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

Diodes Incorporated B340A-13-F

Name: B340A-13-F
Brand: Diodes Incorporated
SKU: B340A-13-F
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: B340A-13-F

Manufacturer:: Diodes Incorporated

Category:: Single Diodes

Package:: DO-214AC, SMA

Datasheet:: B340A-13-F.pdf

Description:: DIODE SCHOTTKY 40V 3A SMA

Quantity:: RFQ Add To RFQ list

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Inventory:45,688

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Product details

Overview

B340A-13-F from Diodes Incorporated is a 40 V, 3.0 A surface-mount Schottky barrier rectifier in SMA package, featuring 0.50 V max forward voltage at 3 A and 0.5 mA max reverse leakage at rated V_RRM, optimized for low-loss DC-DC conversion and polarity protection in space-constrained power supplies.

For engineers reviewing the B340A-13-F datasheet, B340A-13-F pinout, B340A-13-F application, or B340A-13-F equivalent, key selection criteria include its 40 V reverse blocking rating, thermal resistance (R_θJA = 140 °C/W on FR-4), cathode-band polarity marking, and AEC-Q101 qualification for automotive-grade reliability.

Technical Context

This Schottky rectifier uses guard ring die construction to suppress transient-induced avalanche breakdown, enabling robust operation in high-frequency switching environments. Its low forward voltage drop minimizes conduction loss, while the 200 pF junction capacitance supports efficient performance up to several MHz in buck converter freewheeling paths.

The device operates across –55 °C to +150 °C junction temperature range and delivers 80 A non-repetitive surge current capability. Thermal design relies on its 25 °C/W junction-to-terminal resistance and defined pad layout per AP02001 for stable power dissipation up to 850 mW at +25 °C ambient.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	40 V - Maximum repetitive reverse voltage before breakdown; sets upper limit for DC bus or output rail protection.
I_O	3.0 A - Average rectified output current at T_T = +100 °C; defines continuous DC current handling in thermal-limited designs.
V_F (max)	0.50 V @ 3 A - Peak forward voltage drop; directly determines conduction loss (P_cond ≈ 1.5 W at full load).
I_R (max)	0.5 mA @ 40 V - Reverse leakage at rated voltage and +25 °C; critical for low-power standby efficiency.
C_T	200 pF @ 4 V, 1 MHz - Junction capacitance; influences high-frequency switching noise and snubber design.
R_θJA	140 °C/W - Thermal resistance junction-to-ambient on FR-4 PCB; used to calculate temperature rise under steady-state power dissipation.
Package	SMA - Surface-mount plastic package with cathode band marking; compatible with standard reflow profiles and automated pick-and-place.

Pinout & Package

SMA package: molded plastic case, UL 94V-0 rated, lead-free matte-tin terminals, cathode band polarity indicator, weight ≈ 0.064 g.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential side (e.g., switch node in buck converter); must handle full 3 A DC and 80 A surge.
Cathode	Forward current exit / reverse-blocking terminal	Marked by band; ties to output rail or ground return; reverse voltage applied here during off-state.

Key Features

Feature	Design Value
Guard ring die construction	Suppresses edge breakdown during voltage transients, improving reliability in noisy DC-DC environments.
AEC-Q101 qualification	Validated for automotive applications including engine control modules and body electronics requiring extended temperature and life-cycle stability.
Low VF (0.50 V max)	Reduces conduction loss by ~30% vs. comparable silicon diodes, enabling higher efficiency in 3–12 V input converters.
Lead-free & halogen-free	Complies with RoHS 2 and JEDEC J-STD-020 moisture sensitivity Level 1, supporting green manufacturing and reflow compatibility.

Applications

Automotive Body Control Module

Industrial DC-DC Converter

Use Scenario: Reverse polarity protection on 12 V battery-fed microcontroller power rails.

IC Role / Device Role / Timing Role: Unidirectional current gate preventing damage from accidental battery reversal.

Use Value: 0.50 V forward drop limits voltage loss to <5% at 3 A, preserving MCU brown-out margin while surviving 80 A jump-start surges.

Use Scenario: Freewheeling path in 5 V/3 A synchronous buck regulator for PLC I/O modules.

IC Role / Device Role / Timing Role: Low-loss续流 diode replacing MOSFET body diode during low-side switch off-time.

Use Value: 200 pF capacitance and fast recovery minimize switching node ringing, reducing EMI filter burden in industrial EMC-compliant designs.

USB-C Power Delivery Adapter

Medical Portable Monitor Power Supply

Use Scenario: Output rectification in compact 20 W GaN-based AC-DC adapter.

IC Role / Device Role / Timing Role: High-frequency output diode operating at >100 kHz switching frequency.

