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Nexperia USA Inc. BAS70,235
- Part No.:
- BAS70,235
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BAS70,235.pdf
- Description:
- DIODE SCHOTTKY 70V 70MA TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,090
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Product details
Overview
BAS70,235 from Nexperia is a general-purpose Schottky diode in SOT23 package, designed for ultra-high-speed switching and voltage clamping. It delivers 70 mA forward current, 410 mV forward voltage at 1 mA, 70 V reverse voltage rating, and 2 pF capacitance at 0 V, operating across −65 °C to 150 °C ambient range.
For engineers reviewing the BAS70,235 datasheet, BAS70,235 pinout, BAS70,235 application, or BAS70,235 equivalent, key selection criteria include low forward voltage for efficiency-critical signal paths, low capacitance for RF and high-frequency timing circuits, and robust 70 V reverse breakdown in clamp protection designs.
Technical Context
The BAS70,235 implements a planar Schottky barrier structure optimized for fast recovery (sub-nanosecond) and minimal stored charge. Its anode–cathode configuration with internal terminal 2 unconnected enables compact layout in space-constrained SMD applications.
Thermal resistance from junction to ambient is 500 K/W on standard FR4 PCB, supporting continuous operation up to 150 °C junction temperature. Reverse leakage remains below 100 nA at 50 V and 25 °C, rising to 10 µA at rated 70 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Forward Voltage | 410 mV at 1 mA pulsed - enables low-loss biasing in precision analog front-ends |
| Reverse Voltage | 70 V - supports clamp protection in 48 V industrial bus interfaces |
| Forward Current | 70 mA continuous - sufficient for logic-level signal routing and level-shifting |
| Diode Capacitance | 2 pF at 0 V, 1 MHz - minimizes signal distortion in >100 MHz RF detector paths |
| Reverse Leakage | 100 nA at 50 V, 25 °C - ensures stable DC bias in high-impedance sensor conditioning |
| Junction Temp Limit | 150 °C - allows operation in sealed enclosures without active cooling |
Pinout & Package
Package: SOT23 (TO-236AB), 3-terminal surface-mount plastic package, 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward current entry point; connects to higher-potential node in clamp or rectifier path |
| 2 | Not Connected (n.c.) | No internal bond; must remain floating-no PCB trace or solder mask required |
| 3 | Cathode (K) | Forward current exit; ties to reference or ground in clamping configurations |
Key Features
| Feature | Design Value |
|---|---|
| High switching speed | Sub-nanosecond reverse recovery time enables use in >500 MHz pulse shaping |
| Low leakage current | 100 nA max at 50 V ensures minimal error current in high-gain op-amp feedback networks |
| Low capacitance | 2 pF typical allows integration into 2.4 GHz ISM-band antenna switch matching networks |
| High breakdown voltage | 70 V rating supports direct placement across 48 V PoE lines without external Zener stacking |
Applications
| Logic-Level Signal Clamping | RF Detector Input Protection |
|---|---|
Use Scenario: Protecting CMOS input pins from ESD transients and overvoltage during hot-plug events in USB-C and PCIe interface cards. IC Role / Device Role / Timing Role: Fast-turn-on Schottky clamp limiting input swing to <0.45 V above rail or <0.45 V below ground. Use Value: Prevents gate oxide damage while adding <1.5 pF parasitic capacitance to signal path. | Use Scenario: Front-end protection of 2.4 GHz Wi-Fi receiver LNA inputs against antenna coupling surges. IC Role / Device Role / Timing Role: Low-capacitance shunt clamp absorbing RF energy before it reaches sensitive GaAs FET gates. Use Value: Maintains noise figure integrity with only 2 pF loading and no DC bias current draw. |
| DC-DC Converter Feedback Snubbing | Industrial Sensor Biasing |
Use Scenario: Damping high-frequency ringing on optocoupler feedback traces in isolated 24 V/48 V flyback converters. IC Role / Device Role / Timing Role: High-speed snubber diode placed across feedback resistor to suppress MHz-range oscillations. Use Value: Reduces output voltage ripple by 40% without affecting regulation loop stability. | Use Scenario: Providing stable reverse-biased bias for photodiode arrays in factory-floor optical encoders. IC Role / Device Role / Timing Role: Low-leakage blocking diode isolating bias rail from noisy digital supply domains. Use Value: Limits dark-current error to <100 nA across −40 °C to +85 °C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MBR0520L,215 | Lower VF (320 mV @ 1 mA), higher IF (500 mA), same SOT23 package | Better suited for power rail OR-ing; less optimal for low-current signal clamping due to higher leakage (2 µA @ 20 V) | Select when forward conduction loss dominates design; avoid where sub-µA leakage is critical |
| 1N5711TR | Higher VR (100 V), larger DO-35 package, VF = 490 mV @ 1 mA | Requires through-hole layout; better for high-voltage transient suppression in AC line sensing | Choose for legacy through-hole boards or >70 V clamping needs; not drop-in SMT replacement |
Compared with MBR0520L,215 and 1N5711TR, the BAS70,235 uniquely balances ultra-low capacitance (2 pF), moderate 70 V rating, and nanoscale switching for signal-path protection-making it optimal for high-frequency, low-current analog and digital interface clamping where layout density and RF integrity are prioritized.
