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Diodes Incorporated B150AF-13
- Part No.:
- B150AF-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-221AC, SMA Flat Leads
- Datasheet:
-
B150AF-13.pdf
- Description:
- DIODE SCHOTTKY 50V 1A SMAF
- Quantity:
- Payment:
- Shipping:
Inventory:9,342
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Product details
Overview
B150AF-13 from Diodes Incorporated is a 1.0A, 50V Schottky barrier rectifier in SMAF package with max 0.65V forward voltage at 1A/25°C, 0.10mA reverse leakage at 50V/25°C, and thermal resistance of 95°C/W (J-A); used as boost diode in DC-DC converters for power supply efficiency.
For engineers reviewing the B150AF-13 datasheet, B150AF-13 pinout, B150AF-13 application, or B150AF-13 equivalent, this page delivers verified electrical specs, thermal behavior at +125°C, junction capacitance (45pF @ 4V), polarity marking (cathode band), and RoHS-compliant lead finish - all critical for high-temperature rectification design.
Technical Context
This Schottky rectifier operates with low forward voltage drop to minimize conduction loss in switching power supplies, and maintains stable reverse leakage up to +150°C junction temperature - essential for automotive under-hood and industrial power conversion where thermal runaway must be avoided.
Its SMAF surface-mount package features matte tin-annealed copper leadframe, UL 94V-0 molding compound, and moisture sensitivity level 1; designed for automated assembly on FR-4 PCBs with 0.2" × 0.25" copper pad per JEDEC standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - Maximum repetitive reverse voltage before breakdown; sets safe blocking margin in 24V–48V input DC-DC stages. |
| IO(AVG) | 1.0 A - Continuous average forward current rating; defines usable output current in boost/flyback rectification. |
| VF(MAX) | 0.65 V @ 1A, 25°C - Peak forward voltage; directly determines conduction loss (0.65W at 1A) and thermal rise. |
| IR(MAX) | 0.10 mA @ 50V, 25°C - Max reverse leakage; ensures minimal standby power loss in battery-backed systems. |
| RθJA | 95 °C/W - Junction-to-ambient thermal resistance on standard FR-4; enables derating to ~0.7A at +70°C ambient. |
| CT | 45 pF @ 4V, 1MHz - Junction capacitance; impacts high-frequency switching noise and EMI filter design. |
Pinout & Package
SMAF (Surface Mount Axial Flat) package: 2-terminal SMD device with cathode band marking; dimensions: 4.00mm × 2.25–2.95mm × 0.90–1.10mm height; weight ≈ 0.036g; RoHS-compliant matte tin finish over copper leadframe.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to source/switch node in boost topology; requires low-inductance layout to limit voltage spikes. |
| Cathode | Forward current exit / reverse blocking terminal | Marked by band; ties to output capacitor; reverse voltage rating (50V) defines maximum output swing headroom. |
Key Features
| Feature | Design Value |
|---|---|
| Low VF at high temperature | 0.50 V @ 1A, +125°C - Enables stable efficiency in thermally constrained enclosures without forced cooling. |
| High-temp IR stability | 0.015 mA @ 50V, +125°C - Reduces risk of thermal runaway in 85–125°C ambient environments. |
| Green compound packaging | Halogen- and antimony-free (<900ppm Br/Cl, <1000ppm Sb) - Meets IEC 61249-2-21 and IPC-4101D environmental compliance. |
| Solderability assurance | MIL-STD-202, Method 208 compliant - Guarantees reliable reflow joint formation on production PCBs. |
Applications
| Boost Diode in DC-DC Converters | Blocking Diode in Solar Charge Controllers |
|---|---|
Use Scenario: Used in non-synchronous boost converter output stage to rectify switched inductor current into regulated 12V/24V rail. IC Role / Device Role: Unidirectional current path enabling energy transfer while blocking reverse current during switch-off phase. Use Value: 0.65V VF minimizes power loss vs. silicon diodes (~1.1V), improving converter efficiency by ≥3% at 1A load. | Use Scenario: Placed between photovoltaic panel and battery to prevent nighttime discharge through panel junctions. IC Role / Device Role: Reverse-polarity isolation element ensuring zero reverse current under dark conditions. Use Value: 0.10mA IR at 25°C and <0.02mA at 85°C limits parasitic drain, extending battery runtime in off-grid systems. |
| Recirculating Diode in Relay Drivers | Output Rectifier in AC-DC Adapters |
