CDBD8100-G Schottky Diode Equivalent & Substitute Parts

Part Overview

The CDBD8100-G is a Schottky rectifier diode manufactured by Comchip Technology, rated for 100V DC reverse voltage and 8A average rectified current in a surface mount TO-263 (D2PAK) package. This component is classified as obsolete, making identification of active equivalent parts essential for ongoing production and maintenance applications. Schottky diodes in this voltage and current class are widely used in power supply circuits, DC-DC converters, and reverse polarity protection applications where fast recovery characteristics and low forward voltage drop are required.

Substiute Parts

CDBD8100-G

Comchip TechnologyIn Stock: 1067CDBD8100-G Datasheet

Current PartRFQ

STPS8H100G-TR

STMicroelectronicsIn Stock: 7061STPS8H100G-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDBD8100-G is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Voltage - DC Reverse (Vr) (Max): 100V
• Current - Average Rectified (Io): 8A
• Package / Case: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
• Mounting Type: Surface Mount
• Technology: Schottky

Acceptable Variation Parameters:

• Voltage - Forward (Vf) (Max) @ If: May be lower than the original specification (improved performance)
• Current - Reverse Leakage @ Vr: May be lower than the original specification (improved performance)
• Operating Temperature - Junction (Max): May be higher than the original specification (extended operating range)
• Product Status: Active status preferred for ongoing availability

The STPS8H100G-TR from STMicroelectronics meets all mandatory matching parameters and demonstrates improved electrical characteristics in forward voltage drop and reverse leakage current, while maintaining full compatibility with the original CDBD8100-G footprint and electrical ratings.

Parameter Comparison

Engineering Selection Recommendations

The STPS8H100G-TR is a direct functional equivalent to the CDBD8100-G for all applications requiring a 100V, 8A Schottky rectifier diode in D2PAK surface mount packaging.

Selection Basis:

1. Product Status: The CDBD8100-G is classified as obsolete. The STPS8H100G-TR maintains active product status with STMicroelectronics, ensuring long-term availability and supply chain continuity.

2. Electrical Equivalence: Both devices share identical voltage and current ratings (100V reverse, 8A average rectified current) and identical fast recovery speed characteristics. The STPS8H100G-TR demonstrates improved electrical performance with lower forward voltage drop (710 mV vs. 850 mV @ 8A) and significantly lower reverse leakage current (4.5 µA vs. 5 mA @ 100V).

3. Package Compatibility: Both parts use the TO-263-3 D2PAK package with identical pinout and thermal characteristics, enabling direct PCB footprint compatibility without layout modifications.

4. Compliance: The STPS8H100G-TR carries ROHS3 compliance certification and maintains REACH unaffected status, meeting current regulatory requirements for electronic component procurement.

5. Operating Temperature: The STPS8H100G-TR supports a maximum junction temperature of 175°C, providing extended thermal operating range compared to the CDBD8100-G specification of 150°C maximum.

Frequently Asked Questions (FAQ)

Q: Can the STPS8H100G-TR be used as a direct replacement for the CDBD8100-G without PCB modifications?

A: Yes. Both devices use identical TO-263-3 D2PAK packaging with the same pinout and thermal tab configuration. No PCB layout changes are required for substitution.

Q: What is the significance of the lower forward voltage drop in the STPS8H100G-TR?

A: The STPS8H100G-TR exhibits 710 mV forward voltage drop at 8A compared to 850 mV for the CDBD8100-G. This 140 mV reduction results in lower power dissipation and improved circuit efficiency, particularly in high-current applications.

Q: Are there any thermal considerations when substituting these parts?

A: The STPS8H100G-TR supports a maximum junction temperature of 175°C versus 150°C for the CDBD8100-G. Both devices use the same D2PAK package with identical thermal characteristics. The higher maximum junction temperature of the STPS8H100G-TR provides additional thermal margin in applications operating near temperature limits.

Q: Does the STPS8H100G-TR meet current regulatory requirements?

A: Yes. The STPS8H100G-TR is ROHS3 compliant and maintains REACH unaffected status, meeting current electronic component procurement regulations. The CDBD8100-G regulatory status is not fully specified in available documentation.

Q: What is the difference between the reverse leakage current specifications?

A: The CDBD8100-G specifies 5 mA reverse leakage at 100V, while the STPS8H100G-TR specifies 4.5 µA at 100V. This represents a significant improvement in leakage characteristics, reducing standby power consumption and improving circuit performance in applications sensitive to reverse leakage.

Q: Are both devices available in the same packaging options?

A: The CDBD8100-G is obsolete with limited remaining inventory. The STPS8H100G-TR is available in Cut Tape (CT) and Digi-Reel packaging options with 7000 pieces in current stock, ensuring reliable supply for production requirements.

Q: What applications are these Schottky diodes suitable for?

A: Both devices are suitable for power supply circuits, DC-DC converters, reverse polarity protection, and other applications requiring fast recovery rectification at 100V and 8A ratings. The improved characteristics of the STPS8H100G-TR make it preferable for new designs.