CDBQC70-HF Equivalent & Substitute Parts

Part Overview

The CDBQC70-HF is a Schottky rectifier diode manufactured by Comchip Technology, designed for surface mount applications in the 0402 (1006 Metric) package. This component operates at a maximum reverse voltage of 70 V with an average rectified current of 70 mA, making it suitable for low-voltage power conversion and signal protection circuits. The part is currently in active production status with 1114 units available in inventory. Equivalent and substitute parts are identified to provide design flexibility, supply chain alternatives, and application-specific options such as automotive-grade variants.

Substiute Parts

CDBQC70-HF

Comchip TechnologyIn Stock: 1165CDBQC70-HF Datasheet

Current PartRFQ

ACDBQC70-HF

Comchip TechnologyIn Stock: 4761ACDBQC70-HF Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDBQC70-HF is determined by strict equivalence across the following critical electrical and mechanical parameters:

Electrical Parameters:

• Voltage - DC Reverse (Vr) (Max): 70 V
• Current - Average Rectified (Io): 70 mA
• Voltage - Forward (Vf) (Max) @ If: 1 V @ 15 mA
• Reverse Recovery Time (trr): 5 ns
• Current - Reverse Leakage @ Vr: 100 nA @ 50 V
• Capacitance @ Vr, F: 2 pF @ 1 MHz

Mechanical Parameters:

• Package / Case: 0402 (1006 Metric)
• Supplier Device Package: 0402C/SOD-923F
• Mounting Type: Surface Mount

Compliance Parameters:

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)
• Operating Temperature - Junction: -65°C ~ 125°C

The ACDBQC70-HF meets all electrical and mechanical equivalence criteria. The primary distinction is the automotive-grade qualification (AEC-Q101) and automotive designation, which represents an enhanced variant suitable for automotive applications while maintaining full parametric compatibility with the standard industrial-grade CDBQC70-HF.

Parameter Comparison

Engineering Selection Recommendations

CDBQC70-HF Selection: Select the CDBQC70-HF for standard industrial applications where automotive qualification is not required. This part is active in production with established supply availability and meets all ROHS3 compliance requirements for general-purpose rectification and signal protection circuits.

ACDBQC70-HF Selection: Select the ACDBQC70-HF for automotive applications or systems requiring AEC-Q101 qualification. This variant maintains identical electrical performance and package specifications while providing automotive-grade reliability assurance. The ACDBQC70-HF offers higher inventory availability (4694 units) compared to the standard variant.

Both parts are active products with unlimited moisture sensitivity rating (MSL 1) and operate across the full industrial temperature range of -65°C to 125°C. Selection between these equivalents depends on application requirements and qualification mandates rather than electrical or mechanical performance differences.

Frequently Asked Questions (FAQ)

Q: Can ACDBQC70-HF be used as a direct replacement for CDBQC70-HF?

A: Yes. The ACDBQC70-HF is a parametric equivalent with identical electrical specifications (70 V reverse voltage, 70 mA average rectified current, 1 V forward voltage at 15 mA, 5 ns reverse recovery time) and mechanical package (0402/SOD-923F surface mount). The primary difference is automotive-grade qualification (AEC-Q101), which does not restrict use in standard industrial applications.

Q: What is the significance of the AEC-Q101 qualification on the ACDBQC70-HF?

A: AEC-Q101 is an automotive electronics qualification standard that certifies component reliability under automotive operating conditions, including temperature cycling, vibration, and environmental stress. The ACDBQC70-HF meets this qualification, making it suitable for automotive applications where such certification is mandated. Standard industrial applications do not require this qualification.

Q: Are there any differences in the capacitance specifications between CDBQC70-HF and ACDBQC70-HF?

A: Both parts specify 2 pF capacitance at 1 MHz. The CDBQC70-HF measurement is taken at 0 V, while the ACDBQC70-HF measurement is taken at 1 V. This minor measurement condition difference does not affect functional equivalence in typical circuit applications.

Q: Can these parts be used interchangeably on the same PCB assembly?

A: Yes. Both parts use identical 0402 (1006 Metric) surface mount packages with SOD-923F supplier device package designation. They are mechanically and electrically interchangeable on PCB layouts designed for either variant.

Q: What is the moisture sensitivity level (MSL) for these diodes?

A: Both CDBQC70-HF and ACDBQC70-HF carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions. These parts do not require special moisture control during storage, handling, or assembly.

Q: Are both parts RoHS compliant?

A: Yes. Both CDBQC70-HF and ACDBQC70-HF are ROHS3 compliant, meeting current environmental and hazardous substance restrictions for electronic components.

Q: What is the operating temperature range for these diodes?

A: Both parts operate across a junction temperature range of -65°C to 125°C, suitable for industrial and automotive temperature environments.