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Diodes Incorporated BAS70WQ-7-F
- Part No.:
- BAS70WQ-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BAS70WQ-7-F.pdf
- Description:
- DIODE SCHOTT 70V 70MA SOT323 3K
- Quantity:
- Payment:
- Shipping:
Inventory:7,066
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Product details
Overview
BAS70WQ-7-F from Diodes Incorporated is a surface-mount Schottky barrier diode in SOT323 package, rated for 70 V peak repetitive reverse voltage, 70 mA forward current, and 0.41 V max forward voltage at 1 mA. It delivers fast 5.0 ns reverse recovery time and ultra-low 100 nA reverse leakage at 50 V, enabling high-efficiency freewheeling and reverse polarity protection in space-constrained DC-DC converters.
For engineers reviewing the BAS70WQ-7-F datasheet, BAS70WQ-7-F pinout, BAS70WQ-7-F application, or BAS70WQ-7-F equivalent, key selection criteria include its AEC-Q101 qualification, 0.006 g ultra-lightweight construction, 2.0 pF junction capacitance at 0 V, and compatibility with lead-free reflow profiles per J-STD-020D Level 1 moisture sensitivity.
Technical Context
This Schottky diode uses a platinum-silicide (PtSi) barrier structure on silicon to achieve low forward voltage drop and minimal minority-carrier storage, eliminating tail current and enabling nanosecond-scale switching. Its PN junction guard ring suppresses transient-induced edge breakdown and improves ESD robustness beyond standard HBM Class 2.
The device operates across –55 °C to +125 °C and derates linearly above 25 °C ambient, delivering 200 mW power dissipation at room temperature and maintaining <100 nA IR up to 50 V reverse bias - critical for battery-powered reverse-blocking applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 70 V - supports DC-DC output rectification in 48 V industrial bus systems without avalanche stress |
| IF(AV) | 70 mA - suitable for low-power auxiliary rails and bias supplies in compact SMPS designs |
| VF @ 1 mA | 0.41 V max - reduces conduction loss by >30% vs. standard silicon diodes in low-current freewheel paths |
| tRR | 5.0 ns - enables operation at >10 MHz switching frequencies without reverse recovery loss penalty |
| CT @ 0 V | 2.0 pF - minimizes capacitive loading on high-speed gate-drive or signal-clamp nodes |
| IR @ 50 V | 100 nA max - ensures negligible standby leakage in always-on reverse-polarity protection circuits |
| RθJA | 625 °C/W - requires minimal PCB copper area for thermal management on FR-4 substrates |
Pinout & Package
Package: SOT323 - ultra-small plastic surface-mount case (2.15 mm × 2.10 mm × 0.95 mm), UL 94V-0 rated, lead-free matte tin-plated terminals, moisture sensitivity Level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward current entry | Connected to lower-potential node in reverse polarity protection or cathode-side freewheel path |
| Cathode (Pin 2) | Forward current exit / reverse blocking terminal | Connected to input rail or switch-node; withstands 70 V reverse bias with <100 nA leakage |
| Collector/Case (Pin 3) | Thermal and mechanical anchor | Non-electrical; ties die substrate to PCB ground plane for thermal conduction and mechanical stability |
Key Features
| Feature | Design Value |
|---|---|
| PN junction guard ring | Suppresses edge breakdown during ESD transients (IEC 61000-4-2 compliant) and voltage overshoot events |
| AEC-Q101 qualification | Validated for automotive under-hood environments including thermal cycling, humidity, and mechanical shock |
| Halogen & antimony free | Meets "Green" definition: Br+Cl <1500 ppm, Sb <1000 ppm - supports RoHS-compliant end-product certification |
| SOT323 footprint | Enables placement density >2× higher than SOT23 in multi-rail PMIC layouts and portable battery management systems |
Applications
| SMPS Auxiliary Rectification | Reverse Polarity Protection |
|---|---|
Use Scenario: Rectifying low-current auxiliary windings in flyback or forward converters powering control ICs and gate drivers. IC Role / Device Role / Timing Role: Schottky rectifier providing unidirectional current flow with minimal VF-induced loss at 1–10 mA load levels. Use Value: 0.41 V VF at 1 mA cuts conduction loss by 45% vs. 1N4148, improving no-load efficiency and reducing thermal load on small PCB areas. | Use Scenario: In-line protection of USB-C, PoE, or battery-input ports against accidental reverse connection. IC Role / Device Role / Timing Role: Low-leakage blocking diode placed between input connector and system rail, conducting only during correct polarity insertion. Use Value: 100 nA IR at 50 V ensures <1 µW standby power loss - critical for energy-harvesting and coin-cell-powered devices. |
| High-Frequency Freewheeling | Signal-Level Clamping |
