MUR105-AP Equivalent & Substitute Parts

Part Overview

The MUR105-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 through-hole axial package. Manufactured by Micro Commercial Co, this component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity. The MUR105-AP operates across a junction temperature range of -50°C to 150°C and features fast recovery characteristics with a reverse recovery time of 45 ns, suitable for standard rectification applications in power supplies and signal conditioning circuits.

Substiute Parts

MUR105-AP

Micro Commercial CoIn Stock: 1030MUR105-AP Datasheet

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HER101G B0G

Taiwan Semiconductor CorporationIn Stock: 1005HER101G B0G Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the MUR105-AP is determined by strict equivalence across the following critical electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Voltage - DC Reverse (Vr) (Max): 50 V minimum
• Current - Average Rectified (Io): 1 A minimum
• Package / Case: DO-204AL, DO-41, or Axial equivalent
• Mounting Type: Through Hole

Compliance & Status Criteria:

• RoHS3 Compliance required
• Moisture Sensitivity Level (MSL): 1 (Unlimited) or equivalent
• Active or current product status preferred due to obsolescence of main part

The HER101G B0G, manufactured by Taiwan Semiconductor Corporation, meets all substitution criteria. This part maintains identical voltage and current ratings, operates within compatible temperature ranges, and is housed in the same DO-204AL (DO-41) axial through-hole package. The HER101G B0G is currently in active production status, ensuring long-term availability and supply chain continuity.

Parameter Comparison

Engineering Selection Recommendations

The HER101G B0G is the primary substitute for the MUR105-AP based on the following engineering criteria:

Electrical Compatibility: Both diodes maintain identical voltage and current ratings (50 V, 1 A), ensuring direct functional replacement in rectification circuits. The HER101G B0G exhibits marginally higher forward voltage (1 V versus 975 mV) and slightly longer reverse recovery time (50 ns versus 45 ns), both within acceptable tolerances for standard rectifier applications and representing negligible performance differences in typical power supply designs.

Package & Mechanical Compatibility: Both components utilize the DO-204AL (DO-41) axial through-hole package, enabling direct board-level substitution without PCB redesign or mechanical rework.

Compliance & Availability: The HER101G B0G holds active product status with ROHS3 compliance and unlimited moisture sensitivity rating, providing superior supply chain continuity compared to the obsolete MUR105-AP. The substitute part is currently in stock with 904 units available.

Temperature Performance: The HER101G B0G extends the lower operating temperature limit to -55°C (versus -50°C), providing enhanced performance margin in cold-environment applications while maintaining the same upper temperature limit of 150°C.

Frequently Asked Questions (FAQ)

Q: Can the HER101G B0G directly replace the MUR105-AP without circuit modification?

A: Yes. Both diodes share identical voltage (50 V) and current (1 A) ratings and are housed in the same DO-204AL (DO-41) axial through-hole package. Direct substitution is supported at the board level without circuit redesign.

Q: What is the significance of the forward voltage difference (975 mV versus 1 V)?

A: The 25 mV difference in forward voltage drop is negligible in standard rectification applications. This variance falls within normal manufacturing tolerances and produces minimal impact on power dissipation or circuit performance in typical power supply designs operating at 1 A.

Q: Does the 5 ns difference in reverse recovery time affect circuit performance?

A: No. The reverse recovery time difference (45 ns to 50 ns) is insignificant for standard rectifier applications. Both parts are classified as fast recovery diodes (≤500 ns) and perform identically in conventional power supply and signal conditioning circuits.

Q: Why is the HER101G B0G preferred over the MUR105-AP?

A: The HER101G B0G is in active production status, ensuring long-term availability and supply chain stability. The MUR105-AP is obsolete, creating procurement risk and potential future unavailability. Both parts are electrically and mechanically equivalent.

Q: Are there any compliance or certification differences between these parts?

A: Both the MUR105-AP and HER101G B0G are ROHS3 compliant with MSL rating of 1 (Unlimited). No compliance or certification barriers exist to substitution.

Q: Can the HER101G B0G be used in high-temperature applications?

A: Yes. The HER101G B0G operates across -55°C to 150°C, providing a 5°C lower temperature margin compared to the MUR105-AP (-50°C to 150°C). Both parts are suitable for the same high-temperature applications.

Q: What is the package designation DO-204AL, and how does it relate to DO-41?

A: DO-204AL is the formal JEDEC package designation for the axial through-hole diode package commonly referred to as DO-41. Both designations describe the same physical package used by the MUR105-AP and HER101G B0G.