HER104-AP Equivalent & Substitute Parts

Part Overview

The HER104-AP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 300 V DC reverse voltage and 1 A average rectified current in a DO-41 through-hole package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The HER104-AP features fast recovery characteristics with a 50 ns reverse recovery time, suitable for standard rectification applications requiring moderate voltage and current ratings.

Substiute Parts

HER104-AP

Micro Commercial CoIn Stock: 713HER104-AP Datasheet

Current PartRFQ

HER104G-AP

Micro Commercial CoIn Stock: 1231HER104G-AP Datasheet

DirectRFQ

SF15GHB0G

Taiwan Semiconductor CorporationIn Stock: 754SF15GHB0G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the HER104-AP is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

• Voltage - DC Reverse (Vr) (Max): Must equal or exceed 300 V
• Current - Average Rectified (Io): Must equal or exceed 1 A
• Speed Classification: Must maintain Fast Recovery characteristics (≤ 500ns, > 200mA)
• Reverse Recovery Time (trr): Must be ≤ 50 ns or lower
• Operating Temperature Range: Must support -55°C ~ 125°C minimum

Mechanical Compatibility Criteria:

• Package / Case: Must be DO-204AL, DO-41, or Axial configuration
• Mounting Type: Must be Through Hole
• Supplier Device Package: Must be DO-41 or equivalent

Compliance Criteria:

• RoHS Status: Must be ROHS3 Compliant

Substitute parts are classified as Direct Manufacturer (same manufacturer, active product status) or Similar Manufacturer (alternative manufacturer, active product status with enhanced specifications).

Parameter Comparison

Engineering Selection Recommendations

HER104G-AP (Direct Manufacturer Substitute)

The HER104G-AP is the primary substitute for the obsolete HER104-AP. Both parts are manufactured by Micro Commercial Co and share identical electrical and mechanical specifications. The HER104G-AP is classified as Active product status, ensuring ongoing availability and supply chain continuity. This part features improved reverse leakage current (5 µA versus 5 mA) and lower forward voltage drop (1 V versus 1.1 V at 1 A), providing enhanced performance characteristics while maintaining full compatibility. The HER104G-AP is supplied in Tape & Box packaging and is ROHS3 Compliant.

SF15GHB0G (Similar Manufacturer Substitute)

The SF15GHB0G, manufactured by Taiwan Semiconductor Corporation, is an alternative substitute meeting all electrical and mechanical compatibility requirements. This part is classified as Active and carries AEC-Q101 automotive qualification, indicating enhanced reliability screening. The SF15GHB0G provides superior reverse recovery time (35 ns versus 50 ns) and extended operating temperature range (-55°C ~ 150°C versus -55°C ~ 125°C). Forward voltage is slightly elevated at 1.3 V @ 1 A, and junction capacitance is reduced to 10pF. The SF15GHB0G is ROHS3 Compliant and REACH Unaffected.

Selection Basis:

• Both substitute parts meet or exceed the minimum electrical requirements of the HER104-AP
• Both maintain DO-41 through-hole package compatibility
• Both are ROHS3 Compliant, satisfying regulatory requirements
• HER104G-AP is recommended for direct replacement requiring identical specifications
• SF15GHB0G is recommended for applications requiring automotive-grade qualification or extended temperature operation

Frequently Asked Questions (FAQ)

Q: Can HER104G-AP be used as a direct replacement for HER104-AP?

A: Yes. The HER104G-AP is electrically and mechanically compatible with the HER104-AP. Both parts share identical voltage ratings (300 V), current ratings (1 A), reverse recovery time (50 ns), and operating temperature range (-55°C ~ 125°C). The HER104G-AP is the active product variant from the same manufacturer.

Q: What are the differences between HER104G-AP and SF15GHB0G?

A: Both parts meet the core electrical requirements of the HER104-AP. Key differences include: manufacturer (Micro Commercial Co versus Taiwan Semiconductor Corporation), reverse recovery time (50 ns versus 35 ns), forward voltage drop (1 V versus 1.3 V @ 1 A), operating temperature range (-55°C ~ 125°C versus -55°C ~ 150°C), and automotive qualification (SF15GHB0G carries AEC-Q101). The SF15GHB0G offers faster switching and extended temperature capability.

Q: Are all substitute parts available in DO-41 package?

A: Yes. All substitute parts are supplied in DO-204AL, DO-41, or Axial package configurations. The HER104G-AP is supplied in Tape & Box packaging. All parts are through-hole mounted and mechanically compatible with the original HER104-AP footprint.

Q: Do the substitute parts meet RoHS compliance?

A: Yes. Both HER104G-AP and SF15GHB0G are ROHS3 Compliant. The SF15GHB0G is additionally REACH Unaffected.

Q: What is the reverse leakage current difference between the main part and substitutes?

A: The HER104-AP specifies 5 mA reverse leakage at 300 V. Both HER104G-AP and SF15GHB0G specify 5 µA reverse leakage at 300 V, representing a 1000-fold improvement. This enhanced leakage performance is typical of active production variants.

Q: Can SF15GHB0G be used in applications requiring the exact -55°C ~ 125°C temperature range?

A: Yes. The SF15GHB0G operating temperature range of -55°C ~ 150°C encompasses the -55°C ~ 125°C requirement of the HER104-AP. The extended upper temperature limit provides additional margin without compromising compatibility.

Q: Are there any forward voltage considerations when substituting?

A: Forward voltage differences exist between parts: HER104-AP (1.1 V @ 1 A), HER104G-AP (1 V @ 1 A), and SF15GHB0G (1.3 V @ 1 A). These variations are within typical rectifier diode tolerances and do not affect functional compatibility in standard rectification circuits. Applications with strict voltage drop requirements should account for the SF15GHB0G's higher forward voltage.