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Diodes Incorporated SMBJ20AQ-13-F
- Part No.:
- SMBJ20AQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ20AQ-13-F.pdf
- Description:
- TVS DIODE 20VWM 32.4VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:4,920
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Product details
Overview
SMBJ20AQ-13-F from Diodes Incorporated is a unidirectional 600W surface-mount automotive transient voltage suppressor (TVS) diode with 20V reverse standoff voltage, 32.4V max clamping voltage at 18.5A peak pulse current, and AEC-Q101 qualification for under-hood electronics. It protects CAN, LIN, and sensor interfaces against ISO7637-2 Pulse 1 (−150V), Pulse 2a (+112V), and ISO10605 ESD (±30kV).
For engineers reviewing the SMBJ20AQ-13-F datasheet, SMBJ20AQ-13-F pinout, SMBJ20AQ-13-F application, or SMBJ20AQ-13-F equivalent, this part delivers verified clamping performance in automotive power line and signal line surge protection where stable thermal derating to +175°C junction temperature and RoHS-compliant lead-free plating are required.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds 20V (VRWM), with breakdown occurring between 22.2V–24.5V at 1mA test current. Its 32.4V clamping voltage limits transients during 10×1000μs waveforms, sustaining up to 100A non-repetitive surge current per 8.3ms half-sine pulse.
Designed for IATF 16949-certified production, it features 5W steady-state power dissipation at TL = +75°C, 4.8W/°C derating above +25°C ambient, and operates across −55°C to +175°C junction temperature range - enabling deployment in engine control units, body control modules, and ADAS camera power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600W - sustains single 10×1000μs surges without failure in automotive load dump events |
| Reverse Standoff Voltage (VRWM) | 20.0V - blocks normal 12V/24V system voltages while remaining inactive until overvoltage occurs |
| Clamping Voltage (VC) | 32.4V @ IPP = 18.5A - limits downstream IC voltage to safe level during ISO7637-2 Pulse 1 and Pulse 2a transients |
| Breakdown Voltage (VBR) | 22.2V–24.5V @ IT = 1mA - defines precise avalanche onset threshold for predictable clamping behavior |
| Leakage Current (IR) | <0.5µA @ VRWM - ensures negligible standby power loss in always-on vehicle networks |
| Junction Temperature Range | −55°C to +175°C - supports direct mounting on high-temp PCB areas near power converters or motors |
| AEC-Q101 Qualified | Yes - validated for automotive use with PPAP capability and change-controlled manufacturing |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, molded plastic UL 94V-0 housing; weight ≈ 0.1g; moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; cathode-banded side is common reference | Connected to ground or low-impedance return path; enables unidirectional clamping from power rail to GND |
| Cathode | Current exit terminal in forward bias; marked by band on package top view | Connected to protected line (e.g., 12V supply or CAN_H); conducts surge current to ground during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| 600W peak pulse rating | Handles ISO7637-2 Pulse 1 (−150V/50Ω) without degradation, supporting robust front-end protection in 12V systems |
| 32.4V clamping at 18.5A | Keeps protected MCU I/O or transceiver VCC below absolute maximum ratings during fast transients |
| AEC-Q101 qualification & PPAP support | Meets automotive quality gate requirements for serial production, including stress testing and lot traceability |
| Lead-free, halogen-free, RoHS 3 compliant | Enables compliance with EU automotive environmental directives and end-of-life recycling mandates |
| −55°C to +175°C operation | Permits placement adjacent to heat-generating components (e.g., DC/DC converters) without thermal derating penalties |
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 exposed to load dump and alternator ripple. IC Role / Device Role: Unidirectional TVS placed between battery rail and input capacitor to clamp transients before LDO or DC/DC regulator. Use Value: Limits voltage excursion to ≤32.4V during ISO7637-2 Pulse 1 (−150V), preventing brownout or latch-up of 3.3V/5V logic supplies. |
Use Scenario: CAN FD data lines (CAN_H/CAN_L) in vehicle domain controllers subjected to ESD and coupled noise from nearby solenoids or motors. IC Role / Device Role: Paired SMBJ20AQ-13-F devices (one per line) referenced to chassis ground, clamping fast-rising ESD pulses. Use Value: Maintains signal integrity with <100pF typical capacitance at zero bias, avoiding bit error rate increase at 5Mbps CAN FD rates. |
| Body Control Module (BCM) Lighting Driver | ADAS Camera Power Rail |
|
