CDBD650-G Equivalent & Substitute Parts

Part Overview

The CDBD650-G is a Schottky rectifier diode manufactured by Comchip Technology, rated for 50V DC reverse voltage and 6A average rectified current in a surface mount DPAK package. This component is classified as obsolete, making identification of functionally equivalent substitute parts necessary for ongoing design support and procurement continuity. The part operates across a junction temperature range of -55°C to 150°C and features fast recovery characteristics suitable for high-frequency rectification applications.

Substiute Parts

CDBD650-G

Comchip TechnologyIn Stock: 813CDBD650-G Datasheet

Current PartRFQ

STPS1045B-TR

STMicroelectronicsIn Stock: 5512STPS1045B-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDBD650-G is determined by the following critical parameters:

Package Compatibility: Both the main part and substitute must use the TO-252-3 DPAK surface mount package to ensure mechanical and electrical compatibility with existing PCB layouts.

Technology Class: Schottky diode technology is maintained across all substitutes to preserve fast recovery characteristics and forward voltage performance.

Voltage Rating: The substitute part voltage rating must equal or exceed the original 50V DC reverse voltage specification to ensure safe operation under maximum reverse bias conditions.

Current Rating: The substitute part current rating must equal or exceed the original 6A average rectified current specification to handle the intended load without thermal stress.

Speed Characteristics: Fast recovery performance (≤ 500ns, > 200mA) is required to maintain switching performance in rectification circuits.

Temperature Range: Operating junction temperature capability must support the application's thermal environment.

The STPS1045B-TR from STMicroelectronics meets these substitution criteria with equivalent package, technology, and performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The CDBD650-G is classified as obsolete, while the STPS1045B-TR is active production. The substitute part ensures long-term availability and supply chain continuity.

Compliance and Certifications: The STPS1045B-TR carries RoHS3 compliance and REACH unaffected status, meeting modern regulatory requirements. Both parts share identical ECCN (EAR99) and HTSUS (8541.10.0080) classifications.

Voltage Rating Constraint: The STPS1045B-TR is rated for 45V maximum reverse voltage compared to the CDBD650-G's 50V rating. Selection of this substitute requires verification that the circuit's maximum reverse bias voltage does not exceed 45V. If the application requires 50V reverse voltage capability, this substitute is not suitable.

Current and Thermal Performance: The STPS1045B-TR's 10A current rating exceeds the original 6A specification, providing design margin. The higher maximum junction temperature (175°C vs. 150°C) offers improved thermal headroom.

Electrical Performance: The substitute exhibits superior electrical characteristics with lower forward voltage (630 mV @ 10A vs. 750 mV @ 6A) and reduced reverse leakage current (100 µA @ 45V vs. 500 µA @ 50V).

Frequently Asked Questions (FAQ)

Q: Can the STPS1045B-TR directly replace the CDBD650-G in all applications?

A: Direct replacement is possible only if the circuit's maximum reverse bias voltage does not exceed 45V. The STPS1045B-TR is rated for 45V maximum reverse voltage, while the CDBD650-G is rated for 50V. Verify your circuit design specifications before substitution.

Q: Are the packages physically identical?

A: Yes. Both parts use the TO-252-3 DPAK package with 2 leads plus tab (SC-63). Pin configuration and PCB footprint are identical, allowing direct board-level substitution without layout modifications.

Q: What are the advantages of using the STPS1045B-TR substitute?

A: The substitute offers higher current capacity (10A vs. 6A), lower forward voltage drop (630 mV vs. 750 mV), reduced reverse leakage current (100 µA vs. 500 µA), higher maximum junction temperature (175°C vs. 150°C), active production status, and modern regulatory compliance (RoHS3, REACH).

Q: Does the lower forward voltage of the substitute affect circuit operation?

A: Lower forward voltage is generally beneficial, reducing power dissipation and heat generation. However, if the circuit design relies on specific forward voltage characteristics for biasing or reference purposes, this difference should be evaluated in the application context.

Q: Is the substitute suitable for high-frequency switching applications?

A: Yes. Both parts feature identical fast recovery characteristics (≤ 500ns, > 200mA), making the substitute suitable for high-frequency rectification and switching applications.

Q: What is the moisture sensitivity level for both parts?

A: Both the CDBD650-G and STPS1045B-TR carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions for storage or handling.