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Diodes Incorporated SMAJ14AQ-13-F
- Part No.:
- SMAJ14AQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ14AQ-13-F.pdf
- Description:
- TVS DIODE 14VWM 23.2VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:10,200
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Product details
Overview
SMAJ14AQ-13-F from Diodes Incorporated is a unidirectional 400W automotive transient voltage suppressor (TVS) diode with 14V reverse standoff voltage, 23.2V max clamping voltage at 17.2A peak pulse current, and AEC-Q101 qualification. It protects CAN, LIN, and sensor interface circuits in 12V automotive power domains against ISO7637-2 Pulse 1 (−100V), Pulse 2a (+50V), and ISO10605 ESD (±30kV).
For engineers reviewing the SMAJ14AQ-13-F datasheet, SMAJ14AQ-13-F pinout, SMAJ14AQ-13-F application, or SMAJ14AQ-13-F equivalent, this page delivers verified electrical parameters, automotive compliance evidence, clamping performance under standardized surge waveforms, and real-world use context for power rail protection in engine control units, body control modules, and ADAS sensors.
Technical Context
This TVS operates as a unidirectional clamp between power rail and ground, triggering at 15.6–17.2V breakdown (VBR) to limit transients to ≤23.2V during 10×1000μs pulses. Its glass-passivated die ensures stable leakage (<0.5μA at 14V) and robust surge handling up to 40A IFSM (8.3ms half-sine).
Designed for IATF 16949-certified production, it meets ISO10605 (±30kV air/contact discharge) and ISO7637-2 Pulse 1/2a/3a/3b requirements - excluding Pulse 1 for devices with VRWM <13.5V, but SMAJ14AQ-13-F's 14V rating satisfies this threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - sustains single 10×1000μs surges without failure in automotive load-dump scenarios |
| Reverse Standoff Voltage (VRWM) | 14V - blocks normal 12V system operation while remaining fully inactive below surge threshold |
| Max Clamping Voltage (VC) | 23.2V @ IPP = 17.2A - limits downstream IC stress to safe levels during ISO7637-2 Pulse 2a (+50V) |
| Breakdown Voltage (VBR) | 15.6–17.2V @ IT = 1.0mA - precise turn-on window ensures reliable activation before protected circuit damage |
| Leakage Current (IR) | <0.5μA @ VRWM = 14V - negligible standby power loss and no interference with low-current sensor biasing |
| AEC-Q101 Qualified | Yes - validated for automotive temperature range (−55°C to +175°C) and PPAP-capable manufacturing |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, molded plastic UL 94V-0 housing; cathode band denotes polarity on unidirectional variant; weight ≈ 0.064g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground reference terminal | Connected to chassis or PCB ground plane; completes clamping path during negative transients |
| Cathode | Power rail connection | Placed in series with protected line (e.g., +12V battery feed); conducts when voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| 400W peak pulse power | Enables single-event suppression of high-energy load dump (ISO7637-2 Pulse 5a) without thermal runaway |
| Glass passivated die | Ensures long-term parameter stability and resistance to humidity-induced degradation in under-hood environments |
| AEC-Q101 qualification | Validates reliability for automotive safety-critical subsystems including powertrain and ADAS sensor interfaces |
| Lead-free, halogen-free "Green" construction | Meets RoHS 3 (2015/863/EU) and automotive ELV Directive requirements for end-of-life recyclability |
Applications
| Engine Control Unit (ECU) Power Input | Body Control Module (BCM) LIN Bus |
|---|---|
Use Scenario: Protects 12V supply input to microcontroller and analog front-end in gasoline/diesel ECUs exposed to alternator load dump and cranking transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery feed and local LDO/regulator input; clamps within nanoseconds to prevent overvoltage latch-up. Use Value: Limits voltage to ≤23.2V during −100V ISO7637-2 Pulse 1, ensuring MCU reset logic remains functional and EEPROM data integrity is preserved. |
Use Scenario: Shields LIN transceiver PHY layer from ESD events during service port connection and harness coupling noise in door modules and lighting controllers. IC Role / Device Role / Timing Role: TVS connected across LIN bus (LIN-H to GND); activated by ±30kV contact discharge per ISO10605. Use Value: Clamps ESD-induced overshoot to 23.2V, preventing damage to LIN transceiver ESD structures and maintaining bus communication integrity after discharge. |
| Radar Sensor Power Supply | ADAS Camera Module Interface |
Use Scenario: Guards 12V power input to millimeter-wave radar RF front-end and DSP in forward collision warning systems operating near engine compartments. IC Role / Device Role / Timing Role: TVS mounted at connector entry point; absorbs repetitive switching noise and infrequent load dump spikes. Use Value: Withstands 40A IFSM surge (8.3ms half-sine), enabling survival of multiple cranking cycles without parameter drift or leakage increase. |
