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Diodes Incorporated BAT46WQ-7-F
- Part No.:
- BAT46WQ-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- SOD-123
- Datasheet:
-
BAT46WQ-7-F.pdf
- Description:
- DIODE SCHOTTKY 100V 150MA SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:10,097
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Product details
Overview
BAT46WQ-7-F from Diodes Incorporated is a surface-mount Schottky barrier diode qualified to AEC-Q101 for automotive reliability, with 100 V peak reverse voltage, 150 mA forward current, and max 1.0 V forward voltage at 250 mA. It features guard ring construction for transient protection and is used in polarity protection and flyback recirculation circuits in engine control units and body electronics.
For engineers reviewing the BAT46WQ-7-F datasheet, BAT46WQ-7-F pinout, BAT46WQ-7-F application, or BAT46WQ-7-F equivalent, key selection criteria include its low VF at high IF, tight IR specification at elevated temperature, SOD123 package thermal performance, and AEC-Q101 qualification status for under-hood deployment.
Technical Context
This Schottky diode uses a planar silicon structure with guard ring edge termination to enhance surge robustness and reduce leakage drift over temperature. Its low forward voltage drop stems from optimized metal–semiconductor junction design, enabling efficient power path management in low-voltage DC systems.
It operates across –55°C to +125°C junction temperature, with thermal resistance of 370°C/W on polyimide board and 420°C/W on FR-4 - critical for sustained 150 mA conduction in thermally constrained automotive PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VR (V) | 100 V - supports 24 V automotive systems with ≥4× safety margin against load dump transients |
| IF (A) | 0.15 A continuous - suitable for signal-level and low-power biasing applications without heatsinking |
| VF Max (V) | 1.00 V @ 250 mA - enables minimal conduction loss in compact recirculation paths |
| IR Max (µA) | 2.0 µA @ 25°C, VR = 10 V - ensures stable blocking in battery-sensed monitoring circuits |
| Package | SOD123 - 2.65 mm × 1.55 mm footprint with 0.30 mm lead length, compatible with standard pick-and-place and reflow profiles |
| TJ Range | –55°C to +125°C - validated for under-hood ECU and lighting module environments |
| Qualification | AEC-Q101 qualified - meets stress test requirements for temperature cycling, HTRB, and ESD (HBM ≥2 kV) |
Pinout & Package
Package: SOD123 - surface-mount plastic case with cathode band marking; dimensions: 2.65 mm × 1.55 mm × 1.05 mm (L × W × H); matte tin-plated alloy 42 leadframe; moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to positive supply or switched node; requires adequate copper pour for thermal dissipation at 150 mA |
| Cathode (marked by band) | Forward current exit / reverse blocking terminal | Connected to ground or return path; cathode band orientation must align with PCB silkscreen for automated optical inspection |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring construction | Suppresses edge breakdown during repetitive 750 mA surge events (IFSM), extending lifetime in inductive load switching |
| AEC-Q101 qualification | Validated for automotive use including temperature cycling (–55°C ↔ +125°C, 1000 cycles) and high-temp reverse bias (HTRB at 125°C/1000 hrs) |
| Low VF at high IF | 0.45 V @ 10 mA and 1.00 V @ 250 mA - reduces self-heating in space-constrained 12 V/24 V subsystems |
| Halogen & antimony free | Meets JEDEC JS709C and IEC 61249-2-21: <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - compliant for global Tier 1 automotive sourcing |
Applications
| Engine Control Unit Protection | LED Headlamp Recirculation |
|---|---|
Use Scenario: Reverse polarity protection on 12 V input rail of MCU-based ECU modules exposed to service wiring errors. IC Role / Device Role / Timing Role: Unidirectional blocking device placed in series with main power input; conducts only during correct polarity. Use Value: Prevents catastrophic failure of downstream regulators and CAN transceivers during accidental battery reversal, leveraging 100 V VR rating and low VF to minimize voltage drop. | Use Scenario: Flyback diode across LED driver MOSFET in adaptive front-lighting systems. IC Role / Device Role / Timing Role: Freewheeling path for inductive current decay during PWM off-time; clamps voltage spike below MOSFET VDS limit. Use Value: Enables fast current decay (low CT = 12 pF @ 1 V) and low conduction loss (VF = 0.25 V @ 0.1 mA standby), improving system efficiency and thermal margin. |
| Body Control Module Sensing | Automotive Infotainment Power Sequencing |
