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Diodes Incorporated 3.0SMCJ12CAQ-13
- Part No.:
- 3.0SMCJ12CAQ-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3.0SMCJ12CAQ-13.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PP
- Quantity:
- Payment:
- Shipping:
Inventory:5,548
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Product details
Overview
3.0SMCJ12CAQ-13 from Diodes Incorporated is a bi-directional automotive-grade transient voltage suppressor (TVS) diode in SMC package, rated for 3000W peak pulse power, 12V reverse standoff voltage (VRWM), and 19.9V max clamping voltage (VC) at 150.8A peak pulse current. It protects CAN, LIN, and power-line circuits in engine control units and body electronics against ISO7637-2 Pulse 1/2a/3a/3b and ISO10605 ESD surges.
For engineers reviewing the 3.0SMCJ12CAQ-13 datasheet, 3.0SMCJ12CAQ-13 pinout, 3.0SMCJ12CAQ-13 application, or 3.0SMCJ12CAQ-13 equivalent, this AEC-Q101 qualified TVS offers verified clamping performance under 10×1000μs surge waveforms, IATF16949-manufactured traceability, and RoHS/halogen-free compliance for automotive Tier-1 design-in.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, enabling protection of AC-coupled or floating signal lines without polarity constraints. Its 12V VRWM ensures compatibility with 12V automotive battery systems while maintaining low leakage (<2µA) and fast response to transients exceeding 100V/ns.
The device uses silicon avalanche junction technology to achieve sub-nanosecond response time and stable clamping over -55°C to +175°C junction temperature range. Its 3000W rating is validated per 8.3ms half-sine and 10×1000μs waveforms, with thermal derating defined up to +175°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 3000W - sustains single 10×1000μs surges up to 150.8A without failure |
| Reverse Standoff Voltage (VRWM) | 12.0V - maximum continuous DC or RMS voltage before significant leakage |
| Max Clamping Voltage (VC) | 19.9V @ IPP = 150.8A - limits downstream IC voltage stress during ISO7637-2 Pulse 1 (-150V) |
| Breakdown Voltage (VBR) | 13.3–14.7V @ IT = 1.0mA - defines precise avalanche initiation threshold for predictable triggering |
| Peak Forward Surge Current (IFSM) | 300A @ 8.3ms - supports high-energy load dump events in alternator-regulated systems |
| Operating Temperature | -55°C to +175°C - enables placement near engines, transmissions, and under-hood ECUs |
| AEC-Q101 Qualified | Yes - certified for automotive use with PPAP documentation and change control |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, molded plastic body with UL 94V-0 flammability rating; moisture sensitivity level 1 per J-STD-020; weight ≈ 0.21g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode Band (Marked End) | Anode for bi-directional operation | Identifies terminal polarity; in bi-directional configuration, both ends function as symmetrical avalanche junctions |
| Opposite Terminal | Cathode for bi-directional operation | Provides identical clamping behavior in reverse bias; no functional distinction between terminals in C-suffix parts |
Key Features
| Feature | Design Value |
|---|---|
| 3000W Peak Pulse Power | Enables robust protection against severe load dump and ISO7637-2 Pulse 1 (−150V) without derating in standard PCB layouts |
| Bi-directional Symmetry | Eliminates polarity concerns on differential buses (e.g., CAN H/L) and AC-coupled sensors, reducing BOM count |
| AEC-Q101 Qualification | Validated for automotive use with temperature cycling, humidity testing, and mechanical shock per automotive reliability standards |
| RoHS & Halogen-Free | Meets EU RoHS 3 (2015/863/EU) and Diodes' "Green" definition (<900ppm Br, <900ppm Cl, <1000ppm Sb) |
| Low Clamping Ratio | VC/VRWM = 1.66 - minimizes overvoltage stress on protected 12V logic and transceivers during surge events |
Applications
| Engine Control Unit (ECU) Power Input | CAN FD Transceiver Protection |
|---|---|
|
Use Scenario: 12V battery feed to microcontroller power supply in gasoline/diesel engine management systems. IC Role / Device Role / Timing Role: Primary overvoltage clamp during load dump (ISO7637-2 Pulse 5a) and alternator regulation faults. Use Value: Limits input rail to ≤19.9V during 300A surge, preventing LDO dropout and MCU brownout in critical timing windows. |
Use Scenario: Bidirectional protection of CAN FD physical layer (e.g., TCAN1042-Q1) in ADAS domain controllers. IC Role / Device Role / Timing Role: Fast-clamping element on CAN_H and CAN_L lines against ESD (ISO10605 ±30kV) and coupled transients. Use Value: Maintains signal integrity below 1V differential overshoot during 10×1000μs pulses, preserving bit error rate <10⁻¹². |
| Body Control Module (BCM) LIN Bus | Electric Power Steering (EPS) Motor Driver |
|
Use Scenario: LIN bus termination point in door module or lighting control unit exposed to harness-induced transients. IC Role / Device Role / Timing Role: Low-capacitance (<50pF typical), bi-directional clamp on LIN data line referenced to chassis ground. Use Value: Prevents LIN transceiver latch-up during ISO7637-2 Pulse 3b (+150V) while adding <0.5ns propagation delay to 19.2kbps signaling. |