Availability
BAS70,235 is available at Aetrix Electronics and suitable for industrial sensor interfaces, USB-C port protection, and RF front-end biasing requiring stable component supply and consistent SOT23 footprint compatibility.
Supply support for BAS70,235 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
Nexperia is a global semiconductor expert focused on high-volume, high-reliability discrete and logic devices, headquartered in Nijmegen, Netherlands, with manufacturing in Asia and Europe.
The BAS70 series belongs to Nexperia's general-purpose Schottky diode product line, engineered for cost-sensitive, high-speed signal integrity applications in consumer, industrial, and communications equipment.
FAQ
Is BAS70,235 automotive qualified?
No. The BAS70,235 is explicitly marked as non-automotive qualified per Nexperia's revision history. It lacks AEC-Q101 qualification and is not tested to automotive temperature or reliability standards. For automotive applications, Nexperia offers the BAS70-07W-Q variant with full AEC-Q101 certification and extended qualification testing.
What is the thermal resistance of BAS70,235 on a standard PCB?
The junction-to-ambient thermal resistance (Rth(j-a)) is 500 K/W when mounted on a single-sided FR4 PCB with standard SOT23 footprint and tin-plated copper. This value assumes free-air convection and no thermal vias or copper pour-adding 2 oz copper and two thermal vias reduces Rth(j-a) to approximately 220 K/W.
Can terminal 2 be used as a heatsink pad?
No. Terminal 2 is internally not connected (n.c.) and has no electrical or thermal connection to the die. It must remain electrically floating and provides no thermal benefit. Using it as a thermal pad violates the device's mechanical and thermal specifications and may cause solder joint reliability issues during reflow.
How does BAS70,235 perform at elevated temperatures?
At 125 °C ambient, forward voltage drops to ~370 mV at 1 mA, while reverse leakage increases to ~1.2 µA at 50 V. Junction temperature must stay ≤150 °C; with 70 mA forward current and 500 K/W thermal resistance, self-heating limits usable ambient to ~115 °C under worst-case conduction.
BAS70,235 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- 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):
- -
- Current - Reverse Leakage @ Vr:
- 10 µA @ 70 V
- Capacitance @ Vr, F:
- 2pF @ 0V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
- Operating Temperature - Junction:
- 150°C (Max)
BAS70,235 FAQ
1.How can I place an order for BAS70,235 through Aetrix?
Please submit a Request for Quotation (RFQ) for BAS70,235 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 BAS70,235 reliable?
The price and inventory of BAS70,235 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAS70,235 is usually 5 days.
3.What payment methods are accepted for BAS70,235?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAS70,235 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAS70,235?
BAS70,235 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAS70,235 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 BAS70,235?
For technical support, including BAS70,235 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAS70,235 requirements.
6.How does Aetrix verify that BAS70,235 is sourced from the original manufacturer or authorized distributors?
All BAS70,235 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 BAS70,235 meets industry standards.
7.What is the process for return or replacement of BAS70,235?
All BAS70,235 units undergo pre-shipment inspection (PSI). If there is an issue with BAS70,235, 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 BAS70,235 part is unused and in its original packaging.
Return procedure for BAS70,235:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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