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Diodes Incorporated SMAJ14CAQ-13-F
- Part No.:
- SMAJ14CAQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ14CAQ-13-F.pdf
- Description:
- TVS DIODE 14VWM 23.2VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:2,438
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Product details
Overview
SMAJ14CAQ-13-F from Diodes Incorporated is a bi-directional 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 for under-hood engine control and infotainment power line protection.
For engineers reviewing the SMAJ14CAQ-13-F datasheet, SMAJ14CAQ-13-F pinout, SMAJ14CAQ-13-F application, or SMAJ14CAQ-13-F equivalent, this device supports ISO7637-2 Pulse 1/2a/3a/3b surge suppression and ISO10605 ESD protection in automotive ECUs, body controllers, and ADAS sensor interfaces requiring robust bidirectional clamping.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, delivering 23.2V clamping at 17.2A (10×1000μs waveform) with ≤0.5μA reverse leakage at 14V VRWM. Its glass-passivated junction ensures stable breakdown behavior over -55°C to +175°C junction temperature range.
Designed for automotive-grade reliability, it meets IATF 16949 manufacturing standards, supports PPAP documentation, and maintains 400W peak pulse power dissipation with thermal derating above +25°C ambient - critical for sustained surge events in 12V/24V vehicle electrical systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - sustains single 10×1000μs transients without failure in ISO7637-2 Pulse 3b (+100V) conditions |
| Reverse Standoff Voltage | 14V - blocks normal 12V system operation while triggering clamping during overvoltage events |
| Max Clamping Voltage | 23.2V @ 17.2A - limits downstream IC voltage stress below 24V rail tolerance during 50V Pulse 2a surges |
| Breakdown Voltage | 15.6–17.2V @ 1mA - ensures precise, repeatable conduction onset across production lots |
| Operating Temperature | -55°C to +175°C - enables placement near engines, transmissions, and power inverters |
| AEC-Q101 Qualified | Yes - validated for automotive use with certified PPAP and change control processes |
Pinout & Package
Package: SMA (Surface Mount Assembly), molded plastic UL 94V-0 housing, 0.064g weight, cathode band omitted (bi-directional configuration).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | Conducts during negative-going surges (e.g., ISO7637-2 Pulse 1: -100V) |
| Cathode | Transient current entry (positive polarity) | Conducts during positive-going surges (e.g., ISO7637-2 Pulse 2a: +50V) |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of AC-coupled or floating automotive signal/power lines without polarity constraints |
| Glass passivated die | Ensures long-term stability of VBR and leakage under thermal cycling and humidity exposure |
| Lead-free & halogen-free | Meets RoHS 3 and automotive "Green" requirements (<900ppm Br/Cl, <1000ppm Sb) |
| Moisture sensitivity Level 1 | Eliminates bake requirements before reflow, reducing assembly cost and risk of popcorning |
Applications
| Engine Control Unit (ECU) Power Input | Automotive Infotainment Display Interface |
|---|---|
Use Scenario: Protects 12V supply rail of diesel/gasoline ECU against load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional TVS clamps both positive and negative transients on main power input before DC-DC converters. Use Value: Limits voltage to ≤23.2V during ISO7637-2 Pulse 1 (-100V) and Pulse 2a (+50V), preventing MCU brownout or regulator latch-up. |
Use Scenario: Shields LVDS or FPD-Link III video interface lines between head unit and display from ESD and cable discharge. IC Role / Device Role / Timing Role: Low-capacitance bi-directional clamp placed at connector side to absorb ±30kV contact discharge per ISO10605. Use Value: Maintains signal integrity with <0.5μA leakage at 14V, avoiding DC bias shift in high-speed differential pairs. |
| ADAS Radar Sensor Power Supply | Body Control Module (BCM) LIN Bus Line |
Use Scenario: Guards 5V/3.3V power rails feeding 77GHz radar MMICs from battery transients during cold crank. IC Role / Device Role / Timing Role: Fast-response TVS placed adjacent to LDO input to suppress sub-100ns spikes induced by switching regulators. Use Value: Achieves 23.2V clamping within 1ns response time, preserving radar RF front-end bias stability. |
Use Scenario: Protects LIN transceiver PHY pins against ESD and battery reversal during service disconnect. IC Role / Device Role / Timing Role: Bi-directional clamp on LIN bus line (VPIN/VN) referenced to ground, handling ±30kV air/contact discharge. Use Value: Withstands repeated 30kV discharges without parameter drift, ensuring >10-year field reliability in door modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bi-directional automotive TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ14C-13-F | No AEC-Q101 qualification; standard industrial grade only | Lacks PPAP support and IATF 16949 traceability | Select only for non-automotive or prototype use where automotive compliance is not required |
| TPSM14CQ | Same 14V VRWM but 600W peak power; larger SMC package (7.1mm × 6.2mm) | Higher surge margin but incompatible with SMA footprint and board space | Choose when system-level testing requires >400W margin and PCB layout allows SMC rework |
Compared with SMAJ14C-13-F, the SMAJ14CAQ-13-F adds AEC-Q101 validation and PPAP readiness for production release; versus TPSM14CQ, it trades peak power for direct SMA drop-in replacement capability in space-constrained automotive modules.
