CDBQC40-HF Equivalent & Substitute Parts

Part Overview

The CDBQC40-HF is a Schottky rectifier diode manufactured by Comchip Technology, designed for surface mount applications in 0402 (1006 Metric) package format. This component operates at 40 V DC reverse voltage with 200 mA average rectified current capability. The part is classified as Active product status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across the specified parameter set. Alternative sources and variants may be required due to inventory availability, supply chain considerations, or application-specific qualification requirements such as automotive-grade certifications.

Substiute Parts

CDBQC40-HF

Comchip TechnologyIn Stock: 1073CDBQC40-HF Datasheet

Current PartRFQ

ACDBQC40-HF

Comchip TechnologyIn Stock: 4894ACDBQC40-HF Datasheet

Parametric EquivalentRFQ

BAS40LP-7

Diodes IncorporatedIn Stock: 155433BAS40LP-7 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CDBQC40-HF is determined by strict equivalence across the following critical parameters:

Mandatory Electrical Equivalence:

• Voltage - DC Reverse (Vr) (Max): 40 V
• Current - Average Rectified (Io): 200 mA
• Voltage - Forward (Vf) (Max) @ If: 1 V @ 40 mA
• Reverse Recovery Time (trr): 5 ns
• Current - Reverse Leakage @ Vr: 200 nA @ 30 V

Mandatory Mechanical Compatibility:

• Mounting Type: Surface Mount
• Package / Case: 0402 (1006 Metric)
• Operating Temperature - Junction: -55°C ~ 125°C

Compliance Requirements:

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

Parts meeting all electrical and mechanical parameters are classified as parametric equivalents. Variations in secondary parameters such as capacitance or automotive-grade qualifications do not disqualify substitution when core electrical and mechanical specifications are maintained.

Parameter Comparison

Engineering Selection Recommendations

ACDBQC40-HF (Comchip Technology): This part is a parametric equivalent to the CDBQC40-HF with identical electrical specifications and package format. The ACDBQC40-HF carries AEC-Q101 automotive qualification, making it suitable for applications requiring automotive-grade component certification. Both parts are manufactured by Comchip Technology and maintain the same supplier device package designation (0402C/SOD-923F). Selection of ACDBQC40-HF is appropriate when automotive compliance is a design requirement or when higher inventory availability (4793 pcs) is advantageous.

BAS40LP-7 (Diodes Incorporated): This part meets all mandatory electrical and mechanical substitution criteria. The BAS40LP-7 is manufactured by Diodes Incorporated and uses an alternative supplier device package designation (X1-DFN1006-2) while maintaining the same 0402 (1006 Metric) case format. The capacitance specification differs (2.3 pF versus 5 pF), which does not affect substitution eligibility as this parameter is not listed as a mandatory equivalence criterion. The BAS40LP-7 offers significantly higher inventory availability (155400 pcs) and is classified as Active product status with full ROHS3 compliance and MSL 1 rating.

Selection between CDBQC40-HF and BAS40LP-7 depends on supply chain requirements, inventory needs, and whether alternative supplier device packaging is acceptable within the design constraints.

Frequently Asked Questions (FAQ)

Q: Can ACDBQC40-HF be used as a direct replacement for CDBQC40-HF?

A: Yes. The ACDBQC40-HF is a parametric equivalent with identical electrical specifications (40 V reverse voltage, 200 mA current, 1 V forward voltage, 5 ns recovery time, 200 nA leakage current) and mechanical compatibility (0402 package, surface mount, -55°C to 125°C operating range). Both parts are ROHS3 compliant with MSL 1 rating. The primary difference is the addition of AEC-Q101 automotive qualification on the ACDBQC40-HF.

Q: Can BAS40LP-7 be used as a direct replacement for CDBQC40-HF?

A: Yes. The BAS40LP-7 meets all mandatory electrical and mechanical substitution criteria. It maintains identical voltage (40 V), current (200 mA), forward voltage (1 V @ 40 mA), recovery time (5 ns), and leakage current (200 nA @ 30 V) specifications. Both parts use 0402 (1006 Metric) surface mount packages with -55°C to 125°C operating temperature ranges and ROHS3 compliance. The supplier device package designation differs (X1-DFN1006-2 versus 0402C/SOD-923F), but both are physically compatible with 0402 footprints.

Q: What is the significance of the capacitance difference between CDBQC40-HF (5 pF) and BAS40LP-7 (2.3 pF)?

A: Capacitance is a secondary parameter not included in the mandatory equivalence criteria for this substitution analysis. Both values are measured at 0 V and 1 MHz. The lower capacitance of BAS40LP-7 may provide advantages in high-frequency switching applications by reducing parasitic effects, but this does not disqualify it as a substitute when core electrical performance parameters are maintained.

Q: Are there package compatibility concerns when substituting between CDBQC40-HF and BAS40LP-7?

A: Both parts use the 0402 (1006 Metric) package format and are surface mount devices. The supplier device package designations differ (0402C/SOD-923F versus X1-DFN1006-2), but both are physically compatible with standard 0402 PCB footprints. No package rework or layout modifications are required for substitution.

Q: What is the difference between CDBQC40-HF and ACDBQC40-HF beyond automotive qualification?

A: The parts are electrically and mechanically identical. The ACDBQC40-HF includes AEC-Q101 automotive qualification, which certifies the component for automotive applications. This qualification involves additional testing and quality assurance procedures. Both parts are manufactured by Comchip Technology, use the same package (0402C/SOD-923F), and carry identical electrical specifications.

Q: Which substitute part should be selected for highest inventory availability?

A: BAS40LP-7 (Diodes Incorporated) offers the highest inventory availability at 155400 pcs. ACDBQC40-HF (Comchip Technology) provides 4793 pcs, while CDBQC40-HF has 1014 pcs in stock. Selection based on inventory should be balanced against supplier preference, lead time requirements, and any design-specific qualifications.

Q: Are all three parts ROHS3 compliant?

A: Yes. CDBQC40-HF, ACDBQC40-HF, and BAS40LP-7 are all ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. All parts meet environmental and regulatory requirements for lead-free manufacturing and hazardous substance restrictions.