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Diodes Incorporated B240A-13
- Part No.:
- B240A-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
B240A-13.pdf
- Description:
- DIODE SCHOTTKY 40V 2A SMA
- Quantity:
- Payment:
- Shipping:
Inventory:9,120
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Product details
Overview
B240A-13 from Diodes Incorporated is a 40 V, 2.0 A surface-mount Schottky barrier rectifier in SMA package, featuring 0.50 V forward voltage at 2.0 A, 50 A non-repetitive surge rating, and AEC-Q101 qualification for automotive use. It serves as a low-loss freewheeling diode in DC-DC converters and polarity protection element in 12 V automotive power rails.
For engineers reviewing the B240A-13 datasheet, B240A-13 pinout, B240A-13 application, or B240A-13 equivalent, key selection criteria include forward voltage drop at rated current, thermal resistance (25 °C/W junction-to-lead), peak reverse voltage margin, and RoHS-compliant lead-free plating compatibility with automated SMT assembly.
Technical Context
This Schottky rectifier uses guard ring die construction to suppress transient-induced avalanche failure and supports high-frequency switching up to several hundred kHz without significant switching loss penalties. Its low VF and fast recovery (<10 ns) stem from majority-carrier conduction and minimal stored charge.
The device operates across –65 °C to +150 °C with derated average current above 75 °C ambient, and its 25 °C/W RθJL enables direct thermal coupling to PCB copper when mounted per AP02001 pad layout. Surge capability of 50 A (8.3 ms half-sine) is validated under JEDEC JESD22-A112 conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum repetitive reverse voltage before breakdown; sets safe operating limit in 24 V nominal systems with transients. |
| IF(AV) | 2.0 A - Continuous DC forward current at TA = 25 °C; derates linearly to zero at ~125 °C per Fig. 4. |
| VF | 0.50 V @ 2.0 A - Low conduction loss enabling >92% efficiency in 5–12 V buck converter outputs. |
| IFSM | 50 A - Peak non-repetitive surge withstand; accommodates load dump or hot-swap events in automotive ECUs. |
| RθJL | 25 °C/W - Junction-to-lead thermal resistance; allows direct heat transfer to PCB trace or thermal pad without heatsink. |
| IR | 0.5 mA @ 40 V - Reverse leakage at max rated voltage and 25 °C; limits standby power loss in always-on modules. |
| CT | 200 pF @ 40 V - Junction capacitance at full reverse bias; determines high-frequency noise filtering and EMI behavior. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with UL 94V-0 flammability rating, matte tin-plated terminals, cathode indicated by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential node (e.g., switch node in buck converter); must handle full load current and surge. |
| Cathode | Forward current exit / reverse blocking terminal | Connected to output rail or ground return; carries reverse voltage during off-state and defines polarity protection direction. |
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 underhood applications including engine control, body electronics, and ADAS power supplies. |
| Lead-free & halogen-free | Meets RoHS 2 and "Green" definitions (<900 ppm Br/Cl, <1000 ppm Sb); compatible with Pb-free reflow profiles. |
| High-temp solderability | Rated for 260 °C/10 s at terminals-ensures robustness during standard SMT reflow without delamination. |
Applications
| Automotive Body Control Module (BCM) | USB-C Power Delivery Input Protection |
|---|---|
Use Scenario: Reverse polarity protection on 12 V supply input to BCM microcontroller and CAN transceiver circuitry. IC Role / Device Role / Timing Role: Unidirectional current gate preventing damage from battery misconnection. Use Value: 0.50 V forward drop minimizes voltage loss across protection path while sustaining 2.0 A continuous load. | Use Scenario: Input rectification and overvoltage clamping in USB-C PD sink front-end with 20 V max input. IC Role / Device Role / Timing Role: Freewheeling path for synchronous rectifier controller during dead-time intervals. Use Value: 40 V VRRM provides 2× margin over 20 V PD specification; 200 pF capacitance avoids signal integrity degradation on CC lines. |
| Industrial 24 V DC-DC Converter Output Stage | LED Driver Polarity Guard |
Use Scenario: Secondary-side rectification in isolated flyback or forward converter powering PLC I/O modules. IC Role / Device Role / Timing Role: High-frequency synchronous rectifier replacement with no gate drive complexity. Use Value: 50 A surge rating absorbs transformer leakage energy spikes; 25 °C/W RθJL enables compact thermal design on 2 oz copper. | Use Scenario: Reverse-voltage blocking for constant-current LED drivers powered from unregulated 12–24 V sources. IC Role / Device Role / Timing Role: Polarity safeguard ensuring LEDs remain off during incorrect wiring. Use Value: 0.5 mA leakage at 40 V ensures negligible dark-current drain in battery-powered signage applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SB240-E3/52 | Same 40 V/2 A rating, but SMB package (RθJL = 20 °C/W), higher VF (0.52 V typ) | Higher thermal performance but larger footprint; less suitable for space-constrained SMA layouts | Select when board-level thermal dissipation dominates over area constraints |
