HER101-AP Equivalent & Substitute Parts

Part Overview

The HER101-AP is a general-purpose rectifier diode rated for 50 V DC reverse voltage and 1 A average rectified current, housed in a DO-41 axial through-hole package. Manufactured by Micro Commercial Co, this component is classified as obsolete, indicating discontinuation from the original manufacturer. Locating equivalent substitute parts is necessary to maintain design continuity and ensure component availability for production, repair, and maintenance applications.

Substiute Parts

HER101-AP

Micro Commercial CoIn Stock: 778HER101-AP Datasheet

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1N4001G

Taiwan Semiconductor CorporationIn Stock: 16011N4001G Datasheet

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1N4001GHR1G

Taiwan Semiconductor CorporationIn Stock: 8881N4001GHR1G Datasheet

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UF1A A0G

Taiwan Semiconductor CorporationIn Stock: 1068UF1A A0G Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the HER101-AP are qualified based on the following electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Voltage - DC Reverse (Vr) (Max): 50 V minimum
• Current - Average Rectified (Io): 1 A minimum
• Voltage - Forward (Vf) (Max) @ If: 1 V @ 1 A maximum
• Operating Temperature - Junction: Must encompass or exceed -55°C ~ 125°C range

Mechanical Compatibility Criteria:

• Mounting Type: Through Hole
• Package / Case: DO-204AL, DO-41, or Axial equivalent
• RoHS Status: ROHS3 Compliant

Compliance Requirements:

• Moisture Sensitivity Level (MSL): 1 (Unlimited)
• ECCN: EAR99
• HTSUS: 8541.10.0080

All substitute parts listed meet these criteria and are available from active product lines, ensuring long-term supply continuity.

Parameter Comparison

Engineering Selection Recommendations

1N4001G (Taiwan Semiconductor Corporation)

The 1N4001G is an active-status substitute offering identical electrical ratings to the HER101-AP. This part features standard recovery characteristics with extended operating temperature range (-55°C ~ 150°C). The 1N4001G is suitable for general-purpose rectification applications where fast recovery is not a design requirement. ROHS3 compliance and MSL 1 rating ensure environmental and moisture compatibility.

1N4001GHR1G (Taiwan Semiconductor Corporation)

The 1N4001GHR1G is an automotive-grade variant qualified to AEC-Q101 standard. This part maintains identical electrical specifications to the 1N4001G while providing enhanced reliability assurance for automotive and mission-critical applications. The extended operating temperature range (-55°C ~ 150°C) and automotive qualification make this part suitable for designs requiring higher reliability standards.

UF1A A0G (Taiwan Semiconductor Corporation)

The UF1A A0G is an active-status substitute featuring fast recovery characteristics matching the HER101-AP (reverse recovery time 50 ns). This part is appropriate for applications requiring fast switching performance. The extended operating temperature range (-55°C ~ 150°C) and ROHS3 compliance provide design flexibility and environmental compliance.

All three substitute parts are manufactured by Taiwan Semiconductor Corporation, an established supplier with active product lines, ensuring long-term availability and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the 1N4001G directly replace the HER101-AP in all applications?

A: The 1N4001G meets all core electrical and mechanical requirements for substitution. However, the 1N4001G features standard recovery characteristics (>500ns) compared to the HER101-AP's fast recovery (≤500ns). Applications sensitive to switching speed or reverse recovery time should evaluate circuit performance with the standard recovery characteristic.

Q: What is the difference between 1N4001G and 1N4001GHR1G?

A: Both parts share identical electrical specifications and package compatibility. The 1N4001GHR1G carries automotive-grade qualification (AEC-Q101), making it suitable for automotive and high-reliability applications. Standard applications may use the 1N4001G.

Q: Why does the UF1A A0G have different capacitance than the other substitutes?

A: The UF1A A0G exhibits 17pF capacitance at 4V, 1MHz, compared to 10pF for the 1N4001G variants. This difference reflects different semiconductor construction and does not affect substitution eligibility for general-purpose rectification. Applications with specific capacitance requirements should evaluate circuit impact.

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

A: All substitute parts are housed in DO-204AL, DO-41, or axial equivalent packages, ensuring mechanical compatibility with the HER101-AP. Supplier device packages are standardized across all substitutes.

Q: What is the significance of the extended operating temperature range in substitute parts?

A: The substitute parts operate across -55°C ~ 150°C, compared to the HER101-AP's -55°C ~ 125°C range. This extended range provides additional design margin for high-temperature applications and does not restrict substitution in designs operating within the original temperature specification.

Q: Are all substitute parts RoHS3 compliant?

A: All substitute parts listed are ROHS3 compliant with MSL 1 (Unlimited) rating, matching the environmental and moisture specifications of the HER101-AP.

Q: Which substitute part should be selected for automotive applications?

A: The 1N4001GHR1G is qualified to AEC-Q101 automotive standard and is the appropriate selection for automotive and mission-critical applications requiring enhanced reliability assurance.