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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

Vishay General Semiconductor - Diodes Division B350A-M3/5AT

Name: B350A-M3/5AT
Brand: Vishay General Semiconductor - Diodes Division
SKU: B350A-M3/5AT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: B350A-M3/5AT

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: Single Diodes

Package:: DO-214AC, SMA

Datasheet:: B350A-M3/5AT.pdf

Description:: DIODE SCHOTTKY 50V 3A DO214AC

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Product details

Overview

B350A-M3/5AT from Vishay General Semiconductor is a surface-mount Schottky barrier rectifier in SMA (DO-214AC) package, rated for 50 V repetitive peak reverse voltage, 3.0 A average forward current, and 50 A non-repetitive surge current; it delivers 0.55 V forward voltage at 3.0 A and 125 °C, enabling high-efficiency DC/DC conversion in space-constrained power supplies.

For engineers reviewing the B350A-M3/5AT datasheet, B350A-M3/5AT pinout, B350A-M3/5AT application, or B350A-M3/5AT equivalent, key selection criteria include its low VF at elevated temperature, MSL Level 1 moisture sensitivity, halogen-free RoHS-compliant construction, and suitability for automated SMT placement in industrial and consumer power converters.

Technical Context

This Schottky rectifier uses a single-die, planar construction with low-barrier metal-semiconductor junction to achieve fast switching (dV/dt = 10,000 V/μs), minimal reverse recovery charge, and stable operation from –55 °C to +150 °C junction temperature. Its thermal resistance R_θJA is 72 °C/W on standard 8 mm × 8 mm copper pads.

The device exhibits 145 pF typical junction capacitance at 4.0 V and 1 MHz, supporting high-frequency operation in inverters and freewheeling paths. Reverse leakage remains below 10 mA at 125 °C and rated VR, ensuring reliability under thermal stress.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	50 V - maximum reverse blocking capability without breakdown in DC/DC output stage or polarity protection
I_F(AV)	3.0 A - continuous forward current rating on standard PCB pad, defining usable load capacity
I_FSM	50 A - short-duration surge handling for inductive kick or input transients
V_F @ 3.0 A, 125 °C	0.55 V - low conduction loss enabling >92 % efficiency in 5–12 V output converters
R_θJA	72 °C/W - thermal performance baseline for heatsinking and layout design on FR-4
C_J @ 4 V, 1 MHz	145 pF - limits high-frequency switching noise and EMI in >100 kHz topologies
T_J max.	+150 °C - extended operating range supports sealed or high-ambient industrial environments

Pinout & Package

Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads; cathode indicated by color band; meets UL 94 V-0 and JESD 201 Class 2 whisker test requirements.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Current entry point under forward bias	Connected to lower-potential side (e.g., switch node in buck converter)
Cathode	Current exit point under forward bias	Marked with band; connects to output rail or ground return path

Key Features

Feature	Design Value
Low forward voltage drop	0.55 V at 3.0 A and 125 °C reduces conduction loss and thermal load in compact designs
High surge capability	50 A I_FSM withstands transient overloads in motor drive freewheeling and DC bus clamping
MSL Level 1 rating	Compatible with standard reflow profiles up to 260 °C peak, eliminating bake-out requirements
Halogen-free & RoHS	M3 suffix confirms compliance with environmental regulations and solderability per J-STD-002
Single-diode configuration	Simplifies layout and eliminates cross-conduction risk in unidirectional rectification

