Equivalent & Substitute Parts for B350A-M3/5AT

Part Overview

The B350A-M3/5AT is a Schottky rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 50V DC reverse voltage and 3A average rectified current in a surface mount DO-214AC (SMA) package. This component is classified as Active product status and is ROHS3 compliant. Equivalent and substitute parts are identified to address inventory availability, lead time constraints, or specific application requirements while maintaining electrical and mechanical compatibility within defined parameter ranges.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	50	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	720 mV @ 3 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	200	µA @ 50 V
Capacitance @ Vr, F	145	pF @ 4V, 1MHz
Package / Case	DO-214AC, SMA	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 150	°C
Technology	Schottky	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the B350A-M3/5AT are grouped based on strict electrical and mechanical parameter compatibility. The primary substitution criteria are:

Electrical Parameters:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 50V
Current - Average Rectified (Io): Must equal or exceed 3A
Technology: Schottky diode type
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Mechanical Parameters:

Package / Case: DO-214AC (SMA) surface mount package
Mounting Type: Surface Mount

Compliance Parameters:

RoHS Status: ROHS3 Compliant
Product Status: Active

Parts are classified into two categories:

Parametric Equivalents: Parts that match all electrical specifications (50V, 3A) and mechanical requirements, differing only in manufacturer or tape reel configuration.

MFR Recommended Alternatives: Parts from alternative manufacturers that meet or exceed the primary electrical specifications but may have variations in secondary parameters such as forward voltage, reverse leakage current, or capacitance. These parts are suitable for applications where the primary electrical ratings are the controlling factors.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV]	Ir @ Vr [µA]	C @ Vr [pF]	Package	Temp Range [°C]	RoHS
B350A-M3/5AT	Vishay	50	3	720 @ 3A	200 @ 50V	145 @ 4V	DO-214AC	-55 to 150	ROHS3
B350A-E3/5AT	Vishay	50	3	720 @ 3A	200 @ 50V	145 @ 4V	DO-214AC	-55 to 150	ROHS3
B350A-E3/61T	Vishay	50	3	720 @ 3A	200 @ 50V	145 @ 4V	DO-214AC	-55 to 150	ROHS3
B350A-M3/61T	Vishay	50	3	720 @ 3A	200 @ 50V	145 @ 4V	DO-214AC	-55 to 150	ROHS3
B350A-13-F	Diodes Inc.	50	3	700 @ 3A	500 @ 50V	200 @ 4V	DO-214AC	-55 to 150	ROHS3
CDBA140-G	Comchip	40	1	500 @ 1A	500 @ 40V	—	DO-214AC	-65 to 125	ROHS3
CDBA140SL-HF	Comchip	40	1.4	330 @ 1A	1000 @ 40V	—	DO-214AC	-50 to 100	ROHS3
CDBA240-G	Comchip	40	2	500 @ 2A	500 @ 40V	—	DO-214AC	-55 to 125	ROHS3
CDBA240-HF	Comchip	40	2	500 @ 2A	500 @ 40V	—	DO-214AC	-55 to 125	ROHS3
CDBA340-G	Comchip	40	3	500 @ 3A	500 @ 40V	—	DO-214AC	-55 to 150	ROHS3
CDBA340-HF	Comchip	40	3	500 @ 3A	500 @ 40V	250 @ 4V	DO-214AC	-50 to 150	ROHS3

Engineering Selection Recommendations

Direct Parametric Equivalents (Recommended for Pin-for-Pin Replacement):

The parts B350A-E3/5AT, B350A-E3/61T, and B350A-M3/61T are direct parametric equivalents to the B350A-M3/5AT. All four parts share identical electrical specifications (50V, 3A, 720mV forward voltage, 200µA reverse leakage) and mechanical packaging (DO-214AC). These parts differ only in tape reel configuration or internal manufacturing process designation. Selection among these equivalents is based on inventory availability and packaging format requirements. All are Active product status and ROHS3 compliant.

Alternative Manufacturer Option (Diodes Incorporated):

The B350A-13-F from Diodes Incorporated meets the primary electrical requirements (50V, 3A) and is rated for automotive applications with AEC-Q101 qualification. This part exhibits a lower forward voltage (700mV vs. 720mV) and higher reverse leakage current (500µA vs. 200µA) compared to the Vishay B350A-M3/5AT. The B350A-13-F is suitable for applications where automotive-grade qualification is required and the specified parameter variations are acceptable. Packaging is DO-214AC surface mount with identical operating temperature range (-55°C to 150°C).

