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Diodes Incorporated BAS70W-7
- Part No.:
- BAS70W-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BAS70W-7.pdf
- Description:
- DIODE SCHOTTKY 70V 70MA SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:6,949
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Product details
Overview
BAS70W-7 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 5.0 ns reverse recovery time. It features low forward voltage (410 mV at 1 mA), ultra-small footprint, and PN junction guard ring for ESD/transient protection-used in high-speed signal clamping and polarity protection circuits in portable power management.
For engineers reviewing the BAS70W-7 datasheet, BAS70W-7 pinout, BAS70W-7 application, or BAS70W-7 equivalent, key selection criteria include its 70 V VRRM rating, 410–1000 mV VF range across 1–15 mA, 100 nA IR at 50 V, 2.0 pF CT at 0 V, and thermal resistance of 625 °C/W-critical for compact DC-DC converter biasing and USB port protection designs.
Technical Context
The BAS70W-7 employs a planar Schottky junction structure with integrated guard ring to suppress edge breakdown and improve transient robustness. Its low barrier height enables fast switching (trr ≤ 5.0 ns) and low forward conduction loss, while the SOT323 package supports high-density PCB layouts in space-constrained applications.
Designed for operation from –55 °C to +125 °C, it maintains stable reverse leakage (<100 nA at 50 V) and capacitance (≤2.0 pF at 0 V) across temperature, making it suitable for precision signal routing and RF detector bias networks where parasitic capacitance and leakage must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 70 V - Maximum repetitive reverse blocking capability without avalanche breakdown |
| VF @ 1 mA | 410 mV - Low forward drop enabling efficient biasing in low-current signal paths |
| trr | 5.0 ns - Enables use in >100 MHz switching applications such as RF envelope detection |
| IR @ 50 V | 100 nA - Minimal leakage preserves signal integrity in high-impedance sensing nodes |
| CT @ 0 V | 2.0 pF - Low junction capacitance minimizes loading on high-frequency signal lines |
| RθJA | 625 °C/W - Thermal performance defined on standard FR-4 board; limits continuous power to 200 mW |
| TJ Range | –55 to +125 °C - Supports industrial and automotive-adjacent ambient environments |
Pinout & Package
Package: SOT323 - ultra-compact 3-pin surface-mount plastic package (2.0 × 2.225 × 0.9 mm), lead-free, RoHS-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward current entry point | Connected to higher-potential node in clamping or rectification path |
| Cathode (Pin 2) | Forward current exit / reverse voltage reference | Typically tied to ground or lower-potential rail; marked side of package |
| No-connect (Pin 3) | Internal die attach pad (non-functional) | Electrically isolated; used for mechanical anchoring and thermal relief only |
Key Features
| Feature | Design Value |
|---|---|
| Low turn-on voltage | 410 mV at 1 mA enables efficient operation in sub-1 V logic-level protection circuits |
| Fast switching speed | 5.0 ns trr supports high-frequency signal routing without distortion in RF front-ends |
| PN junction guard ring | Enhances ESD robustness (HBM >8 kV typical) and improves voltage standoff uniformity |
| Ultra-small SOT323 package | 0.006 g weight and 2.0 × 2.225 mm footprint ideal for wearables and IoT sensor modules |
Applications
| USB Port Protection | DC-DC Converter Biasing |
|---|---|
Use Scenario: Prevents reverse current flow and voltage transients on USB 2.0 data and VBUS lines during hot-plug events. IC Role / Device Role / Timing Role: Polarity protection diode and ESD clamp at interface connector. Use Value: 70 V VRRM withstands load-dump surges; 100 nA IR avoids leakage-induced battery drain in standby mode. | Use Scenario: Supplies bias current to gate drivers and error amplifiers in synchronous buck converters operating at 500 kHz–2 MHz. IC Role / Device Role / Timing Role: Fast-recovery bootstrap or auxiliary supply diode. Use Value: 5.0 ns trr prevents shoot-through risk; 2.0 pF CT avoids high-frequency coupling into control loop. |
| RF Detector Circuit | Low-Power Sensor Signal Conditioning |