Use Value: SMA footprint enables dense layout; 140 °C/W R_θJA allows thermal management without heatsink in 50 mm² board area.

Use Scenario: Input-stage polarity protection for isolated 5 V/2 A SMPS powering display and sensor subsystems.

IC Role / Device Role / Timing Role: Fail-safe blocking element ensuring no reverse current flows into primary-side controller during field service.

Use Value: 0.5 mA leakage at +100 °C ensures <10 µW standby loss, meeting IEC 60601-1 energy efficiency requirements.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SS34 (Micro Commercial Components)	Same 40 V V_RRM, 3 A I_O, but VF = 0.55 V max @ 3 A; R_θJA = 160 °C/W.	Lacks AEC-Q101 qualification; not recommended for automotive under-hood use.	Select when cost sensitivity outweighs thermal margin and automotive compliance.
SB340 (ON Semiconductor)	Identical electrical specs (40 V, 3 A, 0.50 V VF), but TO-277 package (3-lead) instead of SMA.	Requires different footprint and stencil; higher profile may conflict with enclosure height constraints.	Choose only if existing TO-277 assembly infrastructure exists and board height permits.

Compared with SS34 and SB340, B340A-13-F offers superior thermal performance (140 vs. 160 °C/W), automotive qualification, and standardized SMA footprint-making it optimal for new designs prioritizing reliability, density, and qualification traceability.

Availability

B340A-13-F is available at Aetrix Electronics and suitable for automotive body electronics, industrial DC-DC converters, and USB-C power adapters requiring stable component supply and long-term lifecycle support.

Supply support for B340A-13-F 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management and signal integrity solutions.

The B3xxA series belongs to Diodes' Schottky rectifier product line, engineered for high-efficiency, low-voltage power conversion in automotive, industrial, and consumer power supplies where low VF and fast switching are essential.

FAQ

What is the maximum junction temperature for continuous operation?

The B340A-13-F supports continuous operation up to +150 °C junction temperature, with derating beginning above +100 °C ambient per the forward current derating curve (Figure 6). At +100 °C terminal temperature, its rated average current remains 3.0 A, confirmed by thermal testing on standard FR-4 PCB with minimum pad layout.

Is this part suitable for reflow soldering, and what profile is recommended?

Yes, B340A-13-F is qualified for lead-free reflow soldering per JEDEC J-STD-020 Level 1. Diodes recommends peak temperatures ≤260 °C for ≤10 seconds, with ramp rates ≤3 °C/s pre- and post-peak. The matte-tin finish ensures reliable wetting and intermetallic formation without voiding on standard SAC305 paste.

Does the cathode band indicate pin 1 or polarity orientation?

The cathode band marks the cathode terminal-not pin 1-and indicates the direction of forward current flow (anode to cathode). In SMA package orientation, the band aligns with the cathode end of the die; schematic symbols must reflect this polarity to prevent reverse-bias failure during operation.

How does its surge current rating compare to similar Schottky diodes?

B340A-13-F sustains 80 A non-repetitive peak forward surge current (I_FSM) for 8.3 ms half-sine wave, exceeding typical 60–70 A ratings of competing 3 A Schottkys. This margin accommodates cold-crank pulses in automotive 12 V systems and inrush events in industrial power-up sequences without degradation.

B340A-13-F Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: DO-214AC, SMA

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Schottky

Voltage - DC Reverse (Vr) (Max):: 40 V

Current - Average Rectified (Io):: 3A

Voltage - Forward (Vf) (Max) @ If:: 500 mV @ 3 A

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 500 µA @ 40 V

Capacitance @ Vr, F:: 200pF @ 4V, 1MHz

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: SMA

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

B340A-13-F FAQ

1.How can I place an order for B340A-13-F through Aetrix?

Please submit a Request for Quotation (RFQ) for B340A-13-F 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 B340A-13-F reliable?

The price and inventory of B340A-13-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for B340A-13-F is usually 5 days.

3.What payment methods are accepted for B340A-13-F?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for B340A-13-F transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for B340A-13-F?

B340A-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your B340A-13-F 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 B340A-13-F?

For technical support, including B340A-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your B340A-13-F requirements.

6.How does Aetrix verify that B340A-13-F is sourced from the original manufacturer or authorized distributors?

All B340A-13-F 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 B340A-13-F meets industry standards.

7.What is the process for return or replacement of B340A-13-F?

All B340A-13-F units undergo pre-shipment inspection (PSI). If there is an issue with B340A-13-F, 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 B340A-13-F part is unused and in its original packaging.

Return procedure for B340A-13-F:

1.Submit a request within 90 days.

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

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