CDBA120SL-HF Equivalent & Substitute Parts

Part Overview

The CDBA120SL-HF is a Schottky rectifier diode manufactured by Comchip Technology, rated for 20 V DC reverse voltage and 1 A average rectified current in a DO-214AC (SMA) surface mount package. The part is classified as obsolete, necessitating identification of active equivalent and substitute components for new designs and production continuity. Substitute parts must maintain electrical compatibility within the specified parameter ranges while offering active product status and improved availability.

Key Parameters

Parameter	Value	Unit
Technology	Schottky	—
Voltage - DC Reverse (Vr) (Max)	20	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	330 mV @ 1 A	—
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	1 mA @ 20 V	—
Mounting Type	Surface Mount	—
Package / Case	DO-214AC, SMA	—
Operating Temperature - Junction	-50°C to 100°C	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the CDBA120SL-HF is determined by the following critical parameters:

Electrical Compatibility Requirements:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 20 V
Current - Average Rectified (Io): Must equal or exceed 1 A
Technology: Schottky diode
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Mechanical Compatibility Requirements:

Mounting Type: Surface Mount
Package / Case: DO-214AC (SMA) or equivalent footprint
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts are grouped into two categories:

Category 1: Direct Electrical Equivalents (20 V, 1 A) Parts with identical or superior voltage and current ratings, matching the original electrical specifications. These include B120-13-F, B120-E3/5AT, B120-E3/61T, B120-M3/5AT, B120-M3/61T, B120Q-13-F, CD1607-B120LLF, MBRA120ET3G, and SD2010S020S1R0.

Category 2: Higher Voltage Rating (40 V, 1.4 A) CDBA140SL-HF provides superior voltage and current ratings, suitable for applications requiring higher safety margins or operating in elevated voltage environments.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ 1A [mV]	Reverse Leakage @ Vr [µA/mA]	Package	Product Status	RoHS Status
CDBA120SL-HF	Comchip Technology	20	1	330	1 mA @ 20V	DO-214AC (SMA)	Obsolete	—
CDBA140SL-HF	Comchip Technology	40	1.4	330	1 mA @ 40V	DO-214AC (SMA)	Active	ROHS3 Compliant
B120-13-F	Diodes Incorporated	20	1	500	500 µA @ 20V	DO-214AC (SMA)	Active	ROHS3 Compliant
B120-E3/5AT	Vishay General Semiconductor - Diodes Division	20	1	520	200 µA @ 20V	DO-214AC (SMA)	Active	ROHS3 Compliant
B120-E3/61T	Vishay General Semiconductor - Diodes Division	20	1	520	200 µA @ 20V	DO-214AC (SMA)	Active	ROHS3 Compliant
B120-M3/5AT	Vishay General Semiconductor - Diodes Division	20	1	520	200 µA @ 20V	DO-214AC (SMA)	Active	ROHS3 Compliant
B120-M3/61T	Vishay General Semiconductor - Diodes Division	20	1	520	200 µA @ 20V	DO-214AC (SMA)	Active	ROHS3 Compliant
B120Q-13-F	Diodes Incorporated	20	1	500	500 µA @ 20V	DO-214AC (SMA)	Active	ROHS3 Compliant
CD1607-B120LLF	Bourns Inc.	20	1	380	1 mA @ 20V	SOD-123T (2-Mini-SMA)	Active	ROHS3 Compliant
MBRA120ET3G	onsemi	20	1	530	10 µA @ 20V	DO-214AC (SMA)	Active	ROHS3 Compliant
SD2010S020S1R0	KYOCERA AVX	20	1	500	200 µA @ 20V	2-SMD, No Lead (2010/DO-214AC)	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Specifications):

Select from B120-13-F, B120-E3/5AT, B120-E3/61T, B120-M3/5AT, B120-M3/61T, B120Q-13-F, MBRA120ET3G, or SD2010S020S1R0. All are active products with ROHS3 compliance. B120Q-13-F includes AEC-Q101 automotive qualification. Forward voltage (Vf) ranges from 500 mV to 530 mV, which is higher than the original 330 mV specification but remains within acceptable operating parameters for most applications. Reverse leakage varies from 10 µA to 500 µA, all acceptable for standard rectification applications.

