CDBER70-HF Schottky Diode Equivalent & Substitute Parts

Part Overview

The CDBER70-HF is a Schottky rectifier diode manufactured by Comchip Technology, rated for 70V DC reverse voltage with 70mA average rectified current in a 0503 (1308 Metric) surface mount package. This component is classified as Obsolete, necessitating identification of equivalent and substitute parts for ongoing design support and procurement continuity. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts provide functional alternatives within the allowed parameter ranges for this diode category.

Substiute Parts

CDBER70-HF

Comchip TechnologyIn Stock: 803CDBER70-HF Datasheet

Current PartRFQ

CDBQR70-HF

Comchip TechnologyIn Stock: 251622CDBQR70-HF Datasheet

MFR RecommendedRFQ

CDBER70

Comchip TechnologyIn Stock: 1000CDBER70 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of Schottky diodes is determined by strict equivalence across electrical ratings and mechanical compatibility. The following criteria establish valid substitution:

Primary Equivalence Criteria:

• Voltage - DC Reverse (Vr) (Max): Must equal 70V
• Current - Average Rectified (Io): Must equal 70mA
• Voltage - Forward (Vf) (Max) @ If: Must equal 1V @ 15mA
• Reverse Recovery Time (trr): Must equal 5ns
• Current - Reverse Leakage @ Vr: Must equal 100nA @ 50V
• Capacitance @ Vr, F: Must equal 2pF @ 0V, 1MHz
• Technology: Must be Schottky
• Operating Temperature - Junction (Max): Must equal 125°C

Secondary Compatibility Criteria:

• Mounting Type: Surface Mount (required)
• RoHS Status: ROHS3 Compliant (required)
• Moisture Sensitivity Level (MSL): 1 (Unlimited) (required)

Package Considerations: Package differences (0503 vs. 0402) are permitted when all electrical parameters remain identical, provided PCB layout accommodates the alternative package footprint.

Parameter Comparison

Engineering Selection Recommendations

CDBER70 (Parametric Equivalent): CDBER70 is the primary equivalent for CDBER70-HF, maintaining identical electrical specifications and package form factor (0503/SOD-723F). The distinction between these parts is packaging format: CDBER70-HF is supplied in Cut Tape (CT) configuration, while CDBER70 is supplied in Tape & Reel (TR) configuration. CDBER70 carries Active product status, providing superior long-term availability compared to the Obsolete CDBER70-HF. This part is suitable for direct substitution without circuit redesign or PCB layout modification.

CDBQR70-HF (Functional Substitute): CDBQR70-HF provides complete electrical equivalence to CDBER70-HF across all specified parameters. The primary distinction is package size: CDBQR70-HF uses 0402 (1006 Metric) package versus the 0503 (1308 Metric) package of CDBER70-HF. CDBQR70-HF carries Last Time Buy status, indicating extended but finite availability. Selection of CDBQR70-HF requires PCB layout modification to accommodate the smaller 0402 footprint. This substitution is valid only when PCB design constraints permit package size reduction.

Compliance and Certification: All identified equivalents and substitutes maintain ROHS3 compliance, MSL Level 1 (Unlimited moisture sensitivity), and REACH Unaffected status, matching the regulatory profile of CDBER70-HF.

Frequently Asked Questions (FAQ)

Q: Can CDBER70 directly replace CDBER70-HF without circuit modification?

A: Yes. CDBER70 and CDBER70-HF are parametrically identical across all electrical specifications and package form factor (0503/SOD-723F). The only difference is packaging format (Tape & Reel versus Cut Tape). No circuit or PCB layout changes are required.

Q: What is the primary difference between CDBQR70-HF and CDBER70-HF?

A: Both parts are electrically identical Schottky diodes with 70V rating and 70mA current capacity. The difference is package size: CDBQR70-HF uses 0402 (1006 Metric) while CDBER70-HF uses 0503 (1308 Metric). CDBQR70-HF requires PCB layout redesign to accommodate the smaller footprint.

Q: Why is CDBER70-HF marked as Obsolete?

A: CDBER70-HF is classified as Obsolete by the manufacturer. CDBER70 (Active status) and CDBQR70-HF (Last Time Buy status) are recommended for new designs and ongoing procurement.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. CDBER70-HF, CDBER70, and CDBQR70-HF are all ROHS3 Compliant with MSL Level 1 (Unlimited) moisture sensitivity rating.

Q: Can CDBQR70-HF be used in existing PCBs designed for CDBER70-HF?

A: No. CDBQR70-HF uses a smaller 0402 package footprint compared to the 0503 footprint of CDBER70-HF. PCB layout modification is required. CDBER70 is the appropriate choice for direct PCB compatibility.

Q: What are the key electrical parameters that define substitution validity?

A: Substitution validity is determined by: Voltage - DC Reverse (70V), Current - Average Rectified (70mA), Voltage - Forward (1V @ 15mA), Reverse Recovery Time (5ns), Current - Reverse Leakage (100nA @ 50V), and Capacitance (2pF @ 0V, 1MHz). All identified substitutes maintain these specifications.

Q: Which substitute part offers the best long-term availability?

A: CDBER70 carries Active product status, indicating ongoing production and superior long-term availability. CDBQR70-HF is Last Time Buy, indicating limited future availability.