CDBC340-HF Schottky Diode Equivalent & Substitute Parts

Part Overview

The CDBC340-HF is an active Schottky rectifier diode manufactured by Comchip Technology, rated for 40V DC reverse voltage and 3A average rectified current in a surface mount DO-214AB (SMC) package. This component is designed for fast recovery applications requiring low forward voltage drop characteristics. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained across the same package form factor, enabling direct replacement in circuit designs without functional degradation.

Substiute Parts

CDBC340-HF

Comchip TechnologyIn Stock: 1171CDBC340-HF Datasheet

Current PartRFQ

B340-13-F

Diodes IncorporatedIn Stock: 51481B340-13-F Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CDBC340-HF is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Requirements:

• Voltage - DC Reverse (Vr) (Max): 40 V minimum
• Current - Average Rectified (Io): 3 A minimum
• Voltage - Forward (Vf) (Max) @ If: 500 mV or lower @ 3 A
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
• Current - Reverse Leakage @ Vr: 500 µA or lower @ 40 V

Mechanical Compatibility Requirements:

• Package / Case: DO-214AB, SMC (surface mount)
• Mounting Type: Surface Mount

Compliance Requirements:

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts must satisfy all electrical parameters at or above the specified ratings and maintain identical package form factor and surface mount compatibility. Variations in capacitance within the specified range do not disqualify substitution when all other parameters are met.

Parameter Comparison

Engineering Selection Recommendations

B340-13-F (Diodes Incorporated) as Substitute for CDBC340-HF:

The B340-13-F meets all critical electrical substitution criteria. Both devices are Schottky rectifier diodes with identical voltage, current, and forward voltage specifications. Both are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings, confirming equivalent environmental and regulatory compliance.

The B340-13-F operates within a narrower junction temperature range (-55°C to 125°C) compared to the CDBC340-HF (-50°C to 150°C). This difference is acceptable for applications operating within the B340-13-F temperature envelope. The capacitance specification of the B340-13-F (200 pF @ 4V, 1MHz) is lower than the CDBC340-HF (250 pF @ 4V, 1MHz), which does not compromise substitution eligibility.

Both devices are packaged in DO-214AB (SMC) surface mount form factor with identical mechanical compatibility. Packaging format differs (Tape & Reel versus Cut Tape & Digi-Reel), which affects supply chain logistics but not electrical or mechanical performance.

Frequently Asked Questions (FAQ)

Q: Can B340-13-F replace CDBC340-HF in all applications?

A: B340-13-F is electrically equivalent to CDBC340-HF for all specified parameters. Substitution is valid provided the application operates within the B340-13-F junction temperature range of -55°C to 125°C. If your circuit requires operation above 125°C or below -55°C, verify compatibility with your specific thermal environment.

Q: What is the difference in capacitance between these parts?

A: CDBC340-HF specifies 250 pF @ 4V, 1MHz while B340-13-F specifies 200 pF @ 4V, 1MHz. The lower capacitance of B340-13-F does not affect substitution eligibility and may provide improved performance in high-frequency switching applications.

Q: Are the packages physically identical?

A: Both devices use the DO-214AB (SMC) surface mount package with identical mechanical dimensions and PCB footprint. Packaging format (Tape & Reel versus Cut Tape & Digi-Reel) refers to supply method, not physical package size.

Q: Do both parts meet the same compliance standards?

A: Yes. Both CDBC340-HF and B340-13-F are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity ratings. Regulatory and environmental compliance is equivalent.

Q: What happens if my application requires the full -50°C to 150°C temperature range?

A: B340-13-F operates only to 125°C maximum junction temperature. For applications requiring operation above 125°C, the CDBC340-HF must be retained. Verify your circuit's actual thermal requirements before substitution.

Q: Are there any electrical performance differences I should consider?

A: All critical electrical parameters are identical: 40V reverse voltage, 3A average rectified current, 500 mV forward voltage @ 3A, and 500 µA reverse leakage @ 40V. Both devices meet fast recovery specifications. Performance is equivalent for standard rectification applications.