CDBA120LL-HF Equivalent & Substitute Parts

Part Overview

The CDBA120LL-HF is a Schottky rectifier diode manufactured by Comchip Technology, rated for 20 V DC reverse voltage and 1 A average rectified current in a surface mount DO-214AC (SMA) package. This component is classified as obsolete product status. Identification of equivalent and substitute parts is necessary to support ongoing design requirements, procurement continuity, and system maintenance where the original part is no longer available from the manufacturer.

Substiute Parts

CDBA120LL-HF

Comchip TechnologyIn Stock: 748CDBA120LL-HF Datasheet

Current PartRFQ

CDBA140LL-HF

Comchip TechnologyIn Stock: 42699CDBA140LL-HF Datasheet

DirectRFQ

B120-13-F

Diodes IncorporatedIn Stock: 109117B120-13-F Datasheet

MFR RecommendedRFQ

B120-E3/5AT

Vishay General Semiconductor - Diodes DivisionIn Stock: 7823B120-E3/5AT Datasheet

MFR RecommendedRFQ

B320A-13-F

Diodes IncorporatedIn Stock: 35129B320A-13-F Datasheet

MFR RecommendedRFQ

MBRA120ET3G

onsemiIn Stock: 16646MBRA120ET3G Datasheet

MFR RecommendedRFQ

SS12

Taiwan Semiconductor CorporationIn Stock: 65317SS12 Datasheet

MFR RecommendedRFQ

SS12-E3/61T

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

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDBA120LL-HF is determined by the following critical parameters:

Primary Substitution Criteria:

• Voltage - DC Reverse (Vr) (Max): Must be ≥ 20 V
• Current - Average Rectified (Io): Must be ≥ 1 A
• Package / Case: Must be DO-214AC (SMA) surface mount
• Technology: Schottky diode
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Acceptable Variation Parameters:

• Voltage - Forward (Vf) (Max) @ If: Higher values acceptable within circuit design margins
• Current - Reverse Leakage @ Vr: Lower values acceptable (improved performance)
• Operating Temperature - Junction: Extended ranges acceptable
• Capacitance @ Vr, F: Variations acceptable if not specified in circuit design

Substitute Parts Identified:

Group 1: Direct Electrical Equivalents (20 V, 1 A Rating)

• B120-13-F (Diodes Incorporated)
• B120-E3/5AT (Vishay General Semiconductor - Diodes Division)
• MBRA120ET3G (onsemi)
• SS12 (Taiwan Semiconductor Corporation)
• SS12-E3/61T (Vishay General Semiconductor - Diodes Division)

Group 2: Higher Voltage Rating (40 V, 1 A Rating)

• CDBA140LL-HF (Comchip Technology) — Same manufacturer, higher voltage capability

Group 3: Higher Current Rating (20 V, 3 A Rating)

• B320A-13-F (Diodes Incorporated) — Automotive qualified, higher current capability

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Specifications):

Select from Group 1 parts (B120-13-F, B120-E3/5AT, MBRA120ET3G, SS12, SS12-E3/61T) when the circuit design requires 20 V, 1 A Schottky diode performance. All Group 1 substitutes maintain the same voltage and current ratings as the CDBA120LL-HF. All Group 1 parts carry active product status and ROHS3 compliance, ensuring long-term availability and regulatory conformance.

For Higher Voltage Applications:

CDBA140LL-HF (Comchip Technology) provides 40 V reverse voltage rating while maintaining 1 A current capacity. This part is suitable for circuits where higher voltage margin is required. Same manufacturer origin ensures consistent device characteristics.

For Higher Current Applications:

B320A-13-F (Diodes Incorporated) provides 3 A average rectified current at 20 V reverse voltage. This part includes AEC-Q101 automotive qualification and extended operating temperature range (-55°C ~ 150°C). Selection is appropriate for applications requiring increased current handling capacity.

Compliance Considerations:

All active substitute parts listed carry ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements for electronic component procurement.

Frequently Asked Questions (FAQ)

Q: Can B120-13-F directly replace CDBA120LL-HF in all applications?

A: B120-13-F is electrically compatible as a direct substitute. Both parts share identical voltage (20 V) and current (1 A) ratings, same DO-214AC (SMA) package, and fast recovery Schottky technology. Forward voltage is higher (500 mV vs. 330 mV @ 1 A), which may increase power dissipation in high-frequency switching applications. Verify circuit design margins before implementation.

Q: What is the difference between SS12 and SS12-E3/61T?

A: Both parts are manufactured by Vishay General Semiconductor - Diodes Division with identical electrical specifications (20 V, 1 A, 500 mV forward voltage). SS12-E3/61T is supplied in Tape & Reel (TR) packaging, while SS12 is available in Cut Tape (CT) & Digi-Reel® format. Selection depends on assembly process requirements and packaging preferences.

Q: Is MBRA120ET3G suitable for high-temperature applications?

A: MBRA120ET3G operates across -55°C ~ 150°C junction temperature range, compared to CDBA120LL-HF at -50°C ~ 100°C. This extended range supports applications requiring higher temperature operation. Reverse leakage current is significantly lower (10 µA vs. 1 mA @ 20 V), indicating improved performance at elevated temperatures.

Q: When should CDBA140LL-HF be selected instead of direct equivalents?

A: CDBA140LL-HF is selected when circuit design requires higher reverse voltage margin (40 V vs. 20 V). This part is appropriate for applications where voltage transients or overvoltage conditions may exceed 20 V. Current rating remains 1 A, matching the original part.

Q: Is B320A-13-F compatible with CDBA120LL-HF footprints?

A: B320A-13-F uses identical DO-214AC (SMA) package and surface mount configuration, ensuring mechanical and electrical footprint compatibility. However, this part is rated for 3 A average rectified current versus 1 A. Selection is appropriate only when higher current capacity is required by circuit design.

Q: What packaging options are available for Group 1 substitutes?

A: B120-13-F and MBRA120ET3G are supplied in Cut Tape (CT) & Digi-Reel® format. B120-E3/5AT and SS12-E3/61T are supplied in Tape & Reel (TR) format. SS12 is available in Cut Tape (CT) & Digi-Reel® format. Selection depends on assembly equipment compatibility and procurement volume requirements.

Q: Are all substitute parts ROHS3 compliant?

A: All active substitute parts (Group 1, CDBA140LL-HF, and B320A-13-F) carry ROHS3 compliance certification. The original CDBA120LL-HF does not specify RoHS status due to obsolete product classification. Compliance verification is recommended for new designs.