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Diodes Incorporated B340Q-13-F
- Part No.:
- B340Q-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
B340Q-13-F.pdf
- Description:
- DIODE SCHOTTKY 40V 3A SMC
- Quantity:
- Payment:
- Shipping:
Inventory:7,764
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Product details
Overview
B340Q-13-F from Diodes Incorporated is a 40 V, 3.0 A surface-mount Schottky barrier rectifier in SMC package, featuring 0.5 V forward voltage at 3.0 A and 0.5 mA reverse leakage at rated voltage, designed for automotive polarity protection and freewheeling applications.
For engineers reviewing the B340Q-13-F datasheet, B340Q-13-F pinout, B340Q-13-F application, or B340Q-13-F equivalent, this part supports low-voltage, high-frequency DC/DC conversion, reverse-polarity protection in 12 V/24 V vehicle systems, and energy recirculation in inductive load switching circuits.
Technical Context
This Schottky rectifier uses guard ring die construction to suppress transient-induced failure and enable robust operation under automotive load dump conditions. Its low 0.5 V VF at 3.0 A and 20 °C/W junction-to-terminal thermal resistance support high-efficiency power conversion with minimal conduction loss.
Rated for continuous operation from –55 °C to +150 °C and qualified to AEC-Q101, it meets IATF 16949 manufacturing requirements and supports PPAP documentation. The SMC package provides mechanical stability and thermal performance suitable for automated reflow assembly in automotive ECUs and body control modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - blocks up to 40 V reverse voltage without breakdown, sufficient for 24 V automotive systems with transients |
| IO (AV) | 3.0 A - average forward current rating enabling continuous use in 3 A DC power paths |
| VF max | 0.50 V @ 3.0 A - low conduction loss reduces heat generation and improves system efficiency |
| IR max | 0.5 mA @ 40 V, 25 °C - low leakage preserves battery life in always-on vehicle modules |
| RθJT | 20 °C/W - enables effective heat transfer from junction to PCB pad, supporting compact layout |
| IFSM | 100 A @ 8.3 ms - withstands short-duration surge currents during motor startup or relay switching |
| TJ range | –55 °C to +150 °C - operates reliably across full automotive ambient temperature envelope |
Pinout & Package
Package: SMC (DO-214AB), molded plastic with matte tin-plated terminals, cathode band marking, 0.21 g weight, UL 94V-0 rated, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to positive side of source or inductive load; accepts up to 3.0 A continuous current |
| Cathode | Forward current exit / reverse blocking terminal | Marked with band; connects to ground or return path; blocks 40 V reverse voltage |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Enhances ESD and transient immunity for automotive load-dump survivability (ISO 7637-2 Pulse 5a) |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and HTGB testing |
| Lead-free, halogen-free "Green" packaging | Complies with RoHS 3 (2015/863/EU) and automotive ELV directive; no Br/Cl >900 ppm or Sb >1000 ppm |
| Low thermal resistance (RθJT = 20 °C/W) | Enables direct thermal coupling to copper pour on FR-4, reducing need for oversized heatsinks |
Applications
| Automotive Polarity Protection | DC/DC Converter Freewheeling |
|---|---|
Use Scenario: Reverse-battery connection protection in infotainment head units and ADAS camera modules. IC Role / Device Role / Timing Role: Unidirectional current gate placed between battery input and downstream regulator ICs. Use Value: Prevents catastrophic damage during service misconnection while adding <0.5 V drop at full load. | Use Scenario: Energy recirculation path in synchronous buck converter output stage of LED driver. IC Role / Device Role / Timing Role: Freewheeling diode parallel to low-side MOSFET during off-time. Use Value: Enables fast recovery (<5 ns reverse recovery time implied by Schottky structure) and minimizes switching loss. |
| Engine Control Unit (ECU) Power Input | Body Control Module (BCM) Load Switching |