Use Scenario: Rectifies RF envelope signals (e.g., 900 MHz ISM band) for RSSI measurement in wireless receivers. IC Role / Device Role / Timing Role: High-speed signal demodulator diode. Use Value: Low VF and CT preserve small-signal sensitivity; guard ring ensures stable response under RF stress. | Use Scenario: Clamps analog sensor outputs (e.g., thermistor, photodiode) to prevent ADC input overvoltage during ESD events. IC Role / Device Role / Timing Role: Transient voltage suppressor at signal chain front-end. Use Value: 410 mV VF ensures minimal forward offset; 100 nA IR avoids baseline shift in µA-level sensor currents. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NSR0230HT1G | 30 V VRRM, 200 mA IF, 0.45 V VF @ 10 mA - lower voltage rating, higher current capacity | Suitable for 3.3 V/5 V rail clamping only; not viable for 12 V+ systems | Select when higher forward current and lower VF are prioritized over reverse voltage margin |
| RB521S-30T2R | 30 V VRRM, 200 mA IF, 0.35 V VF @ 100 mA - optimized for high-current low-VF, not high-speed | Slower trr (~10 ns) limits use in >50 MHz signal paths; better for power rectification | Prefer for cost-sensitive 3.3 V power rails where speed is secondary to conduction loss |
Compared with NSR0230HT1G and RB521S-30T2R, the BAS70W-7 uniquely balances 70 V blocking, 5 ns speed, and sub-1 V forward drop-making it optimal for mixed-signal interfaces requiring both voltage margin and RF-grade response.
Availability
BAS70W-7 is available at Aetrix Electronics and suitable for USB interface protection, DC-DC converter biasing, RF detector circuits, and low-power sensor signal conditioning requiring stable component supply and consistent parametric performance across production lots.
Supply support for BAS70W-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 and manufacturing operations across Asia and the US.
The BAS70W series belongs to Diodes' high-speed Schottky diode product line, engineered specifically for signal integrity-critical roles in portable, wireless, and power-efficient electronic systems.
FAQ
What is the maximum reverse voltage the BAS70W-7 can block continuously?
The BAS70W-7 has a peak repetitive reverse voltage (VRRM) rating of 70 V. This is the maximum instantaneous reverse voltage it can block repeatedly without breakdown under normal operating conditions at 25 °C ambient. Derating applies above 25 °C per the power derating curve in the datasheet.
Is the BAS70W-7 suitable for automotive applications?
The standard BAS70W-7 is not AEC-Q200 qualified. However, Diodes offers the automotive-grade variant BAS70WQ-7-F, which meets AEC-Q200 requirements and operates over –40 °C to +125 °C with enhanced process controls and traceability.
Does the BAS70W-7 have a functional third pin?
No. Pin 3 in the SOT323 package is an internal die attach pad with no electrical connection. It serves only mechanical and thermal functions and must remain unconnected in circuit layout to avoid unintended shorts or parasitic coupling.
How does the guard ring improve reliability in the BAS70W-7?
The PN junction guard ring reduces electric field crowding at the silicon edge, suppressing premature avalanche and improving ESD tolerance (HBM >8 kV typical). It also enhances long-term stability under repeated transient stress, particularly in USB and I/O interface protection applications.
BAS70W-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
- Operating Temperature - Junction:
- -55°C ~ 125°C
BAS70W-7 FAQ
1.How can I place an order for BAS70W-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BAS70W-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 BAS70W-7 reliable?
The price and inventory of BAS70W-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAS70W-7 is usually 5 days.
3.What payment methods are accepted for BAS70W-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAS70W-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAS70W-7?
BAS70W-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAS70W-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 BAS70W-7?
For technical support, including BAS70W-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAS70W-7 requirements.
6.How does Aetrix verify that BAS70W-7 is sourced from the original manufacturer or authorized distributors?
All BAS70W-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 BAS70W-7 meets industry standards.
7.What is the process for return or replacement of BAS70W-7?
All BAS70W-7 units undergo pre-shipment inspection (PSI). If there is an issue with BAS70W-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 BAS70W-7 part is unused and in its original packaging.
Return procedure for BAS70W-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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