CDBA240L-G Schottky Diode 40V 2A DO-214AC Equivalent & Substitute Parts

Part Overview

The CDBA240L-G is a Schottky rectifier diode manufactured by Comchip Technology, rated for 40V reverse voltage and 2A average rectified current in a surface mount DO-214AC (SMA) package. This part is classified as "Not For New Designs," indicating it has reached end-of-life status. Identifying qualified substitute parts is necessary for ongoing production support, design revisions, and inventory management where the CDBA240L-G is no longer available from primary sources.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	40	V
Current - Average Rectified (Io)	2	A
Voltage - Forward (Vf) (Max) @ If	400	mV @ 2A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	1	mA @ 40V
Technology	Schottky	—
Mounting Type	Surface Mount	—
Package / Case	DO-214AC, SMA	—
Operating Temperature - Junction (Max)	125	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the CDBA240L-G is determined by strict equivalence in the following electrical and mechanical parameters:

Critical Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 40V
Current - Average Rectified (Io): 2A
Technology: Schottky
Package / Case: DO-214AC, SMA
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
Mounting Type: Surface Mount

Acceptable Variation Parameters:

Voltage - Forward (Vf) (Max) @ If: 400–550 mV @ 2A (within design margin for rectifier applications)
Current - Reverse Leakage @ Vr: 200 µA – 1 mA @ 40V (acceptable for low-leakage Schottky performance)
Operating Temperature - Junction: -55°C to -65°C minimum; 100°C to 150°C maximum (extended range acceptable)
Capacitance @ Vr, F: Not specified for main part; not a limiting factor for substitution

All substitute parts listed maintain identical reverse voltage, forward current rating, package form factor, and fast recovery speed characteristics. Differences in forward voltage drop and reverse leakage current remain within acceptable operating margins for standard rectifier circuit applications.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ 2A [mV]	Ir @ 40V [µA/mA]	Tj (Max) [°C]	Product Status	Packaging
CDBA240L-G	Comchip Technology	40	2	400	1 mA	125	Not For New Designs	Tape & Reel (TR)
CDBA240L-HF	Comchip Technology	40	2	400	1 mA	100	Active	Tape & Reel (TR)
B240A-13-F	Diodes Incorporated	40	2	500	500 µA	150	Active	Cut Tape (CT) & Digi-Reel®
B240A-E3/5AT	Vishay General Semiconductor - Diodes Division	40	2	550	500 µA	150	Active	Cut Tape (CT) & Digi-Reel®
B240A-E3/61T	Vishay General Semiconductor - Diodes Division	40	2	550	500 µA	150	Active	Cut Tape (CT) & Digi-Reel®
B240A-M3/5AT	Vishay General Semiconductor - Diodes Division	40	2	550	500 µA	150	Active	Tape & Reel (TR)
B240A-M3/61T	Vishay General Semiconductor - Diodes Division	40	2	550	500 µA	150	Active	Tape & Reel (TR)
B240AQ-13-F	Diodes Incorporated	40	2	500	500 µA	150	Active	Tape & Reel (TR)
SS24S-E3/61T	Vishay General Semiconductor - Diodes Division	40	2	550	200 µA	150	Active	Cut Tape (CT)
SSA24-E3/5AT	Vishay General Semiconductor - Diodes Division	40	2	490	200 µA	150	Active	Tape & Reel (TR)
SSA24-E3/61T	Vishay General Semiconductor - Diodes Division	40	2	490	200 µA	150	Active	Cut Tape (CT) & Digi-Reel®

Engineering Selection Recommendations

Primary Substitute (Same Manufacturer): CDBA240L-HF from Comchip Technology is the direct successor to CDBA240L-G. It maintains identical electrical specifications (40V, 2A, 400 mV forward voltage) and is currently in Active product status. This part is recommended as the first choice for direct replacement where design continuity with the original manufacturer is required.

Secondary Substitutes (Cross-Manufacturer, Active Status): All listed substitute parts from Diodes Incorporated and Vishay General Semiconductor maintain the required 40V reverse voltage, 2A current rating, and DO-214AC package form factor. These parts are in Active product status and carry ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1), matching the original part's environmental qualifications.

