CDBUR40 Equivalent & Substitute Parts Reference

Part Overview

The CDBUR40 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 200 mA average rectified current, suitable for low-voltage power conversion and signal protection circuits. The part is Active in product status with full RoHS3 compliance and unlimited moisture sensitivity rating. Equivalent and substitute parts are identified based on matching electrical specifications and mechanical compatibility within the Schottky diode category.

Substiute Parts

CDBUR40

Comchip TechnologyIn Stock: 846CDBUR40 Datasheet

Current PartRFQ

CDBU40

Comchip TechnologyIn Stock: 3415CDBU40 Datasheet

Parametric EquivalentRFQ

CDBU40-HF

Comchip TechnologyIn Stock: 801CDBU40-HF Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CDBUR40 is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

• 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
• Capacitance @ Vr, F: 5 pF @ 0V, 1MHz

Mechanical Equivalence Criteria:

• Package / Case: 2-SMD, No Lead
• Supplier Device Package: 0603/SOD-523F
• Mounting Type: Surface Mount

Compliance Equivalence Criteria:

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

All identified substitute parts match these parameters without deviation. Substitution is valid for direct replacement in circuit designs where CDBUR40 specifications are required.

Parameter Comparison

Engineering Selection Recommendations

CDBU40 is a parametric equivalent to CDBUR40 with identical electrical and mechanical specifications. Both parts are Active in product status, ROHS3 compliant, and carry REACH Unaffected designation. CDBU40 offers higher inventory availability (3400 units) compared to CDBUR40 (824 units), making it suitable for high-volume production requirements while maintaining full specification equivalence.

CDBU40-HF is a parametric equivalent variant of CDBU40 with identical electrical and mechanical specifications to CDBUR40. The "-HF" designation indicates a high-frequency variant within the same electrical parameter set. CDBU40-HF maintains Active product status, ROHS3 compliance, and REACH Unaffected status. This part is suitable for direct substitution where the high-frequency variant designation is acceptable within the application context.

All three parts share identical compliance certifications (RoHS3, REACH Unaffected, EAR99 ECCN classification) and moisture sensitivity ratings (MSL 1 - Unlimited), ensuring regulatory and environmental compatibility across substitution scenarios.

Frequently Asked Questions (FAQ)

Q: Can CDBU40 be used as a direct replacement for CDBUR40?

A: Yes. CDBU40 is a parametric equivalent with identical electrical specifications (40 V reverse voltage, 200 mA average rectified current, 1 V forward voltage at 40 mA, 5 ns reverse recovery time) and mechanical specifications (0603/SOD-523F package, surface mount). Both parts are Active, ROHS3 compliant, and carry identical compliance designations.

Q: What is the difference between CDBU40 and CDBU40-HF?

A: CDBU40 and CDBU40-HF share identical electrical and mechanical parameters. The "-HF" designation indicates a high-frequency variant classification. Both parts meet the same voltage, current, and package specifications and are interchangeable from an electrical standpoint.

Q: Are all three parts (CDBUR40, CDBU40, CDBU40-HF) pin-compatible?

A: Yes. All three parts use the 2-SMD, No Lead package configuration in the 0603/SOD-523F form factor. Pin compatibility is confirmed across all three part numbers.

Q: Which part should be selected for new designs?

A: Selection should be based on availability and application requirements. CDBU40 offers the highest inventory (3400 units), making it suitable for production designs. CDBUR40 and CDBU40-HF are available in lower quantities (824 and 722 units respectively). All three parts are Active and suitable for new designs.

Q: Do these parts have different RoHS or REACH compliance?

A: No. All three parts carry identical compliance status: ROHS3 Compliant, REACH Unaffected, EAR99 ECCN classification, and MSL 1 (Unlimited) moisture sensitivity rating.

Q: Can CDBU40-HF be substituted in applications originally designed for CDBUR40?

A: Yes. CDBU40-HF meets all electrical and mechanical specifications of CDBUR40. The high-frequency variant designation does not restrict substitution in standard Schottky diode applications operating within the specified 40 V, 200 mA parameters.

Q: What are the critical parameters that determine substitution eligibility?

A: Substitution eligibility is determined by matching: Voltage - DC Reverse (40 V), Current - Average Rectified (200 mA), Voltage - Forward (1 V @ 40 mA), Reverse Recovery Time (5 ns), Current - Reverse Leakage (200 nA @ 30 V), Capacitance (5 pF @ 0V, 1MHz), Package (0603/SOD-523F), and Mounting Type (Surface Mount). All three parts match these parameters exactly.