CD214A-B140LF Equivalent & Substitute Parts

Part Overview

The CD214A-B140LF is a Schottky diode manufactured by Bourns Inc., rated for 40 V DC reverse voltage and 1 A average rectified current in a DO-214AC (SMA) surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The diode features fast recovery characteristics with a maximum forward voltage of 500 mV at 1 A and operates across a junction temperature range of -55°C to 125°C.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	40	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	500 mV @ 1 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	500 µA @ 40 V	µA
Capacitance @ Vr, F	110 pF @ 4V, 1MHz	pF
Package / Case	DO-214AC, SMA	—
Operating Temperature - Junction	-55°C ~ 125°C	°C
Technology	Schottky	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the CD214A-B140LF is determined by the following critical parameters:

Mandatory Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 40 V minimum
Current - Average Rectified (Io): 1 A minimum
Technology: Schottky
Package / Case: DO-214AC (SMA) or compatible surface mount package
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Allowable Variations:

Forward voltage (Vf) may vary within design tolerance
Reverse leakage current may differ
Operating temperature range may extend beyond the original specification
Capacitance values may vary

Substitute parts are grouped into two categories:

Direct Equivalents (40 V, 1 A): Parts with identical voltage and current ratings in the same package family, suitable for direct replacement.

Similar Parts (50 V, 1 A): Parts with higher voltage ratings (50 V) that operate within the 40 V application envelope. These provide additional design margin and are functionally compatible.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Package	Temp Range	Product Status
CD214A-B140LF	Bourns Inc.	40 V	1 A	500 mV @ 1 A	DO-214AC (SMA)	-55°C ~ 125°C	Obsolete
CD214A-B140R	Bourns Inc.	40 V	1 A	500 mV @ 1 A	2-SMD, No Lead	-55°C ~ 125°C	Active
B140-13-F	Diodes Incorporated	40 V	1 A	500 mV @ 1 A	DO-214AC (SMA)	-65°C ~ 150°C	Active
B140Q-13-F	Diodes Incorporated	40 V	1 A	500 mV @ 1 A	DO-214AC (SMA)	-65°C ~ 150°C	Active
CDBA140-G	Comchip Technology	40 V	1 A	500 mV @ 1 A	DO-214AC (SMA)	-65°C ~ 125°C	Active
CDBA140LL-HF	Comchip Technology	40 V	1 A	350 mV @ 1 A	DO-214AC (SMA)	-50°C ~ 100°C	Active
CDBA140SL-G	Comchip Technology	40 V	1 A	310 mV @ 1 A	DO-214AC (SMA)	—	Active
CDBA140SL-HF	Comchip Technology	40 V	1.4 A	330 mV @ 1 A	DO-214AC (SMA)	-50°C ~ 100°C	Active
B150-M3/5AT	Vishay General Semiconductor	50 V	1 A	750 mV @ 1 A	DO-214AC (SMA)	-65°C ~ 150°C	Active
B150-M3/61T	Vishay General Semiconductor	50 V	1 A	750 mV @ 1 A	DO-214AC (SMA)	-65°C ~ 150°C	Active
B150Q-13-F	Diodes Incorporated	50 V	1 A	700 mV @ 1 A	DO-214AC (SMA)	-65°C ~ 150°C	Active

Engineering Selection Recommendations

For Direct Replacement (40 V, 1 A Rating):

The B140-13-F (Diodes Incorporated) and B140Q-13-F (Diodes Incorporated) are direct functional equivalents in the DO-214AC (SMA) package with identical electrical specifications. Both are active products with extended operating temperature ranges (-65°C to 150°C) compared to the obsolete CD214A-B140LF. The B140Q-13-F carries AEC-Q101 automotive qualification, suitable for applications requiring automotive-grade components.

The CDBA140-G (Comchip Technology) provides an active alternative with matching 40 V / 1 A specifications and DO-214AC packaging. This part maintains the same electrical characteristics as the original.

