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Diodes Incorporated SMBJ12AQ-13-F
- Part No.:
- SMBJ12AQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ12AQ-13-F.pdf
- Description:
- TVS DIODE 12VWM 19.9VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:2,220
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Product details
Overview
SMBJ12AQ-13-F from Diodes Incorporated is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode designed for automotive circuit protection. It features a 12V reverse standoff voltage (VRWM), 13.3V minimum breakdown voltage (VBR), clamps to ≤19.9V at 30.2A peak pulse current (IPP), and meets AEC-Q101 qualification for under-hood applications.
For engineers reviewing the SMBJ12AQ-13-F datasheet, SMBJ12AQ-13-F pinout, SMBJ12AQ-13-F application, or SMBJ12AQ-13-F equivalent, this device is selected for ISO7637-2 Pulse 1/2a/3a/3b surge suppression and ISO10605 ESD protection in 12V automotive power networks-where precise clamping, low leakage (<0.5µA), and IATF 16949 traceable manufacturing are required.
Technical Context
This unidirectional TVS operates as a fast-acting shunt clamp during transients, triggering at ≥13.3V (VBR) and limiting voltage to ≤19.9V (VC) under 10×1000µs waveform stress. Its 600W peak pulse power rating enables robust handling of ISO7637-2 Pulse 1 (−150V) and Pulse 3a (−220V) without failure.
Designed for 12V battery rail protection, it exhibits 0.5µA max reverse leakage at VRWM, −55°C to +175°C operating junction temperature range, and SMB package thermal resistance optimized for PCB copper pour dissipation at TL = +75°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600W - sustains single 10×1000µs surges per ISO7637-2 without degradation |
| Reverse Standoff Voltage | 12.0V - blocks normal 12V system operation while remaining fully inactive |
| Breakdown Voltage | 13.3–14.7V @ 1mA - ensures reliable turn-on before downstream IC damage thresholds |
| Clamping Voltage | ≤19.9V @ 30.2A - limits voltage seen by protected load during worst-case Pulse 3a (−220V) |
| Leakage Current | ≤0.5µA @ 12V - avoids parasitic drain in always-on automotive modules |
| Operating Temperature | −55°C to +175°C - supports placement near engines or in cabin ECUs with high ambient exposure |
| AEC-Q101 Qualified | Yes - validated for automotive use with PPAP documentation and IATF 16949 production control |
Pinout & Package
Package: SMB (Surface-Mount Small Outline), molded plastic body with UL 94V-0 flammability rating, 0.1g mass, matte tin-plated terminals solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-impedance return path; defines unidirectional conduction direction |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., LIN bus, sensor supply); carries full transient current to ground |
Key Features
| Feature | Design Value |
|---|---|
| Automotive-grade transient suppression | Validated against ISO7637-2 Pulse 1 (−150V), Pulse 2a (+112V), Pulse 3a (−220V), Pulse 3b (+150V) |
| ESD immunity | 30kV air/contact discharge per ISO10605 (C = 150pF, R = 330Ω) |
| Green compliance | Halogen- and antimony-free; RoHS 3 (2015/863/EU) compliant with <900ppm Br/Cl, <1000ppm Sb |
| Thermal reliability | Steady-state power dissipation of 5.0W at TL = +75°C; derates linearly above +25°C (4.8W/°C) |
Applications
| Engine Control Unit (ECU) Power Input | Body Control Module (BCM) CAN Bus Protection |
|---|---|
Use Scenario: 12V supply line feeding microcontroller, fuel injector drivers, and sensors in engine bay. IC Role / Device Role / Timing Role: Unidirectional shunt clamp placed between battery rail and local LDO/regulator input. Use Value: Clamps ISO7637-2 Pulse 1 (−150V) to ≤19.9V, preventing latch-up or gate oxide rupture in downstream 5V/3.3V logic. |
Use Scenario: CAN_H/CAN_L lines exposed to load dump and ESD in door module wiring harnesses. IC Role / Device Role / Timing Role: Paired unidirectional TVS on each CAN line referenced to chassis ground. Use Value: Limits transient overshoot to <20V during Pulse 3b (+150V), preserving CAN transceiver common-mode range and bit error rate. |
| Infotainment Head Unit USB Port | ADAS Camera Power Line |
Use Scenario: 5V VBUS line of USB 2.0 interface connected to vehicle infotainment display. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS placed inline with VBUS prior to USB switch IC. Use Value: Suppresses 30kV contact ESD per ISO10605 without signal distortion, maintaining USB enumeration integrity. |
Use Scenario: 12V power feed to 77GHz radar camera module mounted behind front grille. IC Role / Device Role / Timing Role: Primary overvoltage clamp upstream of DC-DC converter input stage. Use Value: Withstands repeated Pulse 3a (−220V) events during cold cranking, ensuring uninterrupted camera operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12A-13-F | No AEC-Q101 qualification; standard industrial grade only | Lacks PPAP support and IATF 16949 traceability; not approved for safety-critical automotive systems | Select only for non-automotive or prototype validation where qualification is not mandated |
| SMCJ12A-Q | Higher 1500W peak power; SMC package (larger footprint, higher thermal mass) | Used where sustained surge energy exceeds SMBJ capability or board layout allows larger footprint | Choose when Pulse 1 energy exceeds 600W limit or thermal margin requires lower junction rise |
Compared with SMBJ12A-13-F, SMBJ12AQ-13-F adds AEC-Q101 qualification and automotive change control-critical for production ECUs-while SMCJ12A-Q trades compact SMB size for higher surge capacity in space-tolerant designs.
