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Diodes Incorporated 3.0SMCJ18CAQ-13
- Part No.:
- 3.0SMCJ18CAQ-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3.0SMCJ18CAQ-13.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PP
- Quantity:
- Payment:
- Shipping:
Inventory:9,904
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Product details
Overview
3.0SMCJ18CAQ-13 from Diodes Incorporated is a bi-directional automotive-grade transient voltage suppressor (TVS) diode designed for ISO7637-2 and ISO10605 surge/ESD protection in vehicle power line and signal interface circuits. It delivers 3000W peak pulse power, 18V reverse standoff voltage (VRWM), 29.2V max clamping voltage at 102.7A IPP, and operates from –55°C to +175°C.
For engineers reviewing the 3.0SMCJ18CAQ-13 datasheet, 3.0SMCJ18CAQ-13 pinout, 3.0SMCJ18CAQ-13 application, or 3.0SMCJ18CAQ-13 equivalent, key selection criteria include clamping performance under ISO7637-2 Pulse 1 (–150V), Pulse 3a (–220V), contact/air discharge ESD robustness (30kV), AEC-Q101 qualification, and SMC package thermal derating above +25°C.
Technical Context
This bi-directional TVS diode functions as a voltage-clamped shunt protector across sensitive automotive electronics-triggering conduction when transient voltage exceeds its 20.0–22.1V breakdown range (VBR @ IT = 1.0mA). Its low dynamic impedance ensures rapid energy diversion during 10×1000μs surges.
It meets stringent automotive reliability requirements: AEC-Q101 qualified, manufactured in IATF16949-certified facilities, PPAP-capable, and rated for 300A non-repetitive forward surge (8.3ms half-sine) with full thermal derating per Figure 1 up to +175°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 3000W - sustains single-event transients per ISO7637-2 without failure |
| Reverse Standoff Voltage (VRWM) | 18.0V - maximum continuous DC or RMS voltage before significant leakage |
| Breakdown Voltage (VBR) | 20.0–22.1V @ 1.0mA - precise conduction onset threshold for predictable clamping |
| Max Clamping Voltage (VC) | 29.2V @ 102.7A IPP - limits downstream voltage stress during worst-case 10×1000μs surge |
| Peak Pulse Current (IPP) | 102.7A - maximum transient current it safely shunts at rated clamping voltage |
| Operating Temperature | –55°C to +175°C - supports under-hood and powertrain module deployment |
| ESD Rating | ±30kV air/contact discharge per ISO10605 - eliminates need for external ESD diodes |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, molded plastic body with UL 94V-0 flammability rating, 0.21g weight, moisture sensitivity level 1 (J-STD-020).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode Band (Marked End) | Anode Terminal (Bi-directional) | Identifies terminal polarity; in bi-directional configuration, both ends function symmetrically as anode/cathode depending on transient polarity |
| Opposite End | Cathode Terminal (Bi-directional) | Second terminal completes bidirectional clamping path; no DC polarity dependency in circuit placement |
Key Features
| Feature | Design Value |
|---|---|
| 3000W Peak Pulse Power | Enables protection against high-energy ISO7637-2 Pulse 1 (–150V) and Pulse 3a (–220V) without thermal runaway |
| AEC-Q101 Qualified | Validated for automotive use with extended temperature cycling, HTRB, and mechanical shock testing per JESD47 |
| Bi-directional Clamping | Protects AC-coupled or floating lines (e.g., CAN, LIN, sensor outputs) from ± transients without polarity constraints |
| Lead-Free & Halogen-Free | RoHS 3 compliant (2015/863/EU); <900ppm Br, <900ppm Cl, <1000ppm Sb - meets global automotive environmental mandates |
| Low Clamping Ratio (VC/VBR) | 1.46 (29.2V / 20.0V) - minimizes overvoltage margin while maintaining robust surge handling |
Applications
| Engine Control Unit (ECU) Power Input | Automotive CAN Bus Interface |
|---|---|
Use Scenario: Protects 12V supply rail of engine control modules from load dump and alternator ripple transients. IC Role / Device Role: Primary shunt clamp on main VBAT input, placed upstream of DC-DC converters and microcontrollers. Use Value: Withstands ISO7637-2 Pulse 1 (–150V) and Pulse 2a (+112V) while limiting clamped voltage to ≤29.2V, preserving downstream 3.3V/5V logic rails. |
Use Scenario: Shields high-speed CAN FD transceivers from ESD events and coupled noise on differential bus lines. IC Role / Device Role: Bi-directional TVS placed across CANH–CANL pair, referenced to ground via low-inductance layout. Use Value: ±30kV ISO10605 ESD immunity prevents transceiver latch-up; 29.2V clamping avoids exceeding CANH absolute max rating (40V). |
| Body Control Module (BCM) Sensor Inputs | ADAS Camera Power Line |
Use Scenario: Guards analog inputs (e.g., temperature, pressure sensors) connected to BCM against battery reversal and jump-start spikes. IC Role / Device Role: Localized TVS at connector entry point, paired with series ferrite and RC filter. Use Value: 18V VRWM matches typical 12V system nominal; clamps Pulse 3b (+150V) to safe levels before signal conditioning amplifiers. |
Use Scenario: Secures 5V/12V power feed to surround-view camera modules exposed to harsh under-bumper environments. IC Role / Device Role: First-line transient suppressor on camera module PCB, mounted near power entry connector. Use Value: 175°C max junction temperature enables operation in sealed, thermally constrained housings; 3000W rating handles repeated road-induced surges. |
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 |
|---|---|---|---|
| SMBJ18CA | 2000W peak power, same VRWM (18V), higher VC (32.4V @ 62A), SMB package (smaller footprint, lower thermal mass) | Limited to lower-energy transients (e.g., ISO10605 only); unsuitable for ISO7637-2 Pulse 1 or 3a in high-current systems | Select when board space is constrained and surge energy is limited to ≤2000W; verify thermal margin under repeated pulses. |
| 1.5KE18CA | 1500W peak power, axial-leaded DO-201 package, higher IR (5µA @ VRWM), slower response due to lead inductance | Not AEC-Q101 qualified; unsuitable for automated SMT assembly or under-hood vibration environments | Use only in non-automotive, cost-sensitive industrial designs where manual assembly and lower surge immunity are acceptable. |
Compared with SMBJ18CA and 1.5KE18CA, the 3.0SMCJ18CAQ-13 provides 50% higher surge power headroom, AEC-Q101 validation for automotive production, and SMC package compatibility with high-volume reflow processes-making it the sole choice for safety-critical power line protection in modern ECUs and ADAS modules.