Availability
SMAJ14CAQ-13-F is available at Aetrix Electronics and suitable for engine control units, ADAS sensor modules, and infotainment head units requiring stable component supply with full automotive qualification documentation.
Supply support for SMAJ14CAQ-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.
This part belongs to the SMAJ-AQ automotive TVS family, engineered specifically for ISO7637-2 and ISO10605 compliance in safety-critical vehicle subsystems with zero-tolerance for unqualified components.
FAQ
What is the clamping voltage of SMAJ14CAQ-13-F at its rated peak pulse current?
The maximum clamping voltage is 23.2V measured at 17.2A peak pulse current using the standardized 10×1000μs waveform per IEC 61000-4-5. This value is guaranteed across the full operating temperature range (-55°C to +175°C) and ensures downstream circuitry remains within safe voltage limits during surge events.
Does SMAJ14CAQ-13-F require special PCB layout considerations?
Yes - maintain symmetric trace routing to both terminals, minimize loop area between anode/cathode and ground plane, and use thermal relief pads per Diodes' recommended SMA pad layout (X=2.50mm, Y=1.70mm). Avoid vias under the package body to prevent solder voiding and ensure mechanical reliability under thermal cycling.
How does the bi-directional design affect its use in DC power lines?
It provides symmetrical protection on DC lines without polarity dependency - conducting during both positive overvoltage (e.g., load dump) and negative transients (e.g., battery reversal or inductive kickback). Unlike uni-directional TVS diodes, no external series blocking diode is needed, simplifying design and reducing BOM count.
Is SMAJ14CAQ-13-F compatible with lead-free reflow profiles?
Yes - it uses matte tin lead-free plating and is qualified for standard JEDEC J-STD-020 Level 1 moisture sensitivity. It withstands peak reflow temperatures up to 260°C for 30 seconds without degradation, matching IPC/JEDEC Class 3 assembly requirements for automotive electronics.
SMAJ14CAQ-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:
- -
- Bidirectional Channels:
- 1
- 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
SMAJ14CAQ-13-F FAQ
1.How can I place an order for SMAJ14CAQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ14CAQ-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 SMAJ14CAQ-13-F reliable?
The price and inventory of SMAJ14CAQ-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 SMAJ14CAQ-13-F is usually 5 days.
3.What payment methods are accepted for SMAJ14CAQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ14CAQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ14CAQ-13-F?
SMAJ14CAQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ14CAQ-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 SMAJ14CAQ-13-F?
For technical support, including SMAJ14CAQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ14CAQ-13-F requirements.
6.How does Aetrix verify that SMAJ14CAQ-13-F is sourced from the original manufacturer or authorized distributors?
All SMAJ14CAQ-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 SMAJ14CAQ-13-F meets industry standards.
7.What is the process for return or replacement of SMAJ14CAQ-13-F?
All SMAJ14CAQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ14CAQ-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 SMAJ14CAQ-13-F part is unused and in its original packaging.
Return procedure for SMAJ14CAQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ14CAQ-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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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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