MUR140-AP Equivalent & Substitute Parts

Part Overview

The MUR140-AP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 400 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 MUR140-AP operates across a junction temperature range of -50°C to 150°C and complies with RoHS3 standards.

Substiute Parts

MUR140-AP

Micro Commercial CoIn Stock: 932MUR140-AP Datasheet

Current PartRFQ

MUR140GP-AP

Micro Commercial CoIn Stock: 721MUR140GP-AP Datasheet

DirectRFQ

1N4936GP-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 58551N4936GP-E3/54 Datasheet

SimilarRFQ

FR104G R1G

Taiwan Semiconductor CorporationIn Stock: 955FR104G R1G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MUR140-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 400 V
• Current - Average Rectified (Io): Must equal or exceed 1 A
• Voltage - Forward (Vf) (Max) @ If: Must not exceed 1.35 V @ 1 A
• Speed Classification: Must support Fast Recovery ≤ 500ns, > 200mA (Io)
• Current - Reverse Leakage @ Vr: Must not exceed 5 µA @ 400 V

Mechanical Compatibility Criteria:

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

Compliance Criteria:

• RoHS Status: Must be ROHS3 Compliant

All substitute parts listed below meet these criteria and are therefore electrically and mechanically interchangeable with the MUR140-AP in applications requiring a 400 V, 1 A general-purpose rectifier diode.

Parameter Comparison

Engineering Selection Recommendations

MUR140GP-AP (Micro Commercial Co): This part is the direct manufacturer equivalent to the MUR140-AP and maintains active product status. It shares identical electrical ratings and package specifications. The MUR140GP-AP offers improved reverse recovery time (45 ns versus 60 ns) and lower capacitance (10pF versus 20pF), with extended lower temperature operation (-65°C versus -50°C). This part is recommended as the primary replacement for obsolete MUR140-AP applications.

1N4936GP-E3/54 (Vishay General Semiconductor - Diodes Division): This part meets all electrical and mechanical compatibility requirements with superior forward voltage characteristics (1.2 V versus 1.35 V @ 1 A), resulting in lower power dissipation. The 1N4936GP-E3/54 provides the widest operating temperature range (-65°C to 175°C) and is supplied in the SUPERECTIFIER® series. Higher inventory availability (5826 pcs) supports procurement continuity. This part is suitable for applications where lower forward voltage drop is beneficial.

FR104G R1G (Taiwan Semiconductor Corporation): This part satisfies all electrical and mechanical compatibility criteria with forward voltage of 1.3 V @ 1 A. The FR104G R1G offers moderate reverse recovery time (150 ns) and operates across -55°C to 150°C. This part provides an alternative source for supply chain diversification.

All substitute parts listed are ROHS3 compliant and maintain the same through-hole DO-41 package configuration, ensuring direct mechanical and electrical interchangeability with the MUR140-AP.

Frequently Asked Questions (FAQ)

Q: Can MUR140GP-AP be used as a direct replacement for MUR140-AP?

A: Yes. The MUR140GP-AP is the direct manufacturer equivalent manufactured by Micro Commercial Co. Both parts share identical voltage ratings (400 V), current ratings (1 A), forward voltage specifications (1.35 V @ 1 A), and package configuration (DO-41 through-hole). The MUR140GP-AP maintains active product status and is the recommended replacement for the obsolete MUR140-AP.

Q: What are the key electrical parameters that determine substitution compatibility?

A: Substitution compatibility is determined by: (1) Voltage - DC Reverse (Vr) (Max) equal to or exceeding 400 V, (2) Current - Average Rectified (Io) equal to or exceeding 1 A, (3) Voltage - Forward (Vf) (Max) @ If not exceeding 1.35 V @ 1 A, (4) Fast Recovery speed classification ≤ 500ns for currents > 200mA (Io), and (5) Reverse Leakage Current not exceeding 5 µA @ 400 V. All listed substitute parts meet these criteria.

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

A: Yes. All substitute parts are available in DO-204AL, DO-41, or Axial package configurations with through-hole mounting. The DO-41 package designation is consistent across all parts, ensuring mechanical interchangeability in existing PCB layouts.

Q: What is the difference between MUR140-AP and MUR140GP-AP?

A: The primary differences are product status and performance characteristics. MUR140-AP is obsolete, while MUR140GP-AP is active. MUR140GP-AP offers improved reverse recovery time (45 ns versus 60 ns), lower capacitance (10pF versus 20pF @ 4V, 1MHz), and extended lower temperature operation (-65°C versus -50°C). Electrical ratings remain identical.

Q: Which substitute part offers the lowest forward voltage drop?

A: The 1N4936GP-E3/54 offers the lowest forward voltage drop at 1.2 V @ 1 A, compared to 1.35 V @ 1 A for the MUR140-AP. This results in reduced power dissipation in applications with continuous current flow.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant, meeting environmental and regulatory requirements equivalent to the original MUR140-AP.

Q: What is the operating temperature range for each substitute part?

A: MUR140GP-AP operates from -65°C to 150°C, 1N4936GP-E3/54 from -65°C to 175°C, and FR104G R1G from -55°C to 150°C. The original MUR140-AP operates from -50°C to 150°C. Selection should account for application-specific temperature requirements.