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

Diodes Incorporated B120-13-F

Name: B120-13-F
Brand: Diodes Incorporated
SKU: B120-13-F
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: B120-13-F

Manufacturer:: Diodes Incorporated

Category:: Single Diodes

Package:: DO-214AC, SMA

Datasheet:: B120-13-F.pdf

Description:: DIODE SCHOTTKY 20V 1A SMA

Quantity:: RFQ Add To RFQ list

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Inventory:13,819

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Product details

Overview

B120-13-F from Diodes Incorporated is a 1.0A surface-mount Schottky barrier rectifier with 20V peak repetitive reverse voltage (V_RRM), 0.5V maximum forward voltage at 1.0A, and 0.5mA maximum reverse leakage current at 25°C. It features guard ring die construction for transient protection and is optimized for low-voltage, high-frequency polarity protection and freewheeling in DC power rails.

For engineers reviewing the B120-13-F datasheet, B120-13-F pinout, B120-13-F application, or B120-13-F equivalent, key selection criteria include its 20V blocking rating, 30A non-repetitive surge capability, SMA package thermal resistance of 20°C/W, RoHS-compliant matte tin plating, and suitability for automated SMT assembly in space-constrained consumer and industrial power supplies.

Technical Context

This Schottky diode operates via majority-carrier conduction, eliminating minority-carrier storage delay and enabling high-frequency switching up to several MHz. Its low 0.5V forward drop minimizes conduction loss in 3.3V–5V input rails, while the guard ring structure enhances ruggedness against voltage transients during load dump or inductive kick events.

The device is rated for continuous operation at junction temperatures up to +150°C and derates linearly above +130°C terminal temperature. With 110pF typical junction capacitance at 4V reverse bias, it supports fast recovery in flyback snubbers and reverse-polarity protection circuits where capacitive loading must remain low.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	20 V - Maximum DC or peak AC reverse voltage the diode blocks without breakdown in normal operation.
I_O	1.0 A - Average rectified forward current at T_T = +130°C, defining continuous power handling in PCB-mounted thermal conditions.
V_F max	0.5 V @ I_F = 1.0A - Forward voltage drop determining conduction loss (0.5W at 1A), critical for efficiency in low-voltage DC/DC outputs.
I_R max	0.5 mA @ V_R = 20V, T_A = +25°C - Reverse leakage limiting standby power loss in battery-backed or always-on circuits.
I_FSM	30 A @ 8.3ms half-sine - Surge rating enabling survival of inrush currents in capacitor-input filters or motor commutation spikes.
R_θJT	20 °C/W - Junction-to-terminal thermal resistance with 5.0mm² copper pad, guiding minimum PCB copper area for thermal management.
C_T	110 pF @ V_R = 4V, f = 1MHz - Junction capacitance affecting high-frequency impedance and EMI filtering performance in switching nodes.

Pinout & Package

Package: SMA (DO-214AC), molded plastic body with UL 94V-0 flammability rating, cathode indicated by band on body. Terminal plating: lead-free matte tin, solderable per MIL-STD-202 Method 208.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential side (e.g., ground or return path) in polarity protection; accepts surge current during reverse-bias fault.
Cathode	Forward current exit point	Connected to positive supply rail; carries full load current and defines reverse-blocking node in freewheeling paths.

Key Features

Feature	Design Value
Guard ring die construction	Enhances transient voltage immunity (e.g., ISO 7637-2 pulse 1/2a) without external TVS, reducing BOM count in automotive accessory modules.
Low V_F (0.5V @ 1A)	Reduces power dissipation by >40% vs. comparable PN diodes, enabling smaller heatsinking in compact USB-C PD adapters.
30A surge rating	Withstands capacitor charging surges in 12V input systems without derating, supporting single-diode solutions in cost-sensitive industrial SMPS.
RoHS & Halogen-Free	Meets IPC-1752A material declaration requirements and EU Directive 2015/863/EU, simplifying compliance reporting for global OEMs.

Applications

USB Power Delivery Input Protection

Industrial PLC Digital I/O Protection

Use Scenario: Prevents damage from reversed USB-C cable insertion in 5V/9V/15V PD source designs.

IC Role / Device Role / Timing Role: Polarity protection diode placed between connector and buck converter input.

Use Value: 0.5V V_F limits voltage drop to <3% at 1A, preserving regulation margin; 20V V_RRM exceeds PD 3.1 max bus voltage (28V).

Use Scenario: Shields 24V digital input channels from field-wiring errors in programmable logic controllers.

IC Role / Device Role / Timing Role: Reverse-polarity clamp on optocoupler input side.

Use Value: 30A I_FSM survives accidental 24V short-to-ground events; SMA footprint fits dense I/O module layouts.

