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Diodes Incorporated SMAJ13AQ-13-F
- Part No.:
- SMAJ13AQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ13AQ-13-F.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR SMA
- Quantity:
- Payment:
- Shipping:
Inventory:6,870
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Product details
Overview
SMAJ13AQ-13-F from Diodes Incorporated is a unidirectional 400W automotive transient voltage suppressor (TVS) diode with 13V reverse standoff voltage, 21.5V max clamping voltage at 18.6A peak pulse current, and AEC-Q101 qualification. It protects CAN, LIN, and sensor interface circuits in engine control units and body electronics against ISO7637-2 Pulse 1/2a/3a/3b transients and ISO10605 ESD events.
For engineers reviewing the SMAJ13AQ-13-F datasheet, SMAJ13AQ-13-F pinout, SMAJ13AQ-13-F application, or SMAJ13AQ-13-F equivalent, this page delivers verified clamping performance, AEC-Q101 compliance status, IATF 16949 manufacturing traceability, and direct comparison to industry-standard TVS alternatives for automotive power rail and signal line protection.
Technical Context
This unidirectional TVS diode operates as a fast-acting shunt clamp on automotive power rails and low-voltage signal lines, activating within nanoseconds when transient voltage exceeds 13V VRWM. Its glass-passivated junction ensures stable breakdown behavior across -55°C to +175°C junction temperature range.
It meets ISO7637-2 Pulse 1 (-100V), Pulse 2a (+50V), Pulse 3a (-150V), and Pulse 3b (+100V) test profiles, and supports 30kV air/contact discharge per ISO10605 using 150pF/330Ω network - critical for infotainment head units and ADAS camera modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - sustains 10×1000μs transients without failure in 12V automotive systems |
| Reverse Standoff Voltage (VRWM) | 13V - sets clamping threshold just above nominal 12V battery rail, avoiding false triggering |
| Max Clamping Voltage (VC) | 21.5V @ 18.6A - limits downstream IC stress to safe levels during ISO7637-2 Pulse 1 (-100V) |
| Breakdown Voltage (VBR) | 14.4–15.9V @ 1.0mA - tight 10.5% tolerance ensures consistent turn-on across production lots |
| Leakage Current (IR) | <0.5μA @ 13V - negligible standby power loss in always-on vehicle networks |
| Operating Temperature | -55°C to +175°C - supports under-hood placement in engine control modules |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, molded plastic UL 94V-0 housing, cathode band polarity indicator, 0.064g weight, moisture sensitivity level 1.
| 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., CAN_H, LIN bus, 12V rail); carries full transient current |
Key Features
| Feature | Design Value |
|---|---|
| 400W peak pulse rating | Enables single-device protection of 12V power inputs against worst-case ISO7637-2 Pulse 1 (-100V) without derating |
| AEC-Q101 qualified | Validated for automotive use with PPAP capability and IATF 16949 manufacturing controls |
| Glass-passivated die | Ensures long-term reliability and stable VBR drift under thermal cycling and humidity exposure |
| Lead-free, halogen-free "Green" construction | Complies with RoHS 3 (2015/863/EU) and automotive ELV Directive requirements |
Applications
| Engine Control Unit (ECU) Power Input | CAN FD 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: Shunt clamping device placed between VBAT and GND, activated within <1ns upon overvoltage detection. Use Value: Limits transient voltage to ≤21.5V, preventing damage to 3.3V/5V LDOs and MCU I/O pins during ISO7637-2 Pulse 1 (-100V). |
Use Scenario: Bidirectional data line protection for CAN FD nodes operating up to 5Mbps in ADAS domain controllers. IC Role / Device Role / Timing Role: Unidirectional TVS on CAN_H line referenced to chassis ground, suppressing common-mode surges while preserving signal integrity. Use Value: Maintains <1pF parasitic capacitance impact, ensuring <1% signal distortion at 5MHz edge rates per ISO11898-2. |
| LIN Bus Sensor Interface | Body Control Module (BCM) Lighting Driver |
Use Scenario: Protection of LIN transceivers connected to door module switches and mirror position sensors. IC Role / Device Role / Timing Role: Low-leakage (≤0.5μA) clamp on LIN bus line, active only during ESD or load-switching transients. Use Value: Prevents latch-up in LIN PHY ICs during 30kV ISO10605 contact discharge without affecting 19.2kbps bus timing. |
Use Scenario: Output stage protection for LED driver ICs powering interior ambient lighting and puddle lamps. IC Role / Device Role / Timing Role: Parallel-connected TVS on switched 12V output, clamping inductive kickback from relay coils and solenoid loads. Use Value: Absorbs 40A IFSM surge current from 12V relay de-energization, eliminating need for external snubbers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ13A-13-F | Non-automotive grade; lacks AEC-Q101 qualification and PPAP documentation | Restricted to non-safety-critical consumer or industrial designs | Select only if automotive change control, IATF 16949 traceability, or PPAP submission is not required |
| SMBJ13A-Q | Higher 600W PPK rating; SMB package (larger footprint, 0.11g weight) | Better suited for high-energy transients in battery management systems | Choose when system-level testing requires >400W margin or board layout allows SMB footprint |
Compared with SMAJ13A-13-F, the AQ variant adds AEC-Q101 validation and IATF 16949 sourcing - essential for Tier 1 automotive BOMs; versus SMBJ13A-Q, it trades 200W peak power for 30% smaller PCB area and lower assembly cost in space-constrained ECUs.
