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CDBV120-G Schottky Diode 20V 1A SOD-323 Equivalent & Substitute Parts
Part Overview
The CDBV120-G is a Schottky rectifier diode manufactured by Comchip Technology, rated for 20V DC reverse voltage and 1A average rectified current in a surface mount SOD-323 package. This component is classified as obsolete, which necessitates identification of active equivalent and substitute parts for ongoing design support and procurement continuity. Schottky diodes in this voltage and current class are widely used in power supply circuits, signal clamping applications, and reverse polarity protection where fast recovery characteristics and low forward voltage drop are required.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - DC Reverse (Vr) Maximum | 20 | V |
| Current - Average Rectified (Io) | 1 | A |
| Voltage - Forward (Vf) Maximum @ If | 450 mV @ 1 A | mV |
| Speed - Fast Recovery | ≤ 500ns, > 200mA (Io) | ns |
| Current - Reverse Leakage @ Vr | 1 | mA @ 20 V |
| Capacitance @ Vr, F | 120 | pF @ 4V, 1MHz |
| Mounting Type | Surface Mount | — |
| Package / Case | SC-76, SOD-323 | — |
| Technology | Schottky | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitution of the CDBV120-G is determined by strict equivalence across the following electrical and mechanical parameters:
Primary Substitution Criteria:
- Voltage - DC Reverse (Vr) Maximum: 20V
- Current - Average Rectified (Io): 1A
- Package / Case: SC-76, SOD-323
- Technology: Schottky
- Mounting Type: Surface Mount
- Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
Secondary Compatibility Parameters:
- Voltage - Forward (Vf) Maximum @ If: 450 mV @ 1 A (tolerance range acceptable)
- Current - Reverse Leakage @ Vr: 1 mA @ 20 V (tolerance range acceptable)
- Capacitance @ Vr, F: 120pF @ 4V, 1MHz (tolerance range acceptable)
Substitute parts are classified into two categories:
Category A - Full Electrical and Mechanical Equivalents (1A rated): Parts meeting all primary criteria with identical or superior electrical performance at rated current.
Category B - Functional Substitutes with Parameter Variations (500mA rated): Parts with reduced current rating (500mA vs. 1A) suitable only for applications where circuit current demand does not exceed 500mA maximum.
Parameter Comparison
| Part Number | Manufacturer | Vr (Max) V | Io A | Vf (Max) mV | Reverse Leakage µA/mA | Capacitance pF | Package | Product Status |
|---|---|---|---|---|---|---|---|---|
| CDBV120-G | Comchip Technology | 20 | 1 | 450 @ 1A | 1 mA @ 20V | 120 @ 4V | SOD-323 | Obsolete |
| CDBV120-HF | Comchip Technology | 20 | 1 | 450 @ 1A | 1 mA @ 20V | 120 @ 4V | SOD-323 | Active |
| B5817WS-TP | Micro Commercial Co | 20 | 1 | 450 @ 1A | 1 mA @ 20V | 120 @ 4V | SOD-323 | Active |
| BAT760,115 | Nexperia USA Inc. | 20 | 1 | 550 @ 1A | 50 µA @ 15V | 25 @ 5V | SOD-323 | Active |
| NSR0320MW2T1G | onsemi | 20 | 1 | 500 @ 900mA | 50 µA @ 15V | 29 @ 5V | SOD-323 | Active |
| NSR0320MW2T3G | onsemi | 20 | 1 | 500 @ 900mA | 50 µA @ 15V | 29 @ 5V | SOD-323 | Active |
| NSRLV20MW2T1G | onsemi | 20 | 1 | 500 @ 900mA | 50 µA @ 15V | 29 @ 5V | SOD-323 | Active |
| NSVR0320MW2T1G | onsemi | 20 | 1 | 500 @ 900mA | 50 µA @ 15V | 29 @ 5V | SOD-323 | Active |
| PMEG2010BEA,115 | Nexperia USA Inc. | 20 | 1 | 500 @ 1A | 200 µA @ 20V | 80 @ 1V | SOD-323 | Active |
| B0520WS-7-F | Diodes Incorporated | 20 | 0.5 | 430 @ 500mA | 250 µA @ 20V | 58 @ 0V | SOD-323 | Active |
| PMEG2005AEA,115 | Nexperia USA Inc. | 20 | 0.5 | 390 @ 500mA | 200 µA @ 20V | 80 @ 1V | SOD-323 | Active |
Engineering Selection Recommendations
Primary Recommendation - Direct Equivalent:
CDBV120-HF (Comchip Technology) is the direct active equivalent to CDBV120-G. This part maintains identical electrical specifications and packaging, with the same manufacturer providing design continuity. Product status is active with substantial inventory availability (1,457,400 units). RoHS3 compliance and MSL-1 rating are maintained.
Secondary Recommendations - Full 1A Rated Equivalents:
B5817WS-TP (Micro Commercial Co) provides full electrical equivalence with 1A current rating, identical forward voltage at rated current, and active product status. This part is suitable for direct substitution in all applications where CDBV120-G was specified.
