CDBC320-G Schottky Diode Equivalent & Substitute Parts

Part Overview

The CDBC320-G is a 20V, 3A Schottky rectifier diode manufactured by Comchip Technology in DO-214AB (SMC) surface mount package. This component 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, maintenance applications, and design transitions to active alternatives that maintain electrical and mechanical compatibility.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	20	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	500 mV @ 3 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	500 µA @ 20 V	µA
Mounting Type	Surface Mount	—
Package / Case	DO-214AB, SMC	—
Operating Temperature - Junction (Max)	125	°C
Technology	Schottky	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the CDBC320-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): 3 A
Technology: Schottky
Mounting Type: Surface Mount
Package / Case: DO-214AB or compatible surface mount package (SMC, SMA)
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Acceptable Variation Ranges:

Voltage - Forward (Vf) (Max) @ If: 450–500 mV @ 3 A
Current - Reverse Leakage @ Vr: 500 µA to 1.5 mA @ 20 V
Operating Temperature - Junction: Minimum -55°C to -50°C; Maximum 125°C to 150°C
Capacitance @ Vr, F: Variation permitted where specified

All substitute parts listed maintain the core electrical ratings and surface mount form factor required for direct functional replacement in applications designed for the CDBC320-G.

Parameter Comparison

Parameter	CDBC320-G (Main)	CDBC320-HF	5820SMJ/TR13	B320-13-F	SS32
Manufacturer	Comchip Technology	Comchip Technology	Microchip Technology	Diodes Incorporated	MDD
Voltage - DC Reverse (Vr) (Max)	20 V	20 V	20 V	20 V	20 V
Current - Average Rectified (Io)	3 A	3 A	3 A	3 A	3 A
Voltage - Forward (Vf) (Max) @ If	500 mV @ 3 A	450 mV @ 3 A	460 mV @ 3 A	500 mV @ 3 A	—
Speed	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA
Current - Reverse Leakage @ Vr	500 µA @ 20 V	500 µA @ 20 V	1.5 mA @ 20 V	500 µA @ 20 V	500 µA @ 20 V
Capacitance @ Vr, F	—	250 pF @ 4V, 1MHz	—	200 pF @ 4V, 1MHz	500 pF @ 4V, 1MHz
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	DO-214AB, SMC	DO-214AB, SMC	DO-214AB	DO-214AB, SMC	DO-214AC, SMA
Operating Temperature - Junction	125°C (Max)	-50°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 125°C	-55°C ~ 125°C
Product Status	Not For New Designs	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

CDBC320-HF (Comchip Technology)

The CDBC320-HF is the primary direct substitute for the CDBC320-G. Both components are manufactured by Comchip Technology and share identical electrical ratings (20V, 3A Schottky). The CDBC320-HF offers improved forward voltage performance (450 mV vs. 500 mV @ 3 A) and an extended operating temperature range (-50°C to 150°C vs. 125°C maximum). The component is Active status and ROHS3 compliant. Packaging is available in Cut Tape (CT) and Digi-Reel® formats. This part is recommended for new production and design transitions.

B320-13-F (Diodes Incorporated)

The B320-13-F is a functionally equivalent Schottky diode rated 20V, 3A in DO-214AB/SMC package. It maintains identical forward voltage (500 mV @ 3 A) and reverse leakage (500 µA @ 20 V) specifications to the CDBC320-G. The component is Active status and ROHS3 compliant with an operating temperature range of -55°C to 125°C. High inventory availability (32,400 pcs) supports production continuity. This part is suitable for direct replacement in existing designs.

5820SMJ/TR13 (Microchip Technology)

The 5820SMJ/TR13 meets all core electrical requirements (20V, 3A Schottky, Fast Recovery). Forward voltage is 460 mV @ 3 A, within acceptable variation. However, this component is RoHS non-compliant and exhibits higher reverse leakage (1.5 mA @ 20 V) compared to the main part. Selection of this part requires verification of RoHS compliance requirements for the end application. Inventory is limited (699 pcs).

SS32 (MDD)

The SS32 is a 20V, 3A Schottky diode in SMA package (DO-214AC). While electrically equivalent, the package differs from the DO-214AB/SMC of the main part. The SMA package is physically smaller and may require PCB layout modifications. This part is ROHS3 compliant and Active status. Selection requires confirmation of mechanical compatibility with existing PCB designs. High inventory (19,566 pcs) is available.

Frequently Asked Questions (FAQ)

Q: Can CDBC320-HF be used as a direct replacement for CDBC320-G without PCB modifications?

A: Yes. Both components use identical DO-214AB/SMC packages and share the same pinout and footprint. No PCB layout changes are required. The CDBC320-HF is the recommended substitute due to manufacturer continuity and improved electrical performance.

Q: What is the difference between DO-214AB (SMC) and DO-214AC (SMA) packages?

A: DO-214AB (SMC) and DO-214AC (SMA) are different surface mount package outlines with different physical dimensions and land patterns. The SS32 uses DO-214AC (SMA), which is smaller than DO-214AB (SMC). Direct PCB substitution is not possible without footprint redesign.

Q: Why is the 5820SMJ/TR13 listed as RoHS non-compliant?

A: The 5820SMJ/TR13 does not meet ROHS3 compliance standards. If your application or end market requires RoHS certification, this part is not suitable. Verify compliance requirements before selection.

Q: Are there differences in forward voltage between substitute parts?

A: Yes. Forward voltage varies: CDBC320-G and B320-13-F are 500 mV @ 3 A; CDBC320-HF is 450 mV @ 3 A; 5820SMJ/TR13 is 460 mV @ 3 A. These variations fall within acceptable ranges for Schottky diode applications but may affect power dissipation in high-current circuits. Verify thermal performance if forward voltage reduction is critical.

Q: What is the significance of reverse leakage current differences?

A: Reverse leakage current affects standby power consumption and circuit performance in high-impedance applications. The CDBC320-G, CDBC320-HF, B320-13-F, and SS32 all specify 500 µA @ 20 V. The 5820SMJ/TR13 specifies 1.5 mA @ 20 V, which is three times higher. For applications sensitive to leakage, the lower-leakage parts are preferred.

Q: Can I use SS32 in place of CDBC320-G if I redesign the PCB?

A: Electrically, yes. The SS32 meets all core electrical specifications (20V, 3A, Schottky, Fast Recovery). However, PCB redesign is required due to package differences (SMA vs. SMC). Evaluate the cost and schedule impact of redesign against the benefit of part availability before proceeding.

Q: Which substitute part has the best inventory availability?

A: B320-13-F has the highest inventory (32,400 pcs), followed by SS32 (19,566 pcs). CDBC320-HF has 1,313 pcs, and 5820SMJ/TR13 has 699 pcs. For production continuity, B320-13-F or SS32 are preferred if inventory is a constraint.

Q: Is CDBC320-HF suitable for new product designs?

A: Yes. CDBC320-HF is Active status and ROHS3 compliant, making it suitable for new designs. It offers improved electrical performance (lower forward voltage) and extended temperature range compared to the CDBC320-G. This is the recommended choice for new development.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message