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Diodes Incorporated B270-13-F
- Part No.:
- B270-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
B270-13-F.pdf
- Description:
- DIODE SCHOTTKY 70V 2A SMB
- Quantity:
- Payment:
- Shipping:
Inventory:6,569
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Product details
Overview
B270-13-F from Diodes Incorporated is a 2.0A, 70V peak repetitive reverse voltage Schottky barrier rectifier in SMB package, featuring low forward voltage drop (0.79 V @ 2.0A, 25°C), 50A non-repetitive surge rating, and guard ring die construction for transient protection. It is used in low-voltage, high-frequency inverters, freewheeling paths, and polarity protection circuits in DC-DC converters and industrial power supplies.
For engineers reviewing the B270-13-F datasheet, B270-13-F pinout, B270-13-F application, or B270-13-F equivalent, key selection criteria include forward voltage at rated current, thermal resistance (15°C/W junction-to-terminal), reverse leakage (7.0 µA @ 70V, 25°C), surge capability (50A half-sine), and SMB package compatibility with automated SMT assembly.
Technical Context
This Schottky rectifier uses a planar guard ring die structure to enhance transient voltage immunity without compromising forward conduction efficiency. Its low VF and fast recovery (inherently <10 ns) enable high-efficiency operation in switching frequencies up to several hundred kHz.
The device operates across –65°C to +150°C with a thermal resistance of 15°C/W (junction-to-terminal), and its capacitance is 75 pF at 4V reverse bias - optimized for minimizing switching losses in buck converter freewheeling and OR-ing applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 70 V - Maximum peak repetitive reverse voltage; defines safe blocking range in 48V and lower DC bus systems. |
| IO | 2.0 A @ TT = +125°C - Continuous average forward current rating under thermal-limited conditions on PCB. |
| VF | 0.79 V @ 2.0A, 25°C - Low conduction loss enabling >92% efficiency in 5–12V output DC-DC stages. |
| IFSM | 50 A (8.3 ms half-sine) - Withstands inrush and fault currents in power supply startup and short-circuit events. |
| RθJT | 15 °C/W - Enables direct thermal path to PCB copper; supports 2.0A operation without heatsink on 2oz FR-4 with ≥1 cm² pad area. |
| IR | 7.0 µA @ 70V, 25°C - Low leakage preserves battery life in always-on backup rails and low-power hold-up circuits. |
Pinout & Package
Package: SMB (Surface Mount Small Outline), molded plastic, UL 94V-0 rated, cathode indicated by band or notch. Terminals are matte tin-plated, lead-free, and solderable per MIL-STD-202, Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., switch node in buck converter); requires low-inductance layout for EMI control. |
| Cathode | Forward current exit / reverse blocking terminal | Connected to output rail or ground return; cathode band identifies polarity during automated placement and visual inspection. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Improves ruggedness against voltage transients (e.g., load dump, inductive kickback) without adding series resistance. |
| Low VF at high current | 0.79 V @ 2.0A enables <1.6 W conduction loss at full load - critical for thermally constrained space-constrained modules. |
| High-temperature solderability | Rated for 260°C/10 sec reflow - compatible with standard lead-free PCB assembly processes without degradation. |
| Halogen & antimony free | Meets "Green" definition (<900 ppm Br, <900 ppm Cl, <1000 ppm Sb); supports environmental compliance in automotive and industrial end equipment. |
Applications
| DC-DC Buck Converter Freewheeling | USB-C Power Delivery Polarity Protection |
|---|---|
Use Scenario: Placed as low-side freewheeling diode in synchronous or non-synchronous buck regulators delivering 3.3V–12V at up to 2A. IC Role / Device Role / Timing Role: Provides unidirectional current path during high-side switch off-time; conducts continuously at switching frequency. Use Value: 0.79 V VF minimizes power loss and thermal rise; 50A IFSM handles startup surges without failure. | Use Scenario: Used in USB-C receptacle circuits to prevent reverse polarity connection damage to downstream PMICs or SoCs. IC Role / Device Role / Timing Role: Acts as passive OR-ing diode; blocks reverse current while allowing forward power delivery from either VBUS source. Use Value: Low IR (7.0 µA) prevents standby drain; SMB footprint fits tight board areas near connector edge. |
| Industrial 24V AC/DC Adapter Output Rectification | LED Driver Flyback Secondary Side |