Use Scenario: Connected across relay coil to clamp inductive kickback when driver MOSFET turns off. IC Role / Device Role: Freewheeling path absorbing stored magnetic energy, protecting switching transistor. Use Value: 30A IFSM rating handles transient surge without degradation; fast recovery avoids oscillation in snubberless designs. | Use Scenario: Secondary-side rectifier in 5–12W wall adapters converting transformer output to DC. IC Role / Device Role: High-frequency rectification element after center-tapped or full-wave transformer winding. Use Value: 45pF CT reduces high-frequency ringing, easing EMI filter requirements and passing CISPR-32 Class B. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SB150-TB-E3/61T (Vishay) | Same 50V VRRM, 1A IO, but VF = 0.72V @ 1A/25°C; RθJA = 100°C/W | Higher conduction loss and thermal resistance reduce usable current in compact layouts | Prefer B150AF-13 where board space or thermal margin is constrained |
| SS15 (ON Semiconductor) | 50V VRRM, 1A IO, VF = 0.55V typ @ 1A/25°C, but IR = 0.5mA @ 50V/25°C | 5× higher reverse leakage limits use in battery-critical or high-temp storage | Choose B150AF-13 for applications requiring <0.15mA IR at elevated temperatures |
Compared with SB150-TB-E3/61T and SS15, B150AF-13 offers superior thermal performance (95°C/W), lower leakage (0.10mA), and tighter VF control (0.65V max), making it optimal for thermally dense, efficiency-sensitive 1A rectification where reliability at +125°C matters.
Availability
B150AF-13 is available at Aetrix Electronics and suitable for DC-DC boost converters, solar charge controllers, relay driver circuits, and AC-DC adapter designs requiring stable component supply with guaranteed long-term sourcing.
Supply support for B150AF-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, serving industrial, computing, consumer, and communications markets since 1959.
The B150AF-13 belongs to Diodes' high-reliability Schottky rectifier product line, engineered specifically for high-efficiency, high-temperature rectification in space-constrained power supplies and renewable energy interfaces.
FAQ
What is the maximum junction temperature for continuous operation of B150AF-13?
The B150AF-13 has an operating junction temperature range of –55°C to +150°C. Continuous operation at +150°C is permitted only if thermal design ensures actual TJ does not exceed this limit - verified via RθJA derating curves showing ≤0.7A IO at +70°C ambient on standard FR-4.
Is B150AF-13 compatible with lead-free reflow soldering profiles?
Yes. The device uses matte tin-annealed copper leadframe and meets J-STD-020 moisture sensitivity level 1. It supports peak reflow temperatures up to 260°C per JEDEC standard, with no pre-baking required prior to assembly.
Does B150AF-13 have a specified reverse recovery time (trr)?
No - as a Schottky barrier rectifier, B150AF-13 exhibits majority-carrier conduction and has no minority-carrier storage delay. Its effective switching is limited only by junction capacitance (45pF) and circuit inductance, eliminating reverse recovery loss entirely.
How is polarity identified on the B150AF-13 SMAF package?
Polarity is marked by a visible cathode band at one end of the SMAF body. When viewed from top with marking code "B150AF" right-reading, the banded end is the cathode; the opposite end is the anode - consistent with industry-standard SMD diode orientation.
B150AF-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):
- 50 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 650 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 100 µA @ 50 V
- Capacitance @ Vr, F:
- 45pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMAF
- Operating Temperature - Junction:
- -55°C ~ 150°C
B150AF-13 FAQ
1.How can I place an order for B150AF-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for B150AF-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 B150AF-13 reliable?
The price and inventory of B150AF-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for B150AF-13 is usually 5 days.
3.What payment methods are accepted for B150AF-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for B150AF-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for B150AF-13?
B150AF-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your B150AF-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 B150AF-13?
For technical support, including B150AF-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your B150AF-13 requirements.
6.How does Aetrix verify that B150AF-13 is sourced from the original manufacturer or authorized distributors?
All B150AF-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 B150AF-13 meets industry standards.
7.What is the process for return or replacement of B150AF-13?
All B150AF-13 units undergo pre-shipment inspection (PSI). If there is an issue with B150AF-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 B150AF-13 part is unused and in its original packaging.
Return procedure for B150AF-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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