For Enhanced Performance (Higher Voltage Rating):

CDBA140SL-HF provides 40 V reverse voltage rating and 1.4 A current capacity with identical forward voltage (330 mV @ 1 A) to the original part. This option is suitable for applications requiring higher voltage margins or future design flexibility. Product status is active with ROHS3 compliance and high inventory availability (318,997 pcs).

Package Considerations:

CD1607-B120LLF uses SOD-123T (2-Mini-SMA) package, which differs from the standard DO-214AC (SMA) footprint. This part is suitable only if PCB layout accommodates the alternative package. SD2010S020S1R0 uses 2-SMD No Lead package, also requiring PCB compatibility verification.

Compliance and Availability:

All recommended substitutes are active products with ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating. Inventory availability ranges from 799 pcs to 318,997 pcs, ensuring supply chain continuity.

Frequently Asked Questions (FAQ)

Q1: Can CDBA140SL-HF replace CDBA120SL-HF in all applications?

CDBA140SL-HF is electrically compatible as a substitute. It provides higher voltage (40 V vs. 20 V) and current (1.4 A vs. 1 A) ratings with identical forward voltage (330 mV @ 1 A). Applications operating at or below 20 V and 1 A will function correctly with CDBA140SL-HF. Higher voltage rating provides additional safety margin but does not degrade performance in lower-voltage circuits.

Q2: What is the significance of forward voltage (Vf) differences among substitutes?

Forward voltage ranges from 330 mV (original and CDBA140SL-HF) to 530 mV (MBRA120ET3G). Higher Vf increases power dissipation in the diode. For 1 A applications, the difference translates to approximately 0.2 W additional dissipation at maximum Vf. Circuit thermal design must accommodate this variation. Lower Vf options (B120-13-F at 500 mV, CD1607-B120LLF at 380 mV) reduce dissipation.

Q3: Are package differences between DO-214AC (SMA) and SOD-123T (2-Mini-SMA) significant?

Yes. CD1607-B120LLF uses SOD-123T package, which has different footprint dimensions than DO-214AC (SMA). Direct PCB substitution is not possible without layout modification. Verify PCB pad layout compatibility before selecting this part.

Q4: What does AEC-Q101 qualification indicate for B120Q-13-F?

AEC-Q101 qualification indicates the part meets automotive industry reliability and quality standards. B120Q-13-F is suitable for automotive applications requiring this certification. Non-automotive applications do not require this qualification but may benefit from the enhanced reliability testing.

Q5: How do reverse leakage specifications affect circuit performance?

Reverse leakage ranges from 10 µA (MBRA120ET3G) to 1 mA (CDBA120SL-HF and CD1607-B120LLF). In most rectification applications, this variation is negligible. High-impedance circuits or precision analog applications may require lower leakage options. Standard power supply and switching applications tolerate the full range.

Q6: Can substitutes with higher current ratings (1.4 A for CDBA140SL-HF) be used in 1 A circuits?

Yes. Higher current rating indicates greater thermal capacity and lower junction temperature rise at rated current. Using a 1.4 A diode in a 1 A application improves thermal performance and reliability margin without adverse effects.

Q7: What is the impact of operating temperature range differences?

Original CDBA120SL-HF operates from -50°C to 100°C. Most substitutes extend this to -55°C to 125°C or -65°C to 150°C. Extended temperature range provides design flexibility for harsh environments but is not required for standard industrial applications. Verify application temperature requirements before selection.

Q8: Are all substitutes ROHS3 compliant?

All active substitute parts listed are ROHS3 compliant. The original CDBA120SL-HF compliance status is not specified. ROHS3 compliance is mandatory for most commercial and industrial applications in regulated markets.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message