BAV18-TR Equivalent & Substitute Parts

Part Overview

The BAV18-TR is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division. This through-hole component operates at 50 V DC reverse voltage with 250 mA average rectified current and features fast recovery characteristics with a 50 ns reverse recovery time. The device is housed in a DO-204AH (DO-35) axial package and maintains an active product status with automotive-grade qualification under AEC-Q101 standards. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, supply chain considerations, or application-specific requirements.

Substiute Parts

BAV18-TR

Vishay General Semiconductor - Diodes DivisionIn Stock: 709BAV18-TR Datasheet

Current PartRFQ

1N4454

Microchip TechnologyIn Stock: 103971N4454 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BAV18-TR is determined by the following critical electrical and mechanical parameters:

Voltage Rating: The substitute part must support a DC reverse voltage (Vr) equal to or greater than 50 V to ensure safe operation within the application circuit.

Current Rating: The substitute part must support an average rectified current (Io) equal to or greater than 250 mA to handle the intended load without thermal stress.

Package Compatibility: The substitute part must use the DO-204AH (DO-35) axial through-hole package to ensure mechanical fit and PCB mounting compatibility.

Recovery Characteristics: The substitute part must operate as a fast recovery or small signal diode to maintain switching performance within acceptable parameters.

Reverse Leakage: The substitute part must maintain reverse leakage current at or below 100 nA @ 50 V to preserve circuit performance.

Temperature Rating: The substitute part must support a maximum junction temperature of 175°C or higher to match thermal operating conditions.

The 1N4454 is identified as a manufacturer-recommended substitute based on these criteria.

Parameter Comparison

Engineering Selection Recommendations

BAV18-TR Selection: The BAV18-TR is recommended for applications requiring 250 mA average rectified current with automotive-grade qualification. This part maintains active product status and ROHS3 compliance, making it suitable for automotive and industrial applications subject to AEC-Q101 qualification requirements.

1N4454 Selection: The 1N4454 is a manufacturer-recommended substitute when BAV18-TR inventory is unavailable. This part provides superior voltage rating (75 V) and faster recovery time (4 ns), making it suitable for applications that do not require the full 250 mA current rating of the BAV18-TR. However, the 1N4454 is rated for 200 mA average rectified current, which is 50 mA below the BAV18-TR specification. The 1N4454 is not RoHS3 compliant, which may restrict its use in applications with strict environmental compliance requirements.

Compliance Considerations: The BAV18-TR maintains ROHS3 compliance and AEC-Q101 automotive qualification. The 1N4454 does not carry RoHS compliance certification. Applications requiring automotive-grade components or RoHS3 compliance should prioritize the BAV18-TR.

Frequently Asked Questions (FAQ)

Q: Can the 1N4454 directly replace the BAV18-TR in all applications?

A: The 1N4454 is electrically compatible for applications operating below 200 mA average rectified current. Applications requiring the full 250 mA rating of the BAV18-TR cannot use the 1N4454 as a direct substitute. The 1N4454 does not carry RoHS3 compliance, which may disqualify it from applications with environmental compliance requirements.

Q: What is the primary difference between the BAV18-TR and 1N4454?

A: The primary difference is the average rectified current rating. The BAV18-TR is rated for 250 mA, while the 1N4454 is rated for 200 mA. The 1N4454 provides higher voltage rating (75 V vs. 50 V) and faster recovery time (4 ns vs. 50 ns). The BAV18-TR maintains automotive-grade qualification and RoHS3 compliance, while the 1N4454 does not.

Q: Are the packages identical between BAV18-TR and 1N4454?

A: Yes. Both parts use the DO-204AH (DO-35) axial through-hole package. Mechanical fit and PCB mounting are identical, allowing for direct physical substitution without layout modifications.

Q: What applications require the 250 mA rating of the BAV18-TR?

A: Applications with average rectified current demands at or above 200 mA require the BAV18-TR. The 1N4454, rated for 200 mA, operates at its maximum specification in such applications and does not provide current margin.

Q: Is the 1N4454 suitable for automotive applications?

A: The 1N4454 is not automotive-grade and does not carry AEC-Q101 qualification. Automotive applications requiring AEC-Q101 certification must use the BAV18-TR.

Q: What is the significance of reverse recovery time in these diodes?

A: Reverse recovery time (trr) determines switching speed. The BAV18-TR has a 50 ns recovery time, while the 1N4454 has a 4 ns recovery time. Faster recovery reduces switching losses and improves high-frequency performance. The 1N4454 is superior for high-speed switching applications.

Q: Can the BAV18-TR be used in place of the 1N4454?

A: Yes. The BAV18-TR exceeds the 1N4454 specifications in current rating (250 mA vs. 200 mA) and maintains equivalent voltage rating and reverse leakage characteristics. The BAV18-TR is suitable for any application requiring the 1N4454, with the added benefit of higher current capacity and automotive qualification.