensitivity level is identical (MSL 3, 168 hours) for both parts, requiring equivalent handling and storage protocols.

Q: Does the lower on-resistance of the substitute affect circuit operation?

A: Lower on-resistance (50mOhm versus 480mOhm) reduces power dissipation and heat generation, providing design margin. This improvement is beneficial for thermal management and does not negatively impact circuit functionality. Applications sensitive to switching characteristics should verify gate drive requirements remain compatible.

Q: What applications require load voltage above 6V for the substitute?

A: The BTT3050EJXUMA1 load voltage minimum is 6V. Applications operating at 4.5V to 5.5V require alternative component evaluation, as the substitute does not support this voltage range.