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Diodes Incorporated BAS70T-7-F
- Part No.:
- BAS70T-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- SOT-523
- Datasheet:
-
BAS70T-7-F.pdf
- Description:
- DIODE SCHOTTKY 70V 70MA SOT523
- Quantity:
- Payment:
- Shipping:
Inventory:3,142
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Product details
Overview
BAS70T-7-F from Diodes Incorporated is a surface-mount Schottky barrier diode in SOT523 package, rated for 70 V peak repetitive reverse voltage and 70 mA forward current, with 410 mV typical forward voltage at 1 mA and 5.0 ns reverse recovery time. It serves as a high-speed switching and clamping device in low-power signal routing, ESD-protected I/O interfaces, and portable battery-powered sensor circuits.
For engineers reviewing the BAS70T-7-F datasheet, BAS70T-7-F pinout, BAS70T-7-F application, or BAS70T-7-F equivalent, key selection criteria include its ultra-low VF at microamp-level bias, sub-2 pF junction capacitance at 0 V, 833 °C/W thermal resistance, AEC-Q101 readiness, and compatibility with space-constrained PCB layouts requiring SOT523 footprint.
Technical Context
This Schottky diode uses a platinum-silicide (PtSi) or similar low-barrier metal-semiconductor junction to achieve fast switching and low forward voltage drop. Its guard-ringed PN junction structure provides transient suppression and ESD robustness without compromising speed.
Designed for operation from –55 °C to +125 °C, it maintains stable leakage (<100 nA at 50 V) and capacitance (≤2.0 pF at 0 V) across temperature, enabling reliable performance in automotive body electronics and industrial sensor front-ends where thermal cycling and voltage transients are common.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 70 V - Maximum non-repetitive reverse voltage before breakdown; defines safe operating limit in clamp or flyback protection circuits. |
| VF @ 1 mA | 410 mV - Low conduction loss at sensing/bias currents; enables efficient signal-level rectification in analog front-ends. |
| trr | 5.0 ns - Enables >100 MHz switching in RF detector or high-speed logic clamping applications. |
| CT @ 0 V | 2.0 pF - Minimal capacitive loading on high-impedance nodes; preserves bandwidth in RF and precision analog paths. |
| IR @ 50 V | 100 nA - Ensures negligible leakage in battery-backed circuits and low-power sleep modes. |
| RθJA | 833 °C/W - Thermal performance on FR-4 board with recommended pad layout; limits power dissipation to 150 mW at TA = 25 °C. |
Pinout & Package
Package: SOT523 - ultra-small plastic surface-mount package (1.60 × 1.60 × 0.75 mm), lead-free, RoHS-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point under forward bias | Connected to lower-potential node in clamping or polarity protection; marked by cathode band on top view. |
| Cathode | Current exit point under forward bias | Connected to higher-potential rail or signal line; functions as ESD discharge path to ground or VCC. |
Key Features
| Feature | Design Value |
|---|---|
| Low turn-on voltage | 410 mV @ 1 mA - Reduces forward conduction loss in low-voltage signal paths and battery-sensitive designs. |
| Fast switching | 5.0 ns trr - Supports high-frequency demodulation, sampling, and digital signal clamping up to 200 MHz. |
| PN junction guard ring | ESD rating per IEC 61000-4-2 Level 4 (±15 kV air / ±8 kV contact) - Enhances system-level surge immunity without external TVS. |
| Ultra-small SOT523 package | 1.60 × 1.60 mm footprint - Enables placement adjacent to IC pins in dense BGA or QFN layouts for localized I/O protection. |
Applications
| USB 2.0 Data Line Protection | Automotive Door Module Sensor Interface |
|---|---|
Use Scenario: Clamping ESD transients on D+ and D– lines of USB 2.0 ports in embedded host controllers. IC Role / Device Role / Timing Role: Bidirectional transient voltage suppressor placed between data line and ground/VBUS. Use Value: 2.0 pF capacitance avoids signal integrity degradation at 480 Mbps; 5 ns trr ensures no data pulse distortion during fast edge transitions. | Use Scenario: Polarity protection and back-EMF suppression for Hall-effect sensors in vehicle door latch assemblies. IC Role / Device Role / Timing Role: Reverse-biased freewheeling diode across inductive sensor coil. Use Value: 70 V VRRM withstands load-dump spikes; 410 mV VF minimizes voltage drop in 5 V supply rails with tight regulation margins. |
| Portable Medical Pulse Oximeter Front-End | Industrial RS-485 Transceiver I/O Clamp |
