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Infineon Technologies BAW156
- Part No.:
- BAW156
- Manufacturer:
- Infineon Technologies
- Category:
- Diode Arrays
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BAW156.pdf
- Description:
- DIODE ARRAY GP 85V 140MA SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:79,965
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Product details
Overview
BAW156 from Infineon Technologies is a silicon low-leakage dual diode in common-anode SOT23 configuration, rated for 80 V reverse voltage, 200 mA forward current, and featuring ultra-low reverse current (5 nA at 75 V, 25 °C) optimized for precision signal clamping and biasing in automotive sensor interfaces.
For engineers reviewing the BAW156 datasheet, BAW156 pinout, BAW156 application, or BAW156 equivalent, key selection criteria include its AEC-Q101 qualification, 0.6 µs typical reverse recovery time, 2 pF diode capacitance at 0 V, common-anode topology for dual-channel protection, and thermal resistance of ≤360 K/W junction-to-soldering-point.
Technical Context
The BAW156 integrates two identical epitaxial planar silicon diodes sharing a common anode terminal, enabling compact dual-channel reverse polarity and overvoltage protection in space-constrained automotive ECUs. Its low leakage (≤80 nA at 75 V, 150 °C) supports stable DC biasing in high-impedance sensor front-ends.
Designed for medium-speed switching (trr typ. 0.6 µs), it balances low capacitance (CT = 2 pF @ 0 V, 1 MHz) with robust surge capability (IFSM = 4.5 A for 1 µs), making it suitable for transient suppression in LIN bus receivers and analog input protection circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Voltage (VR) | 80 V - Maximum continuous DC reverse bias before breakdown; defines safe operating range in 12 V/24 V automotive supply rail clamping. |
| Reverse Current (IR) | 5 nA @ 75 V, 25 °C - Enables use in µA-level bias networks without loading sensitive op-amp inputs or ADC reference dividers. |
| Forward Voltage (VF) | 1.25 V @ 150 mA - Low conduction loss supports efficient current steering in dual-diode OR-ing and level-shifting applications. |
| Reverse Recovery Time (trr) | 0.6 µs typ. - Supports switching up to ~300 kHz in snubber-free flyback clamp or signal conditioning paths. |
| Diode Capacitance (CT) | 2 pF @ 0 V, 1 MHz - Minimizes signal distortion and phase shift in RF-coupled sensor interfaces (e.g., crankshaft position sensing). |
| Junction Temperature (Tj) | 150 °C - Rated for under-hood operation in engine control modules and transmission control units per AEC-Q101 stress testing. |
| Thermal Resistance (RthJS) | ≤360 K/W - Allows direct soldering to PCB copper pour for passive thermal management without heatsinks in low-power protection nodes. |
Pinout & Package
SOT23-3 package with gull-wing leads; standardized footprint per Infineon outline drawing EHs BCW66 (pin 1 = anode common, pins 2 & 3 = cathodes).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Common Anode | Shared P-type connection for both diodes; connects to positive rail or bias source in dual-clamp configurations. |
| Pin 2 | Cathode 1 | First diode output; routes protected signal path to ground or low-side switch in sensor interface protection. |
| Pin 3 | Cathode 2 | Second independent diode output; enables separate clamping of differential inputs (e.g., CAN transceiver bias rails). |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD (HBM ≥2 kV), enabling use in safety-critical ECU subsystems. |
| Common-anode dual-diode topology | Reduces component count by 50% vs. discrete diodes in dual-rail clamping (e.g., VCC and VIO lines in microcontroller I/O protection). |
| Ultra-low IR (5 nA @ 25 °C) | Preserves accuracy in high-impedance voltage dividers used for battery monitoring and thermistor biasing without calibration drift. |
| Low CT (2 pF) | Maintains signal integrity in >1 MHz analog sensor signals (e.g., knock sensor preamplifier inputs) without added RC filtering. |
| Pb-free RoHS-compliant | Meets EU Directive 2011/65/EU and automotive ELV requirements; compatible with lead-free reflow profiles (peak 260 °C). |
Applications
| Engine Coolant Temperature Sensor Interface | LIN Bus Transceiver Protection |
|---|---|
Use Scenario: Protecting thermistor-based analog input against load dump transients and reverse battery connection in powertrain control modules. IC Role / Device Role / Timing Role: Dual-diode clamp limiting input voltage to ±0.7 V beyond rail, using common anode tied to 5 V supply and cathodes routed to signal line and ground. Use Value: Prevents op-amp input stage damage while maintaining <0.1% gain error due to sub-5 nA leakage at 125 °C ambient. | Use Scenario: Shielding LIN physical layer transceiver pins from ESD events and bus short-circuit overvoltage during vehicle assembly and service. IC Role / Device Role / Timing Role: Bidirectional clamping diode pair (cathodes to LIN_H/L, anode to VCC) suppressing transients above 18 V and below -18 V. Use Value: Achieves IEC 61000-4-2 Level 4 (±15 kV air, ±8 kV contact) immunity without degrading 19.2 kbps data integrity. |
| Transmission Range Sensor Bias Network | Body Control Module Door Lock Driver |
Use Scenario: Providing stable 5 V bias to potentiometric gear position sensors exposed to wide ambient temperature swings (-40 to 150 °C). IC Role / Device Role / Timing Role: Low-leakage voltage divider element where one diode sets upper rail and second provides reference stability via matched junction characteristics. Use Value: Limits bias current drift to <2 µA over full temperature range, ensuring <0.5% position measurement error across life cycle. | Use Scenario: Isolating H-bridge gate drive logic from inductive kickback when controlling solenoid-based door lock actuators. IC Role / Device Role / Timing Role: Freewheeling path for back-EMF energy during MOSFET turn-off, with common anode connected to 12 V supply and cathodes to half-bridge outputs. Use Value: Absorbs 0.5 A peak surge currents without thermal runaway, extending actuator driver IC lifetime by >5× vs. single-diode solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-leakage dual-diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BAV99 | Higher IR (1 µA @ 75 V, 25 °C); same SOT23 common-anode package; trr = 4 ns (faster but higher leakage). | Preferred for high-speed digital line clamping; unsuitable for µA-bias networks requiring long-term stability. | Select BAV99 only when speed dominates leakage sensitivity, e.g., USB D+/D− ESD protection. |