Availability
3.0SMCJ18CAQ-13 is available at Aetrix Electronics and suitable for automotive power distribution, CAN/LIN bus protection, body control module design, and ADAS camera power conditioning requiring stable component supply across multi-year vehicle production cycles.
Supply support for 3.0SMCJ18CAQ-13 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 with IATF16949-certified manufacturing.
This device belongs to Diodes' 3.0SMCJ(AQ) automotive TVS family, engineered specifically to meet ISO7637-2 and ISO10605 compliance requirements in AEC-Q101-qualified surface-mount packages for under-hood and chassis electronics.
FAQ
Is the 3.0SMCJ18CAQ-13 unidirectional or bi-directional?
The "C" suffix in 3.0SMCJ18CAQ-13 explicitly denotes bi-directional functionality, confirmed in Diodes' DS40742 datasheet Note 12. It clamps transients of either polarity across its terminals, making it suitable for AC-coupled interfaces like CAN, LIN, and differential sensor lines without polarity orientation concerns.
What is the maximum clamping voltage under ISO7637-2 Pulse 3a conditions?
Under the 10×1000μs waveform specified in ISO7637-2 Pulse 3a (–220V), the 3.0SMCJ18CAQ-13 clamps to 29.2V maximum at 102.7A peak pulse current (IPP), as measured per Figure 4 in DS40742. This value is guaranteed across –55°C to +175°C operating temperature.
Does this part require derating at elevated ambient temperatures?
Yes - the device must be derated linearly above +25°C ambient per Figure 1 in DS40742: at +125°C, peak pulse power drops to ~65% (1950W), and at +175°C, it falls to ~40% (1200W). Layout with ≥8.00mm² copper land area is required to achieve published IFSM and PPK ratings.
How is AEC-Q101 qualification verified for this TVS diode?
Diodes Incorporated validates the 3.0SMCJ18CAQ-13 per AEC-Q101-004 (TVS-specific stress test plan), including HTGB, HTRB, TCT, UHAST, and mechanical shock testing. Full qualification data, PPAP documentation, and IATF16949 facility certification are available upon request through Diodes' automotive support portal.
3.0SMCJ18CAQ-13 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):
- 102.7A
- Power - Peak Pulse:
- 3000W (3kW)
- 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
3.0SMCJ18CAQ-13 FAQ
1.How can I place an order for 3.0SMCJ18CAQ-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 3.0SMCJ18CAQ-13 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 3.0SMCJ18CAQ-13 reliable?
The price and inventory of 3.0SMCJ18CAQ-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3.0SMCJ18CAQ-13 is usually 5 days.
3.What payment methods are accepted for 3.0SMCJ18CAQ-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3.0SMCJ18CAQ-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3.0SMCJ18CAQ-13?
3.0SMCJ18CAQ-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3.0SMCJ18CAQ-13 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 3.0SMCJ18CAQ-13?
For technical support, including 3.0SMCJ18CAQ-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3.0SMCJ18CAQ-13 requirements.
6.How does Aetrix verify that 3.0SMCJ18CAQ-13 is sourced from the original manufacturer or authorized distributors?
All 3.0SMCJ18CAQ-13 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 3.0SMCJ18CAQ-13 meets industry standards.
7.What is the process for return or replacement of 3.0SMCJ18CAQ-13?
All 3.0SMCJ18CAQ-13 units undergo pre-shipment inspection (PSI). If there is an issue with 3.0SMCJ18CAQ-13, 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 3.0SMCJ18CAQ-13 part is unused and in its original packaging.
Return procedure for 3.0SMCJ18CAQ-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3.0SMCJ18CAQ-13 Tags
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