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Diodes Incorporated SMBJ20CAQ-13-F
- Part No.:
- SMBJ20CAQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ20CAQ-13-F.pdf
- Description:
- TVS DIODE 20VWM 32.4VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:19,588
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Product details
Overview
SMBJ20CAQ-13-F from Diodes Incorporated is a bi-directional 600W surface-mount transient voltage suppressor (TVS) designed for automotive power line protection. It features a 20V reverse standoff voltage (VRWM), 32.4V max clamping voltage at 18.5A peak pulse current, and AEC-Q101 qualification for under-hood applications including engine control units and body electronics exposed to ISO7637-2 Pulse 1/2a/3a/3b transients.
For engineers reviewing the SMBJ20CAQ-13-F datasheet, SMBJ20CAQ-13-F pinout, SMBJ20CAQ-13-F application, or SMBJ20CAQ-13-F equivalent, key selection criteria include clamping voltage margin relative to system rail, IEC/ISO surge compliance level, unidirectional vs. bidirectional polarity requirement, thermal derating above +25°C, and tape-and-reel packaging compatibility with SMT assembly lines.
Technical Context
This bi-directional TVS diode operates symmetrically across both polarities, enabling protection of AC-coupled or floating signal/power lines without polarity constraints. Its 600W peak pulse power rating is validated per 10×1000μs waveform, with clamping performance specified at IPP = 18.5A and VC = 32.4V - ensuring robust suppression of ISO7637-2 Pulse 3b (+150V) and ISO10605 ESD events.
Thermal design requires attention to steady-state dissipation limits: PM(AV) = 5.0W at TL = +75°C, with linear derating of 4.8W/°C above +25°C ambient. The device supports operation from –55°C to +175°C junction temperature, meeting automotive under-hood thermal requirements without external heatsinking in typical PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600W - sustains single 10×1000μs transients up to 18.5A without failure |
| Reverse Standoff Voltage | 20V - maximum continuous DC or RMS voltage before significant leakage |
| Max Clamping Voltage | 32.4V @ IPP = 18.5A - limits downstream IC voltage stress during surge events |
| Breakdown Voltage | 22.2–24.5V @ IT = 1mA - ensures reliable turn-on before system overvoltage damage |
| Leakage Current | <0.5µA @ VRWM - negligible standby power loss in always-on automotive modules |
| Operating Temperature | –55°C to +175°C - qualified for direct mounting on engine control unit PCBs |
| AEC-Q101 Qualified | Yes - certified for automotive use with PPAP documentation and IATF 16949 manufacturing |
Pinout & Package
Package: SMB (DO-214AA), surface-mount plastic package with matte tin-plated terminals, moisture sensitivity level 1, weight ≈0.1g. UL 94V-0 rated mold compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point (positive surge) | Connects to protected line; conducts during positive transients |
| Cathode | Current exit point (positive surge) | Connects to ground or return path; completes conduction loop |
| Bi-directional terminals | Surge conduction in both polarities | No polarity marking - symmetrical clamping for AC or floating rails |
Key Features
| Feature | Design Value |
|---|---|
| 600W peak pulse power | Enables single-device protection against ISO7637-2 Pulse 1 (–150V) and Pulse 3b (+150V) without parallel staging |
| Bi-directional architecture | Eliminates need for polarity-aware layout; protects differential buses like LIN or sensor outputs |
| AEC-Q101 qualification | Validated reliability for automotive safety-critical systems requiring zero field failures over 15-year service life |
| RoHS 3 & Halogen-free | Complies with EU Directive 2015/863/EU and Diodes' "Green" definition (<900ppm Br/Cl, <1000ppm Sb) |
Applications
| Engine Control Unit (ECU) Power Input | Body Control Module (BCM) CAN Bus Lines |
|---|---|
Use Scenario: Protects 12V supply rail of engine ECU against load dump and alternator ripple. IC Role / Device Role / Timing Role: Primary overvoltage clamp during ISO7637-2 Pulse 2a (+112V) and Pulse 5a (load dump). Use Value: Limits rail voltage to ≤32.4V, preventing damage to MCU, LDOs, and gate drivers downstream. | Use Scenario: Shields high-speed CAN FD transceivers from ESD and coupled transients on vehicle wiring harnesses. IC Role / Device Role / Timing Role: Bi-directional clamping element placed between CANH/CANL and chassis ground. Use Value: Maintains signal integrity by clamping ±30kV contact discharge (ISO10605) without adding capacitance that degrades bit rate. |
| Advanced Driver Assistance Systems (ADAS) Camera Power | Electric Power Steering (EPS) Motor Driver Inputs |
Use Scenario: Safeguards 5V/12V camera module power input from battery transients during cold cranking. IC Role / Device Role / Timing Role: First-line transient suppressor upstream of DC-DC converter and image sensor. Use Value: Prevents latch-up or permanent damage to CMOS image sensors during –220V ISO7637-2 Pulse 3a events. | Use Scenario: Protects H-bridge gate driver ICs from inductive kickback during EPS motor commutation. IC Role / Device Role / Timing Role: Snubber-grade TVS placed across motor phase inputs to absorb flyback energy. Use Value: Absorbs 600W surges without degradation, extending gate driver lifetime in high-cycle steering actuation. |
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 |
|---|---|---|---|
| SMBJ20CA | Same electrical specs; non-AEC-Q101, standard commercial grade | Not approved for automotive production; limited to prototyping or non-safety systems | Select only for cost-sensitive non-automotive designs where AEC-Q101 is not mandated |
| SMCJ20CAQ-13-F | Same VRWM/VC but higher 1500W PPK rating in larger SMC package | Used where higher surge repetition rate or longer pulse duration is required | Choose when system-level testing shows 600W insufficient for worst-case load dump scenarios |
Compared with SMBJ20CA and SMCJ20CAQ-13-F, the SMBJ20CAQ-13-F uniquely balances AEC-Q101 compliance, SMB footprint constraints, and 600W surge capacity - making it optimal for space-constrained automotive ECUs where qualification and reliability are mandatory.
