MBRS320 Equivalent & Substitute Parts

Part Overview

The MBRS320 is a Schottky rectifier diode rated for 20 V DC reverse voltage and 4 A average rectified current in a surface mount SMC (DO-214AB) package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The MBRS320 is suitable for fast recovery applications requiring low forward voltage drop and rapid switching characteristics typical of Schottky technology.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	20 V
Current - Average Rectified (Io)	4 A
Voltage - Forward (Vf) (Max) @ If	500 mV @ 3 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	2 mA @ 20 V
Package / Case	DO-214AB, SMC
Mounting Type	Surface Mount
Operating Temperature - Junction	-65°C ~ 125°C
Technology	Schottky
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the MBRS320 is determined by the following critical parameters: voltage rating (20 V DC reverse), current capacity, forward voltage characteristics, package type (DO-214AB SMC), and operating temperature range. Substitute parts are grouped into two categories based on current rating compatibility:

Category 1: Direct Current Rating Match (4 A) No active substitute parts with exactly 4 A rating are available. The MBRS320T3G from onsemi provides the closest match as a direct manufacturer alternative with reduced current rating (3 A) and extended temperature range.

Category 2: Reduced Current Rating (3 A) Parts rated for 3 A average rectified current are functionally compatible in applications where the full 4 A capacity is not required. These include MBRS320T3G, B320-13-F, B320Q-13-F, SS32-E3/57T, SSL32, and SX32_R1_00001. All maintain the 20 V voltage rating, fast recovery speed, and SMC package format.

Category 3: Increased Current Rating (5 A) Parts rated for 5 A average rectified current (B520C-13-F and B520CQ-13-F) provide higher current capacity while maintaining 20 V voltage rating and SMC package compatibility. These are suitable for applications requiring additional current margin.

Category 4: Reduced Voltage Rating (15 V) The VS-30BQ015-M3/9AT operates at 15 V maximum reverse voltage with 3 A current rating. This part is compatible only in applications where the lower voltage rating is acceptable.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io (A)	Vf (Max) @ If	Package	Temp Range (°C)	Product Status
MBRS320	onsemi	20 V	4	500 mV @ 3 A	DO-214AB, SMC	-65 ~ 125	Obsolete
MBRS320T3G	onsemi	20 V	3	500 mV @ 3 A	DO-214AB, SMC	-65 ~ 150	Active
B320-13-F	Diodes Incorporated	20 V	3	500 mV @ 3 A	DO-214AB, SMC	-55 ~ 125	Active
B320Q-13-F	Diodes Incorporated	20 V	3	500 mV @ 3 A	DO-214AB, SMC	-55 ~ 150	Active
B520C-13-F	Diodes Incorporated	20 V	5	550 mV @ 5 A	DO-214AB, SMC	-55 ~ 150	Active
B520CQ-13-F	Diodes Incorporated	20 V	5	550 mV @ 5 A	DO-214AB, SMC	-55 ~ 150	Active
SS32-E3/57T	Vishay General Semiconductor	20 V	3	500 mV @ 3 A	DO-214AB, SMC	-55 ~ 125	Active
SSL32	Taiwan Semiconductor Corporation	20 V	3	Not specified	DO-214AB, SMC	-55 ~ 125	Active
SX32_R1_00001	Panjit International Inc.	20 V	3	500 mV @ 3 A	DO-214AC, SMA	-55 ~ 125	Active
VS-30BQ015-M3/9AT	Vishay General Semiconductor	15 V	3	350 mV @ 3 A	DO-214AB, SMC	-55 ~ 125	Active

Engineering Selection Recommendations

For Direct Replacement (Obsolete to Active Transition): MBRS320T3G from onsemi is the primary direct substitute. It maintains the same manufacturer lineage, identical voltage and forward voltage specifications, and extends the operating temperature range to -65°C ~ 150°C. Current rating is reduced from 4 A to 3 A; this substitution is valid only for applications where 3 A capacity is sufficient.