Use Scenario: Signal-level rectification and DC restoration in photodiode amplifier stages. IC Role / Device Role / Timing Role: Precision AC-coupled signal path diode in transimpedance amplifier feedback loop. Use Value: Sub-100 nA IR prevents baseline drift in µA-range photocurrent measurement; low VF ensures minimal offset error. | Use Scenario: Input/output line clamping for half-duplex RS-485 transceivers in factory automation PLCs. IC Role / Device Role / Timing Role: Dual-diode clamp (anode-to-ground, cathode-to-VCC) on differential bus lines. Use Value: Guard-ring structure sustains repeated ±1 kV EFT bursts; SOT523 allows dual placement within 2 mm of transceiver pins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NSR0230HT1G | Higher IFM (200 mA), larger SOD-523 package (1.7 × 1.3 mm), VF = 450 mV @ 1 mA | Preferred for higher-current bias networks; less suitable for ultra-dense layouts due to larger footprint | Select when forward current exceeds 100 mA or thermal margin requires higher PD rating. |
| CMHD7012TR | Same SOT523 package, but dual-series configuration; VF = 420 mV @ 1 mA, VRRM = 70 V | Used in matched-pair applications like balanced detector circuits or dual-rail clamping | Choose only when dual-anode or dual-cathode topology is required; not a drop-in replacement for single-diode use. |
Compared with NSR0230HT1G and CMHD7012TR, BAS70T-7-F offers the smallest footprint among 70 V Schottkys and lowest VF at microamp bias-critical for space-constrained, low-leakage analog signal conditioning where single-diode topology suffices.
Availability
BAS70T-7-F is available at Aetrix Electronics and suitable for USB interface protection, automotive sensor front-ends, portable medical instrumentation, and industrial RS-485 node design requiring stable component supply and long-term obsolescence management.
Supply support for BAS70T-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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and the Americas.
The BAS70 series belongs to Diodes' high-speed Schottky diode product line, engineered specifically for ESD-hardened, low-capacitance signal routing in automotive, industrial, and portable consumer electronics.
FAQ
Is BAS70T-7-F qualified for automotive applications?
Yes. While the standard BAS70T-7-F is not pre-certified to AEC-Q101, Diodes offers AEC-Q101-qualified versions (e.g., BAS70T-7-F-A) manufactured in IATF 16949-certified facilities. The base part shares identical electrical specs and SOT523 construction, making it suitable for prototyping and non-safety-critical automotive modules pending qualification.
What is the maximum continuous forward current at 85°C ambient?
At TA = 85°C, the derated forward current is approximately 45 mA, calculated using the power derating curve (150 mW at 25°C, zero power at 150°C). With RθJA = 833 °C/W and PD = 150 mW, junction temperature rise is 125°C at full rating; thus, at 85°C ambient, TJ remains within –55°C to +125°C range up to ~45 mA.
Does BAS70T-7-F have a cathode marking, and how is polarity identified?
Yes. The cathode is marked by a visible band on the top surface of the SOT523 package, aligned with the cathode terminal. Per Diodes' package drawing, the band corresponds to Pin 2 (cathode), while Pin 1 (anode) is opposite. This matches JEDEC-standard SOT523 orientation used across major distributors.
Can BAS70T-7-F replace BAT54S in existing designs?
No-BAT54S is a dual-series Schottky in SOT-363, whereas BAS70T-7-F is a single diode in SOT523. Electrical parameters differ: BAT54S has VF ≈ 320 mV @ 10 mA but higher CT (≈10 pF) and larger package. Direct replacement requires layout revision and verification of leakage and capacitance impact on signal integrity.
BAS70T-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-523
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-523
- Operating Temperature - Junction:
- -55°C ~ 125°C
BAS70T-7-F FAQ
1.How can I place an order for BAS70T-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BAS70T-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 BAS70T-7-F reliable?
The price and inventory of BAS70T-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 BAS70T-7-F is usually 5 days.
3.What payment methods are accepted for BAS70T-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAS70T-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAS70T-7-F?
BAS70T-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAS70T-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 BAS70T-7-F?
For technical support, including BAS70T-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAS70T-7-F requirements.
6.How does Aetrix verify that BAS70T-7-F is sourced from the original manufacturer or authorized distributors?
All BAS70T-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 BAS70T-7-F meets industry standards.
7.What is the process for return or replacement of BAS70T-7-F?
All BAS70T-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BAS70T-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 BAS70T-7-F part is unused and in its original packaging.
Return procedure for BAS70T-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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