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Diodes Incorporated B340AQ-13-F
- Part No.:
- B340AQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
B340AQ-13-F.pdf
- Description:
- DIODE SCHOTTKY 40V 3A SMA TR 5K
- Quantity:
- Payment:
- Shipping:
Inventory:5,057
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Product details
Overview
B340AQ-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, 0.5 mA max reverse leakage at rated VRRM, and AEC-Q101 qualification for automotive use. It serves as a low-loss freewheeling or polarity protection diode in DC-DC converters and high-frequency inverters.
For engineers reviewing the B340AQ-13-F datasheet, B340AQ-13-F pinout, B340AQ-13-F application, or B340AQ-13-F equivalent, key selection criteria include its 40 V reverse blocking rating, thermal resistance (RθJA = 140 °C/W on FR-4), cathode-band polarity marking, RoHS-compliant matte-tin plating, and IATF 16949 manufacturing traceability.
Technical Context
This Schottky rectifier uses guard ring die construction to suppress transient-induced avalanche failure and supports automated SMT assembly with lead-free, halogen-free "Green" molding compound (UL 94V-0). Its low forward voltage enables high efficiency in 12 V–24 V input DC-DC stages where conduction loss dominates thermal design.
Rated for continuous operation from –55 °C to +150 °C junction temperature, it delivers 80 A non-repetitive surge current capability (8.3 ms half-sine) and exhibits 200 pF typical junction capacitance at 4 V reverse bias - critical for minimizing switching node ringing in synchronous buck topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum repetitive reverse voltage before breakdown; sets upper limit for DC bus or output rail protection applications. |
| IO | 3.0 A - Average rectified forward current at +25 °C ambient; derates to ~1.8 A at +100 °C per Fig. 6. |
| VF (max) | 0.50 V @ 3 A - Low conduction loss reduces power dissipation to ≤1.5 W under full load, easing thermal management. |
| IR (max) | 0.5 mA @ 40 V - Low leakage preserves battery life in always-on polarity protection circuits. |
| CT (typ) | 200 pF @ 4 V - Limits high-frequency displacement current during fast switching transitions. |
| RθJA | 140 °C/W - Requires ≥100 mm² copper pad on FR-4 to maintain TJ < 125 °C at 3 A continuous. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic body with cathode band marking; dimensions: 4.60 mm × 2.92 mm × 1.63 mm (L × W × H); weight ≈ 0.064 g; moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., switch node in buck converter or ground return in reverse polarity protection). |
| Cathode | Forward current exit / reverse blocking terminal | Marked by band; ties to higher-potential rail (e.g., input VIN or output VOUT); blocks reverse current flow above 40 V. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Suppresses edge avalanche during voltage transients, improving reliability in noisy automotive environments. |
| AEC-Q101 qualification | Validated for automotive-grade stress testing (HTOL, TC, ESD, etc.), enabling use in engine control, ADAS, and infotainment power rails. |
| Lead-free, halogen-free "Green" packaging | Meets RoHS 3 (2015/863/EU) and IATF 16949 process controls; eliminates bromine <900 ppm, chlorine <900 ppm, antimony <1000 ppm. |
| Low thermal resistance junction-to-terminal | RθJT = 25 °C/W - Enables efficient heat transfer to PCB copper when mounted with recommended 2 mm × 3 mm pad. |
Applications
| Automotive DC-DC Converters | USB-C Power Delivery Polarity Protection |
|---|---|
Use Scenario: Step-down conversion from 12 V or 48 V battery to 5 V/9 V/15 V rails for infotainment and telematics modules. IC Role / Device Role / Timing Role: Freewheeling diode in asynchronous buck converter; conducts during high-side FET off-time. Use Value: 0.50 V VF minimizes conduction loss versus silicon diodes, improving efficiency by ≥3% at 3 A load. |
Use Scenario: Preventing damage from reversed USB-C cable insertion in portable electronics docking stations. IC Role / Device Role / Timing Role: Reverse polarity protection element placed between connector and downstream PMIC. Use Value: 0.5 mA IR at 20 V ensures negligible standby current drain while blocking up to 40 V reverse faults. |
| Industrial SMPS Output Rectification | High-Frequency Inverter Freewheeling |
Use Scenario: Secondary-side rectification in 100–500 kHz isolated flyback or forward converters for PLC I/O modules. IC Role / Device Role / Timing Role: Output rectifier conducting unidirectional current from transformer secondary winding. Use Value: 200 pF CT limits capacitive coupling noise into feedback loop, preserving regulation stability. |
