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Diodes Incorporated B120BQ-13-F
- Part No.:
- B120BQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
B120BQ-13-F.pdf
- Description:
- DIODE SCHOTTKY 20V 1A SMB
- Quantity:
- Payment:
- Shipping:
Inventory:7,746
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Product details
Overview
B120BQ-13-F from Diodes Incorporated is a 1.0A, 20V surface-mount Schottky barrier rectifier in SMB package with 0.5V max forward voltage at 1.0A, 0.5mA max reverse leakage at 25°C, and 30A non-repetitive surge rating-used for polarity protection and freewheeling in low-voltage DC/DC converters and automotive body control modules.
For engineers reviewing the B120BQ-13-F datasheet, B120BQ-13-F pinout, B120BQ-13-F application, or B120BQ-13-F equivalent, key selection criteria include its AEC-Q101 qualification, low VF for efficiency-critical 3.3V/5V rail clamping, SMB thermal performance (RθJA = 65°C/W with heatsink), and RoHS-compliant matte tin plating for lead-free reflow compatibility.
Technical Context
This Schottky rectifier employs guard ring die construction to suppress transient-induced junction breakdown and supports high-frequency switching up to 1 MHz with 110 pF typical capacitance at 4V reverse bias. Its low 0.5V forward drop minimizes conduction loss in 12V input–5V output buck converter freewheel paths.
Rated for continuous operation from –65°C to +150°C and qualified to AEC-Q101, it delivers stable reverse leakage (<0.5 mA @ 25°C, <10 mA @ 100°C) and withstands 4 kV HBM ESD-enabling use in under-hood automotive modules where thermal cycling and electrical transients are routine.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 20 V - Maximum repetitive reverse blocking voltage; defines safe DC/peak AC voltage limit before avalanche onset. |
| IO (avg) | 1.0 A @ TT = +130°C - Continuous average forward current rating; determines usable load current in thermally constrained PCB layouts. |
| VF (max) | 0.5 V @ IF = 1.0 A - Peak forward voltage drop; directly sets conduction loss (0.5 W @ 1A) and self-heating in compact power stages. |
| IR (max) | 0.5 mA @ VR = 20 V, TA = +25°C - Maximum reverse leakage; critical for low-power standby circuits where quiescent current must stay below µA-level thresholds. |
| tRR | 12 ns - Reverse recovery time; enables efficient operation in >100 kHz switching converters without significant switching loss penalty. |
| RθJA | 65 °C/W (with 50×50×23 mm Al heatsink) - Junction-to-ambient thermal resistance; allows accurate junction temperature prediction for reliability margining. |
Pinout & Package
Package: SMB (Surface Mount Body), molded plastic case per JEDEC DO-214AA, UL 94V-0 rated, with cathode band polarity marking and matte tin–plated terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side of circuit (e.g., switch node in buck converter); requires adequate copper pour for thermal dissipation. |
| Cathode | Forward current exit / reverse blocking terminal | Connected to higher-potential rail (e.g., output capacitor positive); cathode band identifies this terminal on top surface. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Suppresses edge breakdown during voltage transients-enables robust operation in automotive load-dump environments (ISO 7637-2 Pulse 5a). |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTOL, and ESD-supports PPAP documentation for Tier-1 production. |
| Low VF (0.5 V @ 1A) | Reduces forward power loss by ~30% vs. comparable silicon diodes-extends battery life in portable 5V USB-powered systems. |
| 30A IFSM rating | Withstands short-duration inrush currents (e.g., capacitor charging at power-up) without degradation-eliminates need for upstream fusing in many designs. |
Applications
| Automotive Body Control Module | USB-C Power Delivery Clamp |
|---|---|
Use Scenario: Polarity protection on 12V supply input to BCM microcontroller subsystem. IC Role / Device Role / Timing Role: Unidirectional blocking diode preventing reverse connection damage. Use Value: 0.5V VF ensures <0.5W loss at 1A fault current; AEC-Q101 rating guarantees operation across –40°C to +125°C ambient. |
Use Scenario: Reverse-current blocking between dual-source USB-C PD ports sharing a common VBUS rail. IC Role / Device Role / Timing Role: Freewheel diode isolating independent power paths during source negotiation. Use Value: 12 ns tRR prevents shoot-through during rapid 3A/20V source swaps; SMB footprint fits tight 4mm² board area constraints. |
| Industrial 24V PLC I/O Protection | Low-Voltage DC/DC Converter Freewheel |
Use Scenario: Input protection for 24V digital input channels exposed to field wiring reversals. IC Role / Device Role / Timing Role: Blocking diode in series with optocoupler input LED string. Use Value: 0.5mA IR max at 25°C avoids false triggering in high-impedance sensing; RoHS/Green compliance meets EU industrial directives. |
