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Diodes Incorporated B120B-13-F
- Part No.:
- B120B-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
B120B-13-F.pdf
- Description:
- DIODE SCHOTTKY 20V 1A SMB
- Quantity:
- Payment:
- Shipping:
Inventory:14,777
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Product details
Overview
B120B-13-F from Diodes Incorporated is a 20 V, 1.0 A surface-mount Schottky barrier rectifier in SMB package, featuring 0.5 V max forward voltage at 1.0 A and 0.5 mA max reverse leakage at rated VR and +25°C, optimized for low-voltage, high-frequency polarity protection and freewheeling in DC/DC converters.
For engineers reviewing the B120B-13-F datasheet, B120B-13-F pinout, B120B-13-F application, or B120B-13-F equivalent, key selection criteria include its 20 V reverse voltage rating, 30 A non-repetitive surge capability, guard ring die construction for transient immunity, RoHS-compliant matte tin plating, and SMB thermal resistance of 20 °C/W with PCB copper pad heatsinking.
Technical Context
This Schottky rectifier uses a planar guard ring die structure to suppress edge breakdown and improve transient robustness. Its low VF (0.5 V @ 1.0 A) and fast switching (no minority carrier storage) enable high-efficiency operation in low-voltage (<20 V) power rails.
Designed for surface-mount assembly on standard PCBs, it operates across –65°C to +150°C with moisture sensitivity level 1 per J-STD-020. The cathode band marking and SMB mechanical outline (2.00–2.50 mm A dimension, 5.00–5.59 mm E dimension) ensure reliable automated placement and reflow compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 20 V - Maximum repetitive reverse voltage before breakdown; sets upper limit for DC blocking in 12 V systems. |
| IO (AV) | 1.0 A @ TT = +130°C - Continuous average forward current under thermal-limited conditions with PCB heatsink. |
| VF Max | 0.5 V @ IF = 1.0 A - Low conduction loss enabling >92% efficiency in 5–12 V buck converter outputs. |
| IR Max | 0.5 mA @ VR = 20 V, TA = +25°C - Minimal leakage preserves battery life in always-on polarity protection circuits. |
| IFSM | 30 A @ 8.3 ms half-sine - Withstands inrush and fault currents in power supply input stages without failure. |
| RθJT | 20 °C/W - Junction-to-terminal thermal resistance measured with 5.0 mm² × 0.013 mm Cu pad; enables accurate thermal design. |
Pinout & Package
Package: SMB (Surface-Mount Body), molded plastic UL 94V-0, lead-free matte tin terminals, cathode indicated by band or notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., ground or return path) in polarity protection; must be routed with low-inductance trace. |
| Cathode | Forward current exit / reverse-blocking terminal | Marked with band; connects to positive rail in reverse-voltage protection; determines direction of freewheeling current flow. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Suppresses edge avalanche and improves ESD/transient tolerance without external TVS in cost-sensitive designs. |
| Low VF (0.5 V @ 1.0 A) | Reduces conduction loss by ~40% vs. comparable silicon diodes, lowering thermal load in compact DC/DC modules. |
| Surge rating: 30 A peak | Eliminates need for oversized input capacitors or additional overcurrent limiting in 12 V automotive accessory supplies. |
| SMB package with 20 °C/W RθJT | Enables 1.0 A continuous operation with minimal copper area-only 5 mm² of 0.013 mm thick Cu required for thermal compliance. |
Applications
| DC/DC Converter Freewheeling | Polarity Protection |
|---|---|
Use Scenario: Freewheeling path in synchronous or non-synchronous buck converters delivering 3.3–12 V at up to 1 A. IC Role / Device Role / Timing Role: Provides low-loss return path for inductor current during high-side switch off-time; no timing function. Use Value: 0.5 V VF minimizes power dissipation versus silicon alternatives, reducing heatsink requirements in space-constrained modules. |
Use Scenario: Reverse-voltage protection at input of USB-powered peripherals or industrial sensors. IC Role / Device Role / Timing Role: Blocks reverse current flow when power source is misconnected; passive protection element. Use Value: 0.5 mA IR at 20 V ensures <1 µW standby loss-critical for battery-backed IoT nodes. |
| Low-Voltage Inverter Output | Re-circulating Diode in Relay Drivers |
Use Scenario: Output rectification in 12 V AC/DC inverters for LED lighting or small motor drives. IC Role / Device Role / Timing Role: Converts inverted AC output to unidirectional DC; operates at line frequency with fast recovery. Use Value: Schottky architecture eliminates reverse recovery charge, preventing shoot-through losses in transformer-coupled topologies. |