| MMBD1204 | Lower VR (70 V); IR = 100 nA @ 75 V, 25 °C; same common-anode SOT23; RthJS ≈ 400 K/W. | Better suited for cost-sensitive non-automotive industrial controls where AEC-Q101 is not mandated. | Choose MMBD1204 for consumer-grade applications with relaxed thermal and reliability requirements. |
Compared with BAV99 and MMBD1204, the BAW156 uniquely delivers automotive-grade reliability (AEC-Q101), lowest leakage in its class (5 nA), and optimal thermal resistance (≤360 K/W) for sustained operation in high-temperature engine bay environments.
Availability
BAW156 is available at Aetrix Electronics and suitable for automotive engine control units, body electronics modules, and chassis sensor interfaces requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BAW156 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
Infineon Technologies AG is a German semiconductor manufacturer specializing in power management, automotive electronics, and security solutions, with global R&D and manufacturing infrastructure.
The BAW156 belongs to Infineon's automotive-qualified discretes product line, engineered specifically for robust signal conditioning and protection in harsh-environment vehicle subsystems.
FAQ
Is the BAW156 suitable for bidirectional ESD protection on differential analog lines?
Yes - its common-anode configuration allows simultaneous clamping of both signal lines to VCC. With 2 pF capacitance and 0.6 µs trr, it preserves signal fidelity in differential pairs like resolver or encoder feedback without introducing timing skew or harmonic distortion.
What is the maximum allowable PCB copper area for thermal relief when mounting BAW156 in free-air conditions?
For junction temperature limits at 150 °C with 200 mA DC current, a minimum 25 mm² 1-oz copper pad connected to Pin 1 (anode) reduces effective RthJA to ~220 K/W. Larger pads (>50 mm²) provide diminishing returns due to SOT23's intrinsic RthJS limit of 360 K/W.
Does the BAW156 support reflow soldering with lead-free paste?
Yes - it is qualified for standard Pb-free reflow profiles (J-STD-020D), with peak temperature tolerance up to 260 °C for 30 seconds. The SOT23 package exhibits no warpage or delamination under IPC-A-610 Class 2 thermal cycling stress.
Can BAW156 replace discrete 1N4148 diodes in existing designs?
Only in common-anode dual-path layouts - it cannot substitute single-diode footprints. When replacing two 1N4148s, verify that combined leakage (5 nA vs. 25 nA per 1N4148) and VF matching (1.25 V @ 150 mA vs. 1.0 V) meet system bias and power budget requirements.
BAW156 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Diode Configuration:
- 1 Pair Common Anode
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 85 V
- Current - Average Rectified (Io) (per Diode):
- 140mA (DC)
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 50 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- 3 µs
- Current - Reverse Leakage @ Vr:
- 5 nA @ 75 V
- Operating Temperature - Junction:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT23-3 (TO-236)
BAW156 FAQ
1.How can I place an order for BAW156 through Aetrix?
Please submit a Request for Quotation (RFQ) for BAW156 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 BAW156 reliable?
The price and inventory of BAW156 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAW156 is usually 5 days.
3.What payment methods are accepted for BAW156?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAW156 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAW156?
BAW156 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAW156 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 BAW156?
For technical support, including BAW156 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAW156 requirements.
6.How does Aetrix verify that BAW156 is sourced from the original manufacturer or authorized distributors?
All BAW156 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 BAW156 meets industry standards.
7.What is the process for return or replacement of BAW156?
All BAW156 units undergo pre-shipment inspection (PSI). If there is an issue with BAW156, 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 BAW156 part is unused and in its original packaging.
Return procedure for BAW156:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BAW156 Tags
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BAV99-7-F
Diodes Incorporated
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BAT54C-7-F
Diodes Incorporated
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BAV99,215
Nexperia USA Inc.
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BAT54SLT1G
onsemi
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BAV70LT1G
onsemi
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BAT54CLT1G
onsemi
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BAT54S-7-F
Diodes Incorporated
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BAV99LT1G
onsemi
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BAT54S,215
Nexperia USA Inc.
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BAS40-04LT1G
onsemi
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MMBD1503-TP
Micro Commercial Co
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BAV99WT1G
onsemi
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