For 20 V / 3 A Applications: B320-13-F and B320Q-13-F from Diodes Incorporated are active alternatives with identical electrical specifications. B320Q-13-F includes AEC-Q101 automotive qualification and extended temperature range (-55°C ~ 150°C), suitable for automotive and industrial applications. SS32-E3/57T from Vishay and SSL32 from Taiwan Semiconductor Corporation provide equivalent 20 V / 3 A performance with ROHS3 compliance.

For 20 V / 5 A Applications: B520C-13-F and B520CQ-13-F provide increased current capacity while maintaining 20 V rating and SMC package compatibility. B520CQ-13-F includes AEC-Q101 automotive qualification. Forward voltage increases to 550 mV at 5 A. These parts are suitable for applications requiring higher current margin than the original 4 A specification.

For Reduced Voltage Applications (15 V): VS-30BQ015-M3/9AT operates at 15 V maximum reverse voltage with 3 A current rating. This part is compatible only in applications where 15 V voltage rating is acceptable. Forward voltage is reduced to 350 mV at 3 A.

Package Consideration: SX32_R1_00001 uses DO-214AC (SMA) package instead of DO-214AB (SMC). This package difference requires PCB layout modification and is not a direct mechanical substitute.

Compliance and Certification: All substitute parts listed are ROHS3 compliant and REACH unaffected. Parts designated with "Q" suffix (B320Q-13-F, B520CQ-13-F) carry AEC-Q101 automotive qualification for applications requiring automotive-grade components.

Frequently Asked Questions (FAQ)

Q: Can MBRS320T3G directly replace MBRS320 in all applications? A: MBRS320T3G is a direct electrical and mechanical substitute with one limitation: current rating is reduced from 4 A to 3 A. Substitution is valid only if the application does not require the full 4 A capacity. All other parameters including voltage, forward voltage, package, and compliance are equivalent or superior.

Q: What is the difference between B320-13-F and B320Q-13-F? A: Both parts are identical in electrical specifications (20 V, 3 A, 500 mV forward voltage). B320Q-13-F includes AEC-Q101 automotive qualification and extended operating temperature range (-55°C ~ 150°C) compared to B320-13-F (-55°C ~ 125°C). B320Q-13-F is required for automotive applications.

Q: Can I use B520C-13-F (5 A) instead of MBRS320 (4 A)? A: Yes. B520C-13-F provides higher current capacity (5 A) while maintaining 20 V voltage rating and SMC package compatibility. Forward voltage increases to 550 mV at 5 A. This substitution is valid for all applications where the original 4 A specification is acceptable, with the benefit of additional current margin.

Q: Why is SX32_R1_00001 listed if it uses a different package? A: SX32_R1_00001 uses DO-214AC (SMA) package instead of DO-214AB (SMC). While electrically equivalent (20 V, 3 A, 500 mV forward voltage), the different package requires PCB layout modification. It is not a direct mechanical substitute and should be selected only if package change is acceptable.

Q: Is VS-30BQ015-M3/9AT compatible with MBRS320? A: VS-30BQ015-M3/9AT is electrically compatible only in applications where 15 V maximum reverse voltage is acceptable. The original MBRS320 is rated for 20 V. This part should not be used as a substitute in circuits designed for 20 V operation.

Q: What does "obsolete" status mean for MBRS320? A: Obsolete status indicates the part is no longer manufactured by onsemi. Existing inventory may be available from distributors, but long-term supply is not guaranteed. Active substitute parts listed in this document provide equivalent or superior specifications for new designs and ongoing procurement.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All substitute parts listed in this document are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What is the significance of "Fast Recovery ≤ 500ns, > 200mA (Io)"? A: This specification indicates the diode switching speed. All listed substitute parts maintain this fast recovery characteristic, ensuring compatibility in high-frequency switching applications where the original MBRS320 was used.

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