Use Scenario: Freewheel path in 5V-output synchronous buck converter with 500 kHz switching frequency. IC Role / Device Role / Timing Role: Low-loss return path for inductor current during high-side FET off-time. Use Value: 110 pF CT minimizes capacitive loading on switch node; 65°C/W RθJA enables 1A continuous operation without forced air. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SB120-E3/52T | Same 20V VRRM, 1A IO, but SMA package (RθJA = 115°C/W unheatsinked); VF = 0.5V @ 1A; no AEC-Q101 qualification. | Preferred for cost-sensitive consumer PCBs with minimal thermal budget; unsuitable for automotive under-hood use. | Select when board space permits larger pad layout and AEC-Q101 is not required. |
| SS12-A | SMB package, 20V VRRM, 1A IO, VF = 0.55V @ 1A, IR = 0.5mA @ 25°C, but only industrial temp range (–55°C to +125°C), no AEC-Q101. | Valid for commercial/industrial power supplies; lacks automotive qualification and extended 150°C storage capability. | Choose for non-automotive 5V/12V adapter designs where full AEC-Q101 traceability is unnecessary. |
Compared with SB120-E3/52T and SS12-A, B120BQ-13-F uniquely combines AEC-Q101 qualification, SMB thermal performance (65°C/W with heatsink), and guaranteed 0.5V VF at 1A-making it the only option qualified for automotive BCM and ADAS domain controller auxiliary rails.
Availability
B120BQ-13-F is available at Aetrix Electronics and suitable for automotive body control modules, USB-C power delivery systems, industrial PLC I/O protection, and low-voltage DC/DC converter freewheeling requiring stable component supply across extended temperature ranges and automotive qualification.
Supply support for B120BQ-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, specializing in high-reliability components for automotive, industrial, and computing markets since 1960.
B120BQ-13-F belongs to Diodes' AEC-Q101-qualified Schottky rectifier product line, engineered specifically for polarity protection, freewheeling, and reverse-current blocking in harsh-environment automotive and industrial power systems.
FAQ
What is the maximum junction temperature for continuous operation?
The B120BQ-13-F has an operating junction temperature range of –65°C to +150°C. For continuous 1.0A operation, thermal design must ensure TJ does not exceed +150°C-achievable with the specified 50mm×50mm×23mm aluminum heatsink yielding RθJA = 65°C/W, or via PCB copper thermal vias in high-density layouts.
Is this part suitable for use in a 5V USB power path?
Yes-its 20V VRRM provides 4× margin over 5V USB specifications, 0.5V VF minimizes voltage drop in 1A charging paths, and AEC-Q101 qualification ensures robustness against hot-plug transients. The SMB package's 0.093g mass and RoHS-compliant matte tin plating support reliable lead-free reflow assembly in USB-C port modules.
How does the guard ring construction improve reliability?
The guard ring die structure distributes electric field stress away from the active junction periphery, suppressing premature edge avalanche during load-dump pulses (e.g., ISO 7637-2 Pulse 5a). This extends device lifetime in automotive 12V systems where repeated 60V/100ms transients occur, confirmed by AEC-Q101 transient overload testing.
Can B120BQ-13-F replace B120Q-13-F in existing designs?
Yes-B120BQ-13-F is the SMB-package variant of B120Q-13-F (SMA), sharing identical electrical specs (20V VRRM, 1.0A IO, 0.5V VF), AEC-Q101 qualification, and RoHS/Green compliance. Only mechanical layout changes are needed: SMB's larger body (3.3–3.94mm × 4.06–4.57mm) requires updated footprint and stencil apertures.
B120BQ-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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
- Operating Temperature - Junction:
- -65°C ~ 150°C
B120BQ-13-F FAQ
1.How can I place an order for B120BQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for B120BQ-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 B120BQ-13-F reliable?
The price and inventory of B120BQ-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 B120BQ-13-F is usually 5 days.
3.What payment methods are accepted for B120BQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for B120BQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for B120BQ-13-F?
B120BQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your B120BQ-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 B120BQ-13-F?
For technical support, including B120BQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your B120BQ-13-F requirements.
6.How does Aetrix verify that B120BQ-13-F is sourced from the original manufacturer or authorized distributors?
All B120BQ-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 B120BQ-13-F meets industry standards.
7.What is the process for return or replacement of B120BQ-13-F?
All B120BQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with B120BQ-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 B120BQ-13-F part is unused and in its original packaging.
Return procedure for B120BQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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