CDBA240LR-HF Equivalent & Substitute Parts

Part Overview

The CDBA240LR-HF is a Schottky rectifier diode manufactured by Comchip Technology, rated for 40 V DC reverse voltage and 2 A average rectified current in a surface mount DO-214AC (SMA) package. This component is classified as Active product status and is RoHS3 compliant. Substitute parts are identified when equivalent electrical performance can be achieved within the specified parameter ranges while maintaining package compatibility and compliance requirements.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	40	V
Current - Average Rectified (Io)	2	A
Voltage - Forward (Vf) (Max) @ If	450 mV @ 2 A	mV
Current - Reverse Leakage @ Vr	500	µA @ 40 V
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Package / Case	DO-214AC, SMA	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-50°C ~ 150°C	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution eligibility for the CDBA240LR-HF is determined by the following criteria:

Mandatory Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 40 V
Package / Case: DO-214AC, SMA
Mounting Type: Surface Mount
Technology: Schottky
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
RoHS Status: ROHS3 Compliant

Allowable Variation Parameters:

Current - Average Rectified (Io): Substitute must equal or exceed 2 A
Voltage - Forward (Vf) (Max) @ If: Substitute must not exceed the forward voltage of the main part at equivalent current levels
Current - Reverse Leakage @ Vr: Substitute must not exceed 500 µA @ 40 V
Operating Temperature - Junction: Substitute must cover the operating range or be suitable for the application environment

The identified substitute parts meet the mandatory matching criteria and operate within allowable variation ranges for the specified electrical parameters.

Parameter Comparison

Parameter	CDBA240LR-HF (Main)	B140-13-F	B140Q-13-F	VS-15MQ040-M3/5AT
Manufacturer	Comchip Technology	Diodes Incorporated	Diodes Incorporated	Vishay General Semiconductor - Diodes Division
Voltage - DC Reverse (Vr) (Max)	40 V	40 V	40 V	40 V
Current - Average Rectified (Io)	2 A	1 A	1 A	1.5 A
Voltage - Forward (Vf) (Max) @ If	450 mV @ 2 A	500 mV @ 1 A	500 mV @ 1 A	430 mV @ 1.5 A
Current - Reverse Leakage @ Vr	500 µA @ 40 V	500 µA @ 40 V	500 µA @ 40 V	500 µA @ 40 V
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Capacitance @ Vr, F	30 pF @ 4V, 1MHz	110 pF @ 4V, 1MHz	110 pF @ 4V, 1MHz	134 pF @ 10V, 1MHz
Package / Case	DO-214AC, SMA	DO-214AC, SMA	DO-214AC, SMA	DO-214AC, SMA
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Operating Temperature - Junction	-50°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C	-40°C ~ 150°C
Product Status	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Grade	—	—	Automotive	—
Qualification	—	—	AEC-Q101	—

Engineering Selection Recommendations

CDBA240LR-HF (Main Part): Active product status with full inventory availability (860 Pcs). Suitable for applications requiring 2 A rectified current capacity at 40 V reverse voltage. RoHS3 compliant and MSL 1 (Unlimited moisture sensitivity).

B140-13-F (Diodes Incorporated): Active product with high inventory availability (636,455 Pcs). Rated for 1 A average rectified current, which is below the main part specification. Forward voltage is 500 mV @ 1 A, compared to 450 mV @ 2 A for the main part. Operating temperature range extends to -65°C. This substitute is suitable only for applications where current requirements do not exceed 1 A.

B140Q-13-F (Diodes Incorporated): Active product with automotive grade qualification (AEC-Q101) and 40,400 Pcs inventory. Rated for 1 A average rectified current. Identical electrical specifications to B140-13-F with extended temperature range (-65°C ~ 150°C). This substitute is suitable for automotive applications requiring 1 A or less and meeting AEC-Q101 qualification requirements.

VS-15MQ040-M3/5AT (Vishay General Semiconductor - Diodes Division): Active product with 30,200 Pcs inventory. Rated for 1.5 A average rectified current, which is below the main part specification but higher than the Diodes Incorporated alternatives. Forward voltage is 430 mV @ 1.5 A, which is lower than the main part. Operating temperature range is -40°C ~ 150°C. This substitute is suitable for applications requiring 1.5 A or less and where lower forward voltage is beneficial.

All substitute parts maintain 40 V reverse voltage rating, DO-214AC (SMA) package compatibility, fast recovery speed characteristics, and RoHS3 compliance. Selection should be based on actual application current requirements, which must not exceed the rated average rectified current of the chosen substitute.

Frequently Asked Questions (FAQ)

Q: Can B140-13-F be used as a direct replacement for CDBA240LR-HF?

A: B140-13-F is electrically compatible in terms of voltage rating and package, but is rated for 1 A average rectified current versus 2 A for the CDBA240LR-HF. Direct replacement is only suitable if the application current requirement does not exceed 1 A.

Q: What is the difference between B140-13-F and B140Q-13-F?

A: Both parts have identical electrical specifications (40 V, 1 A, 500 mV forward voltage). B140Q-13-F carries automotive grade qualification (AEC-Q101) and is suitable for automotive applications. B140-13-F is the standard industrial version.

Q: Why does VS-15MQ040-M3/5AT have lower forward voltage than the main part?

A: Forward voltage characteristics vary by manufacturer design and die technology. VS-15MQ040-M3/5AT exhibits 430 mV @ 1.5 A compared to 450 mV @ 2 A for CDBA240LR-HF. Lower forward voltage reduces power dissipation in the diode.

Q: Are all substitute parts available in the same packaging format?

A: All substitute parts use DO-214AC (SMA) surface mount package. CDBA240LR-HF is supplied in Tape & Reel (TR) format. B140-13-F and B140Q-13-F are supplied in Cut Tape (CT) & Digi-Reel® format. VS-15MQ040-M3/5AT is supplied in Tape & Reel (TR) format. Package format does not affect electrical compatibility.

Q: What is the impact of higher capacitance in substitute parts?

A: B140-13-F and B140Q-13-F exhibit 110 pF @ 4V, 1MHz compared to 30 pF @ 4V, 1MHz for the main part. VS-15MQ040-M3/5AT exhibits 134 pF @ 10V, 1MHz. Higher capacitance may affect high-frequency switching performance and should be evaluated in applications with switching frequencies above 1 MHz.

Q: Can substitute parts handle the full 2 A current rating of the main part?

A: No. B140-13-F and B140Q-13-F are rated for maximum 1 A. VS-15MQ040-M3/5AT is rated for maximum 1.5 A. Operating any substitute part above its rated average rectified current will result in excessive junction temperature and reduced component reliability.

Q: Are all parts RoHS3 compliant?

A: Yes. CDBA240LR-HF, B140-13-F, B140Q-13-F, and VS-15MQ040-M3/5AT are all RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level.

Q: What is the operating temperature difference between parts?

A: CDBA240LR-HF operates from -50°C to 150°C. B140-13-F and B140Q-13-F operate from -65°C to 150°C (5°C lower minimum). VS-15MQ040-M3/5AT operates from -40°C to 150°C (10°C higher minimum). Selection should match the application's thermal environment requirements.

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