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Diodes Incorporated SMCJ18AQ-13-F
- Part No.:
- SMCJ18AQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ18AQ-13-F.pdf
- Description:
- TVS DIODE 18VWM 29.2VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:5,639
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Product details
Overview
SMCJ18AQ-13-F from Diodes Incorporated is an AEC-Q101-qualified unidirectional transient voltage suppressor (TVS) diode in SMC package, designed for automotive powerline protection. It features 18 V reverse standoff voltage (VRWM), 20.0–22.1 V breakdown voltage (VBR), 29.2 V max clamping voltage (VC) at 51.4 A peak pulse current (Ipp), and 3000 W peak pulse power (10/1000 µs). It protects ECUs in HVAC, ADAS, and infotainment systems against ISO 7637-2 pulses and ISO 10605 ESD events.
For engineers reviewing the SMCJ18AQ-13-F datasheet, SMCJ18AQ-13-F pinout, SMCJ18AQ-13-F application, or SMCJ18AQ-13-F equivalent, this device serves as a high-reliability, surface-mount TVS for automotive-grade surge suppression where clamping performance, low leakage (<5 µA @ VRWM), and load-dump robustness are critical selection criteria.
Technical Context
This unidirectional TVS operates as a shunt-clamping device across DC power rails to divert transient energy away from downstream ICs. Its silicon avalanche structure ensures precise breakdown onset and stable clamping under repetitive 10/1000 µs surges up to 3000 W.
Qualified per AEC-Q101 and compliant with ISO 7637-2 (Pulses 1, 2a, 2b, 3) and ISO 10605, it targets automotive electronic control units where failure modes must be mitigated without compromising baseline leakage or thermal stability under continuous 18 V bias.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Standoff Voltage (VRWM) | 18 V - Maximum continuous DC operating voltage before significant leakage begins; sets minimum system rail compatibility. |
| Breakdown Voltage (VBR) @ IT = 1 mA | 20.0–22.1 V - Confirmed avalanche initiation range; ensures predictable turn-on during transients. |
| Max Clamping Voltage (VC) @ Ipp = 51.4 A | 29.2 V - Peak voltage seen by protected circuit during worst-case 10/1000 µs surge; defines safe margin for 24 V automotive systems. |
| Peak Pulse Power (PPPM) | 3000 W - Sustained energy-handling capability per 10/1000 µs waveform; enables robust load-dump protection. |
| Max Reverse Leakage (IR) | <5 µA @ 18 V - Negligible standby current draw; avoids battery drain in always-on vehicle modules. |
| Package | SMC (DO-214AB) - Standardized surface-mount outline (5.59–6.22 mm × 6.60–7.11 mm × 2.75–3.18 mm); supports automated assembly and thermal dissipation via copper pad. |
Pinout & Package
SMCJ18AQ-13-F uses the standard SMC (DO-214AB) package: a two-terminal, surface-mount device with cathode band marking on one end. The package has no polarity-sensitive pins-only anode and cathode terminals defined by physical orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-impedance return path; completes clamping loop during transient events. |
| Cathode | High-side input terminal | Connected to protected line (e.g., battery rail); avalanche conduction initiates here when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive underhood and cabin environments including temperature cycling, humidity, and mechanical shock. |
| ISO 7637-2 compliance (Pulses 1, 2a, 2b, 3) | Guarantees survivability against real-world automotive transients including inductive switch-off and alternator load dump. |
| ISO 10605 ESD immunity | Withstands ±30 kV air discharge and ±30 kV contact discharge-meets full automotive ESD protection requirements. |
| 3000 W peak pulse power rating | Enables single-device protection of 12 V/24 V power rails without parallel staging or derating in most ECU designs. |
Applications
| ADAS Camera Module Protection | HVAC Blower Motor Control |
|---|---|
|
Use Scenario: Protecting image sensor and ISP power rails in rear-view or surround-view cameras exposed to battery transients during engine start-stop cycles. IC Role / Device Role: Unidirectional shunt TVS placed between 12 V supply and ground, clamping surges before they reach sensitive analog front-end and MIPI interface ICs. Use Value: Prevents latch-up or permanent damage to CMOS image sensors during ISO 7637-2 Pulse 2b (load dump) events up to 3000 W. |
Use Scenario: Safeguarding microcontroller and gate driver supplies in brushless DC blower motor controllers subjected to back-EMF spikes from motor commutation. IC Role / Device Role: Primary overvoltage clamp on main 12 V bus, absorbing inductive kickback from H-bridge switching and alternator regulation overshoot. Use Value: Maintains MCU reset integrity and MOSFET gate oxide safety by limiting rail voltage to ≤29.2 V during 51.4 A transient peaks. |
| Infotainment Head Unit Power Input | Body Control Module (BCM) CAN Interface Supply |
|
Use Scenario: Securing 5 V/3.3 V LDO inputs in head units connected directly to vehicle battery, vulnerable to jump-start surges and cold-crank recovery spikes. IC Role / Device Role: Front-end TVS on main input rail upstream of DC-DC converters, reducing stress on secondary regulators and PMICs. Use Value: Eliminates need for redundant TVS stages by delivering 3000 W clamping margin with <5 µA leakage at nominal 12 V operation. |
