CD214A-B150LF Equivalent & Substitute Parts

Part Overview

The CD214A-B150LF is a Schottky rectifier diode manufactured by Bourns Inc., rated for 50 V DC reverse voltage and 1 A average rectified current in a DO-214AC (SMA) surface mount package. The device is classified as obsolete, necessitating identification of active equivalent and substitute components for new designs and production continuity. Equivalent parts maintain identical electrical specifications, while substitute parts offer compatible performance within defined parameter ranges suitable for the same application circuit requirements.

Key Parameters

Parameter	CD214A-B150LF Value	Unit
Voltage - DC Reverse (Vr) (Max)	50	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	700 mV @ 1 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	500 µA @ 50 V	µA
Capacitance @ Vr, F	110	pF @ 4V, 1MHz
Package / Case	DO-214AC, SMA	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 125	°C
Technology	Schottky	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the CD214A-B150LF is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 50 V
Current - Average Rectified (Io): Must equal or exceed 1 A
Voltage - Forward (Vf) (Max) @ If: Must not exceed 700 mV @ 1 A
Speed: Must maintain Fast Recovery ≤ 500ns, > 200mA (Io)
Package / Case: Must be DO-214AC (SMA) or compatible surface mount package
Mounting Type: Surface Mount required
Technology: Schottky diode technology

Substitution Categories:

Direct Equivalents (Identical Specifications): Parts maintaining all electrical parameters within the specified ranges and identical package designation.

Voltage-Rated Equivalents (Higher Voltage Rating): Parts with voltage ratings exceeding 50 V while maintaining all other electrical specifications. These provide enhanced reverse voltage margin and are electrically compatible in 50 V applications.

Lower Voltage Substitutes (Conditional Use): Parts rated below 50 V (40 V) are listed for reference but require circuit voltage verification before application. These are suitable only in applications where the actual reverse voltage stress does not exceed the substitute part's rating.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ 1A [mV]	Package	Product Status	Temp Range [°C]
CD214A-B150LF	Bourns Inc.	50	1	700	DO-214AC (SMA)	Obsolete	-55 to 125
CD214A-B160R	Bourns Inc.	60	1	700	2-SMD, No Lead	Active	-55 to 125
B150-13-F	Diodes Incorporated	50	1	700	DO-214AC (SMA)	Active	-65 to 150
B140-M3/5AT	Vishay General Semiconductor	40	1	520	DO-214AC (SMA)	Active	-65 to 150
B140-M3/61T	Vishay General Semiconductor	40	1	520	DO-214AC (SMA)	Active	-65 to 150
B140Q-13-F	Diodes Incorporated	40	1	500	DO-214AC (SMA)	Active	-65 to 150
B150-E3/5AT	Vishay General Semiconductor	50	1	750	DO-214AC (SMA)	Active	-65 to 150
B150-E3/61T	Vishay General Semiconductor	50	1	750	DO-214AC (SMA)	Active	-65 to 150
B150Q-13-F	Diodes Incorporated	50	1	700	DO-214AC (SMA)	Active	-65 to 150
CDBA140LL-HF	Comchip Technology	40	1	350	DO-214AC (SMA)	Active	-50 to 100
CDBA140SL-G	Comchip Technology	40	1	310	DO-214AC (SMA)	Active	Max 125

Engineering Selection Recommendations

Recommended Direct Equivalent (Active Status):

B150-13-F (Diodes Incorporated) is the primary recommended equivalent. This part maintains identical electrical specifications to the CD214A-B150LF: 50 V reverse voltage rating, 1 A average rectified current, 700 mV forward voltage drop at 1 A, and DO-214AC (SMA) package compatibility. The device is in active production status with extended operating temperature range (-65°C to 150°C) compared to the obsolete original. RoHS3 compliance and MSL 1 rating are maintained. This part provides direct functional replacement with no circuit modifications required.

Alternative Equivalent (Higher Voltage Rating):

CD214A-B160R (Bourns Inc.) offers 60 V reverse voltage rating while maintaining 1 A current capacity and 700 mV forward voltage specification. Active production status and identical temperature range (-55°C to 125°C) to the original part are provided. Package configuration differs (2-SMD, No Lead versus DO-214AC), requiring PCB layout verification before implementation.

