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Diodes Incorporated B140HW-7
- Part No.:
- B140HW-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- SOD-123
- Datasheet:
-
B140HW-7.pdf
- Description:
- DIODE SCHOTTKY 40V 1A SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:29,775
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Product details
Overview
B140HW from Diodes Incorporated is a 1.0A surface-mount Schottky barrier rectifier in SOD-123 package, rated for 40V peak repetitive reverse voltage and 0.52V typical forward voltage at 1A/25°C. It features guard ring die construction for transient protection, low leakage (≤0.2µA at 5V), and operates from –65°C to +150°C. Used in DC-DC converter output rectification and low-voltage power supplies.
For engineers reviewing the B140HW datasheet, B140HW pinout, B140HW application, or B140HW equivalent, key selection criteria include forward voltage drop at 1A, thermal resistance (250°C/W), reverse leakage at elevated temperature, and SOD-123 footprint compatibility with space-constrained PCB layouts.
Technical Context
This Schottky diode leverages platinum-silicide or similar low-barrier metal-semiconductor junction technology to achieve fast switching (no minority carrier storage) and minimal forward conduction loss. Its guard ring structure enhances ruggedness against voltage transients without requiring external snubbers.
Designed for low-voltage, high-efficiency rectification, it delivers stable performance up to 100°C junction temperature with VF drift of only +0.03V from 25°C to 100°C at 1A. Reverse recovery time is effectively zero due to majority-carrier conduction mechanism.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum repetitive reverse voltage before breakdown; sets safe operating limit in 3.3V–24V rail applications. |
| IF(AV) | 1.0 A - Average forward current rating at 25°C ambient on 1-inch² 2oz copper pad; defines continuous DC output capability. |
| VF @ 1A, 25°C | 0.52 V - Forward voltage drop determines conduction loss (0.52W at 1A); critical for thermal budget in compact designs. |
| IR @ 40V, 25°C | ≤0.2 µA - Ultra-low reverse leakage preserves battery life and minimizes standby power in always-on circuits. |
| RθJA | 250 °C/W - Thermal resistance from junction to ambient; used to calculate max junction temp rise under load (e.g., +250°C rise at 1W). |
| TJ Range | –65°C to +150°C - Wide operating temperature range supports automotive under-hood and industrial control environments. |
Pinout & Package
Package: SOD-123 - Surface-mount plastic case, 2.65mm × 1.55mm × 1.05mm body, cathode-banded polarity, matte tin-plated leads, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., ground or return path) in rectifier configuration. |
| Cathode | Forward current exit / reverse blocking terminal | Marked with band; connects to positive output rail; blocks reverse voltage up to 40V. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Improves surge robustness against 16A non-repetitive forward surge (8.3ms half-sine), reducing need for external TVS in cost-sensitive designs. |
| Low VF at 100°C | 0.51 V - Minimal increase from room-temp VF ensures consistent efficiency in thermally stressed environments. |
| Halogen & antimony free | Meets "Green" definition (<900ppm Br, <900ppm Cl, <1000ppm Sb); supports RoHS 3 and automotive ELV compliance. |
| SOD-123 footprint | Standardized 2-pin outline compatible with automated pick-and-place and reflow; enables direct replacement of legacy 1A Schottkys. |
Applications
| DC-DC Converter Output Rectification | USB Power Delivery Interface |
|---|---|
Use Scenario: Secondary-side rectification in buck or flyback converters supplying 3.3V/5V rails to microcontrollers and sensors. IC Role / Device Role / Timing Role: Unidirectional current valve converting AC-like switch-node waveform to regulated DC output. Use Value: 0.52V VF reduces conduction loss by ~30% vs. standard PN diodes, improving efficiency by 2–4% at 1A load. | Use Scenario: Reverse-polarity protection and load-switch isolation in USB Type-A/C power input paths. IC Role / Device Role / Timing Role: Low-loss series blocking diode preventing backfeed from downstream devices into host port. Use Value: ≤0.2µA leakage at 5V ensures negligible standby drain on battery-powered hosts during sleep mode. |
| Automotive Body Control Module (BCM) | Industrial Sensor Signal Conditioning |
