CDBUR0230R Equivalent & Substitute Parts

Part Overview

The CDBUR0230R is a Schottky rectifier diode manufactured by Comchip Technology, designed for surface mount applications in the 0603/SOD-523F package. This component operates at 30V DC reverse voltage with a 200mA average rectified current rating and a forward voltage of 600mV at 200mA. The device is classified as a small signal Schottky diode and maintains an active product status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Equivalent and substitute parts are identified to address component availability, supply chain continuity, or specific application requirements while maintaining electrical and mechanical compatibility within defined parameter tolerances.

Substiute Parts

CDBUR0230R

Comchip TechnologyIn Stock: 1207CDBUR0230R Datasheet

Current PartRFQ

RB751S40T5G

onsemiIn Stock: 1982RB751S40T5G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDBUR0230R is determined by the following critical electrical and mechanical parameters:

Mandatory Matching Criteria:

• Voltage - DC Reverse (Vr) (Max): 30V minimum
• Package / Case: SOD-523 or equivalent 2-SMD, No Lead form factor
• Technology: Schottky rectifier diode classification
• Mounting Type: Surface Mount

Allowable Parameter Variation:

• Current - Average Rectified (Io): Substitute must equal or exceed 200mA rating
• Voltage - Forward (Vf): Substitute forward voltage must not exceed the application circuit tolerance
• Operating Temperature Range: Substitute must cover or exceed the -40°C to 125°C junction temperature range
• Compliance: RoHS3 and MSL ratings must be maintained

The RB751S40T5G qualifies as a substitute based on matching reverse voltage (30V), package compatibility (SOD-523), Schottky technology classification, and surface mount configuration. However, the current rating of 30mA is below the 200mA specification of the main part.

Parameter Comparison

Engineering Selection Recommendations

CDBUR0230R Primary Selection: The CDBUR0230R remains the primary component choice when the full 200mA current rating is required. Both the main part and substitute maintain active product status, ROHS3 compliance, and unlimited moisture sensitivity rating (MSL 1), ensuring long-term availability and regulatory alignment.

RB751S40T5G Substitution Constraints: The RB751S40T5G (onsemi) is electrically compatible for applications requiring 30V reverse voltage in the SOD-523 package form factor. However, the 30mA current rating is significantly lower than the 200mA specification of the CDBUR0230R. This substitute is suitable only for circuits designed to operate within the 30mA maximum current envelope.

Compliance and Certification: Both components maintain identical RoHS3 compliance status and MSL 1 (unlimited) moisture sensitivity ratings. The RB751S40T5G provides an extended operating temperature range (-55°C to 150°C) compared to the CDBUR0230R (-40°C to 125°C), offering additional thermal margin in applications requiring lower temperature operation.

Frequently Asked Questions (FAQ)

Q: Can the RB751S40T5G replace the CDBUR0230R in all applications?

A: No. The RB751S40T5G has a maximum average rectified current of 30mA, while the CDBUR0230R is rated for 200mA. Substitution is valid only for circuits designed to operate within the 30mA current limit. Exceeding this rating will cause device failure.

Q: Are the packages physically compatible?

A: Both components use the SOD-523 package form factor (2-SMD, No Lead configuration). The CDBUR0230R is specified as 0603/SOD-523F, and the RB751S40T5G is specified as SOD-523. Physical footprint compatibility is confirmed for surface mount assembly.

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

A: The CDBUR0230R specifies 600mV forward voltage at 200mA, while the RB751S40T5G specifies 370mV at 1mA. These measurements are taken at different current levels and cannot be directly compared. Forward voltage characteristics must be evaluated at the actual operating current of the application circuit.

Q: Do both parts meet RoHS3 requirements?

A: Yes. Both the CDBUR0230R and RB751S40T5G are ROHS3 compliant with MSL 1 (unlimited) moisture sensitivity ratings, ensuring regulatory compliance and long-term storage capability without moisture bake-out requirements.

Q: Which part has better reverse leakage performance?

A: The RB751S40T5G exhibits lower reverse leakage current (500nA @ 30V) compared to the CDBUR0230R (1µA @ 10V). However, these measurements are taken at different voltage and temperature conditions and must be evaluated within the specific application context.

Q: What is the temperature operating range difference?

A: The CDBUR0230R operates from -40°C to 125°C junction temperature, while the RB751S40T5G operates from -55°C to 150°C. The RB751S40T5G provides extended low-temperature capability, which may be beneficial for applications in extreme thermal environments.