CDBA240SLR-HF Equivalent & Substitute Parts

Part Overview

The CDBA240SLR-HF is a Schottky rectifier diode manufactured by Comchip Technology, rated for 40 V DC reverse voltage and 2 A average rectified current in a DO-214AC (SMA) surface mount package. This component is classified as obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this diode specification.

Substiute Parts

CDBA240SLR-HF

Comchip TechnologyIn Stock: 940CDBA240SLR-HF Datasheet

Current PartRFQ

B260A-13-F

Diodes IncorporatedIn Stock: 155234B260A-13-F Datasheet

DirectRFQ

B240AQ-13-F

Diodes IncorporatedIn Stock: 14254B240AQ-13-F Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CDBA240SLR-HF are selected based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Mandatory Matching Criteria:

• Technology: Schottky diode
• Current Rating: 2 A average rectified current (Io)
• Package / Case: DO-214AC, SMA surface mount
• Mounting Type: Surface Mount
• Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)
• Reverse Leakage: 500 µA @ rated voltage

Voltage Rating Compatibility: Substitute parts must maintain equal or greater DC reverse voltage (Vr) rating. The CDBA240SLR-HF operates at 40 V maximum. Substitutes rated at 40 V or higher are electrically compatible for applications designed for this voltage class.

Forward Voltage Consideration: Forward voltage (Vf) specifications vary among substitutes. Parts with lower Vf values provide improved efficiency; parts with higher Vf values remain functionally compatible within the same application circuit topology.

Two substitute parts meet these criteria:

1. B240AQ-13-F (Diodes Incorporated): Exact voltage match at 40 V, active product status, automotive qualified (AEC-Q101)
2. B260A-13-F (Diodes Incorporated): Higher voltage rating at 60 V, active product status, suitable for applications with voltage margin requirements

Parameter Comparison

Engineering Selection Recommendations

B240AQ-13-F Selection Criteria:

The B240AQ-13-F is the primary substitute for direct replacement of the CDBA240SLR-HF. This part maintains identical voltage and current ratings (40 V, 2 A), matching the original design specifications exactly. The B240AQ-13-F carries active product status from Diodes Incorporated, ensuring long-term supply availability. This part is qualified to AEC-Q101 automotive standards and complies with ROHS3 regulations, providing enhanced compliance documentation for regulated applications. The operating temperature range extends to -65°C, exceeding the original part's -50°C minimum specification.

B260A-13-F Selection Criteria:

The B260A-13-F serves as a substitute for applications requiring higher voltage margin or operating in elevated voltage environments. The 60 V rating provides 50% additional voltage headroom compared to the original 40 V specification. This part is suitable for circuit designs where voltage transient protection or future design flexibility is required. The B260A-13-F is active product status with unlimited MSL rating. Forward voltage is higher at 700 mV @ 2 A, which may impact circuit efficiency in power-sensitive applications.

Compliance and Supply Considerations:

Both substitute parts are manufactured by Diodes Incorporated, an established semiconductor supplier with documented supply chain stability. The CDBA240SLR-HF obsolete status necessitates transition to active alternatives. B240AQ-13-F provides the most direct functional replacement with automotive qualification. B260A-13-F provides an alternative with enhanced voltage rating for applications with specific design requirements.

Frequently Asked Questions (FAQ)

Q: Can B240AQ-13-F directly replace CDBA240SLR-HF in existing designs?

A: Yes. The B240AQ-13-F maintains identical voltage (40 V) and current (2 A) ratings, matching package specifications (DO-214AC, SMA), and equivalent electrical performance characteristics. No circuit redesign is required for direct substitution.

Q: What is the difference between B240AQ-13-F and B260A-13-F?

A: The primary difference is the maximum reverse voltage rating: B240AQ-13-F is rated at 40 V, while B260A-13-F is rated at 60 V. Both maintain 2 A current rating and identical package form factor. Forward voltage differs: B240AQ-13-F at 500 mV @ 2 A versus B260A-13-F at 700 mV @ 2 A.

Q: Is B260A-13-F compatible with circuits designed for 40 V operation?

A: Yes. A 60 V rated diode operates correctly in 40 V circuits. The higher voltage rating provides additional safety margin. However, the increased forward voltage (700 mV vs. 400 mV) may affect circuit efficiency and heat dissipation characteristics.

Q: What does AEC-Q101 qualification mean for B240AQ-13-F?

A: AEC-Q101 is an automotive industry qualification standard. This certification indicates the B240AQ-13-F meets stringent reliability, temperature cycling, and performance requirements for automotive applications. This qualification is relevant for designs requiring automotive-grade component documentation.

Q: Are both substitute parts RoHS compliant?

A: B240AQ-13-F is explicitly ROHS3 compliant. B260A-13-F RoHS status is not specified in the provided data. For applications requiring RoHS compliance documentation, B240AQ-13-F is the confirmed compliant option.

Q: What is the MSL rating and why does it matter?

A: Both the original part and substitutes carry MSL 1 (Unlimited) rating. This indicates unlimited shelf life and no moisture sensitivity restrictions during storage and handling. Standard PCB assembly processes are suitable without special moisture control measures.

Q: Can I use B240AQ-13-F in high-temperature applications?

A: B240AQ-13-F operates across -65°C to 150°C junction temperature range, exceeding the original CDBA240SLR-HF specification of -50°C to 150°C. The extended low-temperature rating provides additional operational margin for extreme environment applications.

Q: How do capacitance differences affect circuit performance?

A: Capacitance values differ among parts: CDBA240SLR-HF at 30 pF @ 4V, B240AQ-13-F at 200 pF @ 40V, and B260A-13-F at 200 pF @ 4V. Higher capacitance may affect high-frequency switching performance. For applications with frequency-sensitive requirements, circuit simulation or testing is appropriate to confirm performance.