CDBUR001A Schottky Diode Equivalent & Substitute Parts

Part Overview

The CDBUR001A is a Schottky rectifier diode manufactured by Comchip Technology, rated for 30V DC reverse voltage with 100mA average rectified current in a surface mount 0603/SOD-523F package. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing design support and procurement continuity. The CDBUR001A remains available in inventory (742 pieces), but obsolete status requires engineers to establish qualified substitutes for future production and new designs.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	30	V
Current - Average Rectified (Io)	100	mA
Voltage - Forward (Vf) (Max) @ If	1	V @ 100 mA
Current - Reverse Leakage @ Vr	2	µA @ 25 V
Capacitance @ Vr, F	6	pF @ 10V, 1MHz
Operating Temperature - Junction (Max)	125	°C
Package / Case	2-SMD, No Lead	0603/SOD-523F
Mounting Type	Surface Mount
Technology	Schottky
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the CDBUR001A is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Criteria:

Voltage - DC Reverse (Vr) (Max): 30V minimum
Package / Case: 2-SMD, No Lead in 0603/SOD-523F form factor
Mounting Type: Surface Mount
Technology: Schottky rectifier diode
Operating Temperature - Junction: 125°C maximum

Allowable Parameter Variance:

Current - Average Rectified (Io): Substitute must equal or exceed 100mA
Voltage - Forward (Vf) (Max): Substitute must not exceed 1V @ 100mA
Current - Reverse Leakage @ Vr: Substitute must not exceed 2µA @ 25V
Capacitance @ Vr, F: Substitute specifications provided for reference

The CDBUR54 qualifies as a direct substitute because it maintains identical voltage rating (30V), identical package geometry (0603/SOD-523F), identical mounting type (Surface Mount), and identical technology (Schottky). The CDBUR54 provides enhanced current capability (200mA vs. 100mA), which is compatible with applications designed for the CDBUR001A.

Parameter Comparison

Parameter	CDBUR001A	CDBUR54	Unit
Manufacturer	Comchip Technology	Comchip Technology
Category	Diodes, Rectifiers	Diodes, Rectifiers
Technology	Schottky	Schottky
Voltage - DC Reverse (Vr) (Max)	30	30	V
Current - Average Rectified (Io)	100	200	mA
Voltage - Forward (Vf) (Max) @ If	1 @ 100 mA	1 @ 100 mA	V
Current - Reverse Leakage @ Vr	2 @ 25 V	2 @ 25 V	µA
Operating Temperature - Junction (Max)	125	125	°C
Package / Case	2-SMD, No Lead	2-SMD, No Lead	0603/SOD-523F
Mounting Type	Surface Mount	Surface Mount
Product Status	Obsolete	Active
RoHS Status	Not specified	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

CDBUR54 as Primary Substitute:

The CDBUR54 is the qualified substitute for the CDBUR001A based on the following engineering factors:

Product Status Alignment: The CDBUR54 maintains active product status, ensuring long-term availability and manufacturing support. The CDBUR001A is obsolete, creating supply chain risk for new designs and production continuity.
Electrical Compatibility: The CDBUR54 maintains identical reverse voltage rating (30V), forward voltage characteristics (1V @ 100mA), and reverse leakage current (2µA @ 25V). The increased current rating (200mA vs. 100mA) provides design margin without introducing incompatibility.
Package and Mounting Equivalence: Both parts use identical 0603/SOD-523F surface mount packages with 2-SMD, No Lead configuration. PCB layout, reflow profiles, and assembly processes require no modification.
Compliance and Certifications: The CDBUR54 is ROHS3 compliant and REACH unaffected, meeting current regulatory requirements. Both parts share MSL 1 (Unlimited) moisture sensitivity classification.
Reverse Recovery Time: The CDBUR54 specifies 5ns reverse recovery time, providing additional performance data for high-frequency switching applications.

Frequently Asked Questions (FAQ)

Q: Can the CDBUR54 directly replace the CDBUR001A in existing designs?

A: Yes. The CDBUR54 maintains identical voltage rating (30V), package geometry (0603/SOD-523F), and forward voltage characteristics (1V @ 100mA). The increased current rating (200mA) is compatible with applications designed for 100mA operation. No circuit modifications are required.

Q: What is the primary difference between CDBUR001A and CDBUR54?

A: The CDBUR54 provides doubled average rectified current capacity (200mA vs. 100mA) while maintaining all other electrical parameters. The CDBUR54 is active product status; the CDBUR001A is obsolete.

Q: Are there package or footprint differences?

A: No. Both parts use identical 2-SMD, No Lead packages in 0603/SOD-523F form factor. PCB footprints are identical, and no layout changes are necessary.

Q: Does the CDBUR54 meet current regulatory requirements?

A: Yes. The CDBUR54 is ROHS3 compliant and REACH unaffected. Both parts have MSL 1 (Unlimited) moisture sensitivity classification.

Q: What is the reverse recovery time specification?

A: The CDBUR54 specifies 5ns reverse recovery time. The CDBUR001A does not provide this specification in the available data.

Q: Can I use CDBUR54 in high-frequency switching applications?

A: The CDBUR54 is classified as Small Signal with recovery time of 5ns, suitable for switching applications within the specified current and voltage ratings.

Q: Is the CDBUR54 available in different packaging options?

A: The CDBUR54 is supplied in Tape & Reel (TR) packaging. The CDBUR001A packaging format is not specified in available data.

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