PMEG2010BEA,115 (Nexperia USA Inc.) meets all primary electrical criteria with 1A rating. This part includes AEC-Q100 automotive qualification and extended operating temperature range (-65°C to 150°C), making it suitable for automotive and high-reliability applications. Reverse leakage is specified at 200 µA @ 20V, which is within acceptable tolerance for most applications.
NSR0320MW2T1G, NSR0320MW2T3G, NSRLV20MW2T1G, and NSVR0320MW2T1G (onsemi) all provide 1A current rating with 20V reverse voltage in SOD-323 packaging. Forward voltage is specified at 500 mV @ 900mA, which is acceptable for 1A operation. These parts are available in active status with good inventory levels.
BAT760,115 (Nexperia USA Inc.) meets voltage and current ratings with 1A capability. Forward voltage is specified at 550 mV @ 1A, which represents a 100 mV increase over the original specification. This part is suitable for applications where forward voltage drop is not a critical design parameter.
Reduced Current Alternatives - 500mA Rated:
B0520WS-7-F (Diodes Incorporated) and PMEG2005AEA,115 (Nexperia USA Inc.) are rated for 500mA maximum current. These parts are suitable only for applications where circuit current demand does not exceed 500mA. Both parts are active with good inventory availability.
Compliance and Certification Status:
All recommended substitute parts maintain ROHS3 compliance and MSL-1 (Unlimited) moisture sensitivity rating, consistent with the original CDBV120-G specification. All parts carry EAR99 ECCN classification.
Frequently Asked Questions (FAQ)
Q: Can CDBV120-HF be used as a direct replacement for CDBV120-G?
A: Yes. CDBV120-HF is the active equivalent manufactured by the same supplier (Comchip Technology) with identical electrical specifications, package type (SOD-323), and compliance ratings. The primary difference is product status (active vs. obsolete) and packaging format availability.
Q: What is the difference between the 1A-rated and 500mA-rated substitutes?
A: The 1A-rated parts (CDBV120-HF, B5817WS-TP, PMEG2010BEA,115, onsemi NSR/NSRLV/NSVR series) are electrically equivalent to the original CDBV120-G and suitable for all applications. The 500mA-rated parts (B0520WS-7-F, PMEG2005AEA,115) have reduced current capacity and must only be used in circuits where maximum current does not exceed 500mA.
Q: Are there differences in forward voltage drop between substitutes?
A: Yes. Forward voltage varies across substitutes: CDBV120-G and CDBV120-HF specify 450 mV @ 1A; onsemi parts specify 500 mV @ 900mA; BAT760,115 specifies 550 mV @ 1A; PMEG2010BEA,115 specifies 500 mV @ 1A; PMEG2005AEA,115 specifies 390 mV @ 500mA; B0520WS-7-F specifies 430 mV @ 500mA. Applications sensitive to forward voltage drop should verify compatibility with the selected substitute.
Q: What is the significance of reverse leakage current differences?
A: Reverse leakage current affects power dissipation and circuit performance in high-impedance applications. CDBV120-G specifies 1 mA @ 20V. Substitutes with lower reverse leakage (50 µA @ 15V for onsemi and BAT760,115; 200 µA @ 20V for PMEG series) may provide improved performance in sensitive circuits. Substitutes with higher leakage (250 µA @ 20V for B0520WS-7-F) are acceptable for most standard applications.
Q: Can I use PMEG2010BEA,115 in automotive applications?
A: Yes. PMEG2010BEA,115 carries AEC-Q100 automotive qualification and is rated for -65°C to 150°C operating temperature, making it suitable for automotive and high-reliability applications. Other substitutes do not carry automotive qualification.
Q: What packaging formats are available for these substitutes?
A: CDBV120-HF is available in Tape & Reel (TR) format. B5817WS-TP is available in Tape & Reel (TR). BAT760,115 is available in Tape & Reel (TR). NSR0320MW2T1G and NSVR0320MW2T1G are available in Cut Tape (CT) & Digi-Reel format. NSR0320MW2T3G is available in Tape & Reel (TR). NSRLV20MW2T1G packaging is not specified. PMEG2010BEA,115 and PMEG2005AEA,115 are available in Tape & Reel (TR). B0520WS-7-F is available in Cut Tape (CT) & Digi-Reel format. Verify packaging compatibility with your assembly process requirements.
Q: Are all substitutes RoHS3 compliant?
A: Yes. All recommended substitute parts maintain ROHS3 compliance, consistent with the original CDBV120-G specification.
Q: What is the difference between NSR0320MW2T1G and NSR0320MW2T3G?
A: Both parts are manufactured by onsemi with identical electrical specifications (20V, 1A, SOD-323). The primary difference is packaging format: NSR0320MW2T1G is available in Cut Tape (CT) & Digi-Reel format, while NSR0320MW2T3G is available in Tape & Reel (TR) format. Electrical performance is equivalent.
Q: Can I substitute a 500mA part in a circuit designed for 1A?
A: No. Using a 500mA-rated part (B0520WS-7-F or PMEG2005AEA,115) in a circuit requiring 1A operation will result in device overstress and potential failure. These parts are suitable only for applications where maximum circuit current does not exceed 500mA.
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