Availability
SMBJ20CAQ-13-F is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera systems, and electric power steering controllers requiring stable component supply across multi-year automotive production programs.
Supply support for SMBJ20CAQ-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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability components for automotive, industrial, and computing markets.
The SMBJ(AQ) series is engineered specifically for automotive transient suppression, delivering AEC-Q101-qualified TVS diodes optimized for ISO7637-2 and ISO10605 compliance in compact SMB packages.
FAQ
What does the 'C' suffix in SMBJ20CAQ-13-F indicate?
The 'C' denotes bi-directional configuration, meaning the device provides symmetrical clamping for both positive and negative transients without polarity dependence. This differs from uni-directional variants (e.g., SMBJ20AQ-13-F) which require correct anode/cathode orientation and only clamp one polarity. Bi-directional operation is essential for protecting AC-coupled lines like CAN or LIN buses.
How does SMBJ20CAQ-13-F meet ISO7637-2 Pulse 3a requirements?
SMBJ20CAQ-13-F clamps to 32.4V at 18.5A, well below the –220V amplitude of ISO7637-2 Pulse 3a. When placed across a 12V rail with appropriate series impedance, it limits voltage excursion to safe levels for downstream ICs. Its 600W rating ensures single-pulse survivability, and its –55°C to +175°C operating range maintains performance during cold-cranking and under-hood thermal stress.
Is SMBJ20CAQ-13-F compatible with lead-free reflow soldering processes?
Yes - it features matte tin-plated terminals compliant with MIL-STD-202, Method 208, and is rated for standard Pb-free reflow profiles (JEDEC J-STD-020). The SMB package has moisture sensitivity level 1, eliminating bake requirements prior to assembly. Its UL 94V-0 mold compound withstands peak temperatures up to 260°C for 10 seconds without delamination or parametric shift.
What is the significance of the 'AQ' suffix in the part number?
The 'AQ' suffix indicates AEC-Q101 qualification, PPAP capability, and manufacturing in IATF 16949-certified facilities. This distinguishes it from standard-grade equivalents (e.g., SMBJ20CA-13-F) and confirms full automotive traceability, process control, and reliability validation - including HTOL, TC, UHAST, and ESD testing per AEC standards.
SMBJ20CAQ-13-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-214AA, SMB
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 20V
- Voltage - Breakdown (Min):
- 22.2V
- Voltage - Clamping (Max) @ Ipp:
- 32.4V
- Current - Peak Pulse (10/1000µs):
- 18.5A
- Power - Peak Pulse:
- 600W
- 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:
- SMB
SMBJ20CAQ-13-F FAQ
1.How can I place an order for SMBJ20CAQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ20CAQ-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 SMBJ20CAQ-13-F reliable?
The price and inventory of SMBJ20CAQ-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 SMBJ20CAQ-13-F is usually 5 days.
3.What payment methods are accepted for SMBJ20CAQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ20CAQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ20CAQ-13-F?
SMBJ20CAQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ20CAQ-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 SMBJ20CAQ-13-F?
For technical support, including SMBJ20CAQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ20CAQ-13-F requirements.
6.How does Aetrix verify that SMBJ20CAQ-13-F is sourced from the original manufacturer or authorized distributors?
All SMBJ20CAQ-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 SMBJ20CAQ-13-F meets industry standards.
7.What is the process for return or replacement of SMBJ20CAQ-13-F?
All SMBJ20CAQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ20CAQ-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 SMBJ20CAQ-13-F part is unused and in its original packaging.
Return procedure for SMBJ20CAQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ20CAQ-13-F Tags
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