Use Scenario: Freewheeling path for synchronous buck converter high-side MOSFET body diode replacement in 1–5 MHz designs. IC Role / Device Role / Timing Role: Fast-recovery Schottky clamp that conducts during low-side switch off-time, minimizing voltage spike and ringing. Use Value: 5.0 ns tRR prevents reverse recovery current overlap with switching transitions, reducing EMI and improving regulation accuracy. | Use Scenario: Input protection clamping for ADC reference pins, op-amp inputs, or microcontroller GPIOs exposed to transient overvoltage. IC Role / Device Role / Timing Role: Low-capacitance (2.0 pF) shunt diode limiting signal swing to ±0.4 V while preserving bandwidth. Use Value: Sub-2 pF CT avoids RC filtering of >100 MHz signals, enabling clamping without degrading rise/fall times in high-speed interfaces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SBAT54LT1G | Higher VF (0.45 V @ 10 mA), same SOT-23 package, 100 mA IF rating | Marginally higher conduction loss in low-current bias rails; better surge handling | Select when higher IFSM (500 mA) is required for infrequent inrush events |
| NSR0230P2T5G | Lower VF (0.33 V @ 100 mA), SOD-523 package (smaller), 200 mA IF rating | Not AEC-Q101 qualified; lacks guard ring; unsuitable for automotive | Select for cost-sensitive consumer electronics where AEC-Q101 and ESD robustness are not mandated |
Compared with SBAT54LT1G and NSR0230P2T5G, BAS70WQ-7-F uniquely balances AEC-Q101 reliability, 70 V VRRM headroom, and sub-0.42 V VF at microamp-level currents - making it optimal for automotive auxiliary supplies and precision reverse-protection circuits where leakage and qualification matter most.
Availability
BAS70WQ-7-F is available at Aetrix Electronics and suitable for SMPS auxiliary rectification, reverse polarity protection, and high-frequency freewheeling applications requiring stable component supply and long-term automotive-grade availability.
Supply support for BAS70WQ-7-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, industry-qualified components for automotive, industrial, and computing markets.
The BAS70WQ series belongs to Diodes' AEC-Q101-qualified Schottky diode product line, engineered specifically for low-leakage, high-speed protection and rectification in space- and power-constrained automotive subsystems.
FAQ
Is BAS70WQ-7-F suitable for automotive applications?
Yes. It is fully AEC-Q101 qualified for automotive use, tested across –55 °C to +125 °C operating range, and PPAP capable. Its PN guard ring provides enhanced ESD immunity (HBM ≥2 kV), and its 70 V VRRM meets ISO 7637-2 pulse test margin requirements for 12 V and 24 V vehicle electrical systems.
What is the thermal performance on standard FR-4 PCB?
When mounted on a 1-inch × 0.85-inch FR-4 board with recommended pad layout, BAS70WQ-7-F achieves 625 °C/W junction-to-ambient thermal resistance. At 25 °C ambient, it safely dissipates 200 mW; derating begins linearly above 25 °C, reaching zero dissipation at 125 °C ambient.
Does BAS70WQ-7-F have a defined anode/cathode marking?
Yes. The device features a molded cathode band on the SOT323 package, aligned with Pin 2 per JEDEC MO-203AA outline. Top-view marking "K73" identifies the BAS70WQ variant; polarity is confirmed in Diodes' package outline DS38384 Rev. 1–2, Figure 1.
Can BAS70WQ-7-F replace BAS70-04W in existing designs?
Yes, with verification. Both share identical SOT323 package, pinout, and 70 V VRRM rating. BAS70WQ-7-F offers tighter VF spec (0.41 V max @ 1 mA vs. 0.45 V for BAS70-04W) and AEC-Q101 qualification - but layout and thermal validation are required due to minor process differences affecting leakage and tRR distribution.
BAS70WQ-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 70 V
- Current - Average Rectified (Io):
- 70mA
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 15 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- 5 ns
- Current - Reverse Leakage @ Vr:
- 100 nA @ 50 V
- Capacitance @ Vr, F:
- 2pF @ 0V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
- Operating Temperature - Junction:
- -55°C ~ 125°C
BAS70WQ-7-F FAQ
1.How can I place an order for BAS70WQ-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BAS70WQ-7-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 BAS70WQ-7-F reliable?
The price and inventory of BAS70WQ-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAS70WQ-7-F is usually 5 days.
3.What payment methods are accepted for BAS70WQ-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAS70WQ-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAS70WQ-7-F?
BAS70WQ-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAS70WQ-7-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 BAS70WQ-7-F?
For technical support, including BAS70WQ-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAS70WQ-7-F requirements.
6.How does Aetrix verify that BAS70WQ-7-F is sourced from the original manufacturer or authorized distributors?
All BAS70WQ-7-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 BAS70WQ-7-F meets industry standards.
7.What is the process for return or replacement of BAS70WQ-7-F?
All BAS70WQ-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BAS70WQ-7-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 BAS70WQ-7-F part is unused and in its original packaging.
Return procedure for BAS70WQ-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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