CDBA220LL-G Schottky Diode Equivalent & Substitute Parts

Part Overview

The CDBA220LL-G is a Schottky rectifier diode manufactured by Comchip Technology, rated for 20V DC reverse voltage and 2A average rectified current in a surface mount DO-214AC (SMA) package. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design support and procurement continuity. Substitute parts must maintain electrical compatibility within the specified voltage, current, and thermal operating parameters while accommodating available packaging options.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	20	V
Current - Average Rectified (Io)	2	A
Voltage - Forward (Vf) (Max) @ If	340 mV @ 2 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	1 mA @ 20 V	mA
Mounting Type	Surface Mount	—
Package / Case	DO-214AC, SMA	—
Operating Temperature - Junction (Max)	125	°C
Technology	Schottky	—
Product Status	Obsolete	—

Substitute Part Grouping Explanation

Substitution of the CDBA220LL-G is determined by strict adherence to the following electrical and mechanical criteria:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 20V
Current - Average Rectified (Io): Must equal or exceed 2A
Technology: Schottky rectifier diode
Mounting Type: Surface Mount
Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)

Package Compatibility Considerations:

DO-214AC (SMA) package is the primary form factor
DO-214AA (SMB) package represents a mechanical variant with different footprint dimensions but equivalent electrical performance in this application class

Substitute Parts Identified:

B220A-13-F (Diodes Incorporated) — Direct electrical equivalent with identical voltage and current ratings; active product status; SMA package
SS22S-E3/61T (Vishay General Semiconductor) — Electrical equivalent with identical voltage and current ratings; active product status; SMB package variant
CDBA240LL-HF (Comchip Technology) — Higher voltage rating (40V) with identical current rating; active product status; same manufacturer; SMA package

Parameter Comparison

Parameter	CDBA220LL-G (Main)	B220A-13-F	SS22S-E3/61T	CDBA240LL-HF
Manufacturer	Comchip Technology	Diodes Incorporated	Vishay General Semiconductor	Comchip Technology
Voltage - DC Reverse (Vr) (Max)	20 V	20 V	20 V	40 V
Current - Average Rectified (Io)	2 A	2 A	2 A	2 A
Voltage - Forward (Vf) (Max) @ If	340 mV @ 2 A	500 mV @ 2 A	550 mV @ 2 A	350 mV @ 2 A
Current - Reverse Leakage @ Vr	1 mA @ 20 V	500 µA @ 20 V	200 µA @ 20 V	1 mA @ 40 V
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Package / Case	DO-214AC, SMA	DO-214AC, SMA	DO-214AA, SMB	DO-214AC, SMA
Operating Temperature - Junction	125°C (Max)	-65°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 100°C
Product Status	Obsolete	Active	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

B220A-13-F (Diodes Incorporated) is the primary direct substitute for CDBA220LL-G. This part maintains identical voltage and current specifications, operates in the same SMA package, and holds active product status with ROHS3 compliance. The extended operating temperature range (-65°C to 150°C) provides superior thermal margin compared to the original part specification. Higher forward voltage drop (500 mV vs. 340 mV) must be evaluated for power dissipation impact in the target application.

SS22S-E3/61T (Vishay General Semiconductor) serves as an alternative substitute with identical electrical ratings and active product status. This part uses the DO-214AA (SMB) package, which requires PCB layout modification due to different footprint dimensions. Lower reverse leakage current (200 µA) and extended temperature range (-55°C to 150°C) offer performance advantages. Higher forward voltage drop (550 mV) increases power dissipation relative to the original specification.

CDBA240LL-HF (Comchip Technology) is a higher-voltage variant (40V rating) from the same manufacturer. This part is suitable for applications where voltage margin enhancement is beneficial. Identical current rating and SMA package compatibility enable direct footprint substitution. Active product status and ROHS3 compliance support long-term availability. Forward voltage drop (350 mV) closely matches the original part, minimizing power dissipation changes.

All substitute parts satisfy the mandatory substitution criteria: Schottky technology, fast recovery speed classification, surface mount configuration, and 2A current capacity. Selection should prioritize application-specific requirements for forward voltage drop, reverse leakage current, and thermal operating range.

Frequently Asked Questions (FAQ)

Q: Can B220A-13-F replace CDBA220LL-G in all applications?

A: B220A-13-F meets all mandatory electrical substitution criteria: 20V reverse voltage, 2A current rating, Schottky technology, and fast recovery speed. The SMA package is identical. However, the higher forward voltage drop (500 mV vs. 340 mV) increases power dissipation by approximately 47%. Verify that thermal design and power budget accommodate this increase. The extended operating temperature range provides additional design margin.

Q: Why does SS22S-E3/61T use a different package (SMB vs. SMA)?

A: SS22S-E3/61T uses the DO-214AA (SMB) package, which is physically larger than the DO-214AC (SMA) package. Both packages are surface mount configurations with equivalent electrical performance for this diode class. SMB package selection requires PCB layout redesign to accommodate the different footprint. Verify PCB space availability before selecting this substitute.

Q: Is CDBA240LL-HF a suitable substitute despite the higher voltage rating?

A: CDBA240LL-HF is electrically compatible as a substitute. The 40V reverse voltage rating exceeds the 20V requirement, providing additional voltage margin without compromising performance in 20V applications. Forward voltage drop (350 mV) is closer to the original specification than other substitutes, minimizing power dissipation changes. The SMA package enables direct footprint compatibility. Active product status and ROHS3 compliance support procurement continuity.

Q: What is the impact of reverse leakage current differences among substitutes?

A: The original CDBA220LL-G specifies 1 mA reverse leakage at 20V. B220A-13-F exhibits 500 µA (50% lower), and SS22S-E3/61T exhibits 200 µA (80% lower). Lower reverse leakage reduces standby power consumption and heat generation. For most applications, these differences are negligible. High-impedance or precision analog circuits may benefit from the lower leakage characteristics of B220A-13-F or SS22S-E3/61T.

Q: Are all substitute parts ROHS3 compliant?

A: B220A-13-F, SS22S-E3/61T, and CDBA240LL-HF are all ROHS3 compliant. The original CDBA220LL-G does not specify RoHS status. If RoHS compliance is a design requirement, all identified substitutes satisfy this criterion.

Q: What is the significance of the "Fast Recovery ≤ 500ns, > 200mA (Io)" speed classification?

A: This specification indicates that all parts, including substitutes, exhibit fast recovery time characteristics suitable for high-frequency switching applications. Recovery time remains ≤ 500 nanoseconds at forward currents exceeding 200 milliamps. This classification ensures compatibility in switching power supplies, DC-DC converters, and similar applications requiring rapid diode turn-off performance.

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