Voltage-Compatible Substitutes (50 V Rating):

B150-E3/5AT and B150-E3/61T (Vishay General Semiconductor) both provide 50 V reverse voltage and 1 A current ratings in DO-214AC (SMA) packages. Forward voltage specification is 750 mV at 1 A, within acceptable tolerance of the original 700 mV specification. Extended temperature range (-65°C to 150°C) and active production status support long-term availability.

B150Q-13-F (Diodes Incorporated) matches the original specification exactly: 50 V, 1 A, 700 mV forward voltage, DO-214AC (SMA) package. Automotive-grade qualification (AEC-Q101) and active production status are provided. Extended temperature range (-65°C to 150°C) exceeds original specifications.

Lower Voltage Substitutes (40 V Rating - Conditional):

Parts rated at 40 V reverse voltage (B140-M3/5AT, B140-M3/61T, B140Q-13-F, CDBA140LL-HF, CDBA140SL-G) are suitable only in applications where the actual reverse voltage stress does not exceed 40 V. Circuit analysis must confirm that peak reverse voltage remains below the 40 V rating before substitution. These parts offer improved forward voltage characteristics (500–520 mV) compared to the original 700 mV specification.

Compliance and Certification:

All recommended parts maintain RoHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating. B150Q-13-F includes AEC-Q101 automotive qualification, suitable for automotive and industrial applications requiring enhanced reliability documentation.

Frequently Asked Questions (FAQ)

Q: Can the CD214A-B150LF be directly replaced with B150-13-F?

A: Yes. B150-13-F is a direct electrical equivalent with identical 50 V reverse voltage, 1 A current rating, and 700 mV forward voltage specification. Both use DO-214AC (SMA) packages. B150-13-F is in active production, addressing the obsolete status of the original part.

Q: What is the difference between CD214A-B160R and CD214A-B150LF?

A: CD214A-B160R has a higher reverse voltage rating (60 V versus 50 V) and uses a 2-SMD package instead of DO-214AC. The 60 V rating provides additional reverse voltage margin. PCB layout compatibility must be verified due to package differences.

Q: Can 40 V rated parts (B140 series) replace the 50 V CD214A-B150LF?

A: 40 V parts are suitable only if circuit analysis confirms that the actual reverse voltage stress does not exceed 40 V. The original 50 V rating provides margin for voltage transients and overshoot conditions. Substitution requires verification that peak reverse voltage remains below 40 V under all operating conditions, including transient events.

Q: What is the significance of the forward voltage difference between parts?

A: Forward voltage (Vf) affects power dissipation and voltage drop across the diode during conduction. The original CD214A-B150LF specifies 700 mV at 1 A. Substitutes with lower Vf (such as CDBA140LL-HF at 350 mV) reduce power loss and heat generation. Substitutes with higher Vf (such as B150-E3/5AT at 750 mV) increase power dissipation. Circuit thermal analysis should confirm that power dissipation remains within acceptable limits.

Q: Are all substitute parts available in the same package?

A: Most recommended substitutes use DO-214AC (SMA) packages, matching the original. CD214A-B160R uses a 2-SMD package, requiring PCB layout verification. Confirm package compatibility with existing PCB designs before implementation.

Q: What does AEC-Q101 qualification mean?

A: AEC-Q101 is an automotive industry qualification standard for discrete semiconductors. Parts with this qualification (such as B140Q-13-F and B150Q-13-F) have undergone enhanced reliability testing and are suitable for automotive and high-reliability applications. Non-qualified parts are suitable for general industrial and consumer applications.

Q: How do operating temperature ranges affect substitution?

A: The original CD214A-B150LF operates from -55°C to 125°C. Most active substitutes extend this range to -65°C to 150°C, providing enhanced performance margin at temperature extremes. CDBA140LL-HF operates from -50°C to 100°C, a narrower range than the original. Verify that the substitute's temperature range meets application requirements.

Q: What is the importance of RoHS3 compliance?

A: RoHS3 compliance indicates that the part meets European Union restrictions on hazardous substances, including lead-free solder compatibility. All recommended substitutes maintain RoHS3 compliance, ensuring compatibility with modern manufacturing processes and environmental regulations.

Q: Can reverse leakage current differences affect circuit performance?

A: Reverse leakage current (Ir) affects standby power consumption and circuit performance in high-impedance applications. The original CD214A-B150LF specifies 500 µA at 50 V. Substitutes with lower leakage (such as Vishay B150 series at 200 µA) reduce standby current. Substitutes with higher leakage (such as Comchip CDBA140 series at 1 mA) increase standby current. Verify that leakage current remains acceptable for the application.

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