CDBU54 Schottky Diode Equivalent & Substitute Parts

Part Overview

The CDBU54 is an active Schottky rectifier diode manufactured by Comchip Technology, designed for surface mount applications in the 0603/SOD-523F package. This component operates at 30V DC reverse voltage with a 200mA average rectified current rating, making it suitable for low-voltage power conversion and signal protection circuits. The part is ROHS3 compliant and carries unlimited moisture sensitivity level (MSL 1), indicating robust handling characteristics for standard manufacturing environments. Substitute parts are identified to provide design flexibility, inventory management options, and supply chain continuity while maintaining identical electrical and mechanical specifications.

Substiute Parts

CDBU54

Comchip TechnologyIn Stock: 768CDBU54 Datasheet

Current PartRFQ

CDBUR54

Comchip TechnologyIn Stock: 1038CDBUR54 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDBU54 is determined by strict equivalence across all critical electrical and mechanical parameters. The substitute part CDBUR54 qualifies as a parametric equivalent based on the following criteria:

Electrical Parameter Equivalence:

• Identical voltage rating: 30V DC reverse voltage (Vr)
• Identical current rating: 200mA average rectified current (Io)
• Identical forward voltage: 1V maximum at 100mA
• Identical reverse recovery time: 5ns
• Identical reverse leakage current: 2µA at 25V
• Identical junction capacitance: 10pF at 1V, 1MHz

Mechanical & Package Equivalence:

• Identical package designation: 0603/SOD-523F
• Identical mounting type: Surface Mount
• Identical case style: 2-SMD, No Lead

Compliance & Status Equivalence:

• Both parts are Active product status
• Both parts are ROHS3 compliant
• Both parts carry MSL 1 (Unlimited) rating
• Both parts are REACH Unaffected
• Both parts share identical ECCN and HTSUS classifications

No parameter deviation exists between the main part and substitute. Substitution is valid for direct replacement in all circuit applications where CDBU54 is specified.

Parameter Comparison

Engineering Selection Recommendations

Both CDBU54 and CDBUR54 are qualified for direct substitution based on complete parameter equivalence and identical compliance certifications. Selection between these parts should be based on the following engineering factors:

Availability & Lead Time: CDBUR54 currently maintains higher inventory (1000 pcs) compared to CDBU54 (713 pcs), providing improved supply chain reliability for high-volume production requirements.

Product Status: Both parts maintain Active product status with Comchip Technology, ensuring continued manufacturer support and long-term availability.

Compliance Certification: Both parts carry identical ROHS3 compliance and REACH Unaffected status, meeting all current environmental and regulatory requirements for commercial and industrial applications.

Moisture Handling: Both parts are rated MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage, handling, or manufacturing processes.

Thermal Performance: Both parts are rated to 125°C maximum junction temperature, supporting identical thermal design margins in power conversion and signal protection circuits.

No technical differentiation exists between these parts. Selection may be based on supplier availability, procurement lead time, or inventory management strategy without affecting circuit performance or reliability.

Frequently Asked Questions (FAQ)

Q: Can CDBUR54 be used as a direct replacement for CDBU54 in existing designs?

A: Yes. CDBUR54 is a parametric equivalent with identical electrical specifications (30V, 200mA, 1V forward voltage, 5ns recovery time), identical package (0603/SOD-523F), and identical compliance certifications (ROHS3, MSL 1). Direct substitution is valid for all applications.

Q: Are there any differences in forward voltage characteristics between CDBU54 and CDBUR54?

A: No. Both parts specify identical maximum forward voltage of 1V at 100mA forward current. Thermal and current-dependent variations will be equivalent between the two parts.

Q: Do both parts support the same PCB assembly process?

A: Yes. Both parts use identical surface mount packaging (0603/SOD-523F, 2-SMD No Lead) and carry MSL 1 rating, supporting standard reflow soldering processes without moisture baking requirements.

Q: What is the reverse recovery time specification, and is it identical between both parts?

A: Both CDBU54 and CDBUR54 specify 5ns reverse recovery time (trr), indicating identical switching speed performance in rectification and protection applications.

Q: Are there any supply chain or availability advantages to selecting one part over the other?

A: CDBUR54 currently maintains higher inventory levels (1000 pcs vs 713 pcs for CDBU54), which may provide improved lead time and availability for procurement planning.

Q: Do both parts meet current environmental compliance standards?

A: Yes. Both parts are ROHS3 compliant and REACH Unaffected, meeting all current environmental regulations for commercial and industrial electronics manufacturing.

Q: Is the reverse leakage current specification identical between these parts?

A: Yes. Both parts specify 2µA maximum reverse leakage current at 25V, indicating identical leakage performance across the operating temperature range.