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Diodes Incorporated B270-13
- Part No.:
- B270-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
B270-13.pdf
- Description:
- DIODE SCHOTTKY 70V 2A SMB
- Quantity:
- Payment:
- Shipping:
Inventory:6,046
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Product details
Overview
B270-13 from Diodes Incorporated is a 2.0A, 70V Schottky barrier rectifier in SMB package, featuring low forward voltage (0.79 V @ 2.0 A, 25°C), 50 A non-repetitive surge rating, and 15 °C/W junction-to-terminal thermal resistance. It is used for polarity protection and free-wheeling in DC-DC converters and low-voltage AC/DC adapters.
For engineers reviewing the B270-13 datasheet, B270-13 pinout, B270-13 application, or B270-13 equivalent, key selection factors include forward voltage drop at rated current, thermal resistance under PCB-mount conduction cooling, surge robustness in inductive switching, and RoHS-compliant lead-free plating compatibility with automated reflow.
Technical Context
This discrete Schottky diode uses guard ring die construction to enhance transient immunity and reduce leakage under reverse bias. Its low VF and fast recovery enable high-efficiency operation in 100 kHz–1 MHz switching power supplies without snubbers.
Designed for surface-mount assembly on FR-4 PCBs, it relies on terminal-to-PCB copper area for thermal dissipation-junction temperature must stay ≤125°C at 2.0 A average current per derating curve. Cathode band marking defines polarity for unidirectional current flow.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 70 V - Maximum repetitive reverse voltage before breakdown; sets safe operating limit in 48 V bus polarity protection |
| IO @ TT=125°C | 2.0 A - Continuous average forward current with terminal temperature held at 125°C; requires ≥1 cm² 2-oz copper pad |
| VFM @ 2.0 A, 25°C | 0.79 V - Forward voltage drop defining conduction loss; contributes ~1.6 W dissipation at full load |
| IFSM (8.3 ms) | 50 A - Surge withstand capability during motor startup or output short-circuit events |
| RJT | 15 °C/W - Junction-to-terminal thermal resistance; enables direct thermal modeling from terminal temp to junction |
| CT @ 1 MHz, 4 V | 75 pF - Junction capacitance affecting high-frequency noise coupling and EMI filter design |
| IRM @ 25°C | 0.5 mA - Reverse leakage at rated blocking voltage; impacts standby power in always-on circuits |
Pinout & Package
SMB (DO-214AA) surface-mount package: molded plastic case (UL 94V-0), cathode band marking, solderable matte tin terminals. Dimensions: 3.30–3.94 mm (L) × 4.06–4.57 mm (W) × 1.96–2.21 mm (H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., ground or return path) in rectification or freewheeling |
| Cathode | Forward current exit / reverse-blocking node | Marked with band; connects to positive rail or switch node; blocks reverse current up to 70 V |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Improves surge immunity and reduces parameter drift under transient stress (e.g., load dump) |
| Low VF at high current | 0.79 V @ 2.0 A minimizes I²R losses in compact 5–12 V DC-DC outputs |
| High surge rating | 50 A peak allows use in flyback snubberless designs without external TVS |
| RoHS-compliant finish | Matte tin plating supports Pb-free reflow (260°C/10 s) and eliminates post-solder cleaning |
| Thermal performance | 15 °C/W RJT enables accurate junction temp estimation using measured terminal temperature |
Applications
| DC-DC Converter Output Rectification | Automotive Body Control Module Power Input |
|---|---|
Use Scenario: Secondary-side rectification in 5 V/3 A buck converter supplying microcontroller and CAN transceiver rails. IC Role / Device Role / Timing Role: Unidirectional current valve converting switched AC to regulated DC; no timing function. Use Value: 0.79 V VF reduces conduction loss by ~35% vs. standard PN diode, improving efficiency from 88% to 91% at full load. | Use Scenario: Polarity protection at 12 V battery input of BCM housing LIN, CAN, and LED drivers. IC Role / Device Role / Timing Role: Reverse-current blocker preventing damage during battery misconnection. Use Value: 70 V VRRM exceeds automotive load-dump spikes (ISO 7637-2 Pulse 5a), eliminating need for upstream TVS. |
| Industrial Sensor Node Power Path | USB-C PD Adapter Secondary Side |