Availability
SMBJ12AQ-13-F is available at Aetrix Electronics and suitable for engine control units, body control modules, infotainment power rails, and ADAS camera systems requiring stable component supply across automotive production lifecycles.
Supply support for SMBJ12AQ-13-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 semiconductor manufacturer specializing in discrete, analog, and mixed-signal solutions for automotive, industrial, and consumer markets.
This device belongs to the SMBJ-AQ automotive TVS family, engineered specifically for ISO7637-2 and ISO10605 compliance in harsh-temperature vehicle environments with zero compromise on qualification rigor.
FAQ
What is the polarity configuration of SMBJ12AQ-13-F?
SMBJ12AQ-13-F is a unidirectional TVS diode with cathode band marking on the package. The cathode connects to the protected line (e.g., 12V rail), and the anode connects to ground. This configuration blocks positive transients only-negative-going surges are clamped via forward conduction.
Does SMBJ12AQ-13-F meet ISO7637-2 Pulse 3a requirements?
Yes. At 30.2A peak pulse current (IPP), its clamping voltage is ≤19.9V-well below the 24V maximum allowable for protected loads during ISO7637-2 Pulse 3a (−220V). Its 600W rating and −55°C to +175°C junction range ensure reliable operation under repeated Pulse 3a stress.
Can SMBJ12AQ-13-F be used in bi-directional protection schemes?
No. SMBJ12AQ-13-F is unidirectional only. For bi-directional protection (e.g., data lines like LIN or CAN), the bi-directional variant SMBJ12CAQ-13-F must be used-it has symmetric clamping for both polarities and no cathode band marking.
What is the steady-state power dissipation limit at 100°C ambient?
At TA = +100°C, the SMBJ12AQ-13-F's steady-state power dissipation is derated to 1.4W. This is calculated from its 5.0W rating at TL = +75°C and 4.8W/°C derating slope above +25°C, assuming proper PCB copper area and airflow per Diodes' recommended pad layout.
SMBJ12AQ-13-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-214AA, SMB
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 19.9V
- Current - Peak Pulse (10/1000µs):
- 30.2A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
SMBJ12AQ-13-F FAQ
1.How can I place an order for SMBJ12AQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ12AQ-13-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 SMBJ12AQ-13-F reliable?
The price and inventory of SMBJ12AQ-13-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ12AQ-13-F is usually 5 days.
3.What payment methods are accepted for SMBJ12AQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ12AQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ12AQ-13-F?
SMBJ12AQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ12AQ-13-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 SMBJ12AQ-13-F?
For technical support, including SMBJ12AQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ12AQ-13-F requirements.
6.How does Aetrix verify that SMBJ12AQ-13-F is sourced from the original manufacturer or authorized distributors?
All SMBJ12AQ-13-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 SMBJ12AQ-13-F meets industry standards.
7.What is the process for return or replacement of SMBJ12AQ-13-F?
All SMBJ12AQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ12AQ-13-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 SMBJ12AQ-13-F part is unused and in its original packaging.
Return procedure for SMBJ12AQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ12AQ-13-F Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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