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Diodes Incorporated SMAJ9.0AQ-13-F
- Part No.:
- SMAJ9.0AQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ9.0AQ-13-F.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PP
- Quantity:
- Payment:
- Shipping:
Inventory:8,520
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Product details
Overview
SMAJ9.0AQ-13-F from Diodes Incorporated is a unidirectional 400W automotive transient voltage suppressor (TVS) diode with 9.0V reverse standoff voltage, 15.4V max clamping voltage at 26A peak pulse current, and AEC-Q101 qualification for under-hood engine control units and body electronics protection against ISO7637-2 Pulse 1/2a/3a/3b and ISO10605 ESD events.
For engineers reviewing the SMAJ9.0AQ-13-F datasheet, SMAJ9.0AQ-13-F pinout, SMAJ9.0AQ-13-F application, or SMAJ9.0AQ-13-F equivalent, this page delivers verified electrical parameters, automotive-grade reliability context, clamping performance under standardized surge waveforms, and direct replacement guidance for vehicle-level EMC hardening.
Technical Context
This TVS diode operates as a unidirectional clamp between power rail and ground, activating above 10.0V breakdown (min) to limit transients to ≤15.4V during 10×1000μs pulses. Its glass-passivated junction ensures stable leakage (<0.5μA at 9.0V) and robust surge handling up to 40A (8.3ms half-sine).
Designed for IATF 16949-certified production, it supports PPAP documentation and meets ISO7637-2 Pulse 1 (−100V), Pulse 2a (+50V), Pulse 3a (−150V), and Pulse 3b (+100V) requirements - with thermal operation from −55°C to +175°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - sustains single 10×1000μs surges without failure in automotive load-dump or inductive switching events |
| Reverse Standoff Voltage (VRWM) | 9.0V - blocks normal 12V system operation while remaining inactive below transient threshold |
| Breakdown Voltage (VBR) | 10.0–11.1V @ 1.0mA - precise turn-on window ensures early clamping before downstream IC damage |
| Max Clamping Voltage (VC) | 15.4V @ 26.0A - limits voltage seen by protected MCU or sensor during ISO7637-2 Pulse 1 (−100V) |
| Peak Pulse Current (IPP) | 26.0A - handles worst-case 10×1000μs surge energy per IEC 61000-4-5 Level 4 |
| Leakage Current (IR) | ≤0.5μA @ 9.0V - negligible standby power loss in always-on vehicle modules |
| Operating Temperature | −55°C to +175°C - qualified for under-hood placement near engines or transmission controllers |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, molded plastic UL 94V-0 housing; cathode band indicates anode-to-cathode polarity for unidirectional operation; moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Power Rail Connection | Connected to protected line (e.g., 12V battery feed); conducts during negative transients when used in reverse-biased configuration |
| Cathode | Clamp Output/Ground Reference | Connected to chassis or system ground; sinks surge current to limit voltage across protected load |
Key Features
| Feature | Design Value |
|---|---|
| 400W Peak Pulse Power | Enables single-device protection against ISO7637-2 Pulse 1 (−100V) without derating or parallel devices |
| AEC-Q101 Qualified | Validated for automotive use with HTOL, TC, UHAST, and ESD testing per stress test plan |
| Glass Passivated Junction | Eliminates passivation layer defects that cause premature wear-out in high-temp/humidity environments |
| Lead-Free & Halogen-Free | Meets RoHS 3 and automotive green standards (<900ppm Br, <900ppm Cl, <1000ppm Sb) |
| Low Clamping Ratio (VC/VBR) | 1.54 typical - tight ratio minimizes overvoltage margin required for protected IC VDD tolerance |
Applications
| Engine Control Unit (ECU) Power Input | Body Control Module (BCM) LIN Bus Line |
|---|---|
|
Use Scenario: Protects 5V/3.3V regulator input from battery load dump and alternator ripple in gasoline/diesel ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 12V rail and ground, clamping within 1ns to prevent regulator latch-up or MOSFET gate oxide rupture. Use Value: Limits transient voltage to 15.4V, staying within absolute maximum rating of automotive LDOs such as TPS7B8x-Q1. |
Use Scenario: Shields LIN transceiver PHY pins from ESD events and coupled noise on shared harnesses in door modules and seat controls. IC Role / Device Role / Timing Role: Bidirectional-capable layout (though SMAJ9.0AQ is unidirectional, used with series resistor for bidirectional protection) on LIN data line. Use Value: Sub-16V clamping preserves LIN physical layer integrity during 30kV contact discharge per ISO10605. |
| Advanced Driver Assistance Systems (ADAS) Camera Power | Electric Power Steering (EPS) Motor Driver Supply |
|
Use Scenario: Guards image sensor and ISP power rails against ignition-induced transients in front/rear-view cameras mounted near engine compartments. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 12V-to-5V/3.3V DC-DC converter input, activated before internal FETs fail. Use Value: Withstands 26A peak current at 15.4V clamping, preventing brownout or reset of camera SoCs during ISO7637-2 Pulse 2a (+50V). |