Use Scenario: Reverse current isolation between dual-supply domains (e.g., 5 V microcontroller and 3.3 V sensor interface). IC Role / Device Role / Timing Role: Isolation diode preventing backfeed from higher-voltage domain into lower-voltage logic during power-up sequencing. Use Value: Ensures clean power-up order using low IR (≤0.5 µA @ 1.5 V) to avoid unintended wake-up or latch-up in always-on sensor nodes. | Use Scenario: OR-ing diode in redundant 5 V supply paths feeding infotainment head unit processor core rails. IC Role / Device Role / Timing Role: Passive OR-ing element enabling seamless switchover between primary and backup SMPS outputs. Use Value: Delivers low forward drop (VF ≤ 0.45 V @ 10 mA) to minimize voltage loss and thermal rise in high-density power delivery networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SBAT54AWT1G | 40 V VR, 200 mA IF, VF = 0.33 V @ 100 mA - lower voltage rating, higher current capability | Not rated to AEC-Q101; intended for consumer/commercial use only | Select only for non-automotive applications where VR margin is sufficient and qualification is not required |
| NSR0230P2T5G | 30 V VR, 200 mA IF, VF = 0.32 V @ 100 mA - smaller SOD-923 package (1.0 × 0.6 mm), higher IR (10 µA @ 10 V) | Lacks AEC-Q101 qualification and guard ring; unsuitable for under-hood temperature cycling | Use only in space-constrained, non-automotive portable electronics with ≤3.3 V bias rails |
Compared with SBAT54AWT1G and NSR0230P2T5G, BAT46WQ-7-F uniquely delivers AEC-Q101 compliance, 100 V blocking, and guard ring–enhanced surge immunity - making it the sole choice for automotive power rail protection where reliability and transient robustness are mandatory.
Availability
BAT46WQ-7-F is available at Aetrix Electronics and suitable for engine control units, LED lighting modules, body control modules, and infotainment power sequencing requiring stable component supply and full automotive qualification traceability.
Supply support for BAT46WQ-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 North America.
The BAT46WQ belongs to Diodes' AEC-Q101–qualified Schottky diode product line, engineered specifically for automotive power management, polarity protection, and inductive load recirculation in harsh-temperature environments.
FAQ
Is BAT46WQ-7-F suitable for 24 V commercial vehicle applications?
Yes. With a 100 V peak reverse voltage rating and AEC-Q101 qualification, BAT46WQ-7-F supports 24 V nominal systems including trucks and buses, providing ≥3× margin against ISO 7637-2 pulse 5a (120 V transient) and sustained operation up to +125°C junction temperature.
What is the maximum allowable soldering temperature profile for BAT46WQ-7-F?
The device is rated for moisture sensitivity level 1 per J-STD-020 and supports standard lead-free reflow profiles: peak temperature ≤260°C for ≤10 seconds, with ramp-up rate ≤3°C/s and ramp-down rate ≤6°C/s. Pre-bake is not required due to MSL-1 classification.
Does BAT46WQ-7-F have a specified junction-to-case thermal resistance (RθJC)?
No - RθJC is not published in the datasheet. Only RθJA values are provided: 420°C/W on FR-4 and 370°C/W on polyimide board. Thermal design must rely on PCB copper area and layout per Diodes' recommended SOD123 pad dimensions (X = 0.90 mm, Y = 0.95 mm, X1 = 4.05 mm).
Can BAT46WQ-7-F replace BAT54W in an existing design?
No - BAT54W has 30 V VR and is not AEC-Q101 qualified. Substituting BAT46WQ-7-F introduces higher voltage capability but may require layout review due to different SOD123 vs. SOT-323 thermal and mechanical behavior; functional compatibility depends on circuit's voltage margin and qualification requirements.
BAT46WQ-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 100 V
- Current - Average Rectified (Io):
- 150mA
- Voltage - Forward (Vf) (Max) @ If:
- 450 mV @ 10 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 2 µA @ 75 V
- Capacitance @ Vr, F:
- 12pF @ 1V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
- Operating Temperature - Junction:
- -55°C ~ 125°C
BAT46WQ-7-F FAQ
1.How can I place an order for BAT46WQ-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BAT46WQ-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 BAT46WQ-7-F reliable?
The price and inventory of BAT46WQ-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 BAT46WQ-7-F is usually 5 days.
3.What payment methods are accepted for BAT46WQ-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAT46WQ-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAT46WQ-7-F?
BAT46WQ-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAT46WQ-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 BAT46WQ-7-F?
For technical support, including BAT46WQ-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAT46WQ-7-F requirements.
6.How does Aetrix verify that BAT46WQ-7-F is sourced from the original manufacturer or authorized distributors?
All BAT46WQ-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 BAT46WQ-7-F meets industry standards.
7.What is the process for return or replacement of BAT46WQ-7-F?
All BAT46WQ-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BAT46WQ-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 BAT46WQ-7-F part is unused and in its original packaging.
Return procedure for BAT46WQ-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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