BAS21THVL Equivalent & Substitute Parts

Part Overview

The BAS21THVL is a general-purpose rectifier diode manufactured by Nexperia USA Inc., rated for 200 V DC reverse voltage and 200 mA average rectified current in a surface mount TO-236AB package. This component is classified as a small-signal diode suitable for applications requiring fast switching characteristics and automotive-grade reliability. The part maintains Active product status with AEC-Q101 qualification and ROHS3 compliance.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across the specified parameter set, enabling design flexibility and supply chain continuity.

Substiute Parts

BAS21THVL

Nexperia USA Inc.In Stock: 10663BAS21THVL Datasheet

Current PartRFQ

BAS21THR

Nexperia USA Inc.In Stock: 3997BAS21THR Datasheet

Parametric EquivalentRFQ

MMBD1504A

onsemiIn Stock: 44123MMBD1504A Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BAS21THVL are classified based on matching electrical performance within the specified parameter tolerances and mechanical compatibility with the TO-236-3 / SOT-23-3 package footprint.

Parametric Equivalent Classification: Parts meeting all critical electrical parameters are classified as parametric equivalents. These include identical voltage ratings (200 V), current ratings (200 mA), forward voltage characteristics, reverse recovery time, and surface mount packaging in the same footprint.

Similar Manufacturer Classification: Parts with equivalent voltage and current ratings but differing in secondary characteristics such as diode configuration (single vs. array), forward voltage tolerance, or reverse leakage specifications are classified as similar manufacturers. These parts maintain functional compatibility within the same package family but require circuit-level verification for specific applications.

Key Parameters Determining Substitution:

• Voltage - DC Reverse (Vr) (Max): 200 V
• Current - Average Rectified (Io): 200 mA
• Package / Case: TO-236-3, SC-59, SOT-23-3
• Mounting Type: Surface Mount
• Technology: Standard

Parameter Comparison

Engineering Selection Recommendations

BAS21THR (Parametric Equivalent): The BAS21THR is a direct parametric equivalent to the BAS21THVL, manufactured by Nexperia USA Inc. Both parts share identical electrical specifications across all critical parameters: 200 V reverse voltage, 200 mA average rectified current, 1.25 V forward voltage at 200 mA, 50 ns reverse recovery time, and 100 nA reverse leakage at 200 V. Both maintain automotive-grade classification with AEC-Q101 qualification, ROHS3 compliance, and identical operating temperature ratings of 175°C. The parts are functionally interchangeable at the circuit level with no design modifications required. Selection between BAS21THVL and BAS21THR is determined by inventory availability and packaging format (Tape & Reel).

MMBD1504A (Similar Manufacturer): The MMBD1504A, manufactured by onsemi, maintains equivalent voltage and current ratings (200 V, 200 mA per diode) and identical package footprint (TO-236-3, SC-59, SOT-23-3). However, this part differs in configuration as a diode array with 1 pair common cathode topology, compared to the single-diode configuration of BAS21THVL. The MMBD1504A exhibits superior reverse leakage performance (10 nA @ 180 V versus 100 nA @ 200 V) and lower forward voltage (1.1 V @ 200 mA versus 1.25 V @ 200 mA). The maximum operating temperature is 150°C, which is 25°C lower than the BAS21THVL. The MMBD1504A does not carry automotive-grade or AEC-Q101 qualification. Selection of MMBD1504A requires circuit-level evaluation to confirm compatibility with the common cathode configuration and thermal operating range.

Frequently Asked Questions (FAQ)

Q: Can BAS21THR be used as a direct replacement for BAS21THVL?

A: Yes. BAS21THR is a parametric equivalent with identical electrical specifications, automotive-grade classification, AEC-Q101 qualification, and operating temperature range. No circuit modifications are required for substitution.

Q: What is the primary difference between BAS21THVL and MMBD1504A?

A: BAS21THVL is a single-diode configuration, while MMBD1504A is a diode array with 1 pair common cathode topology. Additionally, MMBD1504A has a lower maximum operating temperature (150°C vs. 175°C) and does not carry automotive-grade or AEC-Q101 qualification. Circuit-level compatibility must be confirmed before substitution.

Q: Are all three parts compatible with the same PCB footprint?

A: Yes. BAS21THVL, BAS21THR, and MMBD1504A all use the TO-236-3 / SC-59 / SOT-23-3 package footprint and are surface mount components. PCB layout compatibility is maintained across all three parts.

Q: Does MMBD1504A meet automotive qualification requirements?

A: No. MMBD1504A does not carry automotive-grade classification or AEC-Q101 qualification. If automotive-grade compliance is required, BAS21THVL or BAS21THR must be selected.

Q: What is the significance of the common cathode configuration in MMBD1504A?

A: The MMBD1504A contains two diodes with a shared cathode connection. This configuration is suitable for specific circuit topologies but differs from the single-diode configuration of BAS21THVL. Circuit schematic verification is required to confirm functional compatibility.

Q: How do forward voltage specifications compare across the three parts?

A: BAS21THVL and BAS21THR both specify 1.25 V maximum forward voltage at 200 mA. MMBD1504A specifies 1.1 V maximum forward voltage at 200 mA, representing lower forward voltage drop. This difference may affect power dissipation calculations in high-current applications.

Q: Are all parts RoHS3 compliant?

A: Yes. BAS21THVL, BAS21THR, and MMBD1504A are all ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited).