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

Diodes Incorporated B140Q-13-F

Name: B140Q-13-F
Brand: Diodes Incorporated
SKU: B140Q-13-F
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: B140Q-13-F

Manufacturer:: Diodes Incorporated

Category:: Single Diodes

Package:: DO-214AC, SMA

Datasheet:: B140Q-13-F.pdf

Description:: DIODE SCHOTTKY 40V 1A SMA

Quantity:: RFQ Add To RFQ list

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Inventory:37,067

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Product details

Overview

B140Q-13-F from Diodes Incorporated is a 40 V, 1.0 A surface-mount Schottky barrier rectifier in SMA package, featuring 0.5 V forward voltage at 1.0 A and 0.5 mA reverse leakage at rated voltage and +25°C. It delivers low power loss for DC-DC converters, polarity protection circuits, and freewheeling paths in automotive and industrial power supplies.

For engineers reviewing the B140Q-13-F datasheet, B140Q-13-F pinout, B140Q-13-F application, or B140Q-13-F equivalent, this part supports high-efficiency, low-voltage (<40 V), high-frequency rectification with AEC-Q101 qualification, RoHS-compliant lead-free plating, and transient robustness via guard ring die construction.

Technical Context

This Schottky diode operates as a unidirectional, low-VF rectifier optimized for switching-mode power conversion where fast recovery (12 ns t_RR) and minimal conduction loss are critical. Its junction-to-ambient thermal resistance is 115 °C/W on standard FR-4 PCB and drops to 65 °C/W with a 50 mm × 50 mm × 23 mm aluminum heatsink.

The device uses guard ring die construction to enhance surge immunity-rated for 30 A non-repetitive peak forward surge current-and exhibits stable reverse characteristics up to 150 °C junction temperature, with IR rising to 10 mA at +100°C under rated VR.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	40 V - Maximum repetitive reverse blocking voltage; sets upper limit for DC bus or flyback clamp voltage rating.
I_O	1.0 A - Average rectified output current at T_T = +130°C; defines continuous conduction capability in steady-state operation.
V_F Max	0.5 V @ I_F = 1.0 A - Low forward drop reduces conduction loss by ~50% vs. silicon PN diodes, improving efficiency in 3.3–12 V systems.
I_R Max	0.5 mA @ V_R = 40 V, T_A = +25°C - Low leakage preserves battery life and minimizes standby power in always-on circuits.
t_RR	12 ns - Ultrafast reverse recovery enables use in >100 kHz SMPS without snubber networks or excessive EMI.
R_θJA	115 °C/W - Thermal resistance on standard 1 oz. FR-4 board; determines required PCB copper area for thermal management.
I_FSM	30 A - Surge rating allows safe handling of inductive kickback in motor drives and relay coils without derating.

Pinout & Package

Package: SMA (DO-214AC), molded plastic case with UL 94V-0 flammability rating, cathode indicated by band, matte tin-plated terminals solderable per MIL-STD-202 Method 208.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Current entry terminal during forward conduction	Connected to lower-potential side (e.g., ground or return path) in polarity protection; must handle full load current and surge.
Cathode	Current exit terminal during forward conduction; marked with band	Connected to higher-potential side (e.g., input rail); reverse-biased during off-state to block voltage up to 40 V.

Key Features

Feature	Design Value
Guard ring die construction	Enables 4 kV HBM ESD tolerance and robustness against voltage transients in automotive load-dump environments.
AEC-Q101 qualification	Validated for automotive-grade reliability including temperature cycling, humidity bias, and high-temperature operating life.
Lead-free, halogen-free "Green" finish	Meets RoHS 3 (2015/863/EU) and JEDEC J-STD-020 Level 1 moisture sensitivity requirements for reflow compatibility.
Low thermal resistance design	115 °C/W R_θJA on standard PCB enables 1.0 A operation without forced air or heatsink in space-constrained layouts.

Applications

DC-DC Converter Output Rectification

Polarity Protection Circuit

Use Scenario: Used in synchronous or asynchronous buck converter outputs delivering 3.3 V/5 V/12 V to microcontrollers and sensors.

IC Role / Device Role / Timing Role: Freewheeling diode providing low-loss current path during high-side switch off-time.

Use Value: 0.5 V V_F cuts conduction loss by >60% vs. 1N5819, increasing efficiency by 2–3% at 1 A load.

Use Scenario: Placed in series with power input to prevent damage from reversed battery or supply connections.

IC Role / Device Role / Timing Role: Reverse-blocking element that conducts only when polarity is correct.

Use Value: 40 V V_RRM covers 24 V automotive systems with margin; 0.5 mA leakage avoids battery drain in always-connected modules.

Inductive Load Freewheeling

Low-Voltage OR'ing Diode

Use Scenario: Connected across solenoids, relays, or small DC motors to suppress back-EMF spikes.

IC Role / Device Role / Timing Role: Clamping diode that recirculates stored inductor energy during turn-off.

Use Value: 30 A I_FSM withstands short-duration inductive surges without failure; 12 ns t_RR prevents voltage overshoot ringing.

Use Scenario: Employed in dual-power-source systems (e.g., battery + USB) to enable seamless source selection.

IC Role / Device Role / Timing Role: Unidirectional isolation diode allowing current flow from higher-voltage source only.

Use Value: Low V_F minimizes voltage drop between sources, preserving regulation accuracy and reducing heat in compact enclosures.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SS14 (SMA)	Same 40 V V_RRM, 1.0 A I_O, but V_F = 0.5 V @ 1.0 A (identical), IR = 0.5 mA @ 25°C - matches B140Q-13-F electrically.	No AEC-Q101 qualification; not automotive-grade; lacks PPAP capability.	Select SS14 for cost-sensitive commercial designs where automotive reliability is not required.
SB140 (SMB)	Same electrical specs (40 V, 1.0 A, 0.5 V V_F), but SMB package offers higher thermal mass (R_θJA = 65 °C/W with heatsink) and 0.093 g weight vs. SMA's 0.064 g.	SMB footprint requires larger PCB pad layout; better suited for higher ambient temperature or sustained 1 A loads.	Choose SB140 when thermal headroom is constrained and board space permits SMB mounting.

Compared with SS14 and SB140, B140Q-13-F uniquely combines AEC-Q101 qualification, RoHS/halogen-free compliance, and SMA footprint - making it optimal for automotive front-end modules and space-limited industrial controllers requiring certified reliability.

Availability

B140Q-13-F is available at Aetrix Electronics and suitable for automotive infotainment power rails, industrial sensor node DC-DC stages, and medical portable device battery protection circuits requiring stable component supply and long-term lifecycle support.

Supply support for B140Q-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 B140Q-13-F belongs to Diodes' automotive-qualified Schottky rectifier product line, engineered specifically for high-reliability, low-loss power conversion in 12 V/24 V vehicle subsystems and ruggedized industrial equipment.

FAQ

What is the maximum junction temperature rating for B140Q-13-F?

The B140Q-13-F has an operating junction temperature range of –65°C to +150°C. Its thermal design assumes 115°C/W R_θJA on standard FR-4 PCB; derating curves in Figure 10 confirm 1.0 A I_O is sustainable up to +130°C case temperature under specified conditions.

Is B140Q-13-F compatible with lead-free reflow soldering processes?

Yes - B140Q-13-F features matte tin-plated terminals qualified to MIL-STD-202 Method 208 and complies with JEDEC J-STD-020 moisture sensitivity Level 1, supporting standard Pb-free reflow profiles up to 260°C peak temperature without delamination or solderability degradation.

Does B140Q-13-F have a specified reverse recovery time?

Yes - the datasheet specifies t_RR = 12 ns under test conditions of I_F = 0.5 A, I_R = 1 A, and I_RR = 0.25 A with RG1. This ultrafast recovery enables clean switching in high-frequency DC-DC converters without external snubbers.

Can B140Q-13-F be used in place of a 1N5819 in existing designs?

Yes - B140Q-13-F matches 1N5819's 40 V V_RRM and 1.0 A I_O, with identical 0.5 V V_F at 1.0 A and improved 30 A I_FSM (vs. 25 A). Its SMA package is pin-compatible, and AEC-Q101 qualification adds reliability for automotive upgrades.

B140Q-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):: 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 @ 40 V

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

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: SMA

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

B140Q-13-F FAQ

1.How can I place an order for B140Q-13-F through Aetrix?

Please submit a Request for Quotation (RFQ) for B140Q-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 B140Q-13-F reliable?

The price and inventory of B140Q-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 B140Q-13-F is usually 5 days.

3.What payment methods are accepted for B140Q-13-F?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for B140Q-13-F transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for B140Q-13-F?

B140Q-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your B140Q-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 B140Q-13-F?

For technical support, including B140Q-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your B140Q-13-F requirements.

6.How does Aetrix verify that B140Q-13-F is sourced from the original manufacturer or authorized distributors?

All B140Q-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 B140Q-13-F meets industry standards.

7.What is the process for return or replacement of B140Q-13-F?

All B140Q-13-F units undergo pre-shipment inspection (PSI). If there is an issue with B140Q-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 B140Q-13-F part is unused and in its original packaging.

Return procedure for B140Q-13-F:

1.Submit a request within 90 days.

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

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