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Diodes Incorporated B140B-13-F
- Part No.:
- B140B-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
B140B-13-F.pdf
- Description:
- DIODE SCHOTTKY 40V 1A SMB
- Quantity:
- Payment:
- Shipping:
Inventory:31,552
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Product details
Overview
B140B-13-F from Diodes Incorporated is a 40 V, 1.0 A surface-mount Schottky barrier rectifier in SMB package, with maximum forward voltage of 0.5 V at 1.0 A and reverse leakage current ≤0.5 mA at rated VR and +25°C. It delivers low power loss for polarity protection and freewheeling in DC/DC converters and USB power circuits.
For engineers reviewing the B140B-13-F datasheet, B140B-13-F pinout, B140B-13-F application, or B140B-13-F equivalent, key selection criteria include its 40 V reverse voltage rating, 30 A non-repetitive surge capability, thermal resistance of 20 °C/W, RoHS-compliant matte tin plating, and suitability for automated SMT assembly.
Technical Context
This Schottky rectifier uses guard ring die construction to enhance transient immunity and supports high-frequency switching up to several MHz due to low junction capacitance (110 pF at 4 V). Its low VF enables efficient operation in low-voltage (<5 V) power rails where conduction loss dominates thermal design.
The device operates across –65 °C to +150 °C and maintains stable IR performance up to +100 °C (≤10 mA), making it suitable for thermally constrained environments such as enclosed industrial controllers and automotive body electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum repetitive reverse voltage before breakdown; sets safe operating limit in 24 V systems with margin. |
| IO | 1.0 A @ TT = +130°C - Continuous average forward current under thermal-limited PCB mounting conditions. |
| VF Max | 0.5 V @ IF = 1.0 A - Low conduction loss reduces heat generation in compact power stages. |
| IR Max | 0.5 mA @ VR = 40 V, TA = +25°C - Minimal leakage preserves battery life in always-on circuits. |
| IFSM | 30 A (8.3 ms half-sine) - Withstands inrush and fault currents without failure in input protection designs. |
| RθJT | 20 °C/W - Junction-to-terminal thermal resistance defines heatsinking requirement on standard 5 mm² copper pad. |
| CT | 110 pF @ VR = 4 V, f = 1 MHz - Low capacitance minimizes switching noise and EMI in high-frequency SMPS. |
Pinout & Package
Package: SMB (Surface-Mount Small Outline Diode), molded plastic, UL 94V-0 rated, cathode indicated by band or notch on top surface. Terminal plating: lead-free matte tin, solderable per MIL-STD-202 Method 208.
| 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 handle full load current and surge. |
| Cathode | Forward current exit point | Connected to higher-potential side (e.g., input rail); marked by band; carries output current and blocks reverse voltage. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Improves ESD and surge robustness without external TVS, reducing BOM count in portable power inputs. |
| Low VF (0.5 V) | Reduces conduction loss by ~40% vs. comparable silicon rectifiers, enabling smaller thermal pads in space-constrained layouts. |
| 30 A IFSM rating | Supports hot-plug and capacitor charging events in USB-C PD and PoE-powered devices without derating. |
| RoHS & Halogen-free compliance | Meets IPC-1752A material declaration requirements for automotive and medical OEMs requiring green sourcing. |
Applications
| USB Power Delivery Input Protection | DC/DC Converter Freewheeling Diode |
|---|---|
Use Scenario: Protects downstream circuitry from reverse polarity during USB-C cable insertion or adapter swap. IC Role / Device Role / Timing Role: Polarity protection diode placed between connector and input capacitor. Use Value: 0.5 V VF limits voltage drop to <2% in 5 V systems, preserving regulation margin while blocking reverse current. |
Use Scenario: Provides low-loss current path during MOSFET off-time in buck converter output stage. IC Role / Device Role / Timing Role: Freewheeling diode synchronized with high-side switch dead time. Use Value: 110 pF CT and fast recovery minimize switching losses and ringing at 500 kHz–1 MHz operation. |
| Industrial Sensor Node Power Rail | Automotive Body Control Module (BCM) |
Use Scenario: Isolates backup battery from main supply in wireless sensor nodes with intermittent wake-up cycles. IC Role / Device Role / Timing Role: Reverse-blocking diode in OR-ing configuration for dual-supply redundancy. Use Value: 0.5 mA IR at +25°C ensures <1 µA standby drain-critical for multi-year battery life in LoRaWAN nodes. |
