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Nexperia USA Inc. BAS70-04W-QF
- Part No.:
- BAS70-04W-QF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Diode Arrays
- Package:
- SC-70, SOT-323
- Datasheet:
-
BAS70-04W-QF.pdf
- Description:
- DIODE ARR SCHOTT 70V 70MA SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:9,971
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Product details
Overview
BAS70-04W-Q from Nexperia is a general-purpose dual Schottky diode in SOT323 (SC-70) package, configured as two independent diodes sharing a common cathode/anode terminal (pin 3 = K1/A2). It delivers 70 V reverse voltage rating, 70 mA forward current, 410 mV forward voltage at 1 mA, 2 pF capacitance at 0 V, and AEC-Q101 qualification for automotive signal clamping and ultra-high-speed switching.
For engineers reviewing the BAS70-04W-Q datasheet, BAS70-04W-Q pinout, BAS70-04W-Q application, or BAS70-04W-Q equivalent, key selection criteria include dual-diode topology, low VF/low Cd trade-off, thermal resistance (500 K/W), AEC-Q101 compliance, and SC-70 footprint compatibility with high-density PCB layouts.
Technical Context
This dual Schottky diode integrates two independent junctions in a single SC-70 package with shared terminal (pin 3 functions as cathode for D1 and anode for D2), enabling compact voltage clamping and polarity-selective rectification. Its 2 pF capacitance at 1 MHz and sub-1 µs recovery time support >100 MHz signal integrity in ESD protection paths.
Thermal performance is defined by Rth(j-a) = 500 K/W on FR4 with single-sided copper, limiting continuous power dissipation to ~125 mW at Tamb = 25 °C. The 150 °C max junction temperature and −65 °C to +150 °C operating range support under-hood automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Voltage (VR) | 70 V - Supports clamping of transients up to ISO 7637-2 Pulse 1/2a in 12 V automotive systems. |
| Forward Voltage (VF) | 410 mV @ 1 mA - Minimizes conduction loss in low-current bias and sensing paths. |
| Diode Capacitance (Cd) | 2 pF @ 0 V, 1 MHz - Enables use in RF coupling and high-speed digital I/O protection without signal distortion. |
| Reverse Current (IR) | 100 nA @ 50 V - Ensures low leakage in battery-backed circuits and precision reference paths. |
| Thermal Resistance (Rth j-a) | 500 K/W - Requires derating above 25 °C ambient; limits usable DC power to ≤125 mW on standard FR4. |
| Junction Temperature (Tj) | 150 °C - Allows operation in engine control units and ADAS modules with localized heating. |
Pinout & Package
Package: SOT323 (SC-70), 3-lead surface-mount plastic package, 2.0 mm × 1.25 mm × 0.95 mm body, 1.3 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode of Diode 1 (A1) | Input node for first Schottky path; connects to protected signal line or supply rail. |
| 2 | Cathode of Diode 2 (K2) | Return node for second diode; used for bidirectional clamping or dual-rail protection. |
| 3 | Cathode of Diode 1 / Anode of Diode 2 (K1; A2) | Shared terminal enabling cross-connected dual-diode configuration (e.g., series-aided or common-cathode layout). |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including powertrain and body electronics per stress test requirements. |
| Low forward voltage | 410 mV @ 1 mA enables efficient clamping with minimal voltage offset in precision analog interfaces. |
| Ultra-low capacitance | 2 pF allows integration into USB 2.0, CAN FD, and LVDS signal lines without bandwidth degradation. |
| High-speed switching | Sub-1 µs recovery supports >100 MHz transient suppression in ESD and surge protection circuits. |
| Small-footprint packaging | SOT323 footprint saves >60% board area vs. SOIC-8 dual diodes, critical for space-constrained ECUs. |
Applications
| Automotive ESD Protection | USB 2.0 Data Line Clamping |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver I/O pins from ISO 10605 ESD events in door modules. IC Role / Device Role / Timing Role: Dual-diode clamp between data line and VCC/GND rails, leveraging pin 3 as common node for bidirectional shunting. Use Value: 70 V VR withstands load-dump surges; 2 pF Cd preserves signal rise/fall times <1 ns. |
Use Scenario: Preventing electrostatic discharge damage on D+ and D− lines of embedded USB host controllers. IC Role / Device Role / Timing Role: Low-capacitance Schottky pair providing ±15 kV air-gap ESD immunity per IEC 61000-4-2 Level 4. Use Value: 410 mV VF ensures clamping threshold stays below USB 2.0 eye diagram margin; SOT323 fits tight trace routing. |
| Low-Power Sensor Biasing | High-Frequency Signal Rectification |
Use Scenario: Providing stable bias current to MEMS pressure sensor bridges in tire pressure monitoring systems (TPMS). IC Role / Device Role / Timing Role: Dual diode used in precision current mirror configuration with shared terminal (pin 3) enabling matched thermal tracking. Use Value: 100 nA IR at 50 V prevents drift in µA-level bias networks; AEC-Q101 ensures reliability over 15-year service life. |
Use Scenario: Peak detection in 50 MHz RF envelope detectors for wireless receiver front-ends. IC Role / Device Role / Timing Role: Fast-switching Schottky pair rectifying AC-coupled RF signals with minimal phase distortion. Use Value: Sub-1 µs recovery time maintains detector linearity; 2 pF Cd avoids resonance with 50 Ω source impedance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor NSR20F70HT1G | Higher VF (550 mV @ 1 mA), same 70 V VR, SOD-323 package (slightly larger than SOT323), 3 pF Cd. | Less suitable for ultra-low-offset analog clamping but offers higher surge current rating (IFSM = 200 mA). | Select when higher robustness against repetitive transients is prioritized over minimal VF. |
| Vishay SDUR7004 | Same SOT323 package, lower VR (40 V), VF = 380 mV @ 1 mA, Cd = 1.8 pF, not AEC-Q101 qualified. | Restricted to non-automotive 3.3 V/5 V logic protection; lacks automotive lifecycle assurance. | Select only for cost-sensitive consumer-grade designs where AEC-Q101 is not required. |
Compared with NSR20F70HT1G and SDUR7004, BAS70-04W-Q uniquely balances AEC-Q101 compliance, 70 V VR headroom, and 410 mV VF in the smallest SC-70 footprint-making it optimal for space-constrained automotive signal conditioning where both reliability and precision matter.
