My Inquiry
My Account
Diodes Incorporated B350AQ-13-F
- Part No.:
- B350AQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
B350AQ-13-F.pdf
- Description:
- DIODE SCHOTTKY 50V 3A SMA
- Quantity:
- Payment:
- Shipping:
Inventory:4,990
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
B350AQ-13-F from Diodes Incorporated is a 50 V, 3.0 A surface-mount Schottky barrier rectifier in SMA package, featuring 0.70 V max forward voltage at 3 A, 0.5 mA max reverse leakage at rated VR, and AEC-Q101 qualification for automotive use in DC-DC converters and polarity protection circuits.
For engineers reviewing the B350AQ-13-F datasheet, B350AQ-13-F pinout, B350AQ-13-F application, or B350AQ-13-F equivalent, key selection criteria include its 50 V reverse blocking rating, low VF for high-efficiency power conversion, thermal resistance of 100 °C/W (junction-to-ambient on glass epoxy), RoHS-compliant lead-free plating, and cathode-band polarity marking.
Technical Context
This Schottky rectifier uses guard ring die construction to suppress transient-induced avalanche breakdown and supports automated SMT assembly with matte-tin terminal plating compliant with MIL-STD-202. Its 150 pF typical junction capacitance at 4 V and 1 MHz enables stable operation in high-frequency switching topologies.
Rated for continuous operation from –55 °C to +150 °C, it delivers 80 A non-repetitive surge current capability and maintains ≤0.5 mA IR up to 100 °C ambient-critical for under-hood automotive power rails where thermal derating must be precisely modeled.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - maximum repetitive reverse voltage before breakdown; sets upper limit for DC-DC converter output stage or input clamp design. |
| IO | 3.0 A - average rectified forward current at TA = +25°C; defines steady-state conduction capacity in freewheeling paths. |
| VF (max) | 0.70 V @ 3 A - forward voltage drop determining conduction loss and thermal load in high-duty-cycle applications. |
| IR (max) | 0.5 mA @ 50 V - reverse leakage current at rated VR and 25°C; impacts standby power in battery-backed systems. |
| RθJA | 100 °C/W - junction-to-ambient thermal resistance on glass epoxy substrate; used to calculate temperature rise under real PCB layout conditions. |
| IFSM | 80 A - non-repetitive peak forward surge current (8.3 ms half-sine); validates robustness against inrush or fault transients. |
| CT | 150 pF @ 4 V, 1 MHz - junction capacitance affecting high-frequency switching noise and EMI filter design. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic body with UL 94V-0 flammability rating, cathode band polarity marking, and matte-tin lead-free plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., switch node in buck converter) to enable unidirectional conduction. |
| Cathode | Forward current exit point | Marked with band; ties to higher-potential rail (e.g., output capacitor positive) to block reverse current flow. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Suppresses edge breakdown during voltage transients, improving reliability in noisy automotive environments. |
| AEC-Q101 qualification | Validated for automotive-grade stress testing including temperature cycling, HTRB, and ESD-enabling use without additional qualification. |
| Lead-free, halogen-free "Green" packaging | Meets RoHS 3 (2015/863/EU) and IATF 16949 manufacturing requirements for eco-compliant production. |
| Low thermal resistance (RθJT = 25 °C/W) | Enables efficient heat transfer from junction to PCB pad, supporting compact layout in space-constrained modules. |
Applications
| Automotive DC-DC Converters | Polarity Protection Circuits |
|---|---|
|
Use Scenario: Step-down conversion from 12 V battery to 5 V/3.3 V for infotainment and ADAS ECUs. IC Role / Device Role / Timing Role: Freewheeling diode in synchronous buck converter secondary path. Use Value: 0.70 V VF minimizes conduction loss at 3 A load, reducing thermal stress and enabling smaller heatsinks. |
Use Scenario: Reverse-voltage protection on USB-C power inputs in telematics gateways. IC Role / Device Role / Timing Role: Series-blocking rectifier preventing damage from miswired external power sources. Use Value: 50 V VRRM exceeds automotive load-dump transients (ISO 7637-2 Pulse 5a), ensuring fail-safe operation. |
| High-Frequency Inverters | Industrial SMPS Auxiliary Supplies |
|
Use Scenario: Output rectification in 100–500 kHz resonant inverters for LED drivers and HVAC blowers. IC Role / Device Role / Timing Role: High-speed unidirectional current path with minimal recovery time. Use Value: 150 pF CT limits capacitive switching loss and RF noise generation at elevated frequencies. |
Use Scenario: Standby power supply rectification in PLC backplane controllers requiring long-term reliability. IC Role / Device Role / Timing Role: Primary output rectifier delivering 3 A at 12 V with low IR drift over temperature. Use Value: ≤0.5 mA IR at 100 °C ensures <1 mW standby dissipation, meeting Energy Star Level VI efficiency targets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SB350-E3/54 (Vishay) | Same 50 V VRRM and 3 A IO, but VF = 0.75 V (max @ 3 A); RθJA = 110 °C/W on FR-4. | Slightly higher conduction loss and thermal resistance; less suitable for thermally constrained automotive modules. | Select when cost sensitivity outweighs 50 mV VF advantage and board-level thermal management is robust. |
| SS35 (ON Semiconductor) | 50 V VRRM, 3 A IO, VF = 0.72 V (max @ 3 A); not AEC-Q101 qualified; RθJA = 105 °C/W. | Lacks automotive qualification and fails PPAP documentation requirements for Tier 1 OEM designs. | Acceptable for industrial or consumer SMPS where automotive compliance is not mandated. |
Compared with SB350-E3/54 and SS35, B350AQ-13-F delivers lower VF, superior thermal performance on glass epoxy, and full AEC-Q101 certification-making it the preferred choice for automotive power conversion where efficiency, thermal margin, and qualification traceability are jointly critical.