Use Scenario: Suppresses inductive kickback from solenoid drivers (e.g., door locks, mirror actuators). IC Role / Device Role / Timing Role: Recirculating diode across 12 V inductive loads. Use Value: 30 A IFSM withstands peak transients from 100 ms pulse-width modulated solenoids without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SS34 (Vishay) | Same SMB package, 40 V VRRM, but VF = 0.55 V @ 3 A; higher IF rating (3 A) but larger die size increases RθJT. | Preferred in higher-current (>1.5 A) freewheeling roles; less optimal for ultra-low-VF precision 1 A rails. | Select SS34 only when system requires >1.2 A continuous current or higher surge margin beyond 30 A. |
| SB140 (ON Semiconductor) | SMB package, 40 V VRRM, VF = 0.52 V @ 1 A, IR = 0.6 mA @ 40 V - slightly higher leakage and VF than B140B-13-F. | Acceptable in cost-sensitive consumer power supplies where 0.02 V VF penalty is tolerable. | Choose SB140 if second-source qualification is required and minor efficiency trade-off is acceptable. |
Compared with SS34 and SB140, B140B-13-F offers the lowest VF (0.5 V) and tightest IR spec (0.5 mA) in the 40 V/1 A SMB class, delivering superior efficiency in thermally restricted or battery-critical applications.
Availability
B140B-13-F is available at Aetrix Electronics and suitable for USB power delivery input protection, DC/DC converter freewheeling, and industrial sensor node power rails requiring stable component supply and long-term manufacturability.
Supply support for B140B-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.
B140B-13-F belongs to Diodes' general-purpose Schottky rectifier product line, engineered for commercial and industrial power conversion applications demanding reliability, low loss, and automated assembly compatibility.
FAQ
What is the maximum junction temperature for B140B-13-F?
The absolute maximum junction temperature is +150 °C, with continuous operation supported up to +130 °C terminal temperature. Derating begins above +130 °C per Figure 6 in DS13002, where IO drops linearly to zero at +150 °C under standard PCB mounting (5 mm² copper pad).
Is B140B-13-F suitable for automotive applications?
B140B-13-F is not AEC-Q101 qualified and is intended for commercial-grade use. For automotive applications, Diodes offers AEC-Q101-qualified variants like B140BQ-13-F; consult your local Diodes representative for PPAP-capable alternatives meeting IATF 16949 requirements.
How does the SMB package differ from SMA for B140B-13-F?
B140B-13-F uses the SMB package (larger than SMA), offering higher thermal dissipation (RθJT = 20 °C/W vs. ~25 °C/W for SMA) and 3,000-piece tape-and-reel packaging. Dimensions are 4.06–4.57 mm × 5.00–5.59 mm × 1.52 mm max height, versus SMA's 4.00–4.60 mm × 2.29–2.92 mm footprint.
Can B140B-13-F replace a 1N5819 in existing designs?
Yes - B140B-13-F matches 1N5819's 40 V VRRM and 1 A IO rating, but improves VF (0.5 V vs. typical 0.475–0.575 V) and reduces IR (0.5 mA vs. 1 mA). Layout compatibility is confirmed: SMB footprint aligns with common 1N5819 SMB footprints, though pad dimensions should be verified against Diodes' recommended layout (C = 4.30 mm, X1 = 6.80 mm).
B140B-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):
- 40 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 @ 40 V
- Capacitance @ Vr, F:
- 110pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
- Operating Temperature - Junction:
- -65°C ~ 150°C
B140B-13-F FAQ
1.How can I place an order for B140B-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for B140B-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 B140B-13-F reliable?
The price and inventory of B140B-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 B140B-13-F is usually 5 days.
3.What payment methods are accepted for B140B-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for B140B-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for B140B-13-F?
B140B-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your B140B-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 B140B-13-F?
For technical support, including B140B-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your B140B-13-F requirements.
6.How does Aetrix verify that B140B-13-F is sourced from the original manufacturer or authorized distributors?
All B140B-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 B140B-13-F meets industry standards.
7.What is the process for return or replacement of B140B-13-F?
All B140B-13-F units undergo pre-shipment inspection (PSI). If there is an issue with B140B-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 B140B-13-F part is unused and in its original packaging.
Return procedure for B140B-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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