HER154-TP Equivalent & Substitute Parts

Part Overview

The HER154-TP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 300 V DC reverse voltage and 1.5 A average rectified current in a DO-15 through-hole package. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing design requirements and procurement needs. The HER154-TP features fast recovery characteristics with a reverse recovery time of 50 ns, making it suitable for standard rectification applications requiring moderate current handling.

Substiute Parts

HER154-TP

Micro Commercial CoIn Stock: 1128HER154-TP Datasheet

Current PartRFQ

HER204G-TP

Micro Commercial CoIn Stock: 785HER204G-TP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the HER154-TP is determined by equivalence across the following critical electrical and mechanical parameters:

Voltage Rating: The substitute part must maintain the same maximum DC reverse voltage of 300 V to ensure circuit protection and reliability.

Package and Mounting: The substitute must use the identical DO-15 through-hole axial package to ensure mechanical compatibility with existing PCB layouts and assembly processes.

Reverse Recovery Time: The substitute must maintain the fast recovery characteristic (50 ns) to preserve switching performance in rectification circuits.

Reverse Leakage Current: The substitute must not exceed the specified reverse leakage of 5 µA at 300 V to maintain circuit performance.

RoHS Compliance: The substitute must maintain ROHS3 compliance status for regulatory alignment.

The HER204G-TP qualifies as a direct substitute based on these parameters. While the HER204G-TP features a higher average rectified current rating (2 A versus 1.5 A), this represents an uprated capability that does not compromise compatibility. The identical voltage rating, package type, recovery time, leakage current, and compliance status establish functional equivalence for applications designed around the HER154-TP specification.

Parameter Comparison

Engineering Selection Recommendations

The HER204G-TP is the direct substitute for the obsolete HER154-TP. Selection of the HER204G-TP is based on the following engineering criteria:

Product Status: The HER154-TP is classified as obsolete, while the HER204G-TP maintains active product status, ensuring long-term availability and supply chain continuity.

Regulatory Compliance: Both parts maintain ROHS3 compliance, satisfying environmental and regulatory requirements without modification to design or procurement processes.

Electrical Equivalence: The HER204G-TP maintains identical voltage rating, reverse recovery time, reverse leakage current, and capacitance characteristics. The increased current rating (2 A versus 1.5 A) provides design margin without introducing incompatibility.

Thermal Performance: The HER204G-TP extends the maximum operating junction temperature to 150°C compared to 125°C for the HER154-TP, providing enhanced thermal headroom in applications subject to elevated ambient conditions.

Package Compatibility: Both parts use the DO-15 through-hole axial package, ensuring direct mechanical and electrical compatibility with existing PCB layouts and assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the HER204G-TP directly replace the HER154-TP in existing designs?

A: Yes. The HER204G-TP is electrically and mechanically compatible with the HER154-TP. Both parts share identical voltage ratings, package types, reverse recovery times, and leakage current specifications. The higher current rating of the HER204G-TP (2 A versus 1.5 A) does not introduce incompatibility.

Q: What is the significance of the higher current rating in the HER204G-TP?

A: The HER204G-TP is rated for 2 A average rectified current compared to 1.5 A for the HER154-TP. This represents an uprated capability that provides design margin. Applications designed for 1.5 A operation operate within the HER204G-TP specification without stress or performance degradation.

Q: Are there packaging differences between these parts?

A: No. Both the HER154-TP and HER204G-TP use the DO-15 through-hole axial package. Mechanical compatibility is maintained for PCB assembly and layout purposes.

Q: Does the extended temperature range of the HER204G-TP affect compatibility?

A: No. The HER204G-TP extends the maximum operating junction temperature to 150°C compared to 125°C for the HER154-TP. This represents an enhancement that does not compromise compatibility with designs specified for the lower temperature range.

Q: Are both parts RoHS compliant?

A: Yes. Both the HER154-TP and HER204G-TP maintain ROHS3 compliance status, satisfying environmental and regulatory requirements without modification to procurement or design processes.

Q: What is the reverse recovery time specification, and why is it important?

A: Both parts specify a reverse recovery time of 50 ns, classifying them as fast recovery diodes. This parameter determines switching speed in rectification circuits and is maintained across both parts, ensuring equivalent performance characteristics.

Q: How do the reverse leakage current specifications compare?

A: Both parts specify a maximum reverse leakage current of 5 µA at 300 V. This parameter is critical for circuit performance in high-impedance applications and is identical across both parts.