CDBC520-G Equivalent & Substitute Parts Reference

Part Overview

The CDBC520-G is a Schottky rectifier diode manufactured by Comchip Technology, rated for 20 V DC reverse voltage and 5 A average rectified current in a DO-214AB (SMC) surface mount package. This part is classified as "Not For New Designs," indicating it has reached end-of-life status. Identifying equivalent and substitute parts is necessary for ongoing production support, field repairs, and design transitions to active alternatives that maintain electrical and mechanical compatibility.

Substiute Parts

CDBC520-G

Comchip TechnologyIn Stock: 5751CDBC520-G Datasheet

Current PartRFQ

CDBC520-HF

Comchip TechnologyIn Stock: 3060CDBC520-HF Datasheet

DirectRFQ

B520C-13-F

Diodes IncorporatedIn Stock: 32136B520C-13-F Datasheet

MFR RecommendedRFQ

SK52L-TP

Micro Commercial CoIn Stock: 3738SK52L-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDBC520-G is determined by strict equivalence in the following electrical and mechanical parameters:

Critical Matching Parameters:

• Voltage - DC Reverse (Vr) (Max): 20 V
• Current - Average Rectified (Io): 5 A
• Technology: Schottky
• Package / Case: DO-214AB, SMC
• Mounting Type: Surface Mount
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Allowable Variations:

• Voltage - Forward (Vf) (Max) @ If: Substitutes may vary within the range of 500–550 mV @ 5 A
• Current - Reverse Leakage @ Vr: Substitutes may range from 500 µA to 1 mA @ 20 V
• Operating Temperature - Junction: Substitutes may have extended ranges (e.g., -50°C to 175°C or -55°C to 150°C)
• Capacitance @ Vr, F: Substitutes may include this parameter with values between 200–380 pF @ 4V, 1MHz

All substitute parts listed maintain ROHS3 compliance, MSL 1 (Unlimited), and EAR99 export classification.

Parameter Comparison

Engineering Selection Recommendations

CDBC520-HF (Comchip Technology): This part is the direct equivalent from the same manufacturer and carries Active product status. It provides improved forward voltage performance (500 mV vs. 550 mV @ 5 A) and an extended operating temperature range (-50°C to 175°C vs. -40°C to 125°C). It includes capacitance specification (380 pF @ 4V, 1MHz). Selection of CDBC520-HF is appropriate for new production runs and design transitions, as it maintains full ROHS3 compliance and MSL 1 rating.

B520C-13-F (Diodes Incorporated): This part is manufactured by Diodes Incorporated and maintains Active product status. It matches the CDBC520-G in forward voltage (550 mV @ 5 A) and reverse leakage (500 µA @ 20 V). It offers the highest inventory availability (32,100 Pcs) and an extended operating temperature range (-55°C to 150°C). This part is suitable for applications requiring high component availability and long-term supply assurance. Full ROHS3 compliance and MSL 1 rating are maintained.

SK52L-TP (Micro Commercial Co): This part carries "Not For New Designs" status, similar to the CDBC520-G. While it maintains electrical equivalence in voltage and current ratings, it exhibits higher reverse leakage (1 mA vs. 500 µA @ 20 V) and lower capacitance (200 pF vs. 380 pF @ 4V, 1MHz). Selection of SK52L-TP is limited to field repairs and legacy system support where component continuity is required. ROHS3 compliance and MSL 1 rating are maintained.

Frequently Asked Questions (FAQ)

Q: Can CDBC520-HF be used as a direct replacement for CDBC520-G in existing designs?

A: Yes. CDBC520-HF meets all critical electrical parameters: 20 V reverse voltage, 5 A average rectified current, Schottky technology, and DO-214AB SMC package. The improved forward voltage (500 mV vs. 550 mV @ 5 A) and extended temperature range (-50°C to 175°C vs. -40°C to 125°C) provide enhanced performance margins. Active product status supports long-term availability.

Q: What is the primary difference between B520C-13-F and CDBC520-G?

A: B520C-13-F is manufactured by Diodes Incorporated rather than Comchip Technology. Both parts share identical voltage (20 V), current (5 A), forward voltage (550 mV @ 5 A), and reverse leakage (500 µA @ 20 V) specifications. B520C-13-F carries Active product status and offers significantly higher inventory (32,100 Pcs vs. 5,700 Pcs). The package designation differs slightly (SMC vs. DO-214AB, SMC), but both refer to the same physical form factor.

Q: Why does SK52L-TP show higher reverse leakage (1 mA vs. 500 µA)?

A: SK52L-TP exhibits reverse leakage of 1 mA @ 20 V, which is within acceptable tolerance for Schottky diode technology but represents a higher value than CDBC520-G and CDBC520-HF. This parameter variation is allowable for substitution purposes. Applications sensitive to leakage current should prioritize CDBC520-HF or B520C-13-F.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. CDBC520-G, CDBC520-HF, B520C-13-F, and SK52L-TP are all ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. All parts carry EAR99 export classification and are REACH unaffected.

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

A: B520C-13-F (Diodes Incorporated) offers the highest inventory level at 32,100 Pcs and carries Active product status, ensuring continued manufacturing and distribution support. CDBC520-HF (Comchip Technology) also carries Active status with 2,980 Pcs in stock.

Q: Can SK52L-TP be used in new designs?

A: No. SK52L-TP carries "Not For New Designs" status, identical to CDBC520-G. This classification indicates the part is in end-of-life phase. For new designs, CDBC520-HF or B520C-13-F are the recommended selections due to their Active product status.

Q: What is the significance of the capacitance parameter listed for substitute parts?

A: Capacitance @ Vr, F is provided for CDBC520-HF (380 pF), B520C-13-F (300 pF), and SK52L-TP (200 pF) at 4V and 1MHz. This parameter was not specified for CDBC520-G. Lower capacitance values (SK52L-TP at 200 pF) may provide advantages in high-frequency switching applications, while higher values (CDBC520-HF at 380 pF) are acceptable for standard rectification circuits.

Q: Do all parts use the same DO-214AB SMC package?

A: Yes. All parts—CDBC520-G, CDBC520-HF, B520C-13-F, and SK52L-TP—use the DO-214AB (SMC) surface mount package. This ensures mechanical and thermal compatibility in PCB layouts and assembly processes without modification.