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Diodes Incorporated B220AF-13
- Part No.:
- B220AF-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-221AC, SMA Flat Leads
- Datasheet:
-
B220AF-13.pdf
- Description:
- DIODE SCHOTTKY 20V 2A SMAF
- Quantity:
- Payment:
- Shipping:
Inventory:9,964
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Product details
Overview
B220AF-13 from Diodes Incorporated is a 20 V, 2 A surface-mount Schottky barrier rectifier in SMAF package, featuring 0.50 V max forward voltage at 2 A and 0.10 mA max reverse leakage at 20 V/25°C, optimized for boost, blocking, and recirculating diode roles in DC-DC converters and power supplies.
For engineers reviewing the B220AF-13 datasheet, B220AF-13 pinout, B220AF-13 application, or B220AF-13 equivalent, key selection criteria include low VF for efficiency, high-temperature IR stability, RoHS-compliant lead-free construction, and SMAF thermal performance in space-constrained power stages.
Technical Context
This Schottky rectifier uses a planar metal-semiconductor junction to achieve low forward conduction loss and fast switching with no minority-carrier storage delay. Its 20 V VRRM rating targets low-voltage DC-DC output rectification where reverse recovery time is irrelevant but forward drop and thermal leakage are critical.
The device operates across –55°C to +150°C with RθJA = 90°C/W on FR-4 PCBs, and exhibits stable 0.01 mA IR at 20 V/25°C rising to 0.10 mA at 20 V/125°C - enabling reliable operation in thermally demanding environments without thermal runaway.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 20 V - Maximum repetitive reverse voltage before breakdown; sets safe operating limit in 12 V–15 V output rails. |
| IO (AV) | 2 A - Average forward current rating; supports continuous 2 A load in standard PCB layouts with derating above 75°C ambient. |
| VF (max) | 0.50 V @ 2 A, 25°C - Low conduction loss enables >95% efficiency in 5 V–12 V buck/boost stages. |
| IR (max) | 0.10 mA @ 20 V, 25°C - Minimal leakage preserves standby power budget and avoids thermal instability at elevated temperatures. |
| RθJA | 90 °C/W - Thermal resistance defines junction temperature rise under 2 A load; requires ≥0.2"×0.25" copper pad for rated current. |
| Junction Cap. | 93 pF @ 4 V, 1 MHz - Low capacitance minimizes switching node ringing and EMI in high-frequency (>500 kHz) converters. |
Pinout & Package
Package: SMAF (Surface-Mount Axial Flat), molded plastic case with matte tin–annealed copper leadframe, cathode band marking, UL 94V-0 flammability rating, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to input/source side of rectifier; must handle full 2 A RMS current and associated I²R heating. |
| Cathode | Forward current exit / reverse blocking terminal | Marked by band; connects to output/load; sustains 20 V reverse bias with <0.1 mA leakage at room temperature. |
Key Features
| Feature | Design Value |
|---|---|
| Low VF (0.50 V max @ 2 A) | Reduces conduction loss by ~40% vs. standard PN rectifiers, directly improving converter efficiency and reducing heatsink requirements. |
| Stable high-temp IR | 0.10 mA @ 25°C rising only to 0.16 mA @ 125°C (extrapolated), preventing thermal runaway in sealed or high-ambient enclosures. |
| Lead-free & Halogen-free | Meets RoHS 2 and JEDEC J-STD-020 Level 1; eliminates toxic elements while maintaining solderability and long-term reliability. |
| SMAF footprint compatibility | Standardized 2.25–2.95 mm D dimension allows direct replacement of SMA/SMB devices with improved thermal resistance over SMA. |
Applications
| DC-DC Boost Converter Output Stage | USB Power Delivery Input Protection |
|---|---|
Use Scenario: Rectifying switched output in 5 V–12 V boost converters powering industrial sensors or IoT nodes. IC Role / Device Role: Output rectifier handling 2 A pulsed current with minimal forward loss and fast turn-off. Use Value: 0.50 V VF reduces power loss to ≤1 W at 2 A, lowering thermal stress and enabling compact PCB layout without forced air cooling. | Use Scenario: Reverse-polarity and backfeed protection at USB-C PD input ports in portable medical monitors. IC Role / Device Role: Blocking diode preventing battery discharge into upstream source during fault conditions. Use Value: 0.10 mA IR at 20 V ensures <2 µW standby leakage, preserving battery life over multi-week idle periods. |
| Automotive LED Driver Recirculation Path | Industrial PLC Digital Input Clamp |
Use Scenario: Freewheeling path for inductive current in 12 V automotive LED drivers during PWM dimming cycles. IC Role / Device Role: Recirculating diode providing low-loss return path for coil energy during switch-off. Use Value: 93 pF junction capacitance limits voltage overshoot and EMI generation during 100 kHz+ PWM transitions. | Use Scenario: Input protection clamp on 24 V digital input channels in programmable logic controllers exposed to field wiring transients. IC Role / Device Role: Blocking diode isolating input circuitry from reverse-connected field wiring or induced surges. Use Value: –55°C to +150°C operating range ensures functionality across engine bay or factory floor temperature extremes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SS22 (Microchip) | Same 20 V/2 A rating, VF = 0.55 V max @ 2 A, RθJA = 100°C/W, SMA package | Higher VF increases conduction loss by ~100 mW at 2 A; slightly larger thermal footprint required | Select when legacy SMA board space is fixed and 0.05 V VF penalty is acceptable |