Availability
B350AQ-13-F is available at Aetrix Electronics and suitable for automotive DC-DC converters, industrial SMPS auxiliary supplies, and polarity protection circuits requiring stable component supply across extended product lifecycles.
Supply support for B350AQ-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 and signal integrity solutions for automotive, industrial, and computing markets.
The B350AQ-13-F belongs to Diodes' AEC-Q101-qualified Schottky rectifier family, engineered specifically for high-efficiency, high-temperature automotive power conversion and reverse-polarity protection in harsh environments.
FAQ
What is the maximum operating temperature for B350AQ-13-F?
The B350AQ-13-F has a specified operating junction temperature range of –55 °C to +150 °C. Its thermal resistance values (RθJA = 100 °C/W on glass epoxy, RθJT = 25 °C/W) allow accurate junction temperature calculation under real-world PCB layouts and ambient conditions.
Is B350AQ-13-F compatible with lead-free reflow soldering processes?
Yes-B350AQ-13-F features matte-tin lead-free plating and is rated for moisture sensitivity level 1 per J-STD-020. It withstands standard Pb-free reflow profiles (peak temperature up to 260 °C) without degradation, and solderability is verified per MIL-STD-202, Method 208.
Does B350AQ-13-F require a heatsink in typical applications?
No dedicated heatsink is required for B350AQ-13-F at 3 A continuous current if mounted on a glass epoxy PCB with the recommended 2 mm × 3 mm copper pad. Its RθJA of 100 °C/W yields ~30 °C junction-to-ambient rise at 3 A (assuming 0.70 V VF), staying well within the 150 °C TJ limit at ≤120 °C ambient.
How is polarity identified on the B350AQ-13-F package?
Polarity is marked by a visible cathode band on the SMA package body. The band denotes the cathode terminal; the opposite end is the anode. This marking aligns with industry-standard DO-214AC orientation and is confirmed in Diodes' mechanical drawings and marking information (DS39191 Rev. 4-2, page 5).
B350AQ-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):
- 50 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 700 mV @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 50 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
B350AQ-13-F FAQ
1.How can I place an order for B350AQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for B350AQ-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 B350AQ-13-F reliable?
The price and inventory of B350AQ-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 B350AQ-13-F is usually 5 days.
3.What payment methods are accepted for B350AQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for B350AQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for B350AQ-13-F?
B350AQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your B350AQ-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 B350AQ-13-F?
For technical support, including B350AQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your B350AQ-13-F requirements.
6.How does Aetrix verify that B350AQ-13-F is sourced from the original manufacturer or authorized distributors?
All B350AQ-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 B350AQ-13-F meets industry standards.
7.What is the process for return or replacement of B350AQ-13-F?
All B350AQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with B350AQ-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 B350AQ-13-F part is unused and in its original packaging.
Return procedure for B350AQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
B350AQ-13-F Tags
-
1N4448X-TP
Micro Commercial Co
-
1N4148WX-TP
Micro Commercial Co
-
1N4148TR
onsemi
-
MMSD4148T1G
onsemi
-
MMBD914LT3G
onsemi
-
BAS16HT1G
onsemi
-
1N914BWT
onsemi
-
BAS21LT1G
onsemi
-
LL4148
onsemi
-
BAS16LT1G
onsemi
-
MMSD914T1G
onsemi
-
BAV21W-7-F
Diodes Incorporated
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
