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Diodes Incorporated B350BQ-13-F
- Part No.:
- B350BQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
B350BQ-13-F.pdf
- Description:
- DIODE SCHOTTKY 50V 3A SMB TR 3K
- Quantity:
- Payment:
- Shipping:
Inventory:8,762
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Product details
Overview
B350BQ-13-F from Diodes Incorporated is a 50 V, 3.0 A surface-mount Schottky barrier rectifier in SMB package, featuring 0.7 V max forward voltage at 3.0 A and 0.5 mA max reverse leakage at rated VR, designed for polarity protection, freewheeling, and low-voltage DC/DC converter output rectification in commercial and automotive power supplies.
For engineers reviewing the B350BQ-13-F datasheet, B350BQ-13-F pinout, B350BQ-13-F application, or B350BQ-13-F equivalent, key selection criteria include peak repetitive reverse voltage (50 V), average forward current (3.0 A), thermal resistance (95 °C/W junction-to-ambient), surge rating (100 A non-repetitive), and AEC-Q101 qualification for automotive use.
Technical Context
This Schottky rectifier uses guard ring die construction to enhance transient robustness and suppress avalanche-induced failure during inductive switching events. Its low VF (0.7 V @ 3.0 A) and low IR (0.5 mA @ 50 V) enable high-efficiency operation in 5–24 V input power stages.
Thermal performance is defined by RθJA = 95 °C/W on standard FR-4 (0.4" × 0.5", 2 oz Cu), with full-rated IO achievable only up to TJ = +100°C - requiring derating above that case temperature per Figure 6.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - Maximum repetitive reverse blocking voltage; sets upper limit for DC bus or flyback clamp voltage |
| IO (AV) | 3.0 A - Continuous average forward current at TT = +100°C; defines steady-state power delivery capability |
| VF (max) | 0.70 V @ 3.0 A - Forward drop determines conduction loss (2.1 W max at full load) and thermal rise |
| IR (max) | 0.5 mA @ 50 V, +25°C - Low leakage preserves efficiency in standby and high-impedance bias networks |
| IFSM | 100 A @ 8.3 ms - Withstands single half-sine surge; supports motor startup or capacitor-charging transients |
| RθJA | 95 °C/W - Junction-to-ambient thermal resistance on standard PCB; guides heatsinking and layout decisions |
| AEC-Q101 | Qualified - Meets stress test requirements for automotive electronics; enables use in engine control, body modules |
Pinout & Package
Package: SMB (Surface Mount Body), molded plastic, UL 94V-0 rated, cathode band marked on top surface. Weight: 0.093 g. Moisture sensitivity level: J-STD-020 Level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., ground or return path) in rectifier configuration |
| Cathode | Forward current exit / reverse-blocking terminal | Marked with band; connects to positive rail in polarity protection or output of switching stage |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Improves ESD and surge immunity without external TVS; reduces risk of catastrophic failure during load dump |
| Low VF (0.7 V @ 3 A) | Minimizes conduction loss in 12 V systems - ~1.5× lower loss than comparable Si diodes |
| AEC-Q101 qualification | Validated for automotive underhood environments: -40°C to +125°C operation with PPAP support |
| Lead-free, halogen-free "Green" construction | Meets RoHS 3 (2015/863/EU) and automotive ELV directive; no Br/Cl >900 ppm, Sb <1000 ppm |
| SMB package with 0.2" × 0.25" pad | Enables automated reflow assembly; compatible with IPC-7351B footprint and standard pick-and-place tooling |
Applications
| Automotive Body Control Module | Industrial DC/DC Converter Output |
|---|---|
Use Scenario: Reverse-polarity protection on 12 V supply input to BCM microcontroller and CAN transceiver rails. IC Role / Device Role / Timing Role: Unidirectional current gate preventing damage from battery misconnection. Use Value: 0.7 V VF limits voltage drop to <1% of 12 V rail; 50 V VRRM exceeds ISO 7637-2 pulse 5a (120 V) margin. | Use Scenario: Freewheeling path for synchronous buck converter operating at 200 kHz, 5 V/3 A output. IC Role / Device Role / Timing Role: Provides low-loss recirculation path during high-side FET off-time. Use Value: 3.0 A IO and 100 A IFSM handle peak inductor current ripple and startup surges without derating. |
| Consumer USB-C Power Delivery Adapter | Telecom PoE Midspan Rectification |
