CDBER43-HF Schottky Diode Equivalent & Substitute Parts

Part Overview

The CDBER43-HF is a 30V, 200mA Schottky rectifier diode manufactured by Comchip Technology in 0503/SOD-723F surface mount package. This part is classified as obsolete, necessitating identification of active equivalent alternatives for ongoing production and design requirements. Substitute parts must maintain electrical performance within the specified parameters while offering active product status and continued availability.

Substiute Parts

CDBER43-HF

Comchip TechnologyIn Stock: 1214CDBER43-HF Datasheet

Current PartRFQ

CDBUR43

Comchip TechnologyIn Stock: 1106CDBUR43 Datasheet

MFR RecommendedRFQ

CDBER42

Comchip TechnologyIn Stock: 1215CDBER42 Datasheet

Parametric EquivalentRFQ

CDBER43

Comchip TechnologyIn Stock: 852CDBER43 Datasheet

Parametric EquivalentRFQ

CDBER54

Comchip TechnologyIn Stock: 1088CDBER54 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following critical parameters: reverse voltage rating (Vr), average rectified current (Io), forward voltage (Vf), reverse recovery time (trr), and package compatibility. All substitute parts must maintain identical or superior electrical characteristics within the specified operating conditions.

Primary Substitution Criteria:

• Voltage - DC Reverse (Vr) (Max): 30 V (exact match required)
• Current - Average Rectified (Io): 200 mA (exact match required)
• Technology: Schottky (exact match required)
• Reverse Recovery Time (trr): 5 ns (exact match required)
• Operating Temperature - Junction: 125°C (exact match required)

Secondary Compatibility Factors:

• Mounting Type: Surface Mount (exact match required)
• RoHS3 Compliance: Required
• Moisture Sensitivity Level: 1 (Unlimited)

Substitute parts are categorized as follows:

Category A - MFR Recommended (Package Variant): CDBUR43 offers identical electrical specifications with package upgrade from 0503/SOD-723F to 0603/SOD-523F, providing improved thermal characteristics and handling.

Category B - Parametric Equivalents (Same Package): CDBER42, CDBER43, and CDBER54 maintain the 0503/SOD-723F package footprint with full electrical equivalence to the main part, with CDBER54 exhibiting higher reverse leakage characteristics.

Parameter Comparison

Engineering Selection Recommendations

For Direct PCB Footprint Compatibility (0503/SOD-723F Package):

CDBER42, CDBER43, and CDBER54 provide drop-in replacements maintaining identical package geometry and land pattern. CDBER42 and CDBER43 are preferred selections due to active product status and standard reverse leakage characteristics (500 nA @ 25 V). CDBER54 exhibits elevated reverse leakage (2 µA @ 25 V) and should be selected only when higher leakage tolerance is acceptable within circuit design parameters.

For Package Upgrade with Enhanced Thermal Performance:

CDBUR43 in 0603/SOD-523F package offers manufacturer-recommended substitution with identical electrical specifications. This package variant provides improved thermal dissipation and mechanical robustness. PCB layout modification is required to accommodate the larger 0603 footprint.

Compliance and Availability:

All substitute parts maintain ROHS3 compliance, REACH unaffected status, and unlimited moisture sensitivity rating (MSL 1). Active product status ensures continued availability and supply chain stability for CDBER42, CDBER43, CDBUR43, and CDBER54.

Frequently Asked Questions (FAQ)

Q: Can CDBUR43 replace CDBER43-HF without circuit modification?

A: CDBUR43 provides electrical equivalence with identical voltage, current, and switching characteristics. However, the package change from 0503/SOD-723F to 0603/SOD-523F requires PCB layout modification. No circuit schematic changes are necessary.

Q: What is the difference between CDBER42, CDBER43, and CDBER54?

A: CDBER42 and CDBER43 are parametric equivalents with identical specifications including reverse leakage (500 nA @ 25 V). CDBER54 maintains the same voltage and current ratings but exhibits higher reverse leakage (2 µA @ 25 V) and forward voltage specification at 100 mA rather than 200 mA. Selection depends on circuit leakage tolerance requirements.

Q: Is the CDBER43-HF obsolete status critical for new designs?

A: Yes. The obsolete status indicates discontinued manufacturing and limited remaining inventory (1133 Pcs). New designs should specify active alternatives: CDBER42, CDBER43, CDBUR43, or CDBER54 to ensure long-term supply availability and manufacturing continuity.

Q: Are all substitute parts RoHS3 compliant?

A: All substitute parts listed maintain ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements for commercial and industrial applications.

Q: What is the primary advantage of selecting CDBUR43 over same-package alternatives?

A: CDBUR43 in 0603/SOD-523F package provides improved thermal dissipation characteristics compared to the smaller 0503/SOD-723F package, beneficial for applications with elevated ambient temperatures or higher power density requirements. Electrical performance remains identical.

Q: Can CDBER54 be used in all applications where CDBER43-HF is specified?

A: CDBER54 maintains voltage, current, and switching speed equivalence. However, the higher reverse leakage (2 µA @ 25 V versus 500 nA @ 25 V) may impact circuit performance in applications sensitive to leakage current. Circuit analysis is required to confirm compatibility.