Use Scenario: Free-wheeling path for 24 V solenoid driver IC with inductive kickback energy recovery. IC Role / Device Role / Timing Role: Energy recirculation path clamping inductive voltage spike during MOSFET turn-off. Use Value: 50 A IFSM handles 10× rated coil current surges without degradation, extending system reliability. | Use Scenario: Synchronous rectification replacement in 20 V/3 A USB-C PD adapter secondary stage. IC Role / Device Role / Timing Role: Low-loss unidirectional conduction element replacing active MOSFET gate control complexity. Use Value: 75 pF CT limits high-frequency ringing during 300 kHz switching, easing EMI filter design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SB270-E3/52 (Vishay) | Same SMB package, 70 V VRRM, but VF = 0.85 V @ 2 A and RJT = 18 °C/W | Higher conduction loss and reduced thermal margin in high-density layouts | Prefer B270-13 where board space limits copper area or ambient exceeds 60°C |
| SS27 (ON Semiconductor) | SMB package, 70 V VRRM, VF = 0.75 V @ 2 A, but IFSM = 40 A and IRM = 1.0 mA @ 25°C | Lower VF improves efficiency, but reduced surge rating limits use in motor-driven loads | Choose SS27 only when surge events are absent and lowest possible VF is critical |
Compared with SB270-E3/52 and SS27, B270-13 delivers optimal balance of low VF (0.79 V), high surge (50 A), and thermal resistance (15 °C/W), making it preferred for space-constrained industrial power supplies with mixed load profiles.
Availability
B270-13 is available at Aetrix Electronics and suitable for DC-DC converter output rectification, automotive polarity protection, and industrial sensor node power paths requiring stable component supply across multi-year production cycles.
Supply support for B270-13 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 centers across Asia and manufacturing in China, Taiwan, and the Philippines.
The B270 series belongs to Diodes' high-reliability Schottky rectifier product line, engineered for efficiency-critical 5–48 V power conversion in automotive, industrial, and consumer power supplies.
FAQ
What is the maximum allowable PCB copper area for thermal management of B270-13?
B270-13 requires ≥1 cm² of 2-ounce copper connected directly to both terminals for full 2.0 A current rating at 125°C terminal temperature. Smaller pads reduce current capacity per Fig. 1 derating curve-e.g., 0.5 cm² limits continuous current to ~1.4 A at 25°C ambient.
Is B270-13 suitable for synchronous rectification replacement in 300 kHz SMPS?
Yes-its 75 pF junction capacitance and <10 ns reverse recovery support 300 kHz operation without excessive ringing. However, unlike MOSFET-based synchronous rectifiers, it lacks gate control and cannot achieve zero-voltage switching; best suited where simplicity and cost outweigh peak efficiency gains.
Does B270-13 meet AEC-Q101 for automotive use?
No-B270-13 is not AEC-Q101 qualified. While widely used in automotive body electronics, its qualification covers JESD22-A108 reliability testing only. For AEC-Q101-compliant alternatives, consider Diodes' APx70 series Schottky rectifiers with full automotive qualification documentation.
How does the guard ring construction improve transient performance?
The guard ring reduces electric field crowding at the silicon edge, raising the effective breakdown voltage during fast transients like ISO 7637-2 Pulse 5a. This suppresses localized avalanche and prevents parametric shift or catastrophic failure under 50 A surge conditions, confirmed by JEDEC-tested IFSM validation.
B270-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-214AA, SMB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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 FAQ
1.How can I place an order for B270-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for B270-13 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 B270-13 reliable?
The price and inventory of B270-13 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 is usually 5 days.
3.What payment methods are accepted for B270-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for B270-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for B270-13?
B270-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your B270-13 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 B270-13?
For technical support, including B270-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your B270-13 requirements.
6.How does Aetrix verify that B270-13 is sourced from the original manufacturer or authorized distributors?
All B270-13 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 B270-13 meets industry standards.
7.What is the process for return or replacement of B270-13?
All B270-13 units undergo pre-shipment inspection (PSI). If there is an issue with B270-13, 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 B270-13 part is unused and in its original packaging.
Return procedure for B270-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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