Use Scenario: Input rectification and transient suppression in 12 V–regulated ECU power supply. IC Role / Device Role / Timing Role: Primary input rectifier after fuse and before LDO or DC/DC controller. Use Value: Handles 100 A surge from alternator load dump while maintaining <0.5 V forward drop at 3 A nominal. | Use Scenario: Back-EMF clamping for solenoid drivers controlling door locks and window motors. IC Role / Device Role / Timing Role: Clamp diode across inductive coil to limit voltage spike during turn-off. Use Value: Limits flyback voltage to ≤40 V, protecting driving FETs without snubber RC network. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SB340-E3/52T (Vishay) | Same 40 V VRRM, 3.0 A IO, but VF = 0.55 V @ 3 A; RθJA = 95 °C/W vs. Diodes' 90 °C/W | Not AEC-Q101 qualified; intended for commercial/industrial use only | Select when automotive qualification is not required and cost is primary driver |
| SS34 (ON Semiconductor) | 40 V VRRM, 3.0 A IO, VF = 0.52 V @ 3 A; IR = 0.5 mA @ 25 °C but 20 mA @ 100 °C (vs. B340Q's 0.5 mA @ 100 °C per Note 7) | Lacks AEC-Q101 certification and IATF 16949 traceability; no PPAP support | Choose for non-automotive consumer power supplies where extended high-temp leakage is acceptable |
Compared with SB340-E3/52T and SS34, B340Q-13-F delivers tighter high-temperature leakage control, automotive-grade process traceability, and lower forward voltage-making it the only option qualified for safety-critical 12 V/24 V vehicle subsystems requiring PPAP documentation.
Availability
B340Q-13-F is available at Aetrix Electronics and suitable for automotive ECU power input, BCM solenoid clamping, and infotainment polarity protection requiring stable component supply across multi-year production cycles.
Supply support for B340Q-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 B320Q–B360Q series belongs to Diodes' automotive-qualified Schottky rectifier product line, engineered specifically for high-reliability reverse-polarity protection, freewheeling, and clamping in 12 V/24 V vehicle electrical systems.
FAQ
Is B340Q-13-F suitable for 24 V truck applications?
Yes. With 40 V VRRM, AEC-Q101 qualification, and –55 °C to +150 °C operating range, B340Q-13-F supports 24 V nominal systems exposed to ISO 16750-2 load dump transients up to 35 V. Its 100 A IFSM rating handles cranking surges, and low VF ensures minimal voltage drop under full 3 A load.
What is the cathode marking method on B340Q-13-F?
The cathode is marked by a distinct band on the body of the SMC package. Per datasheet Figure 1, this band is located adjacent to the cathode terminal; some units may also include a cathode notch on the edge of the molded case, visible in top-view inspection.
Does B340Q-13-F require derating at elevated ambient temperatures?
Yes. Per Figure 6, average forward current must be linearly derated above 75 °C terminal temperature. At 125 °C, IO drops to ~1.8 A. Derating is based on RθJA = 90 °C/W and assumes standard 2 mm × 3 mm copper pad on FR-4; larger pads improve thermal margin.
Can B340Q-13-F replace B340A-13-F in existing designs?
No. B340A-13-F is an obsolete, non-automotive variant with different qualification status, thermal specs, and packaging. B340Q-13-F has stricter AEC-Q101 testing, tighter IR spec at 100 °C (0.5 mA vs. unspecified for B340A), and IATF 16949 manufacturing controls-requiring validation before substitution.
B340Q-13-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-214AB, SMC
- 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:
- SMC
- Operating Temperature - Junction:
- -55°C ~ 150°C
B340Q-13-F FAQ
1.How can I place an order for B340Q-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for B340Q-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 B340Q-13-F reliable?
The price and inventory of B340Q-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 B340Q-13-F is usually 5 days.
3.What payment methods are accepted for B340Q-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for B340Q-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for B340Q-13-F?
B340Q-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your B340Q-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 B340Q-13-F?
For technical support, including B340Q-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your B340Q-13-F requirements.
6.How does Aetrix verify that B340Q-13-F is sourced from the original manufacturer or authorized distributors?
All B340Q-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 B340Q-13-F meets industry standards.
7.What is the process for return or replacement of B340Q-13-F?
All B340Q-13-F units undergo pre-shipment inspection (PSI). If there is an issue with B340Q-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 B340Q-13-F part is unused and in its original packaging.
Return procedure for B340Q-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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