FR151S-AP Equivalent & Substitute Parts

Part Overview

The FR151S-AP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 50 V DC reverse voltage and 1.5 A average rectified current in a DO-41 through-hole axial package. This part is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design support and procurement continuity. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts provide functional alternatives with allowable parameter variations within the same product category.

Substiute Parts

FR151S-AP

Micro Commercial CoIn Stock: 873FR151S-AP Datasheet

Current PartRFQ

FR151GP-AP

Micro Commercial CoIn Stock: 992FR151GP-AP Datasheet

DirectRFQ

1N4001-G

Comchip TechnologyIn Stock: 563741N4001-G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FR151S-AP is determined by the following critical parameters:

Electrical Compatibility Criteria:

• Voltage - DC Reverse (Vr) (Max): Must equal or exceed 50 V
• Current - Average Rectified (Io): Must equal or exceed 1.5 A
• Operating Temperature - Junction: Must span -55°C to 150°C or equivalent range
• RoHS Status: Must maintain ROHS3 compliance

Mechanical Compatibility Criteria:

• Mounting Type: Through Hole required
• Package Category: DO-41 or equivalent axial package acceptable

Identified Substitute Categories:

1. Direct Equivalent (Package Variant): FR151GP-AP maintains identical electrical specifications with alternative DO-15 package, same manufacturer base product series.

2. Functional Substitute (Current Derating): 1N4001-G provides 50 V reverse voltage rating with reduced current capacity (1 A versus 1.5 A), standard recovery speed classification, and active product status.

Parameter Comparison

Engineering Selection Recommendations

FR151GP-AP (Direct Equivalent - Recommended Primary Substitute):

The FR151GP-AP is the preferred substitute for FR151S-AP applications. Both parts share identical electrical specifications, including 50 V reverse voltage, 1.5 A current rating, 1.3 V forward voltage, and 150 ns reverse recovery time. The FR151GP-AP maintains the same base product series (FR151) and manufacturer (Micro Commercial Co), ensuring design continuity. The primary difference is the package format: DO-15 instead of DO-41. Both are through-hole axial packages with equivalent footprint compatibility in most circuit board layouts. The FR151GP-AP holds active product status with ROHS3 compliance and 889 units in stock, providing immediate procurement availability.

1N4001-G (Functional Substitute - Current-Limited Applications):

The 1N4001-G is a functional substitute applicable to designs where the average rectified current requirement does not exceed 1 A. This part maintains the 50 V reverse voltage rating and -55°C to 150°C operating temperature range. The 1N4001-G exhibits lower forward voltage (1.1 V @ 1 A) and uses standard recovery speed classification (>500 ns) rather than fast recovery. This part is manufactured by Comchip Technology, holds active product status, and maintains ROHS3 compliance. The 1N4001-G is available in high volume (56,269 units in stock) and is supplied in cut tape packaging.

Product Status Consideration:

The FR151S-AP is classified as obsolete. Both substitute parts hold active product status, ensuring long-term availability and supply chain stability for new designs and production continuity.

Frequently Asked Questions (FAQ)

Q: Can FR151GP-AP directly replace FR151S-AP in existing designs?

A: The FR151GP-AP provides direct electrical substitution with identical voltage, current, and temperature specifications. The primary design consideration is package format: FR151GP-AP uses DO-15 package while FR151S-AP uses DO-41. Both are through-hole axial packages. PCB layout modifications may be required if the original design has fixed footprint constraints specific to DO-41 dimensions.

Q: What is the key difference between FR151GP-AP and 1N4001-G?

A: The FR151GP-AP maintains the full 1.5 A current rating of the original FR151S-AP, while 1N4001-G is rated for 1 A maximum average rectified current. The 1N4001-G is suitable only for applications where circuit current requirements do not exceed 1 A. Both parts maintain 50 V reverse voltage rating and identical operating temperature range.

Q: Are both substitute parts RoHS compliant?

A: Yes. Both FR151GP-AP and 1N4001-G are ROHS3 compliant, matching the compliance status of the original FR151S-AP.

Q: What is the difference between fast recovery and standard recovery speed classifications?

A: The FR151S-AP and FR151GP-AP are classified as fast recovery with reverse recovery time (trr) of 150 ns. The 1N4001-G uses standard recovery classification (>500 ns). Fast recovery diodes are suitable for high-frequency switching applications, while standard recovery diodes are appropriate for lower-frequency rectification circuits. Selection depends on circuit operating frequency requirements.

Q: Why is the FR151S-AP listed as obsolete?

A: Obsolete status indicates the part is no longer manufactured by the original supplier. The FR151GP-AP and 1N4001-G are active products with current manufacturing and supply availability.

Q: Can 1N4001-G be used in all FR151S-AP applications?

A: The 1N4001-G is suitable only for applications where the average rectified current does not exceed 1 A. If the circuit requires the full 1.5 A capacity of the FR151S-AP, the 1N4001-G is not appropriate. The FR151GP-AP is the correct substitute for full current capacity requirements.

Q: What are the packaging differences between DO-41 and DO-15?

A: Both DO-41 and DO-15 are through-hole axial packages for diodes. DO-41 (DO-204AL) and DO-15 (DO-204AC) differ in physical dimensions and lead spacing. PCB design files may require layout adjustment if the original design specifies fixed DO-41 footprint dimensions.