Use Scenario: Snubberless freewheeling path in 20–100 kHz motor drive half-bridges for HVAC blowers and pumps. IC Role / Device Role / Timing Role: Provides low-loss current recirculation path when PWM switches turn off. Use Value: 80 A IFSM withstands inductive kick energy without degradation, eliminating need for external snubbers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SS34 (Vishay) | Same 40 V VRRM, 3 A IO, but VF = 0.55 V (max @ 3 A); RθJA = 170 °C/W; no AEC-Q101 certification. | Lacks automotive qualification and has higher thermal resistance - unsuitable for under-hood deployment or space-constrained layouts. | Select only for cost-sensitive industrial or consumer applications where AEC-Q101 and thermal margin are not required. |
| MBR340 (ON Semiconductor) | Identical 40 V/3 A rating and 0.50 V VF, but packaged in DO-214AA (SMB); RθJA = 120 °C/W; AEC-Q101 qualified. | SMB package offers better thermal performance but occupies 30% more board area than SMA; requires different footprint and stencil. | Choose when thermal headroom is critical and PCB layout allows larger footprint; verify solder paste volume compatibility. |
Compared with SS34 and MBR340, B340AQ-13-F uniquely combines AEC-Q101 compliance, SMA's compact size, and 140 °C/W thermal resistance - making it optimal for automotive front-end DC-DC modules where space, reliability, and thermal constraints intersect.
Availability
B340AQ-13-F is available at Aetrix Electronics and suitable for automotive power conversion, USB-C protection, industrial SMPS, and high-frequency inverter designs requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for B340AQ-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, signal integrity, and protection solutions for automotive, industrial, and computing markets.
The B320AQ–B360AQ series was designed specifically for AEC-Q101-compliant automotive power systems demanding low VF, robust surge immunity, and green packaging - targeting DC-DC converters, battery management, and ECU power rails.
FAQ
What is the maximum junction temperature for continuous operation?
The B340AQ-13-F supports continuous operation up to +150 °C junction temperature, verified per AEC-Q101 stress testing. At ambient temperatures above +85 °C, derating per Fig. 6 applies: average forward current drops linearly to ~1.8 A at +100 °C ambient on standard FR-4 PCB.
Is this diode suitable for synchronous rectification?
No - the B340AQ-13-F is a passive Schottky rectifier, not a synchronous rectifier controller or MOSFET-based solution. It functions as a freewheeling or output rectifier in asynchronous topologies; synchronous designs require active gate-driven MOSFETs and dedicated drivers.
Does the cathode band indicate pin 1 or polarity orientation?
The cathode band marks the cathode terminal - the end that connects to the higher-potential node in forward conduction. Unlike ICs, SMA-packaged diodes have no "pin 1"; polarity is defined solely by the band, which must align toward the positive rail in circuit layout.
Can this part replace B340A without changes?
Yes - B340AQ-13-F is the RoHS-compliant, halogen-free, AEC-Q101-qualified version of B340A. Electrical specs, package dimensions, and thermal characteristics are identical; only material content and qualification status differ. No layout or schematic changes are needed.
B340AQ-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):
- 14 ns
- 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
B340AQ-13-F FAQ
1.How can I place an order for B340AQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for B340AQ-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 B340AQ-13-F reliable?
The price and inventory of B340AQ-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 B340AQ-13-F is usually 5 days.
3.What payment methods are accepted for B340AQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for B340AQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for B340AQ-13-F?
B340AQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your B340AQ-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 B340AQ-13-F?
For technical support, including B340AQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your B340AQ-13-F requirements.
6.How does Aetrix verify that B340AQ-13-F is sourced from the original manufacturer or authorized distributors?
All B340AQ-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 B340AQ-13-F meets industry standards.
7.What is the process for return or replacement of B340AQ-13-F?
All B340AQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with B340AQ-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 B340AQ-13-F part is unused and in its original packaging.
Return procedure for B340AQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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