CDBT-54-G Schottky Diode 30V 200mA SOT-23-3 Equivalent & Substitute Parts

Part Overview

The CDBT-54-G is a surface mount Schottky diode manufactured by Comchip Technology, designed for general-purpose rectification applications requiring low forward voltage drop and fast switching characteristics. This component operates at a maximum reverse voltage of 30V with an average rectified current rating of 200mA in a compact SOT-23-3 package. The part is currently in active production status with RoHS3 compliance and unlimited moisture sensitivity level (MSL 1), making it suitable for standard industrial and commercial applications. Equivalent substitute parts are identified based on matching electrical specifications and mechanical compatibility to ensure direct interchangeability in circuit designs.

Substiute Parts

CDBT-54-G

Comchip TechnologyIn Stock: 1152CDBT-54-G Datasheet

Current PartRFQ

BAT54-G

Comchip TechnologyIn Stock: 20631BAT54-G Datasheet

Parametric EquivalentRFQ

BAT54-HF

Comchip TechnologyIn Stock: 38211BAT54-HF Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CDBT-54-G are identified through strict parametric matching of electrical and mechanical specifications. The substitution logic is based on the following critical parameters that determine functional interchangeability:

Electrical Matching Criteria:

• Voltage - DC Reverse (Vr) (Max): 30V
• Current - Average Rectified (Io): 200mA
• Voltage - Forward (Vf) (Max) @ If: 1V @ 100mA
• Reverse Recovery Time (trr): 5ns
• Current - Reverse Leakage @ Vr: 2µA @ 25V
• Capacitance @ Vr, F: 10pF @ 1V, 1MHz

Mechanical Matching Criteria:

• Package / Case: TO-236-3, SC-59, SOT-23-3
• Mounting Type: Surface Mount
• Technology: Schottky

All substitute parts listed below meet these electrical and mechanical requirements, ensuring direct pin-compatible replacement in circuit applications without design modification.

Parameter Comparison

Engineering Selection Recommendations

BAT54-G Substitution: The BAT54-G is a parametric equivalent to the CDBT-54-G with identical electrical ratings across voltage, current, and switching characteristics. Both parts share the same SOT-23-3 package configuration and surface mount technology. The BAT54-G maintains ROHS3 compliance and MSL 1 rating. A notable difference exists in reverse leakage current specification: BAT54-G is rated at 2mA @ 25V compared to CDBT-54-G at 2µA @ 25V. This represents a 1000-fold difference in leakage current. Selection of BAT54-G is appropriate when higher reverse leakage current is acceptable within circuit design margins. Both parts are in active production status.

BAT54-HF Substitution: The BAT54-HF is a parametric equivalent to the CDBT-54-G with identical electrical ratings for voltage, current, and switching performance. This part matches the reverse leakage current specification of 2µA @ 25V and all other electrical parameters. The BAT54-HF is supplied in Cut Tape (CT) and Digi-Reel® packaging options in addition to standard Tape & Reel (TR). The part maintains ROHS3 compliance and MSL 1 rating with active production status. Selection of BAT54-HF is appropriate when packaging format flexibility or higher inventory availability is required.

Compliance and Certification: All substitute parts maintain identical RoHS3 compliance status and REACH unaffected designation. ECCN classification (EAR99) and HTSUS code (8541.10.0070) are consistent across all parts, supporting regulatory and trade compliance requirements.

Frequently Asked Questions (FAQ)

Q: Can BAT54-G be used as a direct replacement for CDBT-54-G?

A: BAT54-G is electrically and mechanically compatible with CDBT-54-G for most applications. Both parts share identical voltage ratings (30V), current ratings (200mA), forward voltage drop (1V @ 100mA), and package configuration (SOT-23-3). The primary difference is reverse leakage current: BAT54-G specifies 2mA @ 25V versus CDBT-54-G at 2µA @ 25V. Direct substitution is valid when circuit design tolerates higher reverse leakage current.

Q: What is the difference between BAT54-G and BAT54-HF?

A: BAT54-G and BAT54-HF are electrically identical Schottky diodes with matching 30V reverse voltage, 200mA current rating, and 5ns reverse recovery time. The primary differences are packaging format and reverse leakage current specification. BAT54-HF specifies 2µA @ 25V reverse leakage (matching CDBT-54-G), while BAT54-G specifies 2mA @ 25V. BAT54-HF is available in Cut Tape and Digi-Reel® packaging options.

Q: Are all substitute parts in the same SOT-23-3 package?

A: Yes. CDBT-54-G, BAT54-G, and BAT54-HF are all specified in TO-236-3, SC-59, SOT-23-3 package configuration. All parts are surface mount devices with identical pin assignments and mechanical dimensions, supporting direct PCB footprint compatibility.

Q: Do substitute parts maintain RoHS3 compliance?

A: Yes. CDBT-54-G, BAT54-G, and BAT54-HF are all ROHS3 compliant with MSL 1 (unlimited) moisture sensitivity level. All parts are REACH unaffected and classified under ECCN EAR99, maintaining consistent regulatory compliance across substitution options.

Q: Which substitute part should be selected for new designs?

A: Selection between BAT54-G and BAT54-HF depends on specific application requirements and packaging preferences. BAT54-HF is recommended when reverse leakage current specification of 2µA @ 25V is critical to circuit performance, matching CDBT-54-G exactly. BAT54-G is suitable when higher reverse leakage current (2mA @ 25V) is acceptable. Both parts are in active production with established supply availability.

Q: Can these parts be used interchangeably in high-frequency switching applications?

A: All three parts share identical reverse recovery time (trr) of 5ns and capacitance specifications (10pF @ 1V, 1MHz), supporting equivalent performance in high-frequency switching circuits. Interchangeability is determined by reverse leakage current tolerance and circuit design margins rather than switching speed characteristics.