1A1-AP Equivalent & Substitute Parts

Part Overview

The 1A1-AP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 50 V DC reverse voltage and 1 A average rectified current in an R-1 axial through-hole package. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity. The 1A1-AP remains functionally available through alternative manufacturers offering identical electrical specifications in compatible package configurations.

Substiute Parts

1A1-AP

Micro Commercial CoIn Stock: 11371A1-AP Datasheet

Current PartRFQ

1N4001-G

Comchip TechnologyIn Stock: 563741N4001-G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1A1-AP is based on electrical parameter equivalence across the following criteria:

Electrical Equivalence Requirements:

• Voltage - DC Reverse (Vr) (Max): 50 V
• Current - Average Rectified (Io): 1 A
• Voltage - Forward (Vf) (Max) @ If: 1.1 V @ 1 A
• Speed: Standard Recovery >500ns, > 200mA (Io)
• Current - Reverse Leakage @ Vr: 5 µA @ 50 V
• Capacitance @ Vr, F: 15pF @ 4V, 1MHz
• Operating Temperature - Junction: -55°C ~ 150°C

Mechanical Compatibility Requirements:

• Mounting Type: Through Hole
• Package Type: Axial configuration

The 1N4001-G manufactured by Comchip Technology meets all electrical specifications and operates in a compatible through-hole axial package (DO-41), enabling direct functional substitution. The primary distinction is packaging format (R-1 versus DO-41), both of which are standard axial through-hole configurations suitable for equivalent circuit applications.

Parameter Comparison

Engineering Selection Recommendations

The 1N4001-G from Comchip Technology is the qualified substitute for the obsolete 1A1-AP. Selection is based on the following factors:

Electrical Equivalence: All critical electrical parameters are identical, including reverse voltage rating, forward current capacity, forward voltage drop, recovery speed, reverse leakage current, and junction capacitance. These parameters ensure functional interchangeability in rectification applications.

Compliance Status: Both components maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity classification, satisfying regulatory and environmental requirements.

Product Availability: The 1N4001-G maintains active product status with substantial inventory availability (56,269 pieces), providing reliable procurement continuity compared to the obsolete 1A1-AP.

Package Compatibility: Both components utilize through-hole axial mounting configurations. The 1N4001-G employs the DO-41 package standard, which is mechanically compatible with R-1 axial footprints in typical through-hole circuit board layouts.

Frequently Asked Questions (FAQ)

Q: Can the 1N4001-G directly replace the 1A1-AP in existing designs?

A: Yes. The 1N4001-G provides electrical equivalence across all specified parameters. Both components are through-hole axial diodes with identical voltage, current, and thermal ratings. Physical lead spacing in standard axial packages is compatible with existing PCB layouts designed for the 1A1-AP.

Q: What is the difference between the R-1 and DO-41 packages?

A: Both R-1 and DO-41 are standard axial through-hole package designations for rectifier diodes. The primary distinction is the package naming convention used by different manufacturers. Both employ identical lead configurations and mounting methods suitable for through-hole PCB assembly.

Q: Are there compliance differences between the 1A1-AP and 1N4001-G?

A: No. Both components maintain ROHS3 compliance and identical moisture sensitivity levels (MSL Level 1, Unlimited). No additional compliance considerations apply to substitution.

Q: Why is the 1A1-AP listed as obsolete?

A: Obsolescence reflects manufacturer discontinuation of the specific part number. The 1N4001-G provides equivalent functionality from an active manufacturer, ensuring continued availability for new production and replacement applications.

Q: Are there electrical performance differences in forward voltage or reverse leakage?

A: No. Both components specify identical forward voltage (1.1 V @ 1 A) and reverse leakage current (5 µA @ 50 V). Electrical performance is equivalent across all operating conditions within the specified temperature range.

Q: Can the 1N4001-G be used in high-frequency applications?

A: Both components specify standard recovery speed (>500ns, >200mA). Recovery characteristics are identical, making the 1N4001-G suitable for applications within the standard recovery classification.