DC Motor Freewheeling

Low-Voltage DC/DC Converter Output Rectification

Use Scenario: Suppresses inductive kickback during PWM-controlled brushed DC motor turn-off.

IC Role / Device Role / Timing Role: Freewheeling diode across motor terminals.

Use Value: Fast majority-carrier response eliminates tail current, reducing MOSFET switching loss; 110pF C_T minimizes high-frequency ringing.

Use Scenario: Output rectifier in 3.3V synchronous buck converter where secondary-side FET is omitted.

IC Role / Device Role / Timing Role: Uncontrolled rectifier in non-synchronous topology.

Use Value: 0.5V V_F enables >92% efficiency at 1A load; 1.0A I_O rating matches typical microcontroller power rail requirements.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SB120-E3/52T	Same 20V V_RRM, 1.0A I_O, but SMB package (higher thermal mass, R_θJT = 15°C/W), VF = 0.55V @ 1A.	Better thermal performance in high-ambient environments; larger footprint limits use in ultra-compact USB-C ports.	Select when board-level thermal resistance exceeds 30°C/W and SMB mounting is acceptable.
SS12	20V V_RRM, 1.0A I_O, SMA package, but VF = 0.52V @ 1A and IR = 1.0mA @ 25°C - higher leakage.	Higher leakage may increase standby current in battery-powered IoT sensors; otherwise functionally interchangeable.	Prefer only if existing design uses SS12 footprint and leakage sensitivity is low.

Compared with SB120-E3/52T and SS12, B120-13-F offers the lowest forward voltage (0.5V) in SMA format and tightest leakage spec (0.5mA), making it optimal for efficiency-critical, space-constrained 5V rail protection where thermal headroom is moderate.

Availability

B120-13-F is available at Aetrix Electronics and suitable for USB power delivery input protection, industrial PLC digital I/O protection, and DC motor freewheeling requiring stable component supply and consistent RoHS-compliant manufacturing.

Supply support for B120-13-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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.

The B120/B series belongs to Diodes' general-purpose Schottky rectifier product line, engineered specifically for commercial-grade power conversion and protection in cost-sensitive, high-volume applications such as consumer adapters and industrial controls.

FAQ

What is the maximum junction temperature for continuous operation of B120-13-F?

The B120-13-F has an operating junction temperature range of –65°C to +150°C. Continuous operation at full 1.0A average current requires terminal temperature ≤+130°C, with linear derating to zero current at +150°C. Thermal design must ensure R_θJT × P_D + T_A stays within this limit.

Is B120-13-F suitable for automotive applications?

B120-13-F is not AEC-Q101 qualified and is intended for commercial-grade applications. For automotive use, Diodes offers the B120Q-13-F variant (AEC-Q101 qualified, PPAP-capable), which shares identical electrical specs but undergoes additional stress testing and is manufactured in IATF 16949-certified facilities.

How does the guard ring construction improve reliability?

The guard ring die structure surrounds the active junction with a doped region that redistributes electric field lines during overvoltage transients, preventing localized avalanche breakdown. This increases the device's immunity to ISO 7637-2 pulse 1 (inductive load dump) and extends lifetime in noisy industrial environments without adding external protection components.

Can B120-13-F replace a standard PN rectifier like 1N4001 in a 5V power supply?

Yes - B120-13-F can replace 1N4001 in low-voltage, high-efficiency applications: its 0.5V V_F cuts conduction loss by ~65% versus 1N4001's ~0.95V, and its 30A surge rating exceeds 1N4001's 30A peak. However, its 20V V_RRM is lower than 1N4001's 50V, so verify reverse voltage margins in the target circuit.

B120-13-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):: 20 V

Current - Average Rectified (Io):: 1A

Voltage - Forward (Vf) (Max) @ If:: 500 mV @ 1 A

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 500 µA @ 20 V

Capacitance @ Vr, F:: 110pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SMA

Operating Temperature - Junction:: -65°C ~ 150°C

B120-13-F FAQ

1.How can I place an order for B120-13-F through Aetrix?

Please submit a Request for Quotation (RFQ) for B120-13-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 B120-13-F reliable?

The price and inventory of B120-13-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for B120-13-F is usually 5 days.

3.What payment methods are accepted for B120-13-F?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for B120-13-F transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for B120-13-F?

B120-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your B120-13-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 B120-13-F?

For technical support, including B120-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your B120-13-F requirements.

6.How does Aetrix verify that B120-13-F is sourced from the original manufacturer or authorized distributors?

All B120-13-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 B120-13-F meets industry standards.

7.What is the process for return or replacement of B120-13-F?

All B120-13-F units undergo pre-shipment inspection (PSI). If there is an issue with B120-13-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 B120-13-F part is unused and in its original packaging.

Return procedure for B120-13-F:

1.Submit a request within 90 days.

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

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