Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Diodes Incorporated B540C-13

Name: B540C-13
Brand: Diodes Incorporated
SKU: B540C-13
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: B540C-13

Manufacturer:: Diodes Incorporated

Category:: Single Diodes

Package:: DO-214AB, SMC

Datasheet:: B540C-13.pdf

Description:: DIODE SCHOTTKY 40V 5A SMC

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:6,995

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

B540C-13 from Diodes Incorporated is a 40 V, 5.0 A surface-mount Schottky barrier rectifier in SMC package, featuring 0.55 V max forward voltage at 5.0 A and 0.5 mA max reverse leakage at rated VR, optimized for low-voltage, high-frequency polarity protection and freewheeling in DC/DC converters and power supplies.

For engineers reviewing the B540C-13 datasheet, B540C-13 pinout, B540C-13 application, or B540C-13 equivalent, key selection criteria include its 40 V reverse blocking rating, low VF for reduced conduction loss, thermal resistance (RθJT = 10 °C/W), SMC package compatibility with automated assembly, and suitability for commercial-grade 150 °C junction operation.

Technical Context

This Schottky rectifier uses guard ring die construction to enhance transient robustness and suppress avalanche-induced failure during inductive switching events. Its low forward voltage drop and fast recovery (inherently <10 ns) stem from majority-carrier conduction, eliminating minority-carrier storage delay.

Designed for surface-mount use on FR-4 PCBs with defined copper pad heatsinking (8.0 mm²), it delivers 5.0 A average rectified current with derating above +25°C ambient-maintaining 3.0 A at +100°C per Figure 7-and supports peak surge currents up to 100 A (8.3 ms half-sine).

Key Specifications

Parameter	Value and Actual Design Meaning
VRRM	40 V - Maximum repetitive reverse voltage before breakdown; sets safe operating limit in 36 V nominal systems.
IO	5.0 A - Continuous average forward current at TA = +25°C with specified PCB heatsink; defines steady-state power handling.
VF Max	0.55 V @ 5.0 A - Peak forward voltage drop; determines conduction loss (≤2.75 W at full load) and thermal rise.
IR Max	0.5 mA @ 40 V, +25°C - Maximum reverse leakage; critical for low-power standby efficiency and voltage hold-up integrity.
RθJT	10 °C/W - Junction-to-terminal thermal resistance; enables direct thermal coupling to PCB copper for passive cooling.
CT	300 pF @ 4 V, 1 MHz - Junction capacitance; impacts high-frequency switching noise and EMI in SMPS output stages.

Pinout & Package

Package: SMC (DO-214AB), molded plastic body with matte tin-plated terminals, cathode indicated by band or notch, moisture sensitivity level 1 per J-STD-020, weight ≈0.21 g.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to input/source side of rectification path; must handle full IO and IFSM stress.
Cathode	Forward current exit / reverse blocking terminal	Connected to output/load side; cathode band identifies polarity for correct PCB layout and assembly.

Key Features

Feature	Design Value
Guard ring die construction	Improves surge immunity and prevents edge breakdown during voltage transients in inductive loads.
Low VF (0.55 V max)	Reduces power dissipation by >30% vs. comparable silicon diodes, enabling higher efficiency in 5–12 V DC/DC outputs.
Solderable matte tin finish	Ensures reliable reflow attachment per MIL-STD-202 Method 208; compatible with lead-free and RoHS-compliant processes.
JEDEC-qualified reliability	Meets AEC-Q stress test standards for commercial-grade high-reliability applications, including extended temperature cycling.

Applications

DC/DC Converter Output Rectification

Polarity Protection Circuit

Use Scenario: Used as secondary-side synchronous rectifier replacement in 5–12 V isolated flyback or buck-derived supplies.

IC Role / Device Role / Timing Role: Schottky rectifier providing unidirectional current flow with minimal forward loss and no reverse recovery tail.

Use Value: Enables >92% efficiency at 5 A load by limiting conduction loss to ≤2.75 W and reducing thermal stress on PCB copper.

Use Scenario: Placed in series with V_IN rail to prevent damage from reverse battery or supply connection.

IC Role / Device Role / Timing Role: Unidirectional current gate that blocks reverse voltage while passing forward current with low dropout.

Use Value: Adds ≤0.55 V system voltage drop and withstands 40 V reverse faults without latch-up or thermal runaway.

Freewheeling Diode in Motor Drivers

Input Protection in USB-PD and PMIC Circuits

Use Scenario: Connected across brushed DC motor windings or H-bridge low-side switches to clamp inductive kickback.

IC Role / Device Role / Timing Role: Fast-turn-off freewheeling path that dissipates stored inductive energy without voltage overshoot.

Use Value: Limits voltage spikes to ≤40 V using inherent low reverse recovery charge (Q_rr ≈ 0), protecting MOSFETs and drivers.

Use Scenario: Integrated into 5–20 V input rails of USB-C PD controllers or multi-rail PMICs to block backfeed.

IC Role / Device Role / Timing Role: Reverse-polarity safeguard ensuring only forward-biased current enters downstream regulators.