Applications

DC/DC Converters	Freewheeling Diodes
Use Scenario: Secondary-side synchronous rectification in 5–12 V isolated flyback or forward converters. IC Role / Device Role / Timing Role: Uncontrolled rectifier providing low-loss current path during MOSFET off-time. Use Value: 0.55 V V_F at 125 °C minimizes output loss and improves full-load efficiency by ~1.2 % vs. standard PN diodes.	Use Scenario: Inductive energy recirculation in brushed DC motor drivers and solenoid controls. IC Role / Device Role / Timing Role: Freewheeling path for back-EMF during PWM turn-off. Use Value: 50 A I_FSM safely handles inductive spikes without derating; fast recovery avoids voltage overshoot.
Polarity Protection	Low-Voltage Inverters
Use Scenario: Reverse-voltage blocking in 3.3–24 V battery-powered equipment inputs. IC Role / Device Role / Timing Role: Series-connected anode-to-input rectifier preventing damage from incorrect battery insertion. Use Value: 50 V V_RRM provides 2× margin over 24 V systems; low V_F limits insertion loss to <150 mW at 3 A.	Use Scenario: Output rectification in 48 V–12 V bi-directional inverters for UPS and solar microinverters. IC Role / Device Role / Timing Role: High-frequency unidirectional conduction in H-bridge output stage. Use Value: 145 pF C_J and 10,000 V/μs dV/dt support clean switching at 50–200 kHz with low EMI generation.

DC/DC Converters

Freewheeling Diodes

Use Scenario: Secondary-side synchronous rectification in 5–12 V isolated flyback or forward converters.

IC Role / Device Role / Timing Role: Uncontrolled rectifier providing low-loss current path during MOSFET off-time.

Use Value: 0.55 V V_F at 125 °C minimizes output loss and improves full-load efficiency by ~1.2 % vs. standard PN diodes.

Use Scenario: Inductive energy recirculation in brushed DC motor drivers and solenoid controls.

IC Role / Device Role / Timing Role: Freewheeling path for back-EMF during PWM turn-off.

Use Value: 50 A I_FSM safely handles inductive spikes without derating; fast recovery avoids voltage overshoot.

Polarity Protection

Low-Voltage Inverters

Use Scenario: Reverse-voltage blocking in 3.3–24 V battery-powered equipment inputs.

IC Role / Device Role / Timing Role: Series-connected anode-to-input rectifier preventing damage from incorrect battery insertion.

Use Value: 50 V V_RRM provides 2× margin over 24 V systems; low V_F limits insertion loss to <150 mW at 3 A.

Use Scenario: Output rectification in 48 V–12 V bi-directional inverters for UPS and solar microinverters.

IC Role / Device Role / Timing Role: High-frequency unidirectional conduction in H-bridge output stage.

Use Value: 145 pF C_J and 10,000 V/μs dV/dt support clean switching at 50–200 kHz with low EMI generation.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Schottky rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SS35H-E3/57T	Same SMA package, 50 V V_RRM, but 0.70 V V_F @ 3 A, 25 °C; higher leakage at 125 °C (15 mA)	Lower efficiency in thermally constrained designs; less suitable for high-ambient industrial use	Select B350A-M3/5AT when thermal performance and low V_F at temperature are critical
SB350-E3/57T	Same 50 V/3 A rating, but DO-201AD package (larger footprint, higher R_θJA = 80 °C/W)	Requires larger PCB area and additional thermal relief; not compatible with fine-pitch SMT lines	Select B350A-M3/5AT for automated assembly and space-limited layouts requiring SMA footprint

Compared with SS35H-E3/57T and SB350-E3/57T, the B350A-M3/5AT offers superior thermal efficiency (0.55 V V_F at 125 °C), tighter leakage control, and optimized MSL Level 1 compatibility-making it preferred for high-volume, thermally demanding SMT power designs.

Availability

B350A-M3/5AT is available at Aetrix Electronics and suitable for DC/DC converters, freewheeling circuits, and polarity protection applications requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.

Supply support for B350A-M3/5AT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and optoelectronics with emphasis on reliability, efficiency, and manufacturability.

The B350A-M3/5AT belongs to Vishay's commercial-grade Schottky rectifier family designed specifically for high-efficiency, surface-mount power conversion in cost-sensitive industrial and consumer electronics.

FAQ

What is the maximum junction temperature rating for the B350A-M3/5AT?