For Applications Requiring Lower Forward Voltage:

The CDBA140LL-HF and CDBA140SL-G (Comchip Technology) offer reduced forward voltage (350 mV and 310 mV respectively at 1 A) compared to the original 500 mV specification. These parts are suitable for applications where lower power dissipation is beneficial. Note that CDBA140LL-HF operates within a narrower temperature range (-50°C to 100°C).

For Applications Requiring Higher Current Capacity:

The CDBA140SL-HF (Comchip Technology) supports 1.4 A average rectified current while maintaining 40 V reverse voltage rating and DO-214AC packaging. This part accommodates higher current demands within the same package footprint.

For Applications Requiring Higher Voltage Margin:

The B150-M3/5AT, B150-M3/61T (Vishay General Semiconductor), and B150Q-13-F (Diodes Incorporated) provide 50 V reverse voltage rating with 1 A current capacity. These parts operate within the 40 V application envelope with additional voltage headroom. The B150Q-13-F includes AEC-Q101 automotive qualification.

Compliance Considerations:

All substitute parts listed are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating, matching the original part's environmental compliance profile.

Frequently Asked Questions (FAQ)

Q: Can I use a 50 V rated diode (B150 series) in place of the 40 V CD214A-B140LF?

A: Yes. A 50 V rated Schottky diode operates within the 40 V application envelope and provides additional voltage margin. The diode will function correctly in any circuit designed for 40 V operation. Forward voltage and current characteristics remain the primary design considerations.

Q: What is the difference between the CD214A-B140R and CD214A-B140LF?

A: Both parts are manufactured by Bourns Inc. with identical electrical specifications (40 V, 1 A, 500 mV forward voltage). The primary difference is packaging: CD214A-B140LF uses DO-214AC (SMA) single package, while CD214A-B140R uses 2-SMD (No Lead) configuration. The CD214A-B140R is an active product, making it the preferred Bourns equivalent.

Q: Are there differences in forward voltage between substitute parts?

A: Yes. The original CD214A-B140LF specifies 500 mV maximum forward voltage at 1 A. Alternatives vary: B140-13-F and CDBA140-G match this specification, while CDBA140LL-HF and CDBA140SL-G offer lower forward voltages (350 mV and 310 mV respectively). Lower forward voltage reduces power dissipation but may require circuit verification if the original design depends on specific voltage drop characteristics.

Q: Can I substitute CDBA140SL-HF (1.4 A) for the 1 A CD214A-B140LF?

A: Yes. A diode rated for higher current (1.4 A) is suitable for applications requiring 1 A. The higher current rating provides additional design margin. All other electrical parameters (40 V reverse voltage, fast recovery speed, DO-214AC package) remain compatible.

Q: What is the significance of AEC-Q101 qualification on B140Q-13-F and B150Q-13-F?

A: AEC-Q101 is an automotive industry qualification standard. Parts carrying this qualification have undergone additional reliability testing and are approved for automotive applications. If your application requires automotive-grade components, select B140Q-13-F or B150Q-13-F accordingly.

Q: Does the operating temperature range affect substitution suitability?

A: The original CD214A-B140LF operates from -55°C to 125°C. Most active substitutes extend this range to -65°C to 150°C, providing broader environmental coverage. If your application operates within the original -55°C to 125°C range, any substitute with an equal or wider temperature specification is suitable. Verify that your specific application does not require the narrower range of parts like CDBA140LL-HF (-50°C to 100°C).

Q: Are all substitute parts available in the same DO-214AC (SMA) package?

A: Yes. All substitute parts listed are available in DO-214AC (SMA) surface mount package, ensuring mechanical and electrical compatibility with the original CD214A-B140LF footprint. No PCB layout modifications are required.

Q: What is the difference between Tape & Reel (TR) and Cut Tape (CT) packaging?

A: Tape & Reel and Cut Tape are distribution formats for surface mount components. Tape & Reel provides components on continuous carrier tape suitable for automated assembly equipment. Cut Tape provides smaller quantities cut from the reel. Both formats contain identical components; the difference is in order quantity and handling. Verify your procurement and assembly process requirements when selecting between these packaging options.

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