CDBC340LR-HF Schottky Diode Equivalent & Substitute Parts

Part Overview

The CDBC340LR-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 and rapid switching characteristics. Equivalent and substitute parts are identified to provide design flexibility, supply chain alternatives, and procurement options while maintaining electrical and mechanical compatibility within specified parameter tolerances.

Substiute Parts

CDBC340LR-HF

Comchip TechnologyIn Stock: 1100CDBC340LR-HF Datasheet

Current PartRFQ

B340-13-F

Diodes IncorporatedIn Stock: 51481B340-13-F Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDBC340LR-HF is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Criteria:

• Voltage - DC Reverse (Vr) (Max): 40V
• Current - Average Rectified (Io): 3A
• Technology: Schottky
• Package / Case: DO-214AB, SMC (surface mount)
• Mounting Type: Surface Mount

Allowable Parameter Variations: Substitute parts may exhibit minor variations in forward voltage (Vf), reverse leakage current, junction capacitance, and operating temperature range, provided these variations remain within acceptable engineering tolerances for the application and do not degrade circuit performance.

The B340-13-F from Diodes Incorporated qualifies as a direct substitute based on matching voltage rating, current rating, Schottky technology, and DO-214AB SMC package configuration.

Parameter Comparison

Engineering Selection Recommendations

CDBC340LR-HF (Primary Part):

• Active product status with 1085 pcs in stock
• ROHS3 compliant and MSL 1 rated
• Operating temperature range: -50°C to 150°C
• Forward voltage: 450 mV @ 3A (lower dissipation profile)

B340-13-F (Substitute Part):

• Active product status with 51465 pcs in stock
• ROHS3 compliant and MSL 1 rated
• Operating temperature range: -55°C to 125°C
• Forward voltage: 500 mV @ 3A (50 mV higher than primary)
• Lower junction capacitance: 200 pF vs. 250 pF

Both parts meet identical voltage and current specifications, fast recovery speed requirements, and regulatory compliance standards. Selection between these parts should be based on application thermal requirements, available inventory, and acceptable forward voltage drop characteristics for the specific circuit design.

Frequently Asked Questions (FAQ)

Q: Can B340-13-F replace CDBC340LR-HF in all applications?

A: B340-13-F is electrically and mechanically compatible as a substitute. Both parts share identical 40V reverse voltage rating, 3A current rating, Schottky technology, and DO-214AB SMC package. The 50 mV difference in forward voltage (B340-13-F: 500 mV vs. CDBC340LR-HF: 450 mV @ 3A) must be evaluated for thermal and efficiency impact in the specific application circuit.

Q: What are the package compatibility considerations?

A: Both parts use the DO-214AB (SMC) surface mount package. CDBC340LR-HF is supplied in Tape & Reel (TR) format, while B340-13-F is available in Cut Tape (CT) and Digi-Reel® formats. PCB footprint and reflow soldering parameters remain identical; packaging format affects only procurement and assembly handling.

Q: Are there temperature range differences that affect substitution?

A: CDBC340LR-HF operates from -50°C to 150°C junction temperature, while B340-13-F operates from -55°C to 125°C. For applications requiring operation above 125°C, CDBC340LR-HF is the required choice. For standard industrial applications within -55°C to 125°C, both parts are suitable.

Q: Do both parts meet the same regulatory and compliance standards?

A: Yes. Both CDBC340LR-HF and B340-13-F are ROHS3 compliant, carry MSL 1 (Unlimited) moisture sensitivity rating, and share identical ECCN (EAR99) and HTSUS (8541.10.0080) classifications.

Q: What is the significance of the capacitance difference?

A: CDBC340LR-HF has 250 pF junction capacitance while B340-13-F has 200 pF at 4V, 1MHz. This 50 pF difference may affect high-frequency switching performance and EMI characteristics in sensitive applications. Verify capacitance specifications against circuit design requirements before substitution in RF or high-speed switching applications.