Use Scenario: High-side gate driver supply rail protection in 3-phase EPS motor inverters operating at 12V nominal. IC Role / Device Role / Timing Role: Secondary surge suppression stage after bulk TVS, handling repetitive switching-induced spikes. Use Value: Withstands ≥10⁴ pulses at 50% PPK rating, extending gate driver IC lifetime under real-world road vibration and EMI stress. |
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 |
|---|---|---|---|
| SMBJ12CA | 2000W PPK, same VRWM (12V), higher VC (21.2V), SMB package (smaller footprint, lower thermal mass) | Limited to lower-energy transients (e.g., ISO10605 only); unsuitable for ISO7637-2 Pulse 1 load dump | Select when board space is constrained and surge energy does not exceed 2000W |
| 1.5KE12CA | 1500W PPK, axial leaded DO-201 package, higher IR (5µA), slower response due to lead inductance | Not AEC-Q101 qualified; requires through-hole mounting; incompatible with automated SMT assembly | Select only for legacy industrial designs where AEC-Q101 and SMT are not required |
Compared with SMBJ12CA and 1.5KE12CA, the 3.0SMCJ12CAQ-13 delivers 50% higher surge capacity than SMBJ-class devices and full automotive qualification absent in legacy axial parts-making it the only choice for new ECU, BCM, and ADAS designs requiring ISO7637-2 compliance and SMT manufacturability.
Availability
3.0SMCJ12CAQ-13 is available at Aetrix Electronics and suitable for engine control units, CAN FD networks, body control modules, and electric power steering systems requiring stable component supply across multi-year automotive production cycles.
Supply support for 3.0SMCJ12CAQ-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 facilities.
This device belongs to Diodes' AEC-Q101-qualified 3.0SMCJ series, engineered specifically for automotive transient suppression in 12V/24V systems compliant with ISO7637-2 and ISO10605, with emphasis on under-hood thermal resilience and PPAP-ready documentation.
FAQ
Is 3.0SMCJ12CAQ-13 unidirectional or bidirectional?
It is bi-directional, as indicated by the "C" suffix in the part number. Both terminals behave identically under positive and negative transients, making it ideal for protecting differential buses like CAN or AC-coupled signals without polarity concerns. The marking band denotes one terminal but does not imply unidirectional operation.
What is the maximum clamping voltage at 100A peak pulse current?
Per the datasheet's Figure 4 and electrical characteristics table, the max clamping voltage is 19.9V at 150.8A. At 100A, VC is approximately 18.3V (interpolated from the 10×1000μs waveform curve), ensuring downstream 12V logic remains within safe operating limits during typical ESD and coupled transients.
Does this TVS require a heatsink for 3000W surge dissipation?
No external heatsink is required. The 3000W rating applies to non-repetitive 10×1000μs pulses; thermal energy is dissipated into the PCB copper via the SMC package's low thermal resistance (junction-to-board ≈ 15°C/W). Standard 8mm² copper pads meet the datasheet's mounting requirement for full power rating.
How does AEC-Q101 qualification impact design validation?
AEC-Q101 qualification confirms the device has passed accelerated stress tests including temperature cycling, high-temperature operating life, and ESD robustness-reducing need for redundant qualification at system level. It mandates PPAP documentation, lot traceability, and controlled change notification, directly supporting IATF16949-compliant automotive production.
3.0SMCJ12CAQ-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):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 19.9V
- Current - Peak Pulse (10/1000µs):
- 150.8A
- 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
3.0SMCJ12CAQ-13 FAQ
1.How can I place an order for 3.0SMCJ12CAQ-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 3.0SMCJ12CAQ-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 3.0SMCJ12CAQ-13 reliable?
The price and inventory of 3.0SMCJ12CAQ-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3.0SMCJ12CAQ-13 is usually 5 days.
3.What payment methods are accepted for 3.0SMCJ12CAQ-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3.0SMCJ12CAQ-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3.0SMCJ12CAQ-13?
3.0SMCJ12CAQ-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3.0SMCJ12CAQ-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 3.0SMCJ12CAQ-13?
For technical support, including 3.0SMCJ12CAQ-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3.0SMCJ12CAQ-13 requirements.
6.How does Aetrix verify that 3.0SMCJ12CAQ-13 is sourced from the original manufacturer or authorized distributors?
All 3.0SMCJ12CAQ-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 3.0SMCJ12CAQ-13 meets industry standards.
7.What is the process for return or replacement of 3.0SMCJ12CAQ-13?
All 3.0SMCJ12CAQ-13 units undergo pre-shipment inspection (PSI). If there is an issue with 3.0SMCJ12CAQ-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 3.0SMCJ12CAQ-13 part is unused and in its original packaging.
Return procedure for 3.0SMCJ12CAQ-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3.0SMCJ12CAQ-13 Tags
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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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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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