Availability
BAS70-04W-Q is available at Aetrix Electronics and suitable for automotive ECU design, USB interface protection, and MEMS sensor biasing requiring stable component supply across long production lifecycles.
Supply support for BAS70-04W-Q 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 essential efficiency-enhancing components, delivering high-performance diodes, MOSFETs, and logic ICs with emphasis on automotive and industrial reliability.
BAS70-04W-Q belongs to Nexperia's AEC-Q101-qualified Schottky diode portfolio, engineered specifically for high-speed signal integrity and robust transient suppression in automotive electronics.
FAQ
Is BAS70-04W-Q suitable for bidirectional TVS-like clamping?
No-it is a dual Schottky diode, not a TVS device. It provides unidirectional clamping per diode junction. For bidirectional protection, external circuitry (e.g., back-to-back configuration with resistors or complementary diodes) is required. Its 70 V VR and low Cd make it appropriate for low-energy ESD clamping, not high-power surge suppression.
What is the maximum continuous forward current for each diode?
The absolute maximum forward current (IF) is 70 mA per diode, as specified in the limiting values table. Derating is required above 25 °C ambient due to Rth(j-a) = 500 K/W; at 85 °C ambient, maximum usable IF drops to approximately 45 mA to maintain Tj ≤ 150 °C.
Can BAS70-04W-Q replace BAS70-04 in existing designs?
Yes-BAS70-04W-Q is the automotive-qualified (AEC-Q101) version of BAS70-04, sharing identical electrical specs, pinout, and SOT323 package. The "-Q" suffix denotes qualification; no layout or schematic changes are needed for drop-in replacement in automotive applications.
How does the shared pin (pin 3) affect PCB layout?
Pin 3 serves as cathode for D1 and anode for D2, enabling compact dual-diode configurations like common-cathode or series-aided topologies. Layout must avoid routing conflicting nets to this pin; thermal relief and solder mask clearance must follow Nexperia's SOT323 reflow footprint (2.65 mm × 2.35 mm pad array) to ensure manufacturability.
BAS70-04W-QF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Diode Configuration:
- 1 Pair Series Connection
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 70 V
- Current - Average Rectified (Io) (per Diode):
- 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
- Operating Temperature - Junction:
- 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
BAS70-04W-QF FAQ
1.How can I place an order for BAS70-04W-QF through Aetrix?
Please submit a Request for Quotation (RFQ) for BAS70-04W-QF 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 BAS70-04W-QF reliable?
The price and inventory of BAS70-04W-QF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAS70-04W-QF is usually 5 days.
3.What payment methods are accepted for BAS70-04W-QF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAS70-04W-QF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAS70-04W-QF?
BAS70-04W-QF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAS70-04W-QF 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 BAS70-04W-QF?
For technical support, including BAS70-04W-QF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAS70-04W-QF requirements.
6.How does Aetrix verify that BAS70-04W-QF is sourced from the original manufacturer or authorized distributors?
All BAS70-04W-QF 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 BAS70-04W-QF meets industry standards.
7.What is the process for return or replacement of BAS70-04W-QF?
All BAS70-04W-QF units undergo pre-shipment inspection (PSI). If there is an issue with BAS70-04W-QF, 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 BAS70-04W-QF part is unused and in its original packaging.
Return procedure for BAS70-04W-QF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BAS70-04W-QF Tags
-
BAV99-7-F
Diodes Incorporated
-
BAT54C-7-F
Diodes Incorporated
-
BAV99,215
Nexperia USA Inc.
-
BAT54SLT1G
onsemi
-
BAV70LT1G
onsemi
-
BAT54CLT1G
onsemi
-
BAT54S-7-F
Diodes Incorporated
-
BAV99LT1G
onsemi
-
BAT54S,215
Nexperia USA Inc.
-
BAS40-04LT1G
onsemi
-
MMBD1503-TP
Micro Commercial Co
-
BAV99WT1G
onsemi
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