CDBT-54S-HF Equivalent & Substitute Parts

Part Overview

The CDBT-54S-HF is a Schottky diode array manufactured by Comchip Technology, configured as a 1 Pair Series Connection device rated for 30 V DC reverse voltage and 200 mA average rectified current per diode. The component is packaged in SOT-23-3 (TO-236-3, SC-59) surface mount configuration and is currently in active production status with RoHS3 compliance and unlimited moisture sensitivity rating.

Substitute parts are identified to address supply chain requirements, inventory availability, or specific application constraints while maintaining electrical and mechanical compatibility within the defined parameter envelope.

Substiute Parts

CDBT-54S-HF

Comchip TechnologyIn Stock: 728CDBT-54S-HF Datasheet

Current PartRFQ

BAT54-7-F

Diodes IncorporatedIn Stock: 443299BAT54-7-F Datasheet

SimilarRFQ

BAT54A,235

Nexperia USA Inc.In Stock: 94553BAT54A,235 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CDBT-54S-HF is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Technology: Schottky
• Voltage - DC Reverse (Vr) (Max): 30 V
• Current - Average Rectified (Io): 200 mA per diode
• Package / Case: TO-236-3, SC-59, SOT-23-3
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

Allowable Variation Parameters:

• Voltage - Forward (Vf) (Max) @ If: Up to 1.0 V @ 100 mA
• Reverse Recovery Time (trr): 5 ns
• Current - Reverse Leakage @ Vr: 2 µA @ 25 V
• Operating Temperature - Junction: Rated to minimum 125°C

The identified substitute parts BAT54-7-F and BAT54A,235 satisfy all mandatory matching parameters and operate within the allowable variation envelope for forward voltage and reverse leakage characteristics.

Parameter Comparison

Engineering Selection Recommendations

CDBT-54S-HF (Primary Part)

The CDBT-54S-HF remains the primary selection when available. This part is actively manufactured by Comchip Technology, carries ROHS3 compliance, and meets all specified electrical parameters for 30 V, 200 mA Schottky diode applications in SOT-23-3 packaging.

BAT54-7-F (Diodes Incorporated)

The BAT54-7-F is a direct functional equivalent with superior forward voltage performance (0.8 V vs. 1.0 V @ 100 mA), resulting in lower power dissipation. This part is actively produced and ROHS3 compliant. The extended operating temperature range (-65°C ~ 150°C) provides additional thermal margin compared to the primary part. Packaging is supplied as Cut Tape (CT) & Digi-Reel® rather than Tape & Reel (TR).

BAT54A,235 (Nexperia USA Inc.)

The BAT54A,235 is functionally equivalent with matching forward voltage performance (0.8 V @ 100 mA). This part carries AEC-Q101 automotive qualification and is actively produced by Nexperia with ROHS3 compliance and REACH Unaffected status. The diode configuration differs (1 Pair Common Anode vs. 1 Pair Series Connection), requiring circuit-level verification of pin compatibility. Packaging is supplied as Tape & Reel (TR).

All three parts satisfy the mandatory electrical and mechanical substitution criteria and maintain active production status with full regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can BAT54-7-F be used as a direct replacement for CDBT-54S-HF?

A: Yes. Both parts are Schottky diodes rated for 30 V, 200 mA in SOT-23-3 packaging with identical reverse recovery time and reverse leakage characteristics. The BAT54-7-F exhibits lower forward voltage (0.8 V vs. 1.0 V @ 100 mA), which reduces power dissipation and is compatible with applications designed for the CDBT-54S-HF.

Q: What is the difference between the CDBT-54S-HF and BAT54A,235 diode configurations?

A: The CDBT-54S-HF is configured as a 1 Pair Series Connection, while the BAT54A,235 is configured as a 1 Pair Common Anode. These configurations result in different pin connections. Verify circuit schematic compatibility before substitution.

Q: Are all three parts RoHS3 compliant?

A: Yes. The CDBT-54S-HF, BAT54-7-F, and BAT54A,235 are all ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited).

Q: Does the BAT54A,235 automotive qualification affect its use in non-automotive applications?

A: No. AEC-Q101 qualification indicates the part meets automotive reliability standards and is suitable for any application requiring equivalent electrical performance. The qualification does not restrict use in non-automotive circuits.

Q: What is the impact of forward voltage differences between these parts?

A: The CDBT-54S-HF specifies 1.0 V maximum forward voltage, while BAT54-7-F and BAT54A,235 specify 0.8 V maximum. Lower forward voltage reduces power dissipation and heat generation. Applications designed for 1.0 V forward voltage will operate with improved efficiency using the lower-voltage alternatives.

Q: Can packaging format differences affect substitution?

A: Packaging format (Tape & Reel vs. Cut Tape & Digi-Reel) affects supply chain logistics and handling but does not impact electrical or mechanical compatibility. The SOT-23-3 package footprint and pin configuration remain identical across all three parts.

Q: What is the operating temperature range for each part?

A: CDBT-54S-HF is rated to 125°C junction temperature maximum. BAT54-7-F operates from -65°C to 150°C. BAT54A,235 is rated to 150°C maximum. All parts are suitable for standard industrial temperature ranges (0°C to 70°C ambient).