Equivalent & Substitute Parts for CDBA120SL-G Schottky Diode

Part Overview

The CDBA120SL-G is a Schottky rectifier diode manufactured by Comchip Technology, rated for 20V DC reverse voltage and 1A average rectified current in a surface mount DO-214AC (SMA) package. This component is classified as obsolete product status. Due to its obsolete designation, equivalent and substitute parts from active manufacturers are necessary to maintain design continuity and ensure long-term supply chain reliability for applications requiring 20V/1A Schottky diode functionality.

Substiute Parts

CDBA120SL-G

Comchip TechnologyIn Stock: 1255CDBA120SL-G Datasheet

Current PartRFQ

CDBA140SL-HF

Comchip TechnologyIn Stock: 319098CDBA140SL-HF Datasheet

DirectRFQ

CDBA140SL-G

Comchip TechnologyIn Stock: 2114CDBA140SL-G Datasheet

MFR RecommendedRFQ

B120-13-F

Diodes IncorporatedIn Stock: 109117B120-13-F Datasheet

MFR RecommendedRFQ

B120-M3/5AT

Vishay General Semiconductor - Diodes DivisionIn Stock: 842B120-M3/5AT Datasheet

MFR RecommendedRFQ

B120-M3/61T

Vishay General Semiconductor - Diodes DivisionIn Stock: 977B120-M3/61T Datasheet

MFR RecommendedRFQ

B120Q-13-F

Diodes IncorporatedIn Stock: 25426B120Q-13-F Datasheet

MFR RecommendedRFQ

MBRA120ET3G

onsemiIn Stock: 16646MBRA120ET3G Datasheet

MFR RecommendedRFQ

SS12

Taiwan Semiconductor CorporationIn Stock: 65317SS12 Datasheet

MFR RecommendedRFQ

SS12-E3/5AT

Vishay General Semiconductor - Diodes DivisionIn Stock: 5820SS12-E3/5AT Datasheet

MFR RecommendedRFQ

SS12-E3/61T

Vishay General Semiconductor - Diodes DivisionIn Stock: 71963SS12-E3/61T Datasheet

MFR RecommendedRFQ

SS12-LTP

Micro Commercial CoIn Stock: 10174SS12-LTP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the CDBA120SL-G is determined by strict electrical and mechanical parameter matching within the Schottky diode rectifier category. The following criteria establish valid substitutes:

Primary Substitution Criteria:

• Voltage - DC Reverse (Vr) (Max): 20V minimum (higher voltage ratings are acceptable for backward compatibility)
• Current - Average Rectified (Io): 1A minimum (higher current ratings are acceptable)
• Technology: Schottky (mandatory)
• Mounting Type: Surface Mount (mandatory)
• Package / Case: DO-214AC / SMA (mandatory)
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io) (mandatory)

Substitution Logic: Parts are grouped into two categories based on voltage rating:

Category A - Direct Voltage Match (20V): Parts with 20V DC reverse voltage rating match the original specification exactly. These include B120-13-F, B120-M3/5AT, B120-M3/61T, B120Q-13-F, MBRA120ET3G, SS12, SS12-E3/5AT, and SS12-E3/61T.

Category B - Higher Voltage Rating (40V): Parts with 40V DC reverse voltage rating (CDBA140SL-HF, CDBA140SL-G) provide enhanced voltage margin and are suitable for applications where the circuit design permits higher voltage-rated components without functional impact.

All substitute parts maintain the same surface mount DO-214AC (SMA) package configuration and fast recovery Schottky technology, ensuring mechanical and electrical compatibility.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (20V Rating):

Select from active manufacturer parts with 20V DC reverse voltage rating to maintain electrical specification parity with the obsolete CDBA120SL-G. All recommended substitutes are ROHS3 compliant and carry active product status, ensuring ongoing availability and supply chain support.

B120Q-13-F (Diodes Incorporated) is suitable for applications requiring automotive-grade qualification (AEC-Q101 certified). This part carries automotive qualification and is recommended for automotive and safety-critical applications.

SS12-E3/61T or SS12-E3/5AT (Vishay General Semiconductor - Diodes Division) are suitable for general industrial applications. Both parts are available in high inventory quantities and offer consistent electrical performance across the operating temperature range.

MBRA120ET3G (onsemi) offers the lowest reverse leakage current (10 µA @ 20V) among 20V substitutes, making it suitable for low-leakage applications.

For Higher Voltage Margin (40V Rating):

CDBA140SL-G (Comchip Technology) maintains manufacturer continuity while providing 40V voltage rating. This part matches the original forward voltage specification (310 mV @ 1A) and is recommended when circuit design permits higher voltage-rated components.

CDBA140SL-HF (Comchip Technology) offers higher current rating (1.4A) and is suitable for applications requiring additional current margin beyond the 1A specification.

All recommended substitutes maintain surface mount DO-214AC (SMA) package compatibility, ensuring no PCB layout modifications are required.

Frequently Asked Questions (FAQ)

Q1: Can I use a 40V-rated Schottky diode (CDBA140SL-G or CDBA140SL-HF) as a direct replacement for the 20V CDBA120SL-G?

A: Yes. Higher voltage-rated Schottky diodes are electrically compatible with lower voltage circuit requirements. The 40V parts will function correctly in circuits designed for 20V operation. However, verify that circuit design does not depend on specific voltage regulation characteristics that may differ between 20V and 40V rated parts.

Q2: What is the difference between the various packaging codes (Tape & Reel, Cut Tape, Digi-Reel) for substitute parts?

A: Packaging codes indicate the physical format for component delivery and handling. Tape & Reel (TR) is standard for automated assembly lines. Cut Tape (CT) and Digi-Reel are alternative formats for lower-volume applications. All formats contain identical electrical components in the same DO-214AC (SMA) package. Select based on your assembly process requirements, not electrical performance.

Q3: Why do some substitute parts show higher forward voltage (Vf) specifications than the original CDBA120SL-G?

A: Forward voltage variation (310 mV to 530 mV @ 1A) is within normal manufacturing tolerance for Schottky diodes and reflects different semiconductor process technologies across manufacturers. All listed parts meet the fast recovery Schottky specification (≤ 500ns). Verify that your circuit design accommodates the maximum forward voltage specification of the selected substitute part.

Q4: Is the B120Q-13-F automotive-qualified version compatible with non-automotive applications?

A: Yes. Automotive-qualified parts (AEC-Q101) meet more stringent reliability and testing requirements than standard industrial parts. They are fully compatible with non-automotive applications and offer enhanced reliability margin.

Q5: What is the significance of reverse leakage current differences among substitute parts?

A: Reverse leakage current (ranging from 10 µA to 1 mA @ 20V) indicates the small current that flows through the diode in reverse bias condition. Lower leakage is beneficial for low-power or precision applications. Higher leakage is acceptable for general-purpose rectification. Select based on your circuit's sensitivity to leakage current.

Q6: Can I mix different substitute part manufacturers in the same circuit board design?

A: Yes. All listed substitute parts meet identical electrical specifications for voltage, current, and package. Mixing manufacturers is acceptable from an electrical standpoint. However, for manufacturing consistency and supply chain management, using a single manufacturer per design is recommended.

Q7: Are all substitute parts RoHS3 compliant?

A: All active substitute parts listed are ROHS3 compliant. The original CDBA120SL-G (obsolete) does not specify RoHS status. If RoHS compliance is a requirement for your application, select from the active substitute parts, all of which carry ROHS3 Compliant designation.