Packaging Considerations:

Tape & Reel (TR) packaging: CDBA240L-HF, B240A-M3/5AT, B240A-M3/61T, B240AQ-13-F, SSA24-E3/5AT
Cut Tape (CT) & Digi-Reel®: B240A-13-F, B240A-E3/5AT, B240A-E3/61T, SSA24-E3/61T
Cut Tape (CT) only: SS24S-E3/61T

Automotive-Grade Option: B240AQ-13-F carries AEC-Q101 automotive qualification and is suitable for applications requiring automotive-grade component certification.

Forward Voltage Considerations: The CDBA240L-G specifies 400 mV maximum forward voltage at 2A. Substitute parts with higher forward voltage (490–550 mV) remain within acceptable design margins for standard rectifier applications but may result in increased power dissipation in high-current or thermally constrained designs. SSA24-E3/5AT and SSA24-E3/61T offer lower reverse leakage (200 µA) compared to the original part (1 mA), providing improved performance in low-leakage applications.

Frequently Asked Questions (FAQ)

Q: Can I use B240A-13-F as a direct replacement for CDBA240L-G? A: Yes. Both parts share identical reverse voltage (40V), forward current (2A), package (DO-214AC/SMA), and fast recovery speed specifications. The B240A-13-F has higher forward voltage (500 mV vs. 400 mV) and lower reverse leakage (500 µA vs. 1 mA), which are acceptable variations for rectifier applications. Verify thermal design margins if the application is power-dissipation-sensitive.

Q: What is the difference between SSA24-E3/5AT and SSA24-E3/61T? A: Both parts are electrically identical (40V, 2A, 490 mV forward voltage, 200 µA reverse leakage). The difference is packaging: SSA24-E3/5AT is supplied in Tape & Reel (TR), while SSA24-E3/61T is supplied in Cut Tape (CT) & Digi-Reel®. Select based on your procurement and assembly process requirements.

Q: Is CDBA240L-HF a better choice than cross-manufacturer substitutes? A: CDBA240L-HF is recommended as the primary choice because it is from the same manufacturer (Comchip Technology) and maintains identical electrical specifications to the original CDBA240L-G. It offers design continuity and reduces qualification risk. Cross-manufacturer substitutes are valid alternatives when CDBA240L-HF is unavailable.

Q: Why does the CDBA240L-G show "Not For New Designs" status? A: This status indicates the part has reached end-of-life and is no longer recommended for new product designs. Existing inventory may still be available, but long-term supply cannot be guaranteed. For new designs or production continuity, transition to an Active-status substitute part.

Q: Can I mix different substitute parts in the same production batch? A: All listed substitute parts meet the same electrical and mechanical specifications for the 40V, 2A Schottky rectifier function. However, mixing parts from different manufacturers or with different forward voltage ratings (400–550 mV range) may introduce minor variations in circuit performance. For consistency, maintain a single part number per production lot when possible.

Q: What is the significance of the reverse leakage current difference (200 µA to 1 mA)? A: Reverse leakage current affects power dissipation and circuit performance in low-current or high-impedance applications. Lower leakage (200 µA in SSA24 series) is beneficial for precision rectifier circuits. Higher leakage (1 mA in CDBA240L-G) is acceptable for standard power rectification. Select based on application requirements.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts carry ROHS3 Compliant status and MSL 1 (Unlimited) moisture sensitivity rating, matching the environmental compliance of the original CDBA240L-G.

Q: Which substitute offers the best thermal performance? A: B240A-13-F, B240A-E3/5AT, B240A-E3/61T, B240A-M3/5AT, B240A-M3/61T, B240AQ-13-F, SS24S-E3/61T, SSA24-E3/5AT, and SSA24-E3/61T all support maximum junction temperatures of 150°C, compared to 125°C for the original CDBA240L-G. This extended temperature range provides improved thermal margin in high-temperature environments.

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