HER155-TP Equivalent & Substitute Parts

Part Overview

The HER155-TP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 400 V DC reverse voltage and 1.5 A average rectified current in a DO-15 through-hole package. This component is classified as obsolete, making identification of equivalent and substitute parts necessary for ongoing design support, maintenance, and production continuity. The fast recovery characteristic (≤500 ns) and compact axial package make this diode suitable for standard rectification applications requiring moderate current handling and voltage blocking capability.

Substiute Parts

HER155-TP

Micro Commercial CoIn Stock: 887HER155-TP Datasheet

Current PartRFQ

HER205G-TP

Micro Commercial CoIn Stock: 1174HER205G-TP Datasheet

DirectRFQ

1N5395G B0G

Taiwan Semiconductor CorporationIn Stock: 8161N5395G B0G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the HER155-TP are identified based on the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

• Voltage - DC Reverse (Vr) rating must equal or exceed 400 V
• Current - Average Rectified (Io) must equal or exceed 1.5 A
• Package / Case must be DO-15 or DO-204AC (axial through-hole)
• Mounting Type must be Through Hole
• Operating Temperature range must support the application environment

Secondary Compatibility Factors:

• Forward voltage (Vf) characteristics
• Reverse recovery time (trr) classification
• Reverse leakage current specifications
• RoHS and regulatory compliance status

Parts are grouped into two categories: Direct Manufacturer Substitutes (same manufacturer, active product status) and Similar Manufacturer Alternatives (different manufacturer, equivalent electrical specifications).

Parameter Comparison

Engineering Selection Recommendations

HER205G-TP (Direct Manufacturer Substitute - Preferred)

The HER205G-TP is the primary substitute for the obsolete HER155-TP. Both components are manufactured by Micro Commercial Co and share identical voltage and package specifications. The HER205G-TP offers a higher current rating (2 A versus 1.5 A), providing design margin in applications where the original 1.5 A specification is adequate. The HER205G-TP maintains the same fast recovery time (50 ns) and reverse leakage characteristics. Product status is Active, ensuring long-term availability and supply chain stability. Operating temperature range extends to 150°C, compared to 125°C for the HER155-TP. RoHS3 compliance is maintained. This part is available in Tape & Reel packaging, suitable for automated assembly processes.

1N5395G B0G (Similar Manufacturer Alternative)

The 1N5395G B0G, manufactured by Taiwan Semiconductor Corporation, provides an alternative substitute with identical voltage (400 V) and current (1.5 A) ratings to the original HER155-TP. This part is classified as Active and offers extended operating temperature range (-55 to 150°C). Key differences include Standard Recovery speed classification (>500 ns) versus the Fast Recovery characteristic of the HER155-TP, lower forward voltage (1 V @ 1.5 A versus 1.3 V), and reduced capacitance (15 pF versus 50 pF). These differences may affect switching performance in high-frequency applications. RoHS3 compliance and REACH Unaffected status are confirmed. This part is suitable for applications where recovery speed is not a critical design parameter.

Selection Basis:

• For direct replacement with enhanced margin: HER205G-TP
• For exact current rating match with alternative manufacturer: 1N5395G B0G
• For high-frequency switching applications: HER205G-TP (fast recovery maintained)
• For cost optimization in non-critical applications: 1N5395G B0G

All substitute parts meet RoHS3 compliance requirements and are available in active production status, ensuring supply continuity.

Frequently Asked Questions (FAQ)

Q: Can the HER205G-TP directly replace the HER155-TP in all applications?

A: Yes, within the electrical operating parameters. The HER205G-TP has a higher current rating (2 A versus 1.5 A), which provides design margin. Both parts share identical voltage ratings (400 V), package type (DO-15), mounting method (through-hole), and recovery characteristics (50 ns fast recovery). The extended operating temperature range of the HER205G-TP (-55 to 150°C versus -55 to 125°C) is an additional benefit.

Q: What is the key difference between the HER205G-TP and the 1N5395G B0G?

A: The primary difference is recovery speed classification. The HER205G-TP is classified as Fast Recovery (≤500 ns, 50 ns typical), while the 1N5395G B0G is Standard Recovery (>500 ns). Additionally, the 1N5395G B0G has lower forward voltage (1 V @ 1.5 A) and lower capacitance (15 pF). These differences are significant in high-frequency rectification circuits but negligible in low-frequency power supply applications.

Q: Are all substitute parts available in the same package?

A: Yes. All three parts (HER155-TP, HER205G-TP, and 1N5395G B0G) use the DO-15 axial through-hole package (DO-204AC designation). Physical dimensions and lead spacing are compatible, allowing direct board-level substitution without layout modifications.

Q: What is the significance of the current rating difference between HER155-TP (1.5 A) and HER205G-TP (2 A)?

A: The HER205G-TP's higher current rating (2 A) means it can safely handle greater average rectified current without exceeding thermal limits. In applications where the circuit draws 1.5 A or less, the HER205G-TP operates with additional thermal margin, potentially extending component life and improving reliability. The higher rating does not negatively affect performance in lower-current applications.

Q: Why is the HER155-TP classified as obsolete?

A: Obsolete status indicates the part is no longer in active production by the manufacturer. The HER205G-TP serves as the active replacement in the Micro Commercial Co product line, offering improved specifications and continued availability.

Q: Are there compliance or regulatory differences between the substitute parts?

A: All three parts are ROHS3 compliant. The HER205G-TP and 1N5395G B0G both carry REACH Unaffected status, confirming compliance with European chemical regulations. All parts are classified under ECCN EAR99 and HTSUS 8541.10.0080 for export control and tariff purposes.

Q: Which substitute should be selected for a new design?

A: The HER205G-TP is recommended for new designs. It is manufactured by the same company as the original part, maintains active product status, and offers superior specifications (higher current rating, extended temperature range, confirmed fast recovery performance). This selection ensures long-term supply availability and design consistency.

Q: Can the 1N5395G B0G be used in switching power supply applications?

A: The 1N5395G B0G can be used in switching power supplies where recovery speed is not a critical parameter. However, applications requiring fast switching transitions (such as high-frequency buck or boost converters) should use the HER205G-TP to maintain the 50 ns recovery time characteristic. Verify circuit performance through simulation or testing when switching frequency exceeds 100 kHz.