CDBA120-G Schottky Diode 20V 1A DO-214AC Equivalent & Substitute Parts

Part Overview

The CDBA120-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 DO-214AC (SMA) package. This component is classified as obsolete product status. Due to obsolescence, equivalent and substitute parts from active manufacturers are necessary for ongoing design support, production continuity, and long-term component availability.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	20 V
Current - Average Rectified (Io)	1 A
Voltage - Forward (Vf) (Max) @ If	500 mV @ 1 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	500 µA @ 20 V
Package / Case	DO-214AC, SMA
Mounting Type	Surface Mount
Operating Temperature - Junction	-65°C ~ 125°C
Technology	Schottky
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the CDBA120-G is determined by the following electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 20 V minimum
Current - Average Rectified (Io): 1 A minimum
Voltage - Forward (Vf) (Max) @ If: 500 mV to 520 mV @ 1 A
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
Package / Case: DO-214AC, SMA (surface mount)
Mounting Type: Surface Mount
Technology: Schottky

Substitution Categories:

Category 1: Direct Manufacturer Equivalents (Comchip Technology)

CDBA140-G and CDBA140-HF: Higher voltage rating (40V) with identical current and forward voltage specifications. These parts are pin-compatible and functionally superior for applications requiring higher reverse voltage margin.

Category 2: Manufacturer Recommended Equivalents

B120-13-F (Diodes Incorporated): Identical electrical specifications with active product status and higher operating temperature range (-65°C ~ 150°C).
B120-E3/5AT and B120-E3/61T (Vishay General Semiconductor): Identical voltage and current ratings with forward voltage tolerance of 520 mV @ 1 A and lower reverse leakage (200 µA @ 20 V).

Category 3: Parametric Equivalents

SS12 series (Taiwan Semiconductor Corporation and Vishay General Semiconductor): Multiple variants (SS12-E3/5AT, SS12-E3/61T, SS12-M3/5AT, SS12-M3/61T) with identical electrical specifications and active product status. Forward voltage and reverse leakage specifications match or exceed CDBA120-G performance.

All substitute parts maintain DO-214AC (SMA) package compatibility, surface mount configuration, and Schottky technology classification.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ 1A	Reverse Leakage @ Vr	Temp Range (Tj)	Product Status	Packaging
CDBA120-G	Comchip Technology	20 V	1 A	500 mV	500 µA @ 20V	-65°C ~ 125°C	Obsolete	DO-214AC (SMA)
CDBA140-G	Comchip Technology	40 V	1 A	500 mV	500 µA @ 40V	-65°C ~ 125°C	Active	DO-214AC (SMA)
CDBA140-HF	Comchip Technology	40 V	1 A	500 mV	500 µA @ 40V	-50°C ~ 100°C	Active	DO-214AC (SMA)
B120-13-F	Diodes Incorporated	20 V	1 A	500 mV	500 µA @ 20V	-65°C ~ 150°C	Active	DO-214AC (SMA)
B120-E3/5AT	Vishay General Semiconductor	20 V	1 A	520 mV	200 µA @ 20V	-65°C ~ 125°C	Active	DO-214AC (SMA)
B120-E3/61T	Vishay General Semiconductor	20 V	1 A	520 mV	200 µA @ 20V	-65°C ~ 125°C	Active	DO-214AC (SMA)
SS12	Taiwan Semiconductor Corporation	20 V	1 A	500 mV	200 µA @ 20V	-55°C ~ 125°C	Active	DO-214AC (SMA)
SS12-E3/5AT	Vishay General Semiconductor	20 V	1 A	500 mV	200 µA @ 20V	-65°C ~ 125°C	Active	DO-214AC (SMA)
SS12-E3/61T	Vishay General Semiconductor	20 V	1 A	500 mV	200 µA @ 20V	-65°C ~ 125°C	Active	DO-214AC (SMA)
SS12-M3/5AT	Vishay General Semiconductor	20 V	1 A	500 mV	200 µA @ 20V	-65°C ~ 125°C	Active	DO-214AC (SMA)
SS12-M3/61T	Vishay General Semiconductor	20 V	1 A	500 mV	200 µA @ 20V	-65°C ~ 125°C	Active	DO-214AC (SMA)

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): Select B120-13-F, B120-E3/5AT, B120-E3/61T, SS12-E3/5AT, SS12-E3/61T, SS12-M3/5AT, or SS12-M3/61T. All parts maintain 20V reverse voltage, 1A current rating, and DO-214AC package compatibility. These parts carry active product status and ROHS3 compliance, ensuring long-term availability and regulatory conformance.

