CDBUR0340 Equivalent & Substitute Parts Reference

Part Overview

The CDBUR0340 is a Schottky rectifier diode manufactured by Comchip Technology, designed for surface mount applications in the 0603/SOD-523F package. This component operates at 40 V DC reverse voltage with 350 mA average rectified current and features fast recovery characteristics with a reverse recovery time of 6.4 ns. The part is Active in product status and ROHS3 compliant, making it suitable for modern electronic applications requiring low-forward-voltage rectification.

Equivalent and substitute parts are identified to support design flexibility, supply chain continuity, and inventory optimization while maintaining identical electrical and mechanical performance specifications.

Substiute Parts

CDBUR0340

Comchip TechnologyIn Stock: 867CDBUR0340 Datasheet

Current PartRFQ

CDBU0340

Comchip TechnologyIn Stock: 18116CDBU0340 Datasheet

Parametric EquivalentRFQ

CDBU0340-HF

Comchip TechnologyIn Stock: 9936CDBU0340-HF Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CDBUR0340 are identified based on strict parametric equivalence across all critical electrical and mechanical specifications. The substitution logic is based on the following key parameters that must remain identical:

• Voltage - DC Reverse (Vr) (Max): 40 V
• Current - Average Rectified (Io): 350 mA
• Voltage - Forward (Vf) (Max) @ If: 600 mV @ 200 mA
• Reverse Recovery Time (trr): 6.4 ns
• Current - Reverse Leakage @ Vr: 5 µA @ 30 V
• Capacitance @ Vr, F: 50 pF @ 0 V, 1 MHz
• Package / Case: 2-SMD, No Lead
• Mounting Type: Surface Mount
• Operating Temperature - Junction (Max): 125°C

All identified substitute parts maintain these specifications without deviation. Packaging variants (0603/SOD-523F versus 0603 (1608 Metric)) represent equivalent physical footprints suitable for direct PCB substitution.

Parameter Comparison

Engineering Selection Recommendations

All three parts—CDBUR0340, CDBU0340, and CDBU0340-HF—are Active products from Comchip Technology with identical electrical specifications and full compliance certifications. Selection between these parts is based on the following factors:

CDBUR0340: Primary part designation with 0603/SOD-523F package specification. Current inventory: 780 Pcs. Suitable for applications requiring this specific package designation.

CDBU0340: Parametric equivalent with 0603 (1608 Metric) package designation. Current inventory: 18,100 Pcs. Higher inventory availability supports supply chain continuity and extended lead-time protection.

CDBU0340-HF: Parametric equivalent with 0603/SOD-523F package specification. Current inventory: 9,898 Pcs. Designated as a variant of CDBU0340 base product. Suitable for applications requiring this specific package designation with higher inventory than CDBUR0340.

All parts maintain ROHS3 compliance, REACH Unaffected status, and MSL 1 (Unlimited) moisture sensitivity rating. Selection should prioritize inventory availability and specific package requirements for the target application.

Frequently Asked Questions (FAQ)

Q: Can CDBU0340 be used as a direct substitute for CDBUR0340 in PCB assembly?

A: CDBU0340 is a parametric equivalent with identical electrical specifications. The package designation difference (0603 (1608 Metric) versus 0603/SOD-523F) represents equivalent physical footprints. Direct PCB substitution is supported for applications where the 0603 metric footprint is acceptable.

Q: What is the difference between CDBU0340 and CDBU0340-HF?

A: Both parts are parametric equivalents with identical electrical specifications. CDBU0340-HF is designated as a variant of the CDBU0340 base product. The "-HF" suffix indicates a specific product line variant. Electrical performance and package footprint (0603/SOD-523F) are identical.

Q: Are all three parts suitable for high-frequency switching applications?

A: All three parts feature identical fast recovery characteristics with a reverse recovery time of 6.4 ns and fast recovery speed classification (≤ 500 ns, > 200 mA). Electrical specifications support high-frequency switching applications within the specified voltage and current ratings.

Q: What is the significance of the package designation difference between 0603/SOD-523F and 0603 (1608 Metric)?

A: Both designations represent equivalent 0603 surface mount packages. The SOD-523F designation is an industry-standard package code. The 1608 Metric designation provides metric dimensions for the same physical footprint. PCB layout compatibility is maintained across both designations.

Q: Which part should be selected for new designs?

A: All three parts are Active products with identical electrical specifications. Selection should be based on inventory availability, specific package designation requirements, and supply chain strategy. CDBU0340 offers the highest current inventory (18,100 Pcs) for supply chain continuity.

Q: Are moisture sensitivity considerations different between these parts?

A: All three parts carry MSL 1 (Unlimited) rating, indicating unlimited shelf life without moisture bake requirements. Moisture sensitivity handling is identical across all substitute parts.

Q: Can these parts be used interchangeably in existing designs?

A: Yes, all three parts maintain identical electrical specifications (40 V reverse voltage, 350 mA average rectified current, 600 mV forward voltage at 200 mA, 6.4 ns reverse recovery time). Interchangeability is supported for applications where the package footprint is compatible with PCB design.