CDBQR40-HF Schottky Diode Equivalent & Substitute Parts

Part Overview

The CDBQR40-HF is a Schottky rectifier diode manufactured by Comchip Technology, rated for 30 V DC reverse voltage and 200 mA average rectified current in a 0402 surface mount package. This component is classified as Last Time Buy, indicating discontinued production with limited inventory availability. Identifying equivalent and substitute parts is necessary to ensure design continuity and supply chain reliability for applications requiring Schottky diode functionality in compact form factors.

Substiute Parts

CDBQR40-HF

Comchip TechnologyIn Stock: 2270893CDBQR40-HF Datasheet

Current PartRFQ

CDBQC40-HF

Comchip TechnologyIn Stock: 1073CDBQC40-HF Datasheet

MFR RecommendedRFQ

CDBQR0230R

Comchip TechnologyIn Stock: 5244CDBQR0230R Datasheet

Parametric EquivalentRFQ

CDBQR0230R-HF

Comchip TechnologyIn Stock: 2211CDBQR0230R-HF Datasheet

Parametric EquivalentRFQ

PMEG4002ELD,315

Nexperia USA Inc.In Stock: 34332PMEG4002ELD,315 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDBQR40-HF is determined by the following critical parameters:

Electrical Compatibility Criteria:

• Voltage - DC Reverse (Vr) (Max): Substitute parts must equal or exceed 30 V
• Current - Average Rectified (Io): Substitute parts must equal or exceed 200 mA
• Voltage - Forward (Vf) (Max) @ If: Substitute parts must not exceed the specified forward voltage at rated current
• Current - Reverse Leakage @ Vr: Substitute parts must not exceed specified leakage current

Mechanical Compatibility Criteria:

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

Compliance Criteria:

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

Substitute parts are grouped into two categories: parametric equivalents (identical electrical specifications with different packaging or product status) and manufacturer-recommended alternatives (enhanced specifications within compatible package constraints).

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Parametric Equivalents):

CDBQR0230R and CDBQR0230R-HF are parametric equivalents to CDBQR40-HF, sharing identical electrical specifications (30 V reverse voltage, 200 mA current, 600 mV forward voltage at 200 mA). Both are available in the same 0402 package footprint. CDBQR0230R is classified as Active product status with 5,200 pieces in inventory, providing superior supply chain continuity compared to the Last Time Buy status of CDBQR40-HF. CDBQR0230R-HF maintains Last Time Buy status but offers 2,141 pieces in stock. Both parts are ROHS3 compliant with MSL 1 rating.

For Enhanced Voltage Rating (Manufacturer-Recommended Alternative):

CDBQC40-HF is a manufacturer-recommended substitute offering 40 V reverse voltage rating while maintaining 200 mA current capacity and identical 0402 package footprint. This part is Active status with ROHS3 compliance. The forward voltage specification differs (1 V @ 40 mA versus 600 mV @ 200 mA), requiring circuit-level verification for applications sensitive to forward voltage characteristics. Inventory availability is limited at 1,014 pieces.

For Cross-Manufacturer Substitution (Automotive-Grade Alternative):

PMEG4002ELD,315 from Nexperia USA Inc. provides 40 V reverse voltage and 200 mA current in a 2-XDFN package (DFN1006D-2). This part is Active status with AEC-Q100 automotive qualification and higher maximum junction temperature (150°C). The package footprint differs from the 0402 standard, requiring PCB layout modification. Forward voltage matches the main part specification (600 mV @ 200 mA). Inventory availability is highest at 34,272 pieces. This option is suitable for applications requiring automotive-grade components with enhanced thermal performance.

Frequently Asked Questions (FAQ)

Q: Can CDBQC40-HF be used as a direct replacement for CDBQR40-HF?

A: CDBQC40-HF is electrically compatible for applications where 30 V reverse voltage is required, as it is rated for 40 V. Both parts share the same 0402 package footprint and 200 mA current rating. However, the forward voltage specification differs (1 V @ 40 mA for CDBQC40-HF versus 600 mV @ 200 mA for CDBQR40-HF). Circuit verification is required for designs sensitive to forward voltage drop.

Q: What is the difference between CDBQR0230R and CDBQR0230R-HF?

A: Both parts are parametric equivalents with identical electrical specifications (30 V, 200 mA, 600 mV forward voltage). The primary difference is packaging format: CDBQR0230R is supplied in Tape & Reel (TR) format with 5,200 pieces in inventory and Active product status, while CDBQR0230R-HF is supplied in Cut Tape (CT) format with 2,141 pieces in inventory and Last Time Buy status. Selection depends on procurement requirements and supply chain strategy.

Q: Is PMEG4002ELD,315 compatible with existing PCB layouts designed for CDBQR40-HF?

A: PMEG4002ELD,315 uses a different package (2-XDFN / DFN1006D-2) compared to the 0402 footprint of CDBQR40-HF. PCB layout modification is required for this substitution. The part is suitable for new designs or redesigns where automotive-grade qualification and enhanced thermal performance (150°C maximum junction temperature) are required.

Q: What are the key parameters that determine substitution compatibility?

A: Substitution compatibility is determined by: (1) Voltage - DC Reverse (Vr) rating equal to or exceeding 30 V, (2) Current - Average Rectified (Io) equal to or exceeding 200 mA, (3) Forward voltage characteristics suitable for the application circuit, (4) Package footprint compatibility (0402 for direct PCB replacement), and (5) Compliance certifications (ROHS3, MSL 1).

Q: Why is CDBQR40-HF classified as Last Time Buy?

A: Last Time Buy status indicates that Comchip Technology has discontinued production of this part number. Existing inventory of 2,270,864 pieces is available, but no future production is planned. For long-term supply chain reliability, migration to Active status alternatives such as CDBQR0230R is recommended.

Q: Can I use a 40 V rated diode in a 30 V application?

A: Yes. A 40 V rated diode (such as CDBQC40-HF or PMEG4002ELD,315) can be used in a 30 V application, as the higher voltage rating provides additional safety margin. The diode will operate within its rated specifications. However, other electrical parameters such as forward voltage and reverse leakage current must be verified for circuit compatibility.