BAS21LS-QYL Equivalent & Substitute Parts

Part Overview

The BAS21LS-QYL is a general-purpose fast recovery diode manufactured by Nexperia USA Inc., designed for surface mount applications in automotive-grade circuits. This component operates at 200 V DC reverse voltage with a 250 mA average rectified current rating and features a reverse recovery time of 50 nanoseconds, making it suitable for high-frequency switching applications. The device is currently in active production status with AEC-Q100 automotive qualification and ROHS3 compliance. Identifying equivalent and substitute parts is necessary to ensure design flexibility, manage supply chain continuity, and maintain performance specifications across manufacturing batches and procurement cycles.

Substiute Parts

BAS21LS-QYL

Nexperia USA Inc.In Stock: 3720BAS21LS-QYL Datasheet

Current PartRFQ

BAS21LS-QYL

Nexperia USA Inc.In Stock: 3720BAS21LS-QYL Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BAS21LS-QYL is determined by strict equivalence across the following critical parameters:

Electrical Specifications:

• Voltage - DC Reverse (Vr) (Max): 200 V
• Current - Average Rectified (Io): 250 mA
• Voltage - Forward (Vf) (Max) @ If: 1.25 V @ 200 mA
• Reverse Recovery Time (trr): 50 ns
• Current - Reverse Leakage @ Vr: 100 nA @ 200 V
• Capacitance @ Vr, F: 2 pF @ 0V, 1MHz

Mechanical & Environmental Specifications:

• Package / Case: SOD-882
• Mounting Type: Surface Mount
• Operating Temperature - Junction: 150°C
• Grade: Automotive
• Qualification: AEC-Q100

A substitute part must match all electrical parameters within the specified tolerances and maintain identical mechanical packaging, mounting configuration, and automotive qualification status. Parts that deviate from any of these parameters are not considered equivalent substitutes.

Parameter Comparison

Engineering Selection Recommendations

The BAS21LS-QYL is an active production component with full automotive qualification (AEC-Q100) and ROHS3 compliance. When selecting equivalent or substitute parts, the following engineering criteria apply:

Product Status Consideration: Both the main part and substitute must maintain active production status to ensure long-term availability and consistent manufacturing quality.

Compliance & Certification: Substitute parts must retain AEC-Q100 automotive qualification and ROHS3 compliance status. These certifications are mandatory for automotive-grade applications and cannot be compromised during substitution.

Electrical Performance: All electrical parameters, including reverse voltage rating, average rectified current, forward voltage drop, reverse recovery time, reverse leakage current, and junction capacitance, must match exactly. Deviations in any parameter will alter circuit performance and reliability.

Mechanical Compatibility: The SOD-882 package and surface mount configuration must be preserved to ensure PCB layout compatibility and assembly process alignment. Package changes require design re-qualification.

Temperature Rating: The 150°C junction temperature rating must be maintained to ensure thermal margin in automotive operating environments.

Selection of substitute parts outside these defined parameters will result in functional incompatibility and potential circuit failure.

Frequently Asked Questions (FAQ)

Q: Can the BAS21LS-QYL be substituted with a different manufacturer's equivalent diode?

A: Substitution is limited to parts that match all specified electrical and mechanical parameters. Cross-manufacturer substitutes must be verified against the complete parameter set, including reverse voltage, average rectified current, forward voltage drop, reverse recovery time, reverse leakage current, capacitance, package type, and automotive qualification status. The provided substitute list contains only parts that meet these criteria.

Q: What is the significance of the 50 nanosecond reverse recovery time?

A: The reverse recovery time (trr) of 50 ns classifies this diode as a fast recovery device, suitable for high-frequency switching applications. This parameter directly affects switching losses and electromagnetic interference characteristics. Substitute parts must maintain this specification to preserve circuit performance.

Q: Is the SOD-882 package interchangeable with other small outline packages?

A: No. The SOD-882 package is a specific form factor with defined pin spacing, lead geometry, and thermal characteristics. Substitution with alternative packages (such as SOD-323 or SOD-523) requires PCB redesign and re-qualification. Only parts specified in the SOD-882 package are mechanically compatible.

Q: Why is AEC-Q100 qualification mandatory for substitutes?

A: AEC-Q100 qualification certifies that the component meets automotive industry reliability and quality standards, including thermal cycling, moisture resistance, and long-term stability requirements. Automotive applications require this certification; parts without AEC-Q100 qualification are not acceptable substitutes.

Q: Can a diode with higher reverse voltage rating substitute for the BAS21LS-QYL?

A: No. While a higher voltage rating may appear to offer additional margin, it typically introduces undesired changes in other parameters such as capacitance, leakage current, or forward voltage drop. Substitutes must match the specified 200 V rating exactly to maintain circuit design intent and performance characteristics.

Q: What does ROHS3 compliance mean for this component?

A: ROHS3 compliance indicates that the component meets the Restriction of Hazardous Substances Directive, restricting the use of lead, cadmium, mercury, and other hazardous materials. This certification is required for most commercial and automotive applications. Substitute parts must maintain ROHS3 compliance status.

Q: How does the 2 pF capacitance specification affect circuit design?

A: The junction capacitance of 2 pF at 0 V and 1 MHz affects high-frequency circuit behavior, including switching speed and signal integrity. Substitute parts must maintain this capacitance specification to prevent unintended changes in circuit frequency response or switching characteristics.

Q: Is the BAS21LS-QYL suitable for all automotive temperature ranges?

A: The 150°C junction temperature rating supports standard automotive operating environments. Substitute parts must maintain this temperature rating. Applications requiring extended temperature ranges or specialized thermal conditions require separate component qualification.