Use Scenario: Protects FPD-Link III or GMSL serial interface lines between camera head and domain controller from cable-borne transients in rear-view and surround-view systems. IC Role / Device Role / Timing Role: TVS applied to power rails feeding serializer/deserializer ICs; complements differential-line ESD protection. Use Value: 14V VRWM matches nominal 12V supply with margin, avoiding false triggering while delivering 23.2V clamping to preserve signal integrity during ISO7637-2 Pulse 3b (+100V). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional automotive TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ14A-13-F | No AEC-Q101 qualification; standard industrial grade | Lacks PPAP documentation and IATF 16949 traceability; not approved for safety-critical vehicle functions | Select only for non-automotive or non-safety-relevant 12V systems where cost is primary constraint |
| SMCJ14A-Q | Higher 1500W PPK rating; SMC (DO-214AB) package; 25.1V VC @ 25.5A | Physically larger footprint; better suited for higher-energy transients but over-specified for typical CAN/LIN protection | Choose when protecting high-current power distribution nodes (e.g., junction box feeds) requiring >400W capability |
Compared with SMAJ14AQ-13-F, SMAJ14A-13-F lacks automotive qualification and process controls, while SMCJ14A-Q offers greater surge capacity at the cost of board space and higher clamping voltage - making SMAJ14AQ-13-F the optimal balance of AEC-Q101 compliance, 400W capability, and SMA footprint for mainstream automotive electronics.
Availability
SMAJ14AQ-13-F is available at Aetrix Electronics and suitable for engine control units, body control modules, and ADAS sensor power supplies requiring stable component supply with full automotive traceability and lifecycle management.
Supply support for SMAJ14AQ-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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability components for automotive, industrial, and computing markets.
The SMAJ(AQ) series targets automotive electronics needing AEC-Q101-qualified TVS diodes with precise clamping and ISO7637/ISO10605 compliance - designed specifically for 12V/24V power rail protection in harsh vehicular environments.
FAQ
Is SMAJ14AQ-13-F bidirectional or unidirectional?
SMAJ14AQ-13-F is unidirectional, indicated by the absence of "C" in its part number (e.g., SMAJ14CAQ-13-F would be bidirectional). It features a cathode band marking and clamps only positive transients relative to ground, making it ideal for DC power rail protection where reverse voltage is not expected.
What is the maximum operating temperature for SMAJ14AQ-13-F?
The device operates from −55°C to +175°C junction temperature (TJ), validated per AEC-Q101 stress testing. This enables deployment in under-hood locations such as engine control units and radar modules where ambient temperatures exceed 125°C, provided PCB thermal design maintains TJ within limits.
Does SMAJ14AQ-13-F meet ISO7637-2 Pulse 1 requirements?
Yes - SMAJ14AQ-13-F's 14V VRWM exceeds the 13.5V minimum threshold specified in DS40739 Note 5, qualifying it for ISO7637-2 Pulse 1 (−100V) suppression. Its 23.2V clamping voltage ensures protected circuits remain below 28V, satisfying typical automotive IC absolute maximum ratings.
Can SMAJ14AQ-13-F replace SMAJ15A-13-F in an existing design?
No - SMAJ14AQ-13-F has 14V VRWM and 15.6–17.2V VBR, while SMAJ15A-13-F specifies 15V VRWM and 16.7–18.5V VBR. Substituting introduces 1V lower standoff, increasing risk of leakage-induced power loss or false triggering in noisy 12V systems; AEC-Q101 qualification also differs.
SMAJ14AQ-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):
- 14V
- Voltage - Breakdown (Min):
- 15.6V
- Voltage - Clamping (Max) @ Ipp:
- 23.2V
- Current - Peak Pulse (10/1000µs):
- 17.2A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMA
SMAJ14AQ-13-F FAQ
1.How can I place an order for SMAJ14AQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ14AQ-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 SMAJ14AQ-13-F reliable?
The price and inventory of SMAJ14AQ-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 SMAJ14AQ-13-F is usually 5 days.
3.What payment methods are accepted for SMAJ14AQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ14AQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ14AQ-13-F?
SMAJ14AQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ14AQ-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 SMAJ14AQ-13-F?
For technical support, including SMAJ14AQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ14AQ-13-F requirements.
6.How does Aetrix verify that SMAJ14AQ-13-F is sourced from the original manufacturer or authorized distributors?
All SMAJ14AQ-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 SMAJ14AQ-13-F meets industry standards.
7.What is the process for return or replacement of SMAJ14AQ-13-F?
All SMAJ14AQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ14AQ-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 SMAJ14AQ-13-F part is unused and in its original packaging.
Return procedure for SMAJ14AQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ14AQ-13-F Tags
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