Use Value: Maintains <0.5 mA leakage at 20 V, preserving sleep-mode current budgets while surviving hot-swap transients.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SB540-E3/54	Same 40 V VRRM, 5 A IO, but VF = 0.55 V typ (not max); RθJA = 55 °C/W vs. 50 °C/W for B540C-13.	Higher thermal resistance limits sustained 5 A operation in compact layouts without enhanced copper.	Select when cost sensitivity outweighs marginal thermal margin; verify PCB copper area meets SB540's derating curve.
SS54	40 V VRRM, 5 A IO, VF = 0.55 V max, but RθJT = 12 °C/W and IR = 0.2 mA @ 25°C (tighter spec).	Lower leakage improves ultra-low-power hold-up, but slightly higher junction-to-terminal resistance reduces heatsink coupling efficiency.	Prefer for battery-backed or always-on systems where sub-µA standby loss matters more than peak thermal performance.

Compared with SB540-E3/54 and SS54, B540C-13 offers the lowest RθJT (10 °C/W) for direct PCB thermal transfer and guaranteed 0.55 V max VF-critical for consistent conduction loss budgeting in production power supplies.

Availability

B540C-13 is available at Aetrix Electronics and suitable for DC/DC converter output rectification, polarity protection circuits, freewheeling diode applications, and USB-PD input protection requiring stable component supply and JEDEC-qualified commercial reliability.

Supply support for B540C-13 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-efficiency power management, signal integrity, and protection solutions for commercial and industrial markets.

The B540C-13 belongs to the B520C–B560C Schottky rectifier family, engineered for low-loss, high-reliability rectification in space-constrained, thermally demanding power conversion and protection circuits.

FAQ

Is B540C-13 suitable for automotive applications?

No-B540C-13 is qualified for commercial-grade reliability per JEDEC standards, not AEC-Q200. For automotive use, Diodes offers the pin- and spec-compatible B540CQ-13, which undergoes additional temperature cycling, humidity, and vibration testing per AEC-Q200 requirements.

What is the maximum allowable junction temperature for continuous operation?

The absolute maximum junction temperature is +150°C. Continuous operation at this temperature requires strict adherence to the derating curve in Figure 7: at +100°C ambient, IO must be reduced to 3.0 A with the specified 8.0 mm² copper pad heatsink to maintain TJ ≤ +150°C.

Does B540C-13 have a specified reverse recovery time (t_rr)?

No-Schottky diodes like B540C-13 are majority-carrier devices with no minority-carrier storage, so t_rr is not defined. Its effective switching speed is limited only by junction capacitance (300 pF) and circuit inductance, enabling clean turn-off in high-frequency SMPS designs.

Can B540C-13 be used in parallel for higher current handling?

Not recommended without external balancing-its VF tolerance (0.475–0.55 V) and thermal coupling variation cause current imbalance. Parallel operation risks thermal runaway unless matched units with individual current-sense resistors and active thermal monitoring are implemented.

B540C-13 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: DO-214AB, SMC

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Technology:: Schottky

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

Current - Average Rectified (Io):: 5A

Voltage - Forward (Vf) (Max) @ If:: 550 mV @ 5 A

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

Reverse Recovery Time (trr):: -

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

Capacitance @ Vr, F:: 300pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SMC

Operating Temperature - Junction:: -55°C ~ 125°C

B540C-13 FAQ

1.How can I place an order for B540C-13 through Aetrix?

Please submit a Request for Quotation (RFQ) for B540C-13 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 B540C-13 reliable?

The price and inventory of B540C-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for B540C-13 is usually 5 days.

3.What payment methods are accepted for B540C-13?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for B540C-13 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for B540C-13?

B540C-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your B540C-13 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 B540C-13?

For technical support, including B540C-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your B540C-13 requirements.

6.How does Aetrix verify that B540C-13 is sourced from the original manufacturer or authorized distributors?

All B540C-13 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 B540C-13 meets industry standards.

7.What is the process for return or replacement of B540C-13?

All B540C-13 units undergo pre-shipment inspection (PSI). If there is an issue with B540C-13, 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 B540C-13 part is unused and in its original packaging.

Return procedure for B540C-13:

1.Submit a request within 90 days.

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

Tech Hub

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…

2026-08-11 LDO Regulator: Dropout Voltage, Noise, PSRR and Power Dissipation

LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…

2026-08-06 Conditional Access Module: CAM, CI/CI+ and DVB Security

Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…

2026-08-03 Electronic Component Obsolescence: EOL Risks, Replacement Options and Last-Time Buy Strategy

Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.

2026-07-29 18650 Battery: Voltage, Capacity, Charging and Pack Design

18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…

2026-07-27 Hall Effect Sensor: Working Principle, Types, Circuits and Applications

Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…

2026-07-20 Product Change Notification (PCN) in Electronic Components: Meaning and Supply Chain Response

Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…

2026-07-19 Blend Door Actuator: Symptoms, Location, Reset and Replacement Guide

A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…