CDBU42-HF Schottky Diode Equivalent & Substitute Parts

Part Overview

The CDBU42-HF is an active Schottky rectifier diode manufactured by Comchip Technology, designed for surface mount applications in the 0603/SOD-523F package. This component operates at 30 V DC reverse voltage with 200 mA average rectified current, making it suitable for low-voltage power conversion and signal protection circuits. The part is ROHS3 compliant with MSL 1 rating, indicating unlimited moisture sensitivity protection. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across the specified parameter range.

Substiute Parts

CDBU42-HF

Comchip TechnologyIn Stock: 972CDBU42-HF Datasheet

Current PartRFQ

CDBUR54

Comchip TechnologyIn Stock: 1038CDBUR54 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CDBU42-HF is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Technology: Schottky
• Voltage - DC Reverse (Vr) (Max): 30 V
• Current - Average Rectified (Io): 200 mA
• Package / Case: 2-SMD, No Lead
• Supplier Device Package: 0603/SOD-523F
• Operating Temperature - Junction (Max): 125°C
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Allowable Parameter Variation: Substitute parts may exhibit differences in forward voltage (Vf) at different measurement currents, reverse leakage current (Ir), and capacitance values, provided the primary electrical ratings and physical package remain identical. These secondary parameters do not affect functional interchangeability in standard applications.

Parameter Comparison

Engineering Selection Recommendations

Both CDBU42-HF and CDBUR54 are active products from Comchip Technology with identical ROHS3 compliance and MSL 1 ratings. Selection between these parts is based on availability and inventory status. The CDBU42-HF maintains 952 pieces in stock, while CDBUR54 maintains 1000 pieces in stock. Both parts meet the same regulatory requirements (REACH Unaffected, ECCN EAR99, HTSUS 8541.10.0070) and are suitable for direct substitution in surface mount applications requiring 30 V / 200 mA Schottky rectification in the 0603/SOD-523F package form factor.

Frequently Asked Questions (FAQ)

Q: Can CDBUR54 be used as a direct replacement for CDBU42-HF?

A: Yes. Both parts share identical voltage ratings (30 V), current ratings (200 mA), package type (0603/SOD-523F), and compliance certifications (ROHS3, MSL 1). The parts are electrically and mechanically interchangeable.

Q: What is the difference in forward voltage specification between these parts?

A: CDBU42-HF specifies forward voltage at 200 mA, while CDBUR54 specifies forward voltage at 100 mA. Both maintain 1 V maximum forward voltage at their respective measurement currents. This difference does not affect functional compatibility.

Q: Are there differences in reverse leakage current?

A: CDBU42-HF specifies 500 nA reverse leakage at 25 V, while CDBUR54 specifies 2 µA at 25 V. Both values are within acceptable ranges for Schottky diode applications and do not prevent substitution.

Q: Do both parts have the same package dimensions?

A: Yes. Both CDBU42-HF and CDBUR54 use the 0603/SOD-523F surface mount package with 2-SMD, No Lead configuration. PCB footprints and reflow profiles are identical.

Q: What compliance certifications apply to both parts?

A: Both parts are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with HTSUS code 8541.10.0070. Both carry MSL 1 (unlimited) moisture sensitivity rating.