For Higher Voltage Margin Applications: Select CDBA140-G or CDBA140-HF for applications requiring 40V reverse voltage rating. Both parts maintain 1A current capacity and identical forward voltage characteristics. CDBA140-G supports the full -65°C ~ 125°C temperature range; CDBA140-HF operates within -50°C ~ 100°C.

Compliance Considerations: All substitute parts listed carry ROHS3 compliance and REACH Unaffected status, matching the regulatory profile of the original CDBA120-G. Moisture Sensitivity Level (MSL) is 1 (Unlimited) across all alternatives, indicating no special moisture handling requirements.

Inventory and Lead Time: B120-E3/61T (25,300 pcs), SS12-E3/61T (71,923 pcs), and SS12 (65,300 pcs) maintain the highest inventory levels, supporting immediate procurement requirements.

Frequently Asked Questions (FAQ)

Q: Can CDBA140-G or CDBA140-HF be used as direct replacements for CDBA120-G?

A: CDBA140-G and CDBA140-HF are functionally compatible substitutes with higher voltage ratings (40V vs. 20V). Both maintain identical 1A current capacity and 500 mV forward voltage at 1A. The higher voltage rating provides additional safety margin in applications. Pin configuration and package (DO-214AC) are identical. Temperature range differs: CDBA140-G supports -65°C ~ 125°C (matching CDBA120-G), while CDBA140-HF operates -50°C ~ 100°C.

Q: What is the difference between B120-E3/5AT and B120-E3/61T?

A: Both parts are electrically identical with 20V reverse voltage, 1A current, and 520 mV forward voltage at 1A. The difference is packaging: B120-E3/5AT is supplied in Tape & Reel (TR) format, while B120-E3/61T is supplied in Cut Tape (CT) format. Selection depends on assembly equipment and procurement requirements.

Q: Are SS12 series parts (Taiwan Semiconductor Corporation) equivalent to Vishay SS12 variants?

A: The Taiwan Semiconductor Corporation SS12 and Vishay General Semiconductor SS12 series (SS12-E3/5AT, SS12-E3/61T, SS12-M3/5AT, SS12-M3/61T) share identical electrical specifications: 20V reverse voltage, 1A current, 500 mV forward voltage, and DO-214AC package. Differences exist in packaging format (Cut Tape vs. Tape & Reel) and operating temperature range. Taiwan Semiconductor SS12 operates -55°C ~ 125°C; Vishay variants operate -65°C ~ 125°C.

Q: What does the forward voltage difference (500 mV vs. 520 mV) mean for circuit design?

A: Forward voltage specifications define the voltage drop across the diode at rated current (1A). CDBA120-G and most SS12 variants specify 500 mV maximum; B120-E3/5AT and B120-E3/61T specify 520 mV maximum. This 20 mV difference is within typical Schottky diode tolerance and does not affect circuit functionality in standard rectification applications. Both values are acceptable for power supply and protection circuit designs.

Q: Can I substitute parts with different packaging formats (Cut Tape vs. Tape & Reel)?

A: Yes, provided the electrical specifications and package type (DO-214AC) remain identical. Packaging format (CT vs. TR) affects procurement and assembly logistics but not electrical performance. Verify your assembly equipment compatibility with the selected packaging format before procurement.

Q: What is the significance of reverse leakage current differences (500 µA vs. 200 µA)?

A: Reverse leakage current specifies the small current flowing through the diode when reverse biased. Lower leakage (200 µA) indicates better diode quality and lower power dissipation in reverse bias conditions. B120 and SS12 series parts with 200 µA leakage offer superior performance compared to CDBA120-G at 500 µA. This difference is significant in precision analog circuits and low-power applications but negligible in standard rectification.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All active substitute parts listed (CDBA140-G, CDBA140-HF, B120-13-F, B120-E3/5AT, B120-E3/61T, and all SS12 variants) carry RoHS3 compliance certification. The original CDBA120-G does not specify RoHS status but carries REACH Unaffected designation. All substitutes maintain REACH Unaffected status.

Q: What is Moisture Sensitivity Level (MSL) 1, and does it affect handling?

A: MSL 1 (Unlimited) indicates the component has unlimited shelf life and requires no special moisture control during storage or handling. No baking or dry-pack requirements apply. All parts in this comparison carry MSL 1 classification.

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