Use Scenario: Reverse-battery protection and EMI filtering clamp in 12V supply inputs of lighting controllers and door modules. IC Role / Device Role / Timing Role: Transient-tolerant front-end rectifier absorbing load-dump spikes up to 16A (8.3ms). Use Value: Guard ring design sustains operation without derating across –40°C to +125°C ambient, meeting AEC-Q101 stress test requirements. | Use Scenario: Power rail decoupling and signal-path clamping in 4–20mA transmitter circuits powered from 24V loop supplies. IC Role / Device Role / Timing Role: Low-capacitance (≈50pF at 0V) shunt element limiting overvoltage transients on analog signal lines. Use Value: 40V VRRM provides 2× margin over 24V nominal rail, while 0.52V VF avoids forward conduction during normal operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SB140-E3/52 (Vishay) | Same 40V/1A rating, but VF = 0.55V @ 1A/25°C; RθJA = 275°C/W; no guard ring specified. | Lacks documented transient protection; less suitable for automotive load-dump scenarios. | Prefer B140HW where surge immunity or tighter VF tolerance is required. |
| 1N5817TR (ON Semiconductor) | Higher VF = 0.475V min but 0.6V max @ 1A; wider VF distribution; TO-277 package (larger than SOD-123). | TO-277 requires larger PCB area; higher VF variation impacts thermal predictability in production. | Choose B140HW for SOD-123 footprint consistency and guaranteed low-leakage performance. |
Compared with SB140-E3/52 and 1N5817TR, B140HW offers superior transient ruggedness via guard ring, tighter VF control (0.52V typ), and smaller SOD-123 footprint-making it optimal for space-constrained, high-reliability 1A rectification where thermal and surge margins are critical.
Availability
B140HW-7 is available at Aetrix Electronics and suitable for DC-DC converter output rectification, USB power delivery interface protection, and automotive body control module (BCM) supply conditioning requiring stable component supply and long-term lifecycle support.
Supply support for B140HW-7 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.
The B140HW belongs to Diodes' high-reliability Schottky rectifier product line, engineered for efficiency-critical, thermally demanding applications in automotive, industrial, and consumer power systems.
FAQ
What is the maximum junction temperature for continuous operation?
The B140HW has an operating junction temperature range of –65°C to +150°C. For continuous 1.0A operation, junction temperature must remain below +150°C, which requires limiting power dissipation to ≤0.5W using thermal design (e.g., 1-inch² 2oz copper pad yields 250°C/W RθJA).
Is B140HW-7 compliant with automotive qualification standards?
The B140HW is not AEC-Q101 qualified; however, its automotive-compliant variant B140HWQ is separately qualified. B140HW meets RoHS 3, halogen-free, and green material requirements, and shares identical electrical specs and SOD-123 packaging with the Q-grade part.
Can B140HW replace a standard PN rectifier like 1N4001?
No-it is not a direct replacement. While both handle 1A average current, B140HW's 40V VRRM is lower than 1N4001's 50V, and its Schottky nature eliminates reverse recovery but increases leakage. Use only where low VF and fast switching are needed, and reverse voltage stays ≤40V.
What is the recommended PCB pad layout for SOD-123 mounting?
Diodes specifies a suggested SOD-123 pad layout: X = 0.900mm, Y = 0.950mm, X1 = 4.050mm, with 7° chamfered corners and R0.100mm fillets. Full dimensions and land pattern guidelines are published at diodes.com/package-outlines.html under SOD123 outline.
B140HW-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123
- 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:
- 550 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 40 µA @ 40 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
- Operating Temperature - Junction:
- -65°C ~ 125°C
B140HW-7 FAQ
1.How can I place an order for B140HW-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for B140HW-7 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 B140HW-7 reliable?
The price and inventory of B140HW-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for B140HW-7 is usually 5 days.
3.What payment methods are accepted for B140HW-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for B140HW-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for B140HW-7?
B140HW-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your B140HW-7 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 B140HW-7?
For technical support, including B140HW-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your B140HW-7 requirements.
6.How does Aetrix verify that B140HW-7 is sourced from the original manufacturer or authorized distributors?
All B140HW-7 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 B140HW-7 meets industry standards.
7.What is the process for return or replacement of B140HW-7?
All B140HW-7 units undergo pre-shipment inspection (PSI). If there is an issue with B140HW-7, 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 B140HW-7 part is unused and in its original packaging.
Return procedure for B140HW-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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