TPAR3J Equivalent & Substitute Parts

Part Overview

The TPAR3J is a fast recovery rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 600V DC reverse voltage and 3A average rectified current. This surface mount component features a 120ns reverse recovery time and is housed in a TO-277 (3-PowerDFN) package. The TPAR3J is designated as Last Time Buy, indicating that this part number is no longer in active production. Identification of equivalent substitute parts is necessary to ensure continued design support and procurement availability for applications currently utilizing this component.

Substiute Parts

TPAR3J

Taiwan Semiconductor CorporationIn Stock: 1101TPAR3J Datasheet

Current PartRFQ

TUAR4JH

Taiwan Semiconductor CorporationIn Stock: 6865TUAR4JH Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TPAR3J with the TUAR4JH is permissible based on the following electrical and mechanical compatibility criteria:

Matching Parameters:

• Voltage - DC Reverse (Vr) (Max): Both rated at 600V
• Package / Case: Both use TO-277, 3-PowerDFN
• Mounting Type: Both are surface mount
• RoHS Status: Both ROHS3 Compliant
• Moisture Sensitivity Level (MSL): Both rated at 1 (Unlimited)
• Speed Classification: Both classified as Fast Recovery (≤500ns, >200mA)

Substitution Logic: The TUAR4JH provides equivalent or superior electrical performance within the same voltage class and package footprint. The substitute part maintains the same 600V reverse voltage rating and physical form factor, ensuring mechanical and electrical compatibility in existing circuit designs. The higher current rating (4A versus 3A) of the substitute part does not preclude its use in applications designed for the 3A TPAR3J, as the substitute operates within the same voltage and thermal envelope.

Parameter Comparison

Engineering Selection Recommendations

The TUAR4JH is the designated manufacturer substitute for the TPAR3J. Selection of the TUAR4JH is supported by the following factors:

Compliance and Certification: Both parts maintain ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1), ensuring compatibility with current manufacturing and environmental standards. The TUAR4JH carries AEC-Q101 automotive qualification, providing additional quality assurance for applications requiring automotive-grade components.

Product Status: The TPAR3J is designated Last Time Buy, indicating production discontinuation. The TUAR4JH maintains Active product status, ensuring long-term availability and supply chain continuity.

Electrical Compatibility: The TUAR4JH operates within the same 600V voltage class and maintains the same package footprint (TO-277, 3-PowerDFN), ensuring direct mechanical compatibility. The higher current rating of the substitute part (4A versus 3A) provides design margin without introducing incompatibility.

Thermal Considerations: The TUAR4JH operates over a junction temperature range of -55°C to 150°C, compared to the TPAR3J range of -55°C to 175°C. Applications operating above 150°C junction temperature require design review.

Frequently Asked Questions (FAQ)

Q: Can the TUAR4JH directly replace the TPAR3J in existing designs?

A: The TUAR4JH is mechanically and electrically compatible with the TPAR3J. Both components use the TO-277, 3-PowerDFN package and are rated for 600V operation. The substitute part accommodates the same circuit topology and PCB footprint. Applications operating above 150°C junction temperature require thermal analysis.

Q: What are the key differences between the TPAR3J and TUAR4JH?

A: The primary differences are current rating (3A versus 4A), reverse recovery time (120ns versus 250ns), and maximum junction temperature (175°C versus 150°C). The TUAR4JH exhibits lower reverse leakage current (5µA versus 10µA) and lower junction capacitance (31pF versus 58pF).

Q: Are both parts RoHS compliant?

A: Yes, both the TPAR3J and TUAR4JH are ROHS3 compliant and carry unlimited moisture sensitivity rating (MSL 1).

Q: Why is the TPAR3J designated Last Time Buy?

A: Last Time Buy designation indicates that the manufacturer has discontinued production of this part number. The TUAR4JH is the active substitute offering equivalent functionality with continued manufacturing support.

Q: Does the higher current rating of the TUAR4JH affect circuit operation?

A: The higher current rating (4A versus 3A) does not negatively affect circuit operation in applications designed for the 3A TPAR3J. The substitute part operates within the same voltage class and thermal envelope, providing design margin without introducing incompatibility.

Q: What is the impact of the longer reverse recovery time in the TUAR4JH?

A: The TUAR4JH exhibits a reverse recovery time of 250ns compared to 120ns for the TPAR3J. This difference may affect switching performance in high-frequency applications. Circuit performance should be evaluated for applications sensitive to reverse recovery characteristics.

Q: Are both parts suitable for automotive applications?

A: The TUAR4JH carries AEC-Q101 automotive qualification. The TPAR3J does not list automotive qualification in the provided specifications. Applications requiring automotive-grade components should specify the TUAR4JH.