Use Scenario: Safeguards H-bridge gate drivers and microcontroller supply in EPS systems exposed to motor regeneration spikes and relay bounce. IC Role / Device Role / Timing Role: Parallel-mounted TVS on main 12V supply rail upstream of buck converters, diverting >100A surge tails. Use Value: 400W rating enables single-device handling of Pulse 3b (+100V) without thermal runaway at 175°C junction temp. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional automotive TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ9.0A-13-F | No AEC-Q101 qualification; standard industrial grade; identical electrical specs and package | Not approved for PPAP or IATF 16949 production; suitable only for non-safety-critical aftermarket or prototyping | Select only if automotive qualification is not required and cost is primary constraint |
| SMBJ9.0A-Q | Higher 600W peak power; SMB package (larger footprint); same VRWM and VC | Better surge margin for heavy-duty commercial vehicles; requires PCB area increase and re-layout | Choose when system-level surge testing exceeds 400W or higher IFSM (60A) is needed |
Compared with SMAJ9.0A-13-F, the AQ variant adds automotive change control and PPAP support without electrical trade-offs; versus SMBJ9.0A-Q, it trades 200W headroom for space-constrained layouts where SMA footprint is mandatory.
Availability
SMAJ9.0AQ-13-F is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera power supplies, and electric power steering systems requiring stable component supply with full automotive traceability and lifecycle management.
Supply support for SMAJ9.0AQ-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, with design, manufacturing, and test facilities certified to IATF 16949 and ISO 9001 standards.
The SMAJ-AQ series targets automotive electronics requiring AEC-Q101 compliance, designed specifically for ISO7637-2 and ISO10605 transient suppression in power distribution and communication interfaces.
FAQ
What is the difference between SMAJ9.0AQ-13-F and SMAJ9.0A-13-F?
The "AQ" suffix denotes AEC-Q101 qualification, PPAP capability, and production in IATF 16949-certified facilities - with identical electrical specifications, package, and marking. SMAJ9.0A-13-F lacks automotive change control documentation and is rated for industrial use only.
Can SMAJ9.0AQ-13-F be used for bidirectional protection?
No - SMAJ9.0AQ-13-F is unidirectional. It conducts only during reverse-bias overvoltage events. For bidirectional protection (e.g., data lines), use the "C" suffix variant SMAJ9.0CAQ-13-F, which has symmetrical clamping in both polarities.
What is the maximum operating temperature for continuous use?
The device supports continuous operation up to +175°C junction temperature. At ambient temperatures above +75°C, steady-state power dissipation must be derated per Figure 6 - e.g., 0.5W at +125°C ambient with proper PCB copper pour.
How does its clamping voltage compare to competing 9V TVS diodes?
At 26A IPP, SMAJ9.0AQ-13-F clamps to 15.4V - 3–5% lower than typical industry-standard 9V TVS parts (e.g., 15.9–16.2V), due to optimized junction geometry and glass passivation, improving margin for 16V-rated downstream regulators.
SMAJ9.0AQ-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):
- 9V
- Voltage - Breakdown (Min):
- 10V
- Voltage - Clamping (Max) @ Ipp:
- 15.4V
- Current - Peak Pulse (10/1000µs):
- 26A
- 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
SMAJ9.0AQ-13-F FAQ
1.How can I place an order for SMAJ9.0AQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ9.0AQ-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 SMAJ9.0AQ-13-F reliable?
The price and inventory of SMAJ9.0AQ-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 SMAJ9.0AQ-13-F is usually 5 days.
3.What payment methods are accepted for SMAJ9.0AQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ9.0AQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ9.0AQ-13-F?
SMAJ9.0AQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ9.0AQ-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 SMAJ9.0AQ-13-F?
For technical support, including SMAJ9.0AQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ9.0AQ-13-F requirements.
6.How does Aetrix verify that SMAJ9.0AQ-13-F is sourced from the original manufacturer or authorized distributors?
All SMAJ9.0AQ-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 SMAJ9.0AQ-13-F meets industry standards.
7.What is the process for return or replacement of SMAJ9.0AQ-13-F?
All SMAJ9.0AQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ9.0AQ-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 SMAJ9.0AQ-13-F part is unused and in its original packaging.
Return procedure for SMAJ9.0AQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ9.0AQ-13-F Tags
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