| SS24 | 40 V/2 A, SMA package, VF = 0.55 V @ 2 A, no AEC-Q101 qualification | Lacks automotive qualification and guard ring; not recommended for underhood use | Select only for cost-sensitive industrial or consumer applications without automotive reliability requirements |
Compared with SB240-E3/52 and SS24, B240A-13 uniquely combines AEC-Q101 qualification, SMA footprint, and lowest VF (0.50 V) among qualified 2 A Schottkys-making it optimal for space-limited, thermally constrained automotive modules requiring maximum efficiency.
Availability
B240A-13 is available at Aetrix Electronics and suitable for automotive body electronics, industrial DC-DC converters, and USB-C power delivery systems requiring stable component supply and AEC-Q101 compliance.
Supply support for B240A-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, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.
The B2xxA series belongs to Diodes' automotive-qualified Schottky rectifier product line, engineered specifically for high-reliability 12 V/24 V power rail protection and conversion in harsh-temperature vehicle environments.
FAQ
What is the maximum junction temperature for continuous operation?
The B240A-13 has an operating junction temperature range of –65 °C to +150 °C. For continuous DC operation at 2.0 A, the maximum allowable ambient temperature is approximately 75 °C when mounted on a standard FR-4 PCB with minimum recommended pad layout (AP02001), based on its 25 °C/W junction-to-lead thermal resistance and power dissipation of 1.0 W.
Is B240A-13 suitable for synchronous rectification?
No-B240A-13 is a passive Schottky rectifier, not a synchronous rectifier IC. It lacks gate control, driver circuitry, or MOSFET structure. However, its low VF and fast recovery make it a common replacement for active synchronous rectifiers in cost- or simplicity-sensitive designs where control complexity must be avoided.
How does the guard ring construction improve reliability?
The guard ring die structure surrounds the active junction with a doped region that controls electric field distribution at the silicon edge. This prevents premature avalanche breakdown during voltage transients (e.g., load dump), reducing failure risk in automotive applications where repetitive 100 V+ spikes occur. It is verified per AEC-Q101 stress test conditions.
Can B240A-13 replace B240-13 in existing designs?
Yes-B240A-13 and B240-13 share identical electrical specifications and SMA package dimensions, but B240A-13 adds AEC-Q101 qualification and automotive-grade traceability. No layout or schematic changes are needed; the "A" suffix denotes enhanced reliability screening, making it a drop-in upgrade for automotive or high-reliability industrial use.
B240A-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-214AC, SMA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 V
- Current - Average Rectified (Io):
- 2A
- Voltage - Forward (Vf) (Max) @ If:
- 500 mV @ 2 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMA
- Operating Temperature - Junction:
- -65°C ~ 150°C
B240A-13 FAQ
1.How can I place an order for B240A-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for B240A-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 B240A-13 reliable?
The price and inventory of B240A-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for B240A-13 is usually 5 days.
3.What payment methods are accepted for B240A-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for B240A-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for B240A-13?
B240A-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your B240A-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 B240A-13?
For technical support, including B240A-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your B240A-13 requirements.
6.How does Aetrix verify that B240A-13 is sourced from the original manufacturer or authorized distributors?
All B240A-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 B240A-13 meets industry standards.
7.What is the process for return or replacement of B240A-13?
All B240A-13 units undergo pre-shipment inspection (PSI). If there is an issue with B240A-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 B240A-13 part is unused and in its original packaging.
Return procedure for B240A-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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