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Diodes Incorporated SMCJ18CAQ-13-F
- Part No.:
- SMCJ18CAQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ18CAQ-13-F.pdf
- Description:
- TVS DIODE 18VWM 29.2VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:1,817
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Product details
Overview
SMCJ18CAQ-13-F from Diodes Incorporated is a bidirectional 1,500W automotive transient voltage suppressor (TVS) diode in SMC package, with 18V reverse standoff voltage (VRWM), 29.2V max clamping voltage (VC) at 51.4A peak pulse current (IPP), and AEC-Q101 qualification for under-hood power line protection against ISO7637-2 Pulse 1/2a/3a/3b and ISO10605 ESD events.
For engineers reviewing the SMCJ18CAQ-13-F datasheet, SMCJ18CAQ-13-F pinout, SMCJ18CAQ-13-F application, or SMCJ18CAQ-13-F equivalent, this part supports robust surge immunity design in automotive ECUs, body control modules, and infotainment power rails where fast-response, high-energy clamping and IATF 16949 traceability are required.
Technical Context
This bidirectional TVS operates symmetrically across polarity, delivering sub-nanosecond response to transients while maintaining low leakage (<5 µA at VRWM) and stable clamping performance over -55°C to +150°C junction temperature. Its glass-passivated die ensures consistent breakdown behavior under repeated surge stress.
The device complies with ISO7637-2 Pulse 1 (-100V), Pulse 2a (+50V), Pulse 3a (-150V), and Pulse 3b (+100V), and meets ISO10605 ESD requirements (30kV air/contact discharge with 150pF/330Ω network), making it suitable for CAN/LIN bus power rail protection and sensor supply conditioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500W - sustains single 10×1000µs surges up to 51.4A without failure |
| Reverse Standoff Voltage | 18.0V - blocks normal operating voltage up to 18V before clamping begins |
| Max Clamping Voltage | 29.2V @ IPP = 51.4A - limits downstream voltage to safe level during worst-case surge |
| Breakdown Voltage | 20.0–22.1V @ IT = 1.0mA - defines precise conduction onset threshold for design margining |
| Leakage Current | <5.0µA @ VRWM - minimizes standby power loss in always-on automotive circuits |
| Operating Temp Range | -55°C to +150°C - supports placement near engines, transmissions, and power converters |
| AEC-Q101 Qualified | Yes - validated for automotive reliability including HTOL, TCT, and ESD testing |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, molded plastic body with UL 94V-0 rating, cathode band omitted (bidirectional configuration), 0.21g weight, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals function identically; no polarity dependency enables simplified PCB layout on bidirectional lines |
| Case / Body | Thermal and mechanical interface | Exposed copper pad provides primary thermal path to PCB; requires ≥25 mm² 2-oz copper pour for PM(AV) = 5W derating |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating automotive signals (e.g., LIN, analog sensors) without external polarity logic |
| Glass-passivated die | Ensures stable VBR over lifetime and eliminates parameter drift due to humidity or bias stress in under-hood environments |
| Lead-free & halogen-free | Meets RoHS 3 (2015/863/EU) and automotive green standards (<900ppm Br/Cl, <1000ppm Sb) |
| IATF 16949 manufacturing | Guarantees full traceability, PPAP documentation support, and change control rigor required for Tier 1 automotive sourcing |
Applications
| Engine Control Unit (ECU) Power Input | Body Control Module (BCM) CAN Bus Supply |
|---|---|
Use Scenario: 12V battery rail in gasoline/diesel engine compartments exposed to load dump (ISO7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Primary overvoltage clamp upstream of DC/DC converters and microcontroller LDOs. Use Value: Limits transient excursions to ≤29.2V, preventing latch-up or gate oxide damage in 3.3V/5V logic supplies. |
Use Scenario: 12V supply feeding isolated CAN transceivers in door modules and lighting controllers. IC Role / Device Role / Timing Role: Bidirectional surge limiter on shared VCC line protecting multiple CAN PHYs simultaneously. Use Value: Eliminates need for dual unidirectional TVS devices, reducing BOM count and PCB area by 35% versus discrete solutions. |
| Infotainment Head Unit USB Power | Rear Camera Power Line (12V) |
Use Scenario: USB VBUS line powered from vehicle 12V via buck converter, subject to ESD coupling from user ports. IC Role / Device Role / Timing Role: Secondary ESD clamp after primary filter, handling contact discharge per ISO10605. Use Value: Withstands 30kV contact discharge without degradation, preserving USB enumeration integrity after repeated hot-plug events. |
Use Scenario: 12V feed to rear-view camera module mounted on vehicle exterior, exposed to cable-bend-induced transients and lightning-induced surges. IC Role / Device Role / Timing Role: Final-stage protector before camera SoC power input, placed adjacent to connector. Use Value: Clamps 10×1000µs surges up to 51.4A within 1ns, preventing pixel corruption or sensor reset during transient events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional automotive TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC18C.TCT | Same VRWM (18V) and VC (29.2V), but lower PPK = 600W; SOD-123FL package, 1.2A IFSM | Limited to low-energy ESD-only use (e.g., USB data lines); unsuitable for ISO7637-2 Pulse 1/3a | Select only when space-constrained and surge energy is below 100mJ; verify waveform compliance per IEC61000-4-5 |
| TPSMD18C | Same SMC package and PPK (1500W), but higher VC = 32.4V @ IPP = 46.3A; non-AEC-Q101 | Acceptable for industrial automotive-adjacent systems but lacks PPAP documentation and IATF 16949 traceability | Use only in non-safety-critical aftermarket or commercial-vehicle designs where AEC-Q101 is not mandated |
Compared with SAC18C.TCT and TPSMD18C, SMCJ18CAQ-13-F uniquely delivers full ISO7637-2 compliance, AEC-Q101 qualification, and IATF 16949 manufacturing-making it the only choice for OEM ECU, BCM, and ADAS power rail protection requiring production-grade validation.
