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Nexperia USA Inc. BAS70,215
- Part No.:
- BAS70,215
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BAS70,215.pdf
- Description:
- DIODE SCHOTTKY 70V 70MA TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:67,400
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Product details
Overview
BAS70 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 junction capacitance at 1 MHz - enabling low-loss signal routing in compact DC-DC and interface protection circuits.
For engineers reviewing the BAS70 datasheet, BAS70 pinout, BAS70 application, or BAS70 equivalent, key selection criteria include its low VF at low IF, sub-100 nA IR at 50 V, 100 mA non-repetitive surge capability, and verified SOT23 thermal resistance of 500 K/W on FR4 PCBs.
Technical Context
The BAS70 operates as a unidirectional, low-barrier Schottky rectifier with no internal series resistance or integrated protection circuitry. Its anode–cathode structure supports pulsed forward conduction up to 70 mA (repetitive) and 100 mA (non-repetitive), while maintaining reverse leakage below 10 µA at rated 70 V VR.
Thermal performance is defined by junction-to-ambient resistance of 500 K/W under standard FR4 mounting, and operation is specified across −65 °C to +150 °C ambient and storage ranges. No biasing network or external compensation is required - it functions as a two-terminal passive switching element.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Forward Voltage (VF) | 410 mV at 1 mA pulsed - enables low-loss biasing in signal-level clamp networks |
| Reverse Voltage (VR) | 70 V - supports rail-to-rail clamping in 5 V–48 V industrial logic and sensor interfaces |
| Forward Current (IF) | 70 mA continuous - sufficient for ESD transient steering and low-power level-shifting paths |
| Junction Capacitance (Cd) | 2 pF at 0 V, 1 MHz - preserves signal integrity in >100 MHz digital and RF detector applications |
| Reverse Leakage (IR) | 100 nA at 50 V, 25 °C - ensures minimal standby power loss in battery-backed circuits |
| Thermal Resistance (Rth(j-a)) | 500 K/W on single-sided FR4 - defines derating curve for sustained 70 mA operation at Tamb ≤ 85 °C |
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 clamping or rectification path |
| 2 | Not Connected (n.c.) | Electrically isolated terminal; no internal bond wire or die connection - must remain floating |
| 3 | Cathode (K) | Forward current exit point; ties to reference or lower-potential node; primary return path for clamped transients |
Key Features
| Feature | Design Value |
|---|---|
| High switching speed | Sub-nanosecond recovery time enabled by low junction capacitance (2 pF) and Schottky barrier physics |
| Low leakage current | 100 nA at 50 V reverse bias ensures <1 µW standby dissipation in always-on monitoring circuits |
| High breakdown voltage | 70 V VR rating allows direct use in 48 V telecom and industrial bus protection without series stacking |
| Low forward voltage | 410 mV VF at 1 mA reduces voltage drop in precision analog clamp and reference bias networks |
Applications
| USB 2.0 Data Line Protection | Low-Voltage Logic Level Shifting |
|---|---|
Use Scenario: Clamping ESD transients on D+ and D− lines before USB PHY input. IC Role / Device Role / Timing Role: Passive bidirectional voltage clamp using dual-BAS70 configuration (anode-to-line, cathode-to-VBUS). Use Value: 2 pF capacitance avoids signal edge degradation at 480 Mbps; 410 mV VF ensures clamping threshold stays below 3.3 V logic high. |
Use Scenario: Translating 1.8 V I²C signals to 3.3 V microcontroller inputs. IC Role / Device Role / Timing Role: Unidirectional level shifter via anode-to-low-voltage-bus, cathode-to-high-voltage-bus topology. Use Value: Low VF minimizes offset error; 70 mA IF rating supports multi-drop bus drive strength without saturation. |
| RF Detector Bias Network | DC-DC Converter Output Snubber |
Use Scenario: Providing temperature-stable bias to GaAs FET detector diodes in 2.4 GHz ISM band receivers. IC Role / Device Role / Timing Role: Low-capacitance DC bias feed with minimal RF loading on detector anode node. Use Value: 2 pF Cd prevents detuning of matching networks; 100 nA IR avoids detector bias drift over temperature. |