Use Scenario: Secondary-side output rectification in 20 W GaN-based adapter (5 V/3 A or 9 V/2.2 A). IC Role / Device Role / Timing Role: Converts high-frequency transformer output to regulated DC; operates at 100–300 kHz. Use Value: Low CT (200 pF @ 4 V) minimizes switching loss and EMI; SMB footprint fits compact secondary-side layout. | Use Scenario: 48 V DC input rectification before DC/DC conversion in IEEE 802.3at PoE midspan injector. IC Role / Device Role / Timing Role: Blocks reverse current from auxiliary supplies while passing primary 48 V feed. Use Value: 50 V VRRM provides 2× safety margin over nominal 48 V; 0.5 mA IR ensures minimal standby drain. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SS35-E3/57T (Vishay) | Same SMB package, 50 V VRRM, but VF = 0.52 V @ 3 A (lower), IR = 0.2 mA @ 50 V (lower) | Higher efficiency in low-VF-critical designs; not AEC-Q101 qualified | Select when automotive qualification is unnecessary and <0.55 V VF is required |
| SB350-E3/57T (Vishay) | Same SMB package, 50 V VRRM, VF = 0.7 V @ 3 A, IR = 0.5 mA @ 50 V, but no AEC-Q101 or PPAP support | Identical electrical specs; lacks automotive change control and IATF 16949 traceability | Select for cost-sensitive commercial designs where automotive compliance is not mandated |
Compared with SS35-E3/57T and SB350-E3/57T, B350BQ-13-F trades marginal VF increase for guaranteed AEC-Q101 qualification, PPAP documentation, and IATF 16949 manufacturing - critical for Tier 1 automotive sourcing but less essential in consumer power adapters.
Availability
B350BQ-13-F is available at Aetrix Electronics and suitable for automotive body control modules, industrial DC/DC converters, USB-C power adapters, and PoE midspan injectors requiring stable component supply, long-term lifecycle assurance, and automotive-grade traceability.
Supply support for B350BQ-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, serving automotive, industrial, computing, and consumer markets with a focus on high-reliability, standards-compliant components.
The B340BQ–B360BQ series belongs to Diodes' general-purpose Schottky rectifier product line, engineered for cost-effective, high-efficiency power conversion in commercial and automotive applications where low VF, surge robustness, and regulatory compliance are prioritized.
FAQ
Is B350BQ-13-F suitable for automotive under-hood applications?
Yes. It is AEC-Q101 qualified, manufactured in IATF 16949 certified facilities, and rated for TJ = –55°C to +150°C. Its guard ring die construction and 100 A surge rating meet requirements for engine bay power distribution and body control modules.
What is the maximum continuous forward current at 85°C ambient?
At TA = +85°C, derating begins per Figure 6. With RθJA = 95 °C/W, the junction temperature rise at 3.0 A is 285°C - exceeding rating. For safe operation at 85°C ambient, IO must be reduced to ≤1.6 A to maintain TJ ≤ +100°C.
Does B350BQ-13-F have a specified total capacitance value?
Yes. CT = 200 pF typical at VR = 4 V, f = 1 MHz (per Electrical Characteristics table). This low capacitance supports high-frequency switching (>200 kHz) with minimal capacitive loss and EMI generation in SMPS outputs.
Can B350BQ-13-F replace B340BQ-13-F in existing designs?
Yes, with design review. B350BQ has higher VRRM (50 V vs. 40 V) and slightly higher VF (0.7 V vs. 0.5 V), making it suitable for 50 V systems but potentially increasing conduction loss in 40 V-limited circuits. Thermal and layout compatibility is identical (same SMB package).
B350BQ-13-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-214AA, SMB
- 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:
- SMB
- Operating Temperature - Junction:
- -55°C ~ 150°C
B350BQ-13-F FAQ
1.How can I place an order for B350BQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for B350BQ-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 B350BQ-13-F reliable?
The price and inventory of B350BQ-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 B350BQ-13-F is usually 5 days.
3.What payment methods are accepted for B350BQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for B350BQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for B350BQ-13-F?
B350BQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your B350BQ-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 B350BQ-13-F?
For technical support, including B350BQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your B350BQ-13-F requirements.
6.How does Aetrix verify that B350BQ-13-F is sourced from the original manufacturer or authorized distributors?
All B350BQ-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 B350BQ-13-F meets industry standards.
7.What is the process for return or replacement of B350BQ-13-F?
All B350BQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with B350BQ-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 B350BQ-13-F part is unused and in its original packaging.
Return procedure for B350BQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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