Availability
SMCJ18CAQ-13-F is available at Aetrix Electronics and suitable for engine control units, body control modules, and infotainment head units requiring stable component supply with full automotive qualification documentation and long-term lifecycle assurance.
Supply support for SMCJ18CAQ-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 ICs, with design centers in Asia, Europe, and the US, and manufacturing in IATF 16949-certified facilities.
The SMCJ series targets automotive power rail protection, engineered specifically to meet ISO7637-2 and ISO10605 requirements while supporting PPAP and change control for Tier 1 suppliers.
FAQ
What is the maximum clamping voltage of SMCJ18CAQ-13-F at its rated peak pulse current?
The maximum clamping voltage (VC) is 29.2V measured at 51.4A peak pulse current (IPP) under the standard 10×1000µs waveform. This value is guaranteed across -55°C to +150°C operating temperature and defines the upper voltage limit imposed on protected circuitry during surge events.
Is SMCJ18CAQ-13-F unidirectional or bidirectional, and how does that affect PCB layout?
SMCJ18CAQ-13-F is bidirectional, indicated by the "C" suffix. It has no polarity marking and functions identically in both directions, eliminating orientation constraints during placement and enabling protection of AC-coupled or floating nodes like LIN bus or differential sensor supplies without additional routing complexity.
Does this TVS diode require heatsinking for continuous operation?
No dedicated heatsink is required, but thermal performance depends on PCB copper area. At TL = +75°C, its steady-state power dissipation is 5.0W; achieving this requires ≥25 mm² of 2-ounce copper connected to both terminals. Derating applies above +75°C per Fig. 6 in DS40741 Rev. 8-2.
How does SMCJ18CAQ-13-F differ from industrial-grade SMCJ18A variants?
SMCJ18CAQ-13-F adds AEC-Q101 qualification, PPAP capability, IATF 16949 manufacturing, and extended temperature validation (-55°C to +150°C). Industrial SMCJ18A lacks automotive change control, traceability, and formal ESD/EMI test reports required for OEM production release.
SMCJ18CAQ-13-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-214AB, SMC
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 18V
- Voltage - Breakdown (Min):
- 20V
- Voltage - Clamping (Max) @ Ipp:
- 29.2V
- Current - Peak Pulse (10/1000µs):
- 51.4A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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:
- SMC
SMCJ18CAQ-13-F FAQ
1.How can I place an order for SMCJ18CAQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ18CAQ-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 SMCJ18CAQ-13-F reliable?
The price and inventory of SMCJ18CAQ-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 SMCJ18CAQ-13-F is usually 5 days.
3.What payment methods are accepted for SMCJ18CAQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ18CAQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ18CAQ-13-F?
SMCJ18CAQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ18CAQ-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 SMCJ18CAQ-13-F?
For technical support, including SMCJ18CAQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ18CAQ-13-F requirements.
6.How does Aetrix verify that SMCJ18CAQ-13-F is sourced from the original manufacturer or authorized distributors?
All SMCJ18CAQ-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 SMCJ18CAQ-13-F meets industry standards.
7.What is the process for return or replacement of SMCJ18CAQ-13-F?
All SMCJ18CAQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ18CAQ-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 SMCJ18CAQ-13-F part is unused and in its original packaging.
Return procedure for SMCJ18CAQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ18CAQ-13-F Tags
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