Use Scenario: Suppressing ringing on synchronous buck converter output during light-load discontinuous conduction mode. IC Role / Device Role / Timing Role: Fast-recovery snubber diode placed across low-side MOSFET source–drain. Use Value: 70 V VR withstands peak inductive kick; sub-ns switching prevents energy recirculation into gate driver. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor NSR0230HT1G | Lower VF (270 mV @ 1 mA), same SOT23-3, but 30 V VR rating | Limited to ≤3.3 V systems; unsuitable for 48 V clamping or industrial bus protection | Select when lowest forward drop is critical and reverse voltage ≤30 V |
| Vishay SD103A-T | Higher VF (550 mV @ 10 mA), DO-35 axial package, 40 V VR | Through-hole mounting only; larger footprint and higher parasitic inductance limit >10 MHz use | Choose for legacy through-hole designs where SMT rework is prohibited |
Compared with NSR0230HT1G and SD103A-T, the BAS70 uniquely balances 70 V VR, 2 pF capacitance, and SOT23 compatibility - making it optimal for space-constrained, mixed-voltage industrial interfaces requiring both robustness and speed.
Availability
BAS70 is available at Aetrix Electronics and suitable for USB data line protection, low-voltage logic level shifting, RF detector bias networks, and DC-DC converter snubbing requiring stable component supply and consistent SOT23 form factor.
Supply support for BAS70 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.
The BAS70 belongs to Nexperia's general-purpose Schottky diode product line, engineered for cost-sensitive, high-speed signal integrity applications in industrial, computing, and consumer electronics - not automotive-qualified.
FAQ
Is BAS70 suitable for automotive applications?
No. The BAS70 is explicitly marked as non-automotive qualified in its revision history and legal disclaimers. It lacks AEC-Q101 qualification, automotive-grade process controls, and extended temperature validation beyond −65 °C to +150 °C. For automotive use, Nexperia offers the BAS70-Q series variants with full qualification documentation.
What does the 'n.c.' pin mean on BAS70?
Pin 2 is Not Connected - it has no internal bond wire or die connection. It must remain electrically floating in PCB layout and schematic; tying it to ground, VCC, or any signal violates the device's thermal and electrical specifications and may cause unpredictable leakage or thermal runaway.
Can BAS70 replace BAT54 in existing designs?
Only with verification. While both are SOT23 Schottky diodes, BAS70 has 70 V VR versus BAT54's 30 V, but higher VF (410 mV vs. ~320 mV at 1 mA). In 3.3 V systems, this may raise clamping thresholds; in 48 V systems, BAS70 provides necessary voltage margin. Layout and thermal validation are required before substitution.
How does BAS70 perform at elevated temperatures?
At 125 °C ambient, forward voltage drops to ~360 mV (per Fig. 1), while reverse leakage rises to ~1 µA at 50 V (per Fig. 2). Junction temperature must stay ≤150 °C - with Rth(j-a) = 500 K/W, continuous 70 mA operation requires Tamb ≤ 85 °C unless board-level heatsinking is added.
BAS70,215 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)
BAS70,215 FAQ
1.How can I place an order for BAS70,215 through Aetrix?
Please submit a Request for Quotation (RFQ) for BAS70,215 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 BAS70,215 reliable?
The price and inventory of BAS70,215 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAS70,215 is usually 5 days.
3.What payment methods are accepted for BAS70,215?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAS70,215 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAS70,215?
BAS70,215 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAS70,215 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 BAS70,215?
For technical support, including BAS70,215 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAS70,215 requirements.
6.How does Aetrix verify that BAS70,215 is sourced from the original manufacturer or authorized distributors?
All BAS70,215 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 BAS70,215 meets industry standards.
7.What is the process for return or replacement of BAS70,215?
All BAS70,215 units undergo pre-shipment inspection (PSI). If there is an issue with BAS70,215, 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 BAS70,215 part is unused and in its original packaging.
Return procedure for BAS70,215:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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