CDBA3150-HF Equivalent & Substitute Parts

Part Overview

The CDBA3150-HF is an active Schottky rectifier diode manufactured by Comchip Technology, rated for 150V DC reverse voltage and 3A average rectified current in a surface mount DO-214AC (SMA) package. This component is designed for fast recovery applications with forward voltage of 870 mV at 2A and reverse leakage current of 500 µA at 150V. The part is ROHS3 compliant, REACH unaffected, and maintains unlimited moisture sensitivity level (MSL 1). Equivalent and substitute parts are identified to support design flexibility, supply chain continuity, and application-specific requirements where electrical and mechanical parameters align within acceptable tolerances.

Substiute Parts

CDBA3150-HF

Comchip TechnologyIn Stock: 4204CDBA3150-HF Datasheet

Current PartRFQ

STPS2150A

STMicroelectronicsIn Stock: 1005309STPS2150A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDBA3150-HF is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

• Voltage - DC Reverse (Vr) (Max): 150V minimum
• Package / Case: DO-214AC (SMA) surface mount
• Technology: Schottky diode
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: MSL 1

Allowable Variation Parameters:

• Current - Average Rectified (Io): Equal or greater than 3A
• Voltage - Forward (Vf) (Max) @ If: Within acceptable forward voltage range for 150V Schottky diodes
• Current - Reverse Leakage @ Vr: Lower values acceptable (improved performance)
• Operating Temperature - Junction: Maximum rating of 175°C or higher

The STPS2150A from STMicroelectronics meets the critical matching parameters. However, the Current - Average Rectified (Io) rating of 2A is lower than the CDBA3150-HF specification of 3A. This substitution is valid only in applications where the actual operating current does not exceed 2A, despite the main part's higher current rating.

Parameter Comparison

Engineering Selection Recommendations

CDBA3150-HF Selection Criteria: Select the CDBA3150-HF when applications require the full 3A average rectified current rating. This part is active, ROHS3 compliant, and REACH unaffected, supporting compliance requirements for regulated markets. The part maintains MSL 1 rating, eliminating moisture sensitivity constraints during storage and assembly.

STPS2150A Selection Criteria: The STPS2150A from STMicroelectronics is suitable as a substitute only when the actual operating current requirement does not exceed 2A. This substitute offers improved performance characteristics: lower forward voltage (820 mV vs. 870 mV at 2A) and significantly lower reverse leakage current (1.5 µA vs. 500 µA at 150V). The part is active, ROHS3 compliant, and REACH unaffected. Both parts share identical package geometry (DO-214AC/SMA), reverse voltage rating (150V), and fast recovery speed specification, enabling direct PCB footprint compatibility.

Compliance Alignment: Both parts maintain ROHS3 compliance and REACH unaffected status, supporting regulatory requirements across EU and international markets. MSL 1 rating on both parts eliminates moisture-related handling constraints.

Frequently Asked Questions (FAQ)

Q: Can STPS2150A replace CDBA3150-HF in all applications?

A: No. The STPS2150A has a maximum average rectified current rating of 2A, compared to the CDBA3150-HF rating of 3A. Substitution is valid only when the actual operating current does not exceed 2A. Applications requiring sustained 3A operation must use the CDBA3150-HF or an equivalent part with 3A or higher rating.

Q: Are the packages physically identical?

A: Yes. Both CDBA3150-HF and STPS2150A use the DO-214AC (SMA) surface mount package. PCB footprints are identical, enabling direct component substitution without layout modifications.

Q: What is the voltage rating compatibility?

A: Both parts are rated for 150V DC reverse voltage. They are fully compatible for applications operating at or below 150V reverse bias.

Q: How do forward voltage characteristics compare?

A: The STPS2150A exhibits lower forward voltage (820 mV at 2A) compared to the CDBA3150-HF (870 mV at 2A). This represents improved efficiency in the substitute part, resulting in lower power dissipation at equivalent current levels.

Q: What is the reverse leakage current difference?

A: The STPS2150A has significantly lower reverse leakage current (1.5 µA at 150V) compared to the CDBA3150-HF (500 µA at 150V). Lower leakage current improves circuit performance in high-impedance applications and reduces standby power consumption.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both CDBA3150-HF and STPS2150A are ROHS3 compliant and REACH unaffected, supporting regulatory requirements for restricted substance use and chemical safety.

Q: What is the operating temperature range?

A: The CDBA3150-HF operates from -50°C to 175°C junction temperature. The STPS2150A maximum junction temperature is 175°C. Both parts support industrial and commercial temperature ranges.

Q: Does moisture sensitivity affect component handling?

A: No. Both parts carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity constraints. Standard handling procedures apply without special drying or storage requirements.

Q: What is the fast recovery speed specification?

A: Both parts meet fast recovery specification of ≤ 500ns for currents greater than 200mA (Io), supporting high-frequency switching applications.