Use Scenario: Output rectifier in compact 24V, 2A offline flyback adapters powering PLC I/O modules. IC Role / Device Role / Timing Role: Converts transformer secondary AC to regulated DC; operates at 50–100 kHz with minimal switching loss. Use Value: 75 pF CT reduces high-frequency ringing; 15°C/W RθJT allows stable operation without heatsink at full load. | Use Scenario: Secondary-side rectifier in isolated LED drivers for streetlight or commercial lighting (36–48V output). IC Role / Device Role / Timing Role: Delivers constant current to LED string; must withstand repeated 50A surge events during cold-start. Use Value: Guard ring die ensures reliability under lightning-induced transients on long LED cable runs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SS27-E3/5AT (Vishay) | Same SMB package, 70V VRRM, but VF = 0.82 V @ 2A; higher IR (10 µA @ 70V). | Slightly higher conduction loss; less suitable for thermally constrained 2A continuous use. | Prefer B270-13-F where VF and leakage are critical; SS27-E3/5AT acceptable if cost sensitivity outweighs 30 mV VF penalty. |
| MBR270F (ON Semiconductor) | Identical electrical specs (70V, 2A, 0.79 V VF), but SMB package has different leadframe geometry affecting thermal spread. | Same functional role; minor layout revision may be needed due to terminal width variation (2.08 mm vs. 2.09 mm). | Drop-in replacement electrically; verify solder joint reliability with MBR270F's plating profile in high-volume reflow. |
Compared with SS27-E3/5AT and MBR270F, B270-13-F offers the lowest combination of VF and IR in SMB format, with verified guard ring robustness - making it preferred for industrial power supplies requiring long-term surge resilience and low standby loss.
Availability
B270-13-F is available at Aetrix Electronics and suitable for DC-DC converters, USB-C power delivery systems, industrial AC/DC adapters, and LED driver designs requiring stable component supply, RoHS/Green compliance, and consistent SMB package sourcing.
Supply support for B270-13-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.
B270-13-F belongs to Diodes' high-reliability Schottky rectifier product line, engineered for efficiency-critical power conversion in industrial, computing, and consumer power supplies where low VF, surge tolerance, and thermal performance are prioritized.
FAQ
Is B270-13-F suitable for automotive applications?
No - B270-13-F is not AEC-Q101 qualified. Diodes offers the automotive-grade B270Q-13-F variant (separate datasheet DS30021Q) with enhanced testing for temperature cycling, humidity, and vibration. Use B270Q-13-F for under-hood or infotainment power rails.
What is the maximum PCB copper area recommended for thermal performance?
For continuous 2.0A operation at TA = +70°C, Diodes recommends ≥1.2 cm² of 2oz copper connected to both anode and cathode pads. The 15°C/W RθJT assumes terminals held at ambient; doubling copper area reduces effective RθJA by ~30% in still air.
Does B270-13-F have a specified reverse recovery time (trr)?
No - as a Schottky barrier device, B270-13-F has no minority-carrier storage and therefore no defined trr. Its switching is majority-carrier dominated, resulting in effectively zero reverse recovery charge (Qrr ≈ 0), confirmed by typical capacitance-vs-voltage curves and absence of trr in all published specifications.
Can B270-13-F replace B280-13-F in a 48V system?
No - B270-13-F has 70V VRRM, limiting usable DC bus to ≤48V with margin; B280-13-F (80V VRRM) provides necessary headroom for 48V systems with ripple or transient overshoot. Substitution risks premature breakdown during line surges above 70V.
B270-13-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):
- 70 V
- Current - Average Rectified (Io):
- 2A
- Voltage - Forward (Vf) (Max) @ If:
- 790 mV @ 2 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 7 mA @ 70 V
- Capacitance @ Vr, F:
- 75pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
- Operating Temperature - Junction:
- -65°C ~ 150°C
B270-13-F FAQ
1.How can I place an order for B270-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for B270-13-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 B270-13-F reliable?
The price and inventory of B270-13-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for B270-13-F is usually 5 days.
3.What payment methods are accepted for B270-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for B270-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for B270-13-F?
B270-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your B270-13-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 B270-13-F?
For technical support, including B270-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your B270-13-F requirements.
6.How does Aetrix verify that B270-13-F is sourced from the original manufacturer or authorized distributors?
All B270-13-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 B270-13-F meets industry standards.
7.What is the process for return or replacement of B270-13-F?
All B270-13-F units undergo pre-shipment inspection (PSI). If there is an issue with B270-13-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 B270-13-F part is unused and in its original packaging.
Return procedure for B270-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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