BAS21J/ZLF Equivalent & Substitute Parts

Part Overview

The BAS21J/ZLF is a general-purpose fast recovery diode rated for 300 V DC reverse voltage and 250 mA average rectified current in a surface mount SOD-323F package. Manufactured by Nexperia USA Inc., this component is classified as obsolete, necessitating identification of active equivalent alternatives for ongoing production and design requirements. The diode features automotive-grade qualification under AEC-Q101 and is ROHS3 compliant, making it suitable for automotive and industrial applications requiring fast switching characteristics with 50 ns reverse recovery time.

Substiute Parts

BAS21J/ZLF

Nexperia USA Inc.In Stock: 980BAS21J/ZLF Datasheet

Current PartRFQ

BAS21J,115

Nexperia USA Inc.In Stock: 8938BAS21J,115 Datasheet

DirectRFQ

BAS21JF

Nexperia USA Inc.In Stock: 10472BAS21JF Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BAS21J/ZLF is determined by electrical and mechanical parameter equivalence across the following criteria:

Electrical Parameters (Critical for Substitution):

• Voltage - DC Reverse (Vr) (Max): 300 V
• Current - Average Rectified (Io): 250 mA
• Voltage - Forward (Vf) (Max) @ If: 1.1 V @ 100 mA
• Reverse Recovery Time (trr): 50 ns
• Operating Temperature - Junction (Max): 150°C

Mechanical Parameters (Critical for Substitution):

• Package / Case: SC-90, SOD-323F
• Mounting Type: Surface Mount
• Supplier Device Package: SOD-323F

Compliance Parameters:

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)
• REACH Status: REACH Unaffected

Two active substitute parts meet these criteria with identical electrical specifications and package configuration. Differences in product status, packaging format, and reverse leakage current specifications are noted in the parameter comparison table.

Parameter Comparison

Engineering Selection Recommendations

BAS21J,115 Selection Criteria: This substitute is active and available in high inventory volume (8900 pcs). It maintains electrical equivalence across all critical parameters including reverse voltage, forward voltage, and reverse recovery time. The reverse leakage current specification of 150 nA @ 250 V represents a minor increase from the main part's 100 nA specification, remaining within acceptable operational margins for general-purpose rectification applications. Qualification under AEC-Q100 provides automotive-grade reliability. Packaging in Cut Tape and Digi-Reel formats accommodates both manual and automated assembly workflows.

BAS21JF Selection Criteria: This substitute is active with the highest inventory availability (10462 pcs) and maintains complete electrical equivalence to the main part, including identical reverse leakage current specification of 100 nA @ 250 V. Qualification under AEC-Q101 matches the original part's certification level. Tape & Reel packaging format is optimized for high-volume automated surface mount assembly processes. This part represents the closest functional equivalent to the obsolete BAS21J/ZLF.

Both substitutes are manufactured by Nexperia USA Inc., ensuring consistent quality and reliability standards. Selection between BAS21J,115 and BAS21JF depends on assembly process requirements and packaging format compatibility with production equipment.

Frequently Asked Questions (FAQ)

Q: Can BAS21J,115 and BAS21JF be used interchangeably with BAS21J/ZLF?

A: Both parts are electrically equivalent to BAS21J/ZLF across all critical parameters: 300 V reverse voltage, 250 mA average rectified current, 1.1 V forward voltage at 100 mA, and 50 ns reverse recovery time. Substitution is valid from an electrical standpoint. Packaging format differences (Cut Tape vs. Tape & Reel) affect assembly process compatibility, not circuit functionality.

Q: What is the difference in reverse leakage current between the substitutes?

A: BAS21J,115 specifies 150 nA @ 250 V reverse leakage, while BAS21JF specifies 100 nA @ 250 V. Both values are within acceptable operational ranges for general-purpose rectification. The 50 nA difference does not affect circuit performance in standard applications.

Q: Are both substitutes automotive-qualified?

A: Yes. BAS21J,115 holds AEC-Q100 qualification, and BAS21JF holds AEC-Q101 qualification. Both certifications confirm automotive-grade reliability and are suitable for automotive applications. AEC-Q101 represents an additional qualification level.

Q: What packaging formats are available for each substitute?

A: BAS21J,115 is supplied in Cut Tape (CT) and Digi-Reel® formats, suitable for both manual and automated assembly. BAS21JF is supplied in Tape & Reel (TR) format, optimized for high-volume automated surface mount assembly lines.

Q: Is the SOD-323F package identical across all three parts?

A: Yes. All three parts use the SC-90, SOD-323F surface mount package with identical mechanical and electrical interface specifications. No PCB layout or footprint modifications are required when substituting between these parts.

Q: Are both substitutes ROHS3 compliant?

A: Yes. Both BAS21J,115 and BAS21JF are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited), matching the compliance profile of the main part BAS21J/ZLF.

Q: Which substitute should be selected for new production designs?

A: BAS21JF is recommended for new production designs due to complete electrical equivalence (including identical reverse leakage current), AEC-Q101 qualification matching the original part, and highest inventory availability. BAS21J,115 is a valid alternative when Cut Tape packaging format is required for assembly processes.