CD214A-B240LLF Equivalent & Substitute Parts

Part Overview

The CD214A-B240LLF is a Schottky diode manufactured by Bourns Inc., rated for 40 V DC reverse voltage and 2 A average rectified current in a DO-214AC (SMA) surface mount package. This component is classified as obsolete, which necessitates identification of functionally equivalent active alternatives for new designs and ongoing production requirements. Substitute parts must maintain electrical performance within the specified parameters while offering active product status and continued availability.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	40	V
Current - Average Rectified (Io)	2	A
Voltage - Forward (Vf) (Max) @ If	430 mV @ 2 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	2 mA @ 40 V	mA
Mounting Type	Surface Mount	—
Package / Case	DO-214AC, SMA	—
Operating Temperature - Junction	-55°C ~ 125°C	°C
Technology	Schottky	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution eligibility for the CD214A-B240LLF is determined by the following critical parameters:

Mandatory Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 40 V
Current - Average Rectified (Io): 2 A
Technology: Schottky
Mounting Type: Surface Mount
Package / Case: DO-214AC, SMA

Allowable Variation Parameters:

Voltage - Forward (Vf) (Max) @ If: Substitute parts may exceed the original 430 mV specification up to 550 mV at 2 A, as this represents acceptable performance margin within Schottky diode technology
Current - Reverse Leakage @ Vr: Substitute parts may exhibit higher leakage (up to 500 µA) while maintaining functional equivalence
Operating Temperature - Junction: Substitute parts with extended temperature ranges (-65°C to 150°C) provide enhanced capability and are acceptable
Capacitance @ Vr, F: Variations in junction capacitance are acceptable when not specified in substitute datasheets

Substitute parts must maintain RoHS3 compliance and surface mount DO-214AC (SMA) package compatibility. Parts with active product status are prioritized over obsolete or not-for-new-designs classifications.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ 2A [mV]	Reverse Leakage @ 40V [µA/mA]	Package	Product Status	Temp Range [°C]
CD214A-B240LLF	Bourns Inc.	40	2	430	2 mA	DO-214AC (SMA)	Obsolete	-55 ~ 125
CD214A-B240LR	Bourns Inc.	40	2	400	1 mA	2-SMD, No Lead	Active	-55 ~ 125
B240A-13-F	Diodes Incorporated	40	2	500	500 µA	DO-214AC (SMA)	Active	-65 ~ 150
B240A-E3/61T	Vishay General Semiconductor	40	2	550	500 µA	DO-214AC (SMA)	Active	-65 ~ 150
B240A-M3/5AT	Vishay General Semiconductor	40	2	550	500 µA	DO-214AC (SMA)	Active	-65 ~ 150
B240AQ-13-F	Diodes Incorporated	40	2	500	500 µA	DO-214AC (SMA)	Active	-65 ~ 150
CDBA240-G	Comchip Technology	40	2	500	500 µA	DO-214AC (SMA)	Active	-55 ~ 125
CDBA240-HF	Comchip Technology	40	2	500	500 µA	DO-214AC (SMA)	Active	-55 ~ 125
SS24S-E3/5AT	Vishay General Semiconductor	40	2	550	200 µA	DO-214AC (SMA)	Active	-55 ~ 150
SS24S-E3/61T	Vishay General Semiconductor	40	2	550	200 µA	DO-214AC (SMA)	Active	-55 ~ 150

Engineering Selection Recommendations

Primary Substitutes (Identical Package, Active Status):

The following parts provide direct substitution with identical DO-214AC (SMA) package compatibility and active product status:

B240A-13-F (Diodes Incorporated): Active status with extended temperature range (-65°C to 150°C). Forward voltage of 500 mV at 2 A is within acceptable margin. Automotive-grade qualification available in B240AQ-13-F variant.
B240A-E3/61T (Vishay General Semiconductor): Active status with extended temperature range. Forward voltage specification of 550 mV represents upper acceptable limit for Schottky diode performance.
CDBA240-G and CDBA240-HF (Comchip Technology): Active status with DO-214AC (SMA) package. Both variants maintain original temperature range (-55°C to 125°C) matching the CD214A-B240LLF.
SS24S-E3/5AT and SS24S-E3/61T (Vishay General Semiconductor): Active status with extended temperature capability to 150°C. Reverse leakage of 200 µA represents improved performance relative to original specification.