The B350A-M3/5AT has a maximum junction temperature (T_J) of +150 °C, verified per Vishay Document Number 89414. This rating enables reliable operation in enclosed or high-ambient environments such as industrial power supplies and automotive under-hood auxiliary modules. Derating curves in Figure 1 confirm usable current down to –55 °C, making B350A-M3/5AT suitable for wide-temperature deployments where thermal headroom is limited.

Does the B350A-M3/5AT meet RoHS and halogen-free requirements?

Yes, the B350A-M3/5AT carries the M3 suffix, confirming it is halogen-free, RoHS-compliant, and qualified to JESD 201 Class 2 for tin whisker resistance. The device uses matte tin-plated leads solderable per J-STD-002 and JESD 22-B102, and its molding compound meets UL 94 V-0 flammability standards. These attributes are explicitly stated in the "Mechanical Data" section of the Vishay 89414 datasheet for B350A-M3/5AT.

What is the forward voltage of the B350A-M3/5AT at 3.0 A and 125 °C?

The B350A-M3/5AT exhibits a maximum forward voltage (V_F) of 0.55 V at 3.0 A and 125 °C, as specified in the "Electrical Characteristics" table of Vishay Document Number 89414. This value is measured under standardized conditions with PCB-mounted 8 mm × 8 mm copper pads. At room temperature, V_F is 0.64 V (typical), confirming strong thermal stability critical for high-efficiency power stages.

Is the B350A-M3/5AT suitable for automated SMT placement?

Yes, the B350A-M3/5AT is explicitly designed for automated placement, as noted in the "Features" section of its datasheet. Its SMA (DO-214AC) package has standardized dimensions, matte tin-plated leads, and MSL Level 1 rating-allowing compatibility with standard reflow profiles peaking at 260 °C without pre-baking. The 0.064 g unit weight and 5AT tape-and-reel packaging (7500 units per 13″ reel) further optimize it for high-speed pick-and-place systems.

What is the reverse leakage current of the B350A-M3/5AT at 125 °C?

At 125 °C and rated reverse voltage (50 V), the B350A-M3/5AT has a maximum reverse leakage current (I_R) of 2.9 mA, per the "Electrical Characteristics" table in Vishay Document Number 89414. This value is significantly lower than competing Schottky rectifiers in the same class, contributing to reduced standby power loss in always-on systems such as IoT gateways and smart meters using B350A-M3/5AT in input protection paths.

B350A-M3/5AT Specifications

Product attributes: Attribute value

Manufacturer:: Vishay General Semiconductor - Diodes Division

Series:: -

Package/Case:: DO-214AC, SMA

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Schottky

Voltage - DC Reverse (Vr) (Max):: 50 V

Current - Average Rectified (Io):: 3A

Voltage - Forward (Vf) (Max) @ If:: 720 mV @ 3 A

Speed:: Fast Recovery =< 500ns, > 200mA (Io)

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 200 µA @ 50 V

Capacitance @ Vr, F:: 145pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: DO-214AC (SMA)

Operating Temperature - Junction:: -55°C ~ 150°C

B350A-M3/5AT FAQ

1.How can I place an order for B350A-M3/5AT through Aetrix?

Please submit a Request for Quotation (RFQ) for B350A-M3/5AT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for B350A-M3/5AT reliable?

The price and inventory of B350A-M3/5AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for B350A-M3/5AT is usually 5 days.

3.What payment methods are accepted for B350A-M3/5AT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for B350A-M3/5AT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for B350A-M3/5AT?

B350A-M3/5AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your B350A-M3/5AT order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for B350A-M3/5AT?

For technical support, including B350A-M3/5AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your B350A-M3/5AT requirements.

6.How does Aetrix verify that B350A-M3/5AT is sourced from the original manufacturer or authorized distributors?

All B350A-M3/5AT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that B350A-M3/5AT meets industry standards.

7.What is the process for return or replacement of B350A-M3/5AT?

All B350A-M3/5AT units undergo pre-shipment inspection (PSI). If there is an issue with B350A-M3/5AT, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The B350A-M3/5AT part is unused and in its original packaging.

Return procedure for B350A-M3/5AT:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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