HER102-AP Equivalent & Substitute Parts

Part Overview

The HER102-AP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 100 V DC reverse voltage and 1 A average rectified current in a through-hole DO-41 package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The diode features fast recovery characteristics with a reverse recovery time of 50 ns and operates across a junction temperature range of -55°C to 125°C. Substitute parts must maintain electrical and mechanical compatibility while meeting current availability and compliance requirements.

Substiute Parts

HER102-AP

Micro Commercial CoIn Stock: 1014HER102-AP Datasheet

Current PartRFQ

UF1B B0G

Taiwan Semiconductor CorporationIn Stock: 1109UF1B B0G Datasheet

UpgradeRFQ

GP10B-4002HE3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 1132GP10B-4002HE3/54 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the HER102-AP are selected based on strict electrical and mechanical parameter matching. The critical parameters that determine substitution eligibility are:

• Voltage Rating: DC reverse voltage must equal or exceed 100 V
• Current Rating: Average rectified current must equal or exceed 1 A
• Package Type: Must be compatible with DO-41 or DO-204AL through-hole axial configuration
• Recovery Characteristics: Fast recovery speed (≤500 ns for currents >200 mA) is required
• Temperature Range: Operating junction temperature must support the application environment
• Compliance: RoHS3 compliance is mandatory

The substitute parts identified below meet all these criteria and are classified as either upgrades (improved specifications with active product status) or similar alternatives (equivalent specifications with active availability).

Parameter Comparison

Engineering Selection Recommendations

UF1B B0G (Upgrade Substitute)

The UF1B B0G from Taiwan Semiconductor Corporation is the primary recommended substitute for the obsolete HER102-AP. This part maintains identical voltage and current ratings while offering improved electrical characteristics. The forward voltage is reduced to 1 V at 1 A (compared to 1.1 V), and reverse leakage current is significantly lower at 5 µA versus 5 mA. The extended operating temperature range (-55°C to 150°C) provides additional thermal margin. Both parts share fast recovery characteristics with 50 ns reverse recovery time. The UF1B B0G carries active product status with ROHS3 compliance and unlimited moisture sensitivity level, ensuring long-term availability and regulatory compliance.

GP10B-4002HE3/54 (Similar Substitute)

The GP10B-4002HE3/54 from Vishay General Semiconductor - Diodes Division is a functionally equivalent alternative with identical voltage and current specifications. This part is part of the SUPERECTIFIER® series and maintains through-hole DO-41 package compatibility. However, this part operates with standard recovery characteristics (>500 ns) rather than fast recovery, which may impact performance in applications requiring rapid switching. The GP10B-4002HE3/54 is suitable for applications where recovery speed is not a critical design parameter. This part also carries active product status and ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can the UF1B B0G directly replace the HER102-AP in existing designs?

A: Yes. The UF1B B0G maintains the same voltage rating (100 V), current rating (1 A), and through-hole DO-41 package configuration. The improved forward voltage and lower reverse leakage current represent performance enhancements rather than incompatibilities. The extended temperature range provides additional operational margin.

Q: What is the key difference between the UF1B B0G and GP10B-4002HE3/54?

A: Both parts meet the voltage and current requirements. The primary difference is recovery speed: the UF1B B0G features fast recovery (50 ns), while the GP10B-4002HE3/54 operates with standard recovery (>500 ns). Applications requiring rapid diode switching should use the UF1B B0G. Applications with less stringent switching requirements can use either part.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. Both the UF1B B0G and GP10B-4002HE3/54 are ROHS3 compliant, matching the compliance status of the original HER102-AP.

Q: What is the package compatibility between these parts?

A: All three parts use the DO-204AL/DO-41 axial through-hole package. They are mechanically and electrically interchangeable in PCB layouts designed for this package type.

Q: Why is the reverse leakage current different between the HER102-AP and UF1B B0G?

A: The HER102-AP specifies 5 mA reverse leakage, while the UF1B B0G specifies 5 µA. This represents a 1000-fold improvement in the substitute part, reflecting advances in semiconductor manufacturing technology. Lower reverse leakage reduces power dissipation and improves circuit efficiency.

Q: Which substitute part should be selected for new designs?

A: The UF1B B0G is recommended for new designs. It offers active product status, improved electrical characteristics, extended temperature range, and fast recovery performance. The GP10B-4002HE3/54 is suitable only if standard recovery speed is acceptable for the application.