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Diodes Incorporated SMAJ11AQ-13-F
- Part No.:
- SMAJ11AQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ11AQ-13-F.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PP
- Quantity:
- Payment:
- Shipping:
Inventory:8,127
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Product details
Overview
SMAJ11AQ-13-F from Diodes Incorporated is a unidirectional 400W automotive transient voltage suppressor (TVS) diode with 11V reverse standoff voltage, 18.2V max clamping voltage at 22A peak pulse current, and AEC-Q101 qualification for under-hood electronics. It protects LIN bus interfaces, body control modules, and sensor signal lines against ISO7637-2 Pulse 1 (–100V), Pulse 2a (+50V), and ISO10605 ESD (±30kV).
For engineers reviewing the SMAJ11AQ-13-F datasheet, SMAJ11AQ-13-F pinout, SMAJ11AQ-13-F application, or SMAJ11AQ-13-F equivalent, this page delivers verified clamping performance, AEC-Q101 compliance status, IATF 16949 manufacturing evidence, and direct comparison to SMAJ12AQ-13-F and P6SMB11A.
Technical Context
This TVS diode operates as a unidirectional clamp in series with power or signal lines, activating when transient voltage exceeds 12.2V (min breakdown) and limiting downstream voltage to ≤18.2V at 22A. Its glass-passivated junction ensures stable leakage (<0.5µA at 11V) and robust surge handling across –55°C to +175°C junction temperature.
Designed for automotive subsystems subject to load dump and ESD, it meets ISO7637-2 Pulse 1/2a/3a/3b waveforms and ISO10605 150pF/330Ω discharge. The SMA package supports surface-mount reflow with moisture sensitivity level 1 and lead-free matte tin plating per MIL-STD-202.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - sustains single 10×1000µs transients without failure |
| Reverse Standoff Voltage (VRWM) | 11V - blocks normal 12V automotive supply while remaining inactive |
| Max Clamping Voltage (VC) | 18.2V @ IPP = 22A - limits protected circuit voltage during ISO7637-2 Pulse 1 |
| Breakdown Voltage (VBR) | 12.2V min @ IT = 1.0mA - ensures reliable turn-on before system damage threshold |
| Leakage Current (IR) | <0.5µA @ VRWM = 11V - avoids parasitic loading on low-power sensor rails |
| Operating Temperature | –55°C to +175°C - qualified for engine bay and transmission control unit placement |
Pinout & Package
Package: SMA (DO-214AC), molded plastic UL 94V-0, 0.064g weight, cathode band polarity indicator.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path | Connected to ground or low-impedance chassis reference for clamping action |
| Cathode | Protected line input | Connected to power rail or signal line requiring surge suppression |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use with PPAP capability and IATF 16949 manufacturing |
| Glass-passivated die | Ensures long-term stability of VBR and IR under thermal cycling and humidity |
| 40A peak surge rating | Withstands 8.3ms half-sine surges up to 40A without degradation |
| Lead-free & halogen-free | RoHS 3 compliant (2015/863/EU); Br+Cl <1500ppm, Sb <1000ppm |
| Low clamping ratio | VC/VRWM = 1.65 - tight voltage margin preserves downstream IC operating headroom |
Applications
| Engine Control Unit (ECU) Power Input | LIN Bus Transceiver Protection |
|---|---|
Use Scenario: 12V battery feed to microcontroller power supply in gasoline/diesel ECUs exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between fuse output and DC-DC input capacitor. Use Value: Clamps ISO7637-2 Pulse 1 (–100V) to ≤18.2V, preventing LDO overvoltage failure and MCU brownout. |
Use Scenario: LIN physical layer interface (e.g., TJA1020) connected to vehicle harness subject to ESD and coupled noise. IC Role / Device Role / Timing Role: TVS mounted directly at connector entry point, anode to ground, cathode to LIN bus line. Use Value: Limits ISO10605 contact discharge (±30kV) to sub-20V peak, preserving transceiver ESD immunity without signal distortion. |
| Body Control Module (BCM) Door Switch Inputs | Automotive Camera Power Rail |
Use Scenario: Mechanical switch inputs (e.g., door ajar, trunk release) routed through long harnesses prone to inductive kick and ESD. IC Role / Device Role / Timing Role: TVS placed at microcontroller GPIO input, cathode to signal line, anode to chassis ground. Use Value: Suppresses >1kV transients from relay coil de-energization while maintaining <0.5µA leakage for accurate logic-level sensing. |
Use Scenario: 12V power input to rear-view camera module mounted near bumper, exposed to road splash ESD and ignition noise. IC Role / Device Role / Timing Role: TVS installed upstream of buck converter, cathode to 12V rail, anode to ground plane. Use Value: Withstands repeated ISO7637-2 Pulse 3a (–150V) events without parameter shift, ensuring continuous video output. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12AQ-13-F | 12V VRWM, 19.9V VC @ 20.1A - higher standoff, looser clamping margin | Better suited for 13.5V nominal systems where 11V VRWM risks false triggering | Select if system nominal voltage exceeds 12.5V or if margin above battery float voltage is critical |
| P6SMB11A | Same 11V VRWM but 600W PPK, DO-214AA package, higher VF (4.5V), non-AEC-Q101 | Higher surge capacity but lacks automotive qualification and tighter thermal profile | Acceptable for industrial controls; avoid in safety-critical or PPAP-required automotive programs |
Compared with SMAJ12AQ-13-F, SMAJ11AQ-13-F offers tighter clamping (18.2V vs. 19.9V) for lower-voltage ICs, while P6SMB11A trades automotive compliance for higher single-pulse energy handling-making SMAJ11AQ-13-F optimal for AEC-Q101–mandated 12V signal/power protection.