| SB220 (ON Semiconductor) | 20 V/2 A, VF = 0.52 V max @ 2 A, IR = 0.15 mA @ 20 V/25°C, SMA package | 0.05 mA higher IR may impact ultra-low-power standby designs at elevated ambient temperatures | Prefer for cost-sensitive consumer applications where 0.15 mA IR is within system leakage budget |
Compared with SS22 and SB220, B220AF-13 delivers the lowest VF (0.50 V) and tightest IR (0.10 mA), making it optimal for thermally constrained, high-efficiency 2 A rectification where junction temperature control and standby power are design-critical.
Availability
B220AF-13 is available at Aetrix Electronics and suitable for DC-DC boost converters, USB power delivery protection circuits, automotive LED drivers, and industrial PLC input clamping requiring stable component supply and consistent RoHS-compliant manufacturing.
Supply support for B220AF-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, specializing in high-reliability power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.
The B220AF-13 belongs to Diodes' advanced Schottky rectifier product line, engineered specifically for high-efficiency, high-temperature-stable rectification in compact surface-mount power supplies and battery-powered systems.
FAQ
What is the maximum junction temperature for continuous operation?
The B220AF-13 is rated for continuous operation from –55°C to +150°C junction temperature. At 2 A average current on a standard FR-4 PCB with 0.2" × 0.25" copper pad, junction temperature rise is approximately 180°C above ambient - so ambient must be limited to ≤–30°C for full-rated current. Derating per Figure 4 is mandatory above 75°C ambient.
Is B220AF-13 suitable for synchronous rectification?
No - B220AF-13 is a passive Schottky rectifier, not a MOSFET-based synchronous rectifier controller or driver. It lacks gate drive capability and cannot replace active synchronous rectification ICs. It functions only as a unidirectional, self-commutating rectifying element in flyback, boost, or buck-derived topologies.
Does the SMAF package require special reflow profile considerations?
Yes - the SMAF package has moisture sensitivity level 1 per J-STD-020, so baking is not required, but peak reflow temperature must not exceed 260°C for ≤10 seconds. The small 0.036 g mass and thin mold compound demand precise thermal profiling to avoid delamination or solder joint voiding, especially with lead-free SAC305 paste.
How does reverse leakage change at elevated temperature?
At 20 V reverse bias, IR rises from 0.01 mA at 25°C to 0.10 mA at 125°C (per datasheet Table "Leakage Current"). This 10× increase remains well below thermal runaway thresholds due to the Schottky barrier's intrinsic low activation energy, enabling stable operation up to 150°C junction temperature without positive feedback.
B220AF-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-221AC, SMA Flat Leads
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 20 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:
- 100 µA @ 20 V
- Capacitance @ Vr, F:
- 93pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMAF
- Operating Temperature - Junction:
- -55°C ~ 150°C
B220AF-13 FAQ
1.How can I place an order for B220AF-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for B220AF-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 B220AF-13 reliable?
The price and inventory of B220AF-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for B220AF-13 is usually 5 days.
3.What payment methods are accepted for B220AF-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for B220AF-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for B220AF-13?
B220AF-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your B220AF-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 B220AF-13?
For technical support, including B220AF-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your B220AF-13 requirements.
6.How does Aetrix verify that B220AF-13 is sourced from the original manufacturer or authorized distributors?
All B220AF-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 B220AF-13 meets industry standards.
7.What is the process for return or replacement of B220AF-13?
All B220AF-13 units undergo pre-shipment inspection (PSI). If there is an issue with B220AF-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 B220AF-13 part is unused and in its original packaging.
Return procedure for B220AF-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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