Use Scenario: Suppressing back-EMF spikes across 12 V relay coils in PLC I/O modules. IC Role / Device Role / Timing Role: Clamps inductive kickback voltage to ~0.5 V above rail; no delay or control logic involved. Use Value: 30 A IFSM withstands worst-case coil energy discharge without degradation, extending relay driver lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SB120-E3/54 (Vishay) | Same SMB package, 20 V VRRM, 1.0 A IO, but VF = 0.55 V @ 1.0 A and IR = 1.0 mA @ 20 V. | Higher leakage limits use in ultra-low-power battery monitoring; slightly higher VF increases thermal load at full load. | Select if Vishay's qualification history in industrial temperature cycling is preferred over Diodes' AEC-Q200-aligned process. |
| SS12 (ON Semiconductor) | SMA package (smaller footprint), 20 V VRRM, 1.0 A IO, VF = 0.5 V @ 1.0 A, but RθJT = 30 °C/W and IFSM = 25 A. | Lower surge margin and higher thermal resistance restrict use in high-reliability 12 V automotive loads with frequent cold cranking. | Choose only for space-constrained consumer PCBs where 5 mm² copper pad area is unavailable and surge events are infrequent. |
Compared with SB120-E3/54 and SS12, B120B-13-F delivers superior thermal performance (20 °C/W vs. 30 °C/W) and higher surge tolerance (30 A vs. 25 A), making it better suited for thermally dense 12 V power distribution networks requiring long-term reliability under intermittent overload.
Availability
B120B-13-F is available at Aetrix Electronics and suitable for DC/DC converter freewheeling, polarity protection, and relay recirculation applications requiring stable component supply and consistent SMB packaging across production batches.
Supply support for B120B-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.
B120B-13-F belongs to Diodes' general-purpose Schottky rectifier product line, engineered for commercial and industrial power conversion where low VF, robust surge handling, and automated assembly compatibility are prioritized over automotive-grade qualification.
FAQ
What is the maximum junction temperature for continuous operation?
The B120B-13-F has an operating junction temperature range of –65°C to +150°C. For continuous 1.0 A DC operation, terminal temperature must not exceed +130°C, which corresponds to a maximum allowable junction temperature of +150°C when mounted on a 5.0 mm² copper pad per the datasheet thermal test condition.
Is B120B-13-F suitable for automotive applications?
B120B-13-F is not AEC-Q101 qualified. While it meets commercial temperature and reliability requirements, Diodes Incorporated explicitly states that automotive-grade versions require specific change control, PPAP capability, and IATF 16949 manufacturing-none of which apply to this part number.
How does the guard ring die construction improve reliability?
The guard ring structure surrounds the active junction to distribute electric field stress away from sharp edges, suppressing premature avalanche and improving immunity to ESD and repetitive transients-verified by Diodes' internal testing per IEC 61000-4-2 and JEDEC JESD22-A114.
Can B120B-13-F replace a 1N5817 in existing designs?
Yes-B120B-13-F matches the 1N5817's 20 V VRRM and 1.0 A IO ratings, offers identical SMB footprint compatibility, and improves upon its VF (0.5 V vs. typical 0.475 V) and IFSM (30 A vs. 25 A), provided the PCB pad layout follows Diodes' recommended 4.30 mm × 2.30 mm dimensions.
B120B-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):
- 20 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 500 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 20 V
- Capacitance @ Vr, F:
- 110pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
- Operating Temperature - Junction:
- -65°C ~ 150°C
B120B-13-F FAQ
1.How can I place an order for B120B-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for B120B-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 B120B-13-F reliable?
The price and inventory of B120B-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 B120B-13-F is usually 5 days.
3.What payment methods are accepted for B120B-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for B120B-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for B120B-13-F?
B120B-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your B120B-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 B120B-13-F?
For technical support, including B120B-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your B120B-13-F requirements.
6.How does Aetrix verify that B120B-13-F is sourced from the original manufacturer or authorized distributors?
All B120B-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 B120B-13-F meets industry standards.
7.What is the process for return or replacement of B120B-13-F?
All B120B-13-F units undergo pre-shipment inspection (PSI). If there is an issue with B120B-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 B120B-13-F part is unused and in its original packaging.
Return procedure for B120B-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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