CDBA320L-G Schottky Diode Equivalent & Substitute Parts

Part Overview

The CDBA320L-G is a Schottky rectifier diode manufactured by Comchip Technology, rated for 20 V DC reverse voltage and 3 A average rectified current in a surface mount DO-214AC (SMA) package. This component is classified as obsolete, necessitating identification of equivalent and substitute parts for ongoing design support and procurement continuity. Substitute parts are selected based on matching or exceeding electrical performance within the same package form factor and mounting technology.

Substiute Parts

CDBA320L-G

Comchip TechnologyIn Stock: 6188CDBA320L-G Datasheet

Current PartRFQ

CDBA340L-G

Comchip TechnologyIn Stock: 5416CDBA340L-G Datasheet

DirectRFQ

CDBA340L-HF

Comchip TechnologyIn Stock: 12392CDBA340L-HF Datasheet

DirectRFQ

B320A-13-F

Diodes IncorporatedIn Stock: 35129B320A-13-F Datasheet

MFR RecommendedRFQ

SBR3U20SA-13

Diodes IncorporatedIn Stock: 9166SBR3U20SA-13 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CDBA320L-G are grouped into two categories based on electrical compatibility:

Category 1: Higher Voltage Rating (40 V) - Comchip Technology Parts CDBA340L-G and CDBA340L-HF maintain the same 3 A current rating and fast recovery speed while increasing the reverse voltage rating to 40 V. These parts are direct upgrades in voltage capability and are pin-compatible in the DO-214AC package. The higher voltage rating provides design margin for applications where the original 20 V specification may be marginal.

Category 2: Same Voltage Rating (20 V) - Alternative Manufacturers Parts B320A-13-F (Diodes Incorporated) and SBR3U20SA-13 (Diodes Incorporated) maintain the original 20 V reverse voltage and 3 A current specifications. B320A-13-F is a standard Schottky diode with automotive qualification (AEC-Q101). SBR3U20SA-13 uses Super Barrier technology, offering lower forward voltage (390 mV @ 3 A) compared to the original part (380 mV @ 3 A).

Substitution is determined by the following key parameters:

• Voltage - DC Reverse (Vr) (Max): Must equal or exceed 20 V
• Current - Average Rectified (Io): Must equal or exceed 3 A
• Package / Case: Must be DO-214AC or SMA equivalent
• Mounting Type: Must be Surface Mount
• Speed: Must maintain Fast Recovery ≤ 500ns, > 200mA (Io)

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Same Electrical Specifications): B320A-13-F and SBR3U20SA-13 maintain the original 20 V / 3 A rating. Both parts are active products with ROHS3 compliance. B320A-13-F includes AEC-Q101 automotive qualification, suitable for applications requiring automotive-grade reliability. SBR3U20SA-13 offers marginally lower forward voltage (390 mV vs. 380 mV), reducing power dissipation by approximately 30 mW at 3 A operation.

For Voltage-Upgraded Substitution: CDBA340L-G and CDBA340L-HF provide 40 V reverse voltage rating while maintaining 3 A current capacity. Both are active Comchip Technology products with ROHS3 compliance. CDBA340L-HF offers improved reverse leakage (1 mA @ 40 V vs. 1.5 mA @ 40 V) and extended operating temperature range (-50°C to 100°C). These parts are suitable for applications where design margin or circuit topology changes necessitate higher voltage capability.

Compliance Considerations: All substitute parts are ROHS3 compliant and REACH unaffected. Moisture sensitivity level remains MSL 1 (Unlimited) across all options, eliminating moisture-related procurement constraints.

Frequently Asked Questions (FAQ)

Q: Can CDBA340L-G or CDBA340L-HF be used as direct replacements for CDBA320L-G? A: Yes. Both parts are pin-compatible in the DO-214AC package and support the same 3 A current rating. The 40 V reverse voltage rating exceeds the original 20 V specification, providing design margin. Forward voltage increases slightly (400 mV vs. 380 mV @ 3 A), resulting in approximately 60 mW additional power dissipation per device.

Q: What is the difference between CDBA340L-G and CDBA340L-HF? A: Both are 40 V / 3 A Schottky diodes from Comchip Technology in DO-214AC packages. CDBA340L-HF offers lower reverse leakage (1 mA vs. 1.5 mA @ 40 V), specified capacitance (300 pF @ 4 V, 1 MHz), and extended operating temperature range (-50°C to 100°C vs. 125°C max). Packaging differs: CDBA340L-G is supplied in Tape & Reel, while CDBA340L-HF is supplied in Cut Tape & Digi-Reel.

Q: How do B320A-13-F and SBR3U20SA-13 differ from the original CDBA320L-G? A: B320A-13-F and SBR3U20SA-13 maintain the original 20 V / 3 A specifications but are manufactured by Diodes Incorporated. B320A-13-F is a standard Schottky diode with AEC-Q101 automotive qualification and extended temperature range (-55°C to 150°C). SBR3U20SA-13 uses Super Barrier technology, achieving lower forward voltage (390 mV vs. 380 mV @ 3 A) and lower reverse leakage (500 µA vs. 1.5 mA @ 20 V).

Q: Are all substitute parts available in the same packaging options? A: All substitute parts are supplied in surface mount DO-214AC (SMA) packages. Packaging formats differ: CDBA340L-G is Tape & Reel; CDBA340L-HF is Cut Tape & Digi-Reel; B320A-13-F is Cut Tape & Digi-Reel; SBR3U20SA-13 is Tape & Reel. Verify packaging compatibility with your assembly process requirements.

Q: Which substitute part offers the lowest forward voltage drop? A: SBR3U20SA-13 provides the lowest forward voltage at 390 mV @ 3 A, compared to 380 mV for the original CDBA320L-G and 400 mV for the CDBA340L series. This 10 mV reduction translates to approximately 30 mW lower power dissipation per device at 3 A operation.

Q: Can I use these parts interchangeably in high-temperature applications? A: B320A-13-F and SBR3U20SA-13 support operating temperatures up to 150°C, exceeding the original CDBA320L-G specification (125°C max). CDBA340L-HF is limited to 100°C maximum junction temperature. Verify thermal requirements against your application specifications before selection.