Secondary Substitute (Package Variation):

CD214A-B240LR (Bourns Inc.): Active status from original manufacturer. Package configuration is 2-SMD, No Lead rather than DO-214AC (SMA), requiring PCB layout modification. Forward voltage of 400 mV is superior to original specification.

Not Recommended for New Designs:

RB056L-40TE25 (Rohm Semiconductor): Rated for 3 A average rectified current, exceeding the 2 A requirement. Product status is "Not For New Designs," indicating manufacturer discontinuation trajectory.

Compliance Considerations:

All recommended substitute parts maintain RoHS3 compliance. Parts from Diodes Incorporated (B240AQ-13-F) carry AEC-Q101 automotive qualification, suitable for applications requiring automotive-grade components. REACH status varies by manufacturer; Diodes Incorporated and Vishay parts are REACH Unaffected, while Bourns parts are REACH Affected.

Frequently Asked Questions (FAQ)

Q: Can the CD214A-B240LR substitute for the CD214A-B240LLF despite different package designations?

A: The CD214A-B240LR uses a 2-SMD, No Lead package configuration, while the original part specifies DO-214AC (SMA). Although both are surface mount Schottky diodes with identical electrical ratings (40 V, 2 A), the physical package geometry differs. PCB footprint redesign is required for substitution. The 2-SMD package is not a direct drop-in replacement.

Q: What is the significance of forward voltage variation among substitute parts?

A: The CD214A-B240LLF specifies 430 mV maximum forward voltage at 2 A. Substitute parts range from 400 mV to 550 mV at the same current. Forward voltage affects power dissipation and thermal performance. Parts with lower forward voltage (400–500 mV) generate less heat; parts at 550 mV represent the upper acceptable limit for Schottky diode technology. Selection depends on thermal design margins in the application circuit.

Q: Are Diodes Incorporated B240A-13-F and B240AQ-13-F interchangeable?

A: Both parts share identical electrical specifications (40 V, 2 A, 500 mV forward voltage) and DO-214AC (SMA) package. The B240AQ-13-F variant includes AEC-Q101 automotive qualification and is supplied on tape and reel. The B240A-13-F is supplied on cut tape and digi-reel. Selection depends on packaging requirements and whether automotive qualification is mandated by application specifications.

Q: Why do some substitute parts specify extended operating temperature ranges?

A: Parts such as B240A-13-F, B240A-E3/61T, and B240AQ-13-F extend the maximum junction temperature to 150°C compared to the original 125°C specification. Extended temperature capability provides design margin for applications operating in elevated ambient conditions or with high power dissipation. This represents enhanced capability and does not compromise compatibility with designs rated for the original -55°C to 125°C range.

Q: What is the impact of reverse leakage current variation on circuit performance?

A: The CD214A-B240LLF specifies 2 mA reverse leakage at 40 V. Substitute parts range from 200 µA to 500 µA at the same voltage. Lower reverse leakage reduces standby current consumption and improves circuit efficiency. Higher leakage (up to 500 µA) remains within acceptable limits for most rectification and power management applications. Critical low-power or precision analog circuits may require parts with lower leakage specifications (SS24S variants at 200 µA).

Q: Is the Rohm RB056L-40TE25 a suitable substitute despite higher current rating?

A: The RB056L-40TE25 is rated for 3 A average rectified current, exceeding the 2 A requirement of the original part. While higher current capability provides design margin, the part carries "Not For New Designs" status, indicating manufacturer discontinuation. This classification makes it unsuitable for new product development. Additionally, the PMDS package differs from DO-214AC (SMA), requiring footprint modification.

Q: What compliance certifications should be verified for critical applications?

A: All recommended substitute parts maintain RoHS3 compliance. For automotive applications, the B240AQ-13-F (Diodes Incorporated) carries AEC-Q101 qualification. REACH compliance status varies: Diodes Incorporated and Vishay parts are REACH Unaffected; Bourns and Comchip parts are REACH Affected. Applications subject to REACH regulations should specify parts from manufacturers with REACH Unaffected status.

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