Use Scenario: Protecting isolated CAN transceiver VCC supply in BCMs where shared power domains expose communication ICs to coupled transients from lighting or window lift loads. IC Role / Device Role: Dedicated clamping device on CAN PHY power rail, decoupled from main ECU supply to prevent common-mode noise injection. Use Value: Ensures CAN bus uptime during ISO 7637-2 Pulse 1 (inductive load disconnect) by holding rail voltage below transceiver absolute maximum rating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMCJ18(C)AHM3/I | Same VRWM (18 V), VBR (20.0–22.1 V), VC (29.2 V), and SMC package; identical electrical specs but different tape-and-reel packaging (no -13-F suffix). | No functional difference; suitable for same PCB layouts and thermal profiles. | Select when standard reel packaging suffices and lead-free RoHS compliance is required without halogen-free certification. |
| SMCJ18(C)AHV6G | Identical electrical parameters and SMC package; differs only in moisture sensitivity level (MSL 1 vs MSL 3 for -13-F) and shipping packaging. | Same protection performance; may require different floor-life handling in SMT lines. | Choose for high-volume automated assembly where extended dry-pack shelf life is prioritized over halogen-free material compliance. |
Compared with SMCJ18AQ-13-F, both alternatives offer identical clamping behavior and surge ratings but differ in packaging format and process certifications-making them direct drop-in replacements where halogen-free or specific MSL requirements are not mandated.
Availability
SMCJ18AQ-13-F is available at Aetrix Electronics and suitable for automotive ADAS camera modules, HVAC blower controllers, and infotainment head units requiring stable component supply with full AEC-Q101 traceability and PPAP documentation support.
Supply support for SMCJ18AQ-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, with strong focus on automotive, industrial, and computing markets.
The SMCJ series belongs to Diodes' Automotive Grade TVS portfolio, engineered specifically to meet stringent ISO 7637-2 and AEC-Q101 requirements for powerline surge protection in modern vehicle ECUs.
FAQ
Is SMCJ18AQ-13-F unidirectional or bidirectional?
SMCJ18AQ-13-F is a unidirectional TVS diode, optimized for DC power rail protection where polarity is fixed. Its cathode connects to the protected line and anode to ground, enabling avalanche conduction only during positive transients above VBR. It does not conduct during negative excursions beyond VRWM.
What is the maximum operating temperature for SMCJ18AQ-13-F?
The device is rated for junction temperatures from –65 °C to +150 °C, consistent with AEC-Q101 requirements. At 150 °C ambient, derating applies: peak pulse power reduces to approximately 1800 W due to thermal resistance limitations of the SMC package and PCB layout.
Does SMCJ18AQ-13-F meet halogen-free and RoHS requirements?
Yes-SMCJ18AQ-13-F is certified RoHS-compliant and halogen-free per IEC 61249-2-21, as indicated by the "-F" suffix in the part number. This ensures compliance with automotive environmental standards including ELV and IMDS reporting requirements.
Can SMCJ18AQ-13-F replace SMAJ18AQ in existing designs?
No-SMCJ18AQ-13-F uses the larger SMC (DO-214AB) package versus SMAJ's smaller SMA (DO-214AC), resulting in different footprint, thermal mass, and 3000 W vs 400 W peak power capability. Direct replacement requires PCB redesign and thermal validation; it is not a drop-in upgrade.
SMCJ18AQ-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:
- 1
- Bidirectional Channels:
- -
- 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
SMCJ18AQ-13-F FAQ
1.How can I place an order for SMCJ18AQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ18AQ-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 SMCJ18AQ-13-F reliable?
The price and inventory of SMCJ18AQ-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 SMCJ18AQ-13-F is usually 5 days.
3.What payment methods are accepted for SMCJ18AQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ18AQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ18AQ-13-F?
SMCJ18AQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ18AQ-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 SMCJ18AQ-13-F?
For technical support, including SMCJ18AQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ18AQ-13-F requirements.
6.How does Aetrix verify that SMCJ18AQ-13-F is sourced from the original manufacturer or authorized distributors?
All SMCJ18AQ-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 SMCJ18AQ-13-F meets industry standards.
7.What is the process for return or replacement of SMCJ18AQ-13-F?
All SMCJ18AQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ18AQ-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 SMCJ18AQ-13-F part is unused and in its original packaging.
Return procedure for SMCJ18AQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ18AQ-13-F Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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onsemi
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D5V0H1B2LP-7B
Diodes Incorporated
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Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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