CDBMT220L-G Schottky Diode Equivalent & Substitute Parts

Part Overview

The CDBMT220L-G is a Schottky rectifier diode manufactured by Comchip Technology, rated for 20V DC reverse voltage and 2A average rectified current in a surface mount SOD-123H package. This part is classified as obsolete, making identification of equivalent and substitute components necessary for ongoing design support and procurement continuity. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts may have minor parameter variations within acceptable application ranges.

Substiute Parts

CDBMT220L-G

Comchip TechnologyIn Stock: 1136CDBMT220L-G Datasheet

Current PartRFQ

CDBMT220L-HF

Comchip TechnologyIn Stock: 1052CDBMT220L-HF Datasheet

Parametric EquivalentRFQ

SS12FP

Fairchild SemiconductorIn Stock: 155383SS12FP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the CDBMT220L-G is based on the following critical parameters:

Electrical Compatibility Criteria:

• Voltage - DC Reverse (Vr) (Max): Must equal or exceed 20V
• Current - Average Rectified (Io): Must equal or exceed 2A
• Technology: Schottky diode type
• Speed: Fast Recovery characteristic (≤ 500ns, > 200mA)
• Package / Case: SOD-123H form factor for mechanical fit

Compliance & Availability Criteria:

• RoHS3 Compliance required
• Product Status: Active or Obsolete acceptable
• Moisture Sensitivity Level: MSL 1 preferred for unlimited shelf life

Substitute Categories:

Category 1 - Parametric Equivalent (Direct Replacement): CDBMT220L-HF maintains identical electrical specifications and package configuration. This part differs only in packaging format (Tape & Reel vs. bulk) and product status (Active vs. Obsolete), making it a direct functional equivalent.

Category 2 - Functional Substitute (Parameter Variation): SS12FP provides equivalent reverse voltage and package type but operates at reduced current rating (1A vs. 2A) and exhibits higher forward voltage drop and reverse leakage. This part is suitable only for applications where the 2A current requirement can be reduced or where parallel configurations are implemented.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Preferred): CDBMT220L-HF is the recommended equivalent for CDBMT220L-G. Both parts are manufactured by Comchip Technology and maintain identical electrical specifications across all critical parameters. The primary distinction is product status: CDBMT220L-HF is currently in active production, ensuring long-term availability and supply chain stability. Both parts carry ROHS3 compliance and MSL 1 rating. Selection of CDBMT220L-HF eliminates obsolescence risk while preserving all functional characteristics of the original design.

For Alternative Selection: SS12FP from Fairchild Semiconductor is an active product with extended operating temperature range (-55 to 150°C vs. -55 to 100°C). However, this part operates at half the current rating (1A vs. 2A) and exhibits higher forward voltage drop (450 mV @ 1A vs. 380 mV @ 2A) and increased reverse leakage (400 µA vs. 1 mA). SS12FP is suitable only for applications where circuit current requirements can be reduced or where the higher forward voltage drop and leakage are acceptable. This part includes AEC-Q101 automotive qualification, which may be beneficial for automotive applications.

Compliance Status: All three parts maintain ROHS3 compliance and are suitable for environmentally regulated applications. CDBMT220L-HF and CDBMT220L-G share identical compliance profiles, while SS12FP adds automotive-grade qualification.

Frequently Asked Questions (FAQ)

Q: Can CDBMT220L-HF be used as a direct replacement for CDBMT220L-G?

A: Yes. CDBMT220L-HF is a parametric equivalent with identical electrical specifications and package configuration. The only differences are packaging format (Tape & Reel vs. bulk) and product status (Active vs. Obsolete). No circuit modifications are required.

Q: What are the limitations of using SS12FP as a substitute?

A: SS12FP operates at 1A average rectified current, half the rating of CDBMT220L-G. Additionally, forward voltage drop is higher (450 mV vs. 380 mV) and reverse leakage is increased (400 µA vs. 1 mA). These differences may impact circuit efficiency and thermal performance. SS12FP is suitable only for applications where reduced current requirements or higher voltage drop are acceptable.

Q: Are all three parts compatible with the SOD-123H package footprint?

A: Yes. All three parts use the SOD-123H surface mount package, ensuring mechanical compatibility with existing PCB layouts. No footprint modifications are necessary.

Q: Which part should be selected for new designs?

A: CDBMT220L-HF is recommended for new designs. It maintains full electrical equivalence to the original part while offering active product status and guaranteed long-term availability. SS12FP should be considered only if the reduced current rating and higher forward voltage drop align with specific application requirements.

Q: Do all parts meet RoHS compliance requirements?

A: Yes. CDBMT220L-G, CDBMT220L-HF, and SS12FP are all ROHS3 compliant and suitable for applications requiring environmental compliance.

Q: What is the difference between bulk and Tape & Reel packaging?

A: Bulk packaging is suitable for manual assembly or small-volume applications. Tape & Reel (TR) packaging is designed for automated pick-and-place assembly and high-volume production. Both formats contain identical components; the difference is in handling and delivery method.