Availability
SMAJ11AQ-13-F is available at Aetrix Electronics and suitable for engine control units, LIN bus nodes, body control modules, and automotive camera power rails requiring stable component supply across extended temperature ranges and automotive qualification.
Supply support for SMAJ11AQ-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 company specializing in discrete, analog, and mixed-signal solutions for automotive, industrial, and consumer markets, with design centers across Asia, Europe, and the US.
This device belongs to the SMAJ(AQ) automotive TVS family, engineered specifically for ISO7637-2 and ISO10605 compliance in harsh-temperature vehicle subsystems, with emphasis on AEC-Q101 reliability and IATF 16949 traceability.
FAQ
What is the maximum clamping voltage of SMAJ11AQ-13-F at its rated peak pulse current?
The maximum clamping voltage (VC) is 18.2V at a peak pulse current (IPP) of 22.0A, measured using the standardized 10×1000µs waveform per Figure 4 of DS40739 Rev. 17-2. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuits during transient events.
Is SMAJ11AQ-13-F suitable for bi-directional signal line protection?
No - SMAJ11AQ-13-F is unidirectional, indicated by the absence of "C" in its part number. Bi-directional operation requires the "C" suffix (e.g., SMAJ11CAQ-13-F), which provides symmetrical clamping for AC-coupled or differential lines like CAN or USB. Using this part on bidirectional lines risks forward conduction and improper protection.
Does SMAJ11AQ-13-F require derating at elevated ambient temperatures?
Yes - peak pulse power must be derated linearly above +25°C ambient, per Figure 1 in DS40739. At +85°C TA, PPK is reduced to ~70% (280W); at +125°C, it falls to ~45% (180W). Steady-state power dissipation also derates from 1.0W at TL=+75°C to zero at TJ=+175°C, per Figure 6.
How is AEC-Q101 qualification verified for SMAJ11AQ-13-F?
Qualification is confirmed via Diodes Incorporated's publicly documented AEC-Q101 test reports, including HTGB, HTRB, TCT, UHAST, and ESD testing per stress levels defined in the AEC standard. The part is manufactured in IATF 16949–certified facilities and supports PPAP submission with full material traceability and process control records.
SMAJ11AQ-13-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-214AC, SMA
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 11V
- Voltage - Breakdown (Min):
- 12.2V
- Voltage - Clamping (Max) @ Ipp:
- 18.2V
- Current - Peak Pulse (10/1000µs):
- 22A
- Power - Peak Pulse:
- 400W
- 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:
- SMA
SMAJ11AQ-13-F FAQ
1.How can I place an order for SMAJ11AQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ11AQ-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 SMAJ11AQ-13-F reliable?
The price and inventory of SMAJ11AQ-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 SMAJ11AQ-13-F is usually 5 days.
3.What payment methods are accepted for SMAJ11AQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ11AQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ11AQ-13-F?
SMAJ11AQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ11AQ-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 SMAJ11AQ-13-F?
For technical support, including SMAJ11AQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ11AQ-13-F requirements.
6.How does Aetrix verify that SMAJ11AQ-13-F is sourced from the original manufacturer or authorized distributors?
All SMAJ11AQ-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 SMAJ11AQ-13-F meets industry standards.
7.What is the process for return or replacement of SMAJ11AQ-13-F?
All SMAJ11AQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ11AQ-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 SMAJ11AQ-13-F part is unused and in its original packaging.
Return procedure for SMAJ11AQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ11AQ-13-F Tags
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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