1A3-AP Equivalent & Substitute Parts

Part Overview

The 1A3-AP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 200 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. The 1A3-AP remains functionally available through alternative part numbers that maintain identical electrical specifications and performance characteristics.

Substiute Parts

1A3-AP

Micro Commercial CoIn Stock: 9801A3-AP Datasheet

Current PartRFQ

1N4003-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 189701N4003-E3/54 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1A3-AP is based on electrical parameter equivalence across the following criteria:

Electrical Equivalence Requirements:

• Voltage - DC Reverse (Vr) (Max): 200 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 @ 200 V
• Capacitance @ Vr, F: 15 pF @ 4V, 1MHz
• Operating Temperature - Junction: -55°C ~ 150°C

Mechanical Compatibility:

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

The 1N4003-E3/54 meets all electrical specifications and operates within identical temperature ranges. While the package designation differs (DO-204AL/DO-41 versus R-1), both are axial through-hole configurations suitable for equivalent circuit board integration.

Parameter Comparison

Engineering Selection Recommendations

The 1N4003-E3/54 is the direct electrical equivalent for the 1A3-AP. Selection of this substitute is based on the following factors:

Compliance and Certification:

• Both parts maintain ROHS3 compliance
• Both parts carry MSL rating of 1 (Unlimited)
• Both parts are classified under identical ECCN (EAR99) and HTSUS (8541.10.0080) codes

Product Availability:

• The 1A3-AP is obsolete with limited inventory (914 Pcs)
• The 1N4003-E3/54 is active with substantial inventory (18,865 Pcs)
• The 1N4003-E3/54 is supplied in Cut Tape (CT) packaging, supporting automated assembly processes

Electrical Performance:

• All electrical parameters are identical across voltage, current, speed, leakage, and capacitance specifications
• Temperature operating range is identical
• Forward voltage characteristics are equivalent

The 1N4003-E3/54 is suitable for direct substitution in applications currently using the 1A3-AP, with the primary consideration being package form factor verification for board layout compatibility.

Frequently Asked Questions (FAQ)

Q: Can the 1N4003-E3/54 replace the 1A3-AP in existing designs?

A: Yes. The 1N4003-E3/54 is electrically equivalent across all specified parameters: 200 V reverse voltage, 1 A average rectified current, 1.1 V forward voltage at 1 A, standard recovery speed, 5 µA reverse leakage, and identical operating temperature range. Both are through-hole axial components.

Q: What is the difference between the R-1 and DO-204AL packages?

A: Both R-1 and DO-204AL are axial through-hole package designations for diodes. The R-1 is the legacy designation used by Micro Commercial Co, while DO-204AL (also referenced as DO-41) is the industry-standard designation used by Vishay. The physical form factor and lead spacing are compatible for through-hole board mounting.

Q: Are there compliance differences between these parts?

A: No. Both the 1A3-AP and 1N4003-E3/54 are ROHS3 compliant, carry MSL rating 1 (Unlimited), and share identical ECCN and HTSUS classifications.

Q: Why is the 1N4003-E3/54 preferred despite being a different part number?

A: The 1N4003-E3/54 is an active product with high inventory availability (18,865 Pcs), whereas the 1A3-AP is obsolete with limited stock (914 Pcs). The 1N4003-E3/54 is supplied in Cut Tape packaging, supporting high-volume automated assembly. All electrical specifications are identical.

Q: Can I use the 1N4003-E3/54 in new designs?

A: Yes. The 1N4003-E3/54 meets all electrical and compliance requirements for general-purpose rectification applications rated at 200 V and 1 A. The active product status ensures long-term availability and supply chain stability.

Q: What should I verify before substituting these parts?

A: Verify that your circuit board layout accommodates the axial through-hole package form factor. Confirm that the 200 V reverse voltage and 1 A current ratings meet your application requirements. Both parts operate identically across the -55°C to 150°C temperature range.