US5A-TP Equivalent & Substitute Parts

Part Overview

The US5A-TP is a 50 V, 5A surface mount rectifier diode manufactured by Micro Commercial Co in DO-214AB (SMC) package. This component is classified as not for new designs, indicating it has been superseded in the manufacturer's product line. Finding equivalent and substitute parts is necessary for ongoing maintenance, repair, and legacy system support where the original part is unavailable or inventory is depleted.

Substiute Parts

US5A-TP

Micro Commercial CoIn Stock: 780US5A-TP Datasheet

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RS3AHE3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1001RS3AHE3_A/I Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the US5A-TP rectifier diode is determined by the following critical parameters:

Voltage Rating Compatibility: The substitute part must maintain a DC reverse voltage rating (Vr) of 50 V or higher to ensure safe operation in the original circuit.

Current Rating Compatibility: The substitute part must support the average rectified current (Io) requirement. The US5A-TP is rated for 5A. Substitute parts with lower current ratings (such as 3A) operate within reduced current capacity and may not be suitable for applications requiring the full 5A specification.

Package and Mounting Compatibility: Both the main part and substitute must use the DO-214AB (SMC) surface mount package to ensure mechanical and electrical compatibility with existing PCB layouts and assembly processes.

Speed Classification: The substitute must maintain fast recovery characteristics (≤ 500ns, > 200mA) to preserve switching performance in the original application.

Operating Temperature Range: The substitute must support the junction temperature range of -55°C to 150°C to function across the intended environmental conditions.

The RS3AHE3_A/I from Vishay General Semiconductor - Diodes Division shares the same voltage rating (50 V), package type (DO-214AB, SMC), speed classification (fast recovery), and operating temperature range. However, the RS3AHE3_A/I is rated for 3A average rectified current, which is lower than the US5A-TP specification of 5A.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement in Existing Designs:

The RS3AHE3_A/I from Vishay can serve as a substitute in applications where the circuit operates at or below 3A average rectified current. The matching voltage rating (50 V), package type (DO-214AB, SMC), and operating temperature range (-55°C to 150°C) ensure mechanical and thermal compatibility. The RS3AHE3_A/I carries active product status and AEC-Q101 automotive qualification, providing long-term availability and quality assurance.

Current Rating Consideration:

Applications requiring the full 5A specification of the US5A-TP cannot use the RS3AHE3_A/I without circuit redesign or parallel configuration. The 3A rating of the substitute represents a 40% reduction in current capacity.

Recovery Time Consideration:

The RS3AHE3_A/I exhibits a reverse recovery time (trr) of 150 ns compared to the US5A-TP specification of 50 ns. This difference may affect switching performance in high-frequency applications or circuits with tight timing requirements.

Compliance and Availability:

The RS3AHE3_A/I is ROHS3 compliant and carries REACH unaffected status, matching the regulatory profile of the original part. The substitute is currently in active production with documented inventory availability.

Frequently Asked Questions (FAQ)

Q: Can the RS3AHE3_A/I replace the US5A-TP in all applications?

A: The RS3AHE3_A/I is compatible with applications operating at 3A or below. Applications requiring the full 5A specification of the US5A-TP require alternative solutions or circuit modification.

Q: Are the packages physically identical?

A: Yes. Both the US5A-TP and RS3AHE3_A/I use the DO-214AB (SMC) surface mount package. PCB footprints and assembly processes are compatible.

Q: What is the impact of the different reverse recovery times?

A: The US5A-TP specifies 50 ns reverse recovery time, while the RS3AHE3_A/I specifies 150 ns. In applications with switching frequencies above 1 MHz or circuits sensitive to reverse recovery characteristics, this difference may affect performance. Low-frequency rectification applications are typically unaffected.

Q: Is the RS3AHE3_A/I suitable for automotive applications?

A: Yes. The RS3AHE3_A/I carries AEC-Q101 automotive qualification, making it suitable for automotive-grade applications. The US5A-TP does not specify automotive qualification.

Q: What is the difference in forward voltage drop?

A: The US5A-TP specifies 1 V maximum forward voltage at 5A, while the RS3AHE3_A/I specifies 1.3 V maximum at 2.5A. Direct comparison is not possible due to different test conditions. At equivalent current levels, forward voltage characteristics may differ.

Q: Can multiple RS3AHE3_A/I diodes be paralleled to achieve 5A capacity?

A: Parallel configuration of diodes requires careful thermal and current-sharing design. This approach is outside the scope of direct substitution and requires circuit redesign and thermal analysis.

Q: What packaging format is available for the RS3AHE3_A/I?

A: The RS3AHE3_A/I is supplied in Tape & Reel (TR) format, whereas the US5A-TP is supplied in Bulk packaging. Assembly and procurement processes may require adjustment.