Lower Voltage Rating Alternatives (Comchip Technology):

The CDBA340-G and CDBA340-HF from Comchip Technology are rated for 40V maximum reverse voltage and 3A current, representing a 10V reduction in voltage rating compared to the B350A-M3/5AT. These parts are suitable only for applications where the circuit maximum reverse voltage does not exceed 40V. The CDBA340-HF variant provides higher inventory availability (655,100 pcs) and includes capacitance specification (250pF @ 4V). Both maintain DO-214AC packaging and ROHS3 compliance.

The CDBA240-G and CDBA240-HF are rated for 40V and 2A, providing reduced current capacity. The CDBA140-G and CDBA140SL-HF are rated for 40V and 1A or 1.4A respectively, representing significant reductions in both voltage and current ratings. These lower-rated parts are not suitable as direct substitutes for the B350A-M3/5AT in applications requiring 50V/3A specifications.

Frequently Asked Questions (FAQ)

Q: Can the B350A-E3/5AT be used as a direct replacement for the B350A-M3/5AT?

A: Yes. The B350A-E3/5AT is a parametric equivalent with identical electrical specifications (50V, 3A, 720mV forward voltage, 200µA reverse leakage) and mechanical packaging (DO-214AC surface mount). The parts differ only in tape reel configuration or manufacturing process designation. Direct pin-for-pin substitution is supported.

Q: What is the difference between B350A-M3/5AT and B350A-E3/61T?

A: Both parts are parametric equivalents with identical electrical and mechanical specifications. The differences are in tape reel configuration (5AT vs. 61T designation) and inventory levels. Selection is based on packaging format availability and supply chain requirements.

Q: Can the Diodes Incorporated B350A-13-F replace the Vishay B350A-M3/5AT?

A: The B350A-13-F meets the primary electrical requirements (50V, 3A) and is suitable for applications where automotive-grade qualification (AEC-Q101) is required. However, it exhibits a 20mV lower forward voltage (700mV vs. 720mV) and 300µA higher reverse leakage current (500µA vs. 200µA). These parameter variations must be evaluated against specific circuit requirements before substitution.

Q: Why are Comchip CDBA340 parts listed as alternatives if they have a lower voltage rating?

A: The CDBA340-G and CDBA340-HF are listed as MFR recommended alternatives for applications where the maximum reverse voltage does not exceed 40V. These parts are not suitable for circuits requiring the full 50V rating of the B350A-M3/5AT. Voltage rating selection must be based on actual circuit requirements.

Q: What is the significance of the "-HF" suffix in Comchip part numbers?

A: The "-HF" designation indicates a variant with different manufacturing or quality specifications. For example, CDBA340-HF provides higher inventory availability and includes capacitance specification (250pF @ 4V) compared to CDBA340-G. Both maintain identical voltage and current ratings (40V, 3A) and DO-214AC packaging.

Q: Are all listed substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed in this reference are ROHS3 compliant and suitable for applications requiring RoHS compliance.

Q: Can lower current-rated parts (CDBA240, CDBA140) be used in place of the B350A-M3/5AT?

A: No. The CDBA240 series (2A) and CDBA140 series (1A or 1.4A) have reduced current ratings below the 3A requirement of the B350A-M3/5AT. These parts are not suitable as substitutes for applications requiring 3A current capacity.

Q: What packaging formats are available for the B350A-M3/5AT equivalents?

A: All parametric equivalents (B350A-E3/5AT, B350A-E3/61T, B350A-M3/61T) use DO-214AC (SMA) surface mount packaging. The tape reel configuration differs (5AT vs. 61T), affecting packaging format and reel specifications. The Diodes Incorporated B350A-13-F is supplied in Cut Tape (CT) & Digi-Reel® format with identical DO-214AC package.

Q: What is the operating temperature range for the B350A-M3/5AT and its equivalents?

A: The B350A-M3/5AT and its Vishay parametric equivalents (B350A-E3/5AT, B350A-E3/61T, B350A-M3/61T) operate from -55°C to 150°C junction temperature. The Diodes Incorporated B350A-13-F shares the same temperature range. Comchip alternatives vary: CDBA340-G and CDBA340-HF support -55°C to 150°C; CDBA240 variants support -55°C to 125°C; CDBA140-G supports -65°C to 125°C; CDBA140SL-HF supports -50°C to 100°C.

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