MBRS320T3 Equivalent & Substitute Parts

Part Overview

The MBRS320T3 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 continuity. The part exhibits fast recovery characteristics with switching speeds ≤ 500 ns and forward voltage of 500 mV at 3 A. Substitute parts must maintain electrical compatibility within the specified voltage and current parameters while accommodating modern RoHS compliance requirements.

Substiute Parts

MBRS320T3

onsemiIn Stock: 16919MBRS320T3 Datasheet

Current PartRFQ

MBRS320T3G

onsemiIn Stock: 103749MBRS320T3G Datasheet

DirectRFQ

SK32E3/TR13

Microsemi CorporationIn Stock: 970SK32E3/TR13 Datasheet

SimilarRFQ

SS32-E3/57T

Vishay General Semiconductor - Diodes DivisionIn Stock: 1362SS32-E3/57T Datasheet

SimilarRFQ

STPS340S

STMicroelectronicsIn Stock: 50815STPS340S Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MBRS320T3 is determined by the following critical parameters:

Voltage Rating: Substitute parts must maintain a DC reverse voltage rating (Vr) of 20 V or greater. Parts with higher voltage ratings (40 V) are acceptable as they provide additional design margin.

Current Rating: The MBRS320T3 is rated for 4 A average rectified current. Substitute parts rated at 3 A represent a reduction in current capacity and are classified as similar substitutes rather than direct equivalents. Parts with 3 A ratings are suitable only when circuit design does not require the full 4 A capacity.

Technology & Speed: All substitutes maintain Schottky technology with fast recovery characteristics (≤ 500 ns, > 200 mA). This parameter is non-negotiable for functional equivalence.

Forward Voltage: Forward voltage characteristics at 3 A must not exceed 630 mV to maintain thermal and efficiency performance within acceptable ranges.

Package Compatibility: All substitutes use DO-214AB (SMC) surface mount packaging, ensuring mechanical and thermal compatibility with existing PCB layouts.

Compliance Status: The MBRS320T3 is RoHS non-compliant and obsolete. Active substitute parts are RoHS3 compliant, supporting modern manufacturing and environmental requirements.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent (Preferred): MBRS320T3G from onsemi is the primary substitute for the obsolete MBRS320T3. Both parts share identical voltage (20 V), forward voltage characteristics (500 mV @ 3 A), and reverse leakage specifications (2 mA @ 20 V). The MBRS320T3G is active in production with RoHS3 compliance and Cut Tape/Digi-Reel packaging availability. The only parameter difference is current rating (3 A vs. 4 A), which is acceptable for applications not requiring the full 4 A capacity of the original part.

Similar Substitutes (Voltage-Matched): SK32E3/TR13 (Microsemi) and SS32-E3/57T (Vishay) maintain the 20 V voltage rating and 3 A current rating with identical forward voltage characteristics. Both are RoHS3 compliant and active. These parts exhibit lower reverse leakage (500 µA @ 20 V) compared to the main part, representing improved performance characteristics. Operating temperature ranges differ slightly (−55°C to 125°C vs. −65°C to 150°C for MBRS320T3G), which may be relevant for extreme temperature applications.

Higher Voltage Substitute: STPS340S from STMicroelectronics provides 40 V reverse voltage rating with 3 A current capacity. This part is suitable for applications where higher voltage margin is required. Forward voltage is elevated at 630 mV @ 3 A, resulting in increased power dissipation. Reverse leakage is significantly lower (20 µA @ 40 V), indicating superior blocking characteristics. This substitute is appropriate only when circuit design accommodates the higher forward voltage drop.

Compliance Consideration: All substitute parts are RoHS3 compliant, supporting procurement requirements for modern manufacturing environments. The obsolete status of MBRS320T3 necessitates transition to an active substitute part for long-term supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can MBRS320T3G directly replace MBRS320T3 in all applications?

A: MBRS320T3G is a direct substitute for applications where the circuit design does not require the full 4 A current capacity of the original part. Both parts share identical voltage ratings (20 V), forward voltage characteristics (500 mV @ 3 A), and reverse leakage specifications (2 mA @ 20 V). If the circuit operates at or near 4 A, alternative parts with higher current ratings must be evaluated.

Q: What is the difference between the 20 V and 40 V rated substitutes?

A: STPS340S provides a 40 V reverse voltage rating compared to the 20 V rating of MBRS320T3. The higher voltage rating provides additional design margin for transient overvoltage conditions. However, STPS340S exhibits higher forward voltage (630 mV @ 3 A vs. 500 mV @ 3 A), resulting in increased power dissipation and heat generation. Selection depends on circuit voltage requirements and thermal constraints.

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

A: Yes, all substitute parts use DO-214AB (SMC) surface mount packaging, ensuring mechanical and thermal compatibility with existing PCB layouts. Packaging availability varies by supplier: MBRS320T3G is available in Cut Tape and Digi-Reel formats; SK32E3/TR13 and SS32-E3/57T are available in Cut Tape and Digi-Reel formats; STPS340S is available in Cut Tape and Digi-Reel formats.

Q: What is the significance of reverse leakage current differences?

A: Reverse leakage current affects standby power consumption and blocking performance. MBRS320T3 and MBRS320T3G specify 2 mA @ 20 V, while SK32E3/TR13 and SS32-E3/57T specify 500 µA @ 20 V. Lower reverse leakage (500 µA) represents improved blocking characteristics and reduced standby current. STPS340S specifies 20 µA @ 40 V, indicating superior blocking performance at higher voltage.

Q: Why is RoHS compliance important for this substitution?

A: The MBRS320T3 is RoHS non-compliant and obsolete. All substitute parts are RoHS3 compliant, meeting environmental and manufacturing standards required by modern supply chains. RoHS compliance ensures the part does not contain restricted substances and supports procurement policies for current manufacturing environments.

Q: Can STPS340S be used in circuits designed for 20 V operation?

A: STPS340S can be used in 20 V circuits as its 40 V rating provides overvoltage margin. However, the elevated forward voltage (630 mV @ 3 A) increases power dissipation compared to 20 V-rated parts (500 mV @ 3 A). Thermal analysis is required to confirm that increased heat generation does not exceed component or PCB thermal limits.

Q: What is the operating temperature range for each substitute?

A: MBRS320T3G operates from −65°C to 150°C (junction temperature). SK32E3/TR13 and SS32-E3/57T operate from −55°C to 125°C (junction temperature). STPS340S specifies a maximum junction temperature of 150°C. Selection depends on application temperature requirements; parts with narrower ranges may not be suitable for extreme temperature environments.