Availability
SMAJ13AQ-13-F is available at Aetrix Electronics and suitable for engine control units, CAN FD communication nodes, and LIN-based sensor interfaces requiring stable component supply across automotive production lifecycles.
Supply support for SMAJ13AQ-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, headquartered in Plano, Texas, with design centers across Asia and manufacturing in IATF 16949-certified facilities.
The SMAJ-AQ series is part of Diodes' automotive-grade TVS portfolio, engineered specifically for ISO7637-2 and ISO10605 compliance in powertrain, chassis, and body electronics applications.
FAQ
What is the maximum clamping voltage of SMAJ13AQ-13-F at its rated peak pulse current?
The maximum clamping voltage (VC) is 21.5V at 18.6A peak pulse current, measured per 10×1000μs waveform (Figure 4 in DS40739). This value is guaranteed across -55°C to +175°C operating temperature and defines the upper voltage limit imposed on protected circuitry during transient events.
Is SMAJ13AQ-13-F suitable for bidirectional signal lines like CAN or LIN?
SMAJ13AQ-13-F is unidirectional and intended for DC-biased lines such as 12V power rails or CAN_H referenced to ground. For true bidirectional protection (e.g., CAN differential pair), Diodes offers the SMAJ13CAQ-13-F variant with 'C' suffix - confirmed in Table 1 of DS40739.
Does this TVS diode 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 drops to ~45% (180W). Steady-state power dissipation is limited to 1.0W at TL = +75°C, per thermal curve in Figure 6.
How does the AQ suffix differ from standard SMAJ13A-13-F?
The 'AQ' suffix denotes full AEC-Q101 qualification, PPAP capability, and production in IATF 16949-certified facilities. Standard SMAJ13A-13-F lacks automotive change control, certified process validation, and extended reliability testing - making AQ mandatory for Tier 1 automotive designs per OEM requirements.
SMAJ13AQ-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):
- 13V
- Voltage - Breakdown (Min):
- 14.4V
- Voltage - Clamping (Max) @ Ipp:
- 21.5V
- Current - Peak Pulse (10/1000µs):
- 18.6A
- 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
SMAJ13AQ-13-F FAQ
1.How can I place an order for SMAJ13AQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ13AQ-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 SMAJ13AQ-13-F reliable?
The price and inventory of SMAJ13AQ-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 SMAJ13AQ-13-F is usually 5 days.
3.What payment methods are accepted for SMAJ13AQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ13AQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ13AQ-13-F?
SMAJ13AQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ13AQ-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 SMAJ13AQ-13-F?
For technical support, including SMAJ13AQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ13AQ-13-F requirements.
6.How does Aetrix verify that SMAJ13AQ-13-F is sourced from the original manufacturer or authorized distributors?
All SMAJ13AQ-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 SMAJ13AQ-13-F meets industry standards.
7.What is the process for return or replacement of SMAJ13AQ-13-F?
All SMAJ13AQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ13AQ-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 SMAJ13AQ-13-F part is unused and in its original packaging.
Return procedure for SMAJ13AQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ13AQ-13-F Tags
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ESD9B5.0ST5G
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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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