Use Scenario: LED headlamp driver output stage switching 12V loads, generating inductive kickback during PWM dimming cycles. IC Role / Device Role: TVS mounted across MOSFET drain-source to absorb flyback energy and protect gate driver ICs. Use Value: Absorbs 600W peak energy from 8.3ms surges, eliminating need for snubber RC networks and reducing BOM count. |
Use Scenario: 5V or 12V power input to CMOS image sensor module in rear-view or surround-view cameras mounted near exhaust or engine bay. IC Role / Device Role: Primary overvoltage clamp on main power rail, upstream of filtering and LDO, ensuring continuous imaging during cranking dips and surges. Use Value: Operates reliably at +175°C TJ, surviving under-hood thermal cycling without parameter drift or premature wear-out. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional automotive TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20A-13-F (Diodes Inc.) | No AEC-Q101 qualification; same electrical specs but not PPAP-capable or manufactured in IATF 16949 facility | Suitable for non-automotive industrial or consumer designs where automotive reliability certification is not mandated | Select only if AEC-Q101 is not required; otherwise SMBJ20AQ-13-F ensures full automotive compliance. |
| SAC20-13-F (Diodes Inc.) | Same VRWM (20V) but lower 400W peak power; different package (SMA) with higher thermal resistance | Limited to lower-energy transients (e.g., ISO10605 only); unsuitable for ISO7637-2 Pulse 1 or load dump | Use only for cost-sensitive, non-critical signal-line ESD protection where 600W clamping is unnecessary. |
Compared with SMBJ20A-13-F, the "Q" suffix guarantees automotive-grade process control and traceability; compared with SAC20-13-F, SMBJ20AQ-13-F provides 50% higher surge energy handling and superior thermal performance in SMB package for under-hood deployment.
Availability
SMBJ20AQ-13-F is available at Aetrix Electronics and suitable for engine control units, CAN FD communication nodes, body control modules, and ADAS camera power systems requiring stable component supply with full automotive qualification and long-term lifecycle support.
Supply support for SMBJ20AQ-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 design, manufacturing, and test facilities certified to IATF 16949 and ISO 9001 standards.
This device belongs to the SMBJ-AQ automotive TVS series, engineered specifically for ISO7637-2 and ISO10605 compliance in harsh-temperature vehicle subsystems - emphasizing AEC-Q101 reliability, tight parametric distribution, and PPAP-ready documentation.
FAQ
What is the polarity configuration of SMBJ20AQ-13-F?
SMBJ20AQ-13-F is a unidirectional TVS diode, with cathode indicated by a band on the SMB package top surface. It conducts only when cathode voltage exceeds anode voltage by ≥22.2V, making it suitable for DC rail-to-ground clamping in 12V/24V automotive systems.
Does SMBJ20AQ-13-F meet ISO7637-2 Pulse 3b requirements?
Yes - its 32.4V clamping voltage at 18.5A and 600W peak power rating enable compliance with ISO7637-2 Pulse 3b (+150V, 50Ω source impedance), provided layout minimizes trace inductance and grounding impedance to maintain effective clamping response.
Can SMBJ20AQ-13-F be used in bi-directional signal lines like RS-485?
No - SMBJ20AQ-13-F is unidirectional only. For bi-directional data lines, use the bi-directional variant SMBJ20CAQ-13-F (with "C" suffix), which clamps symmetrically for ±20V standoff and protects both positive and negative transients on the same line.
What is the thermal resistance from junction to ambient for SMBJ20AQ-13-F?
While not explicitly specified in DS40740 Rev. 15–2, the SMB package exhibits typical RθJA ≈ 100°C/W on standard 1-inch² 1-oz copper pad. Derating follows the published curve: 5W at TL = +75°C, decreasing linearly to zero at +175°C case temperature.
SMBJ20AQ-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:
- 1
- Bidirectional Channels:
- -
- 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
SMBJ20AQ-13-F FAQ
1.How can I place an order for SMBJ20AQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ20AQ-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 SMBJ20AQ-13-F reliable?
The price and inventory of SMBJ20AQ-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 SMBJ20AQ-13-F is usually 5 days.
3.What payment methods are accepted for SMBJ20AQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ20AQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ20AQ-13-F?
SMBJ20AQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ20AQ-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 SMBJ20AQ-13-F?
For technical support, including SMBJ20AQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ20AQ-13-F requirements.
6.How does Aetrix verify that SMBJ20AQ-13-F is sourced from the original manufacturer or authorized distributors?
All SMBJ20AQ-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 SMBJ20AQ-13-F meets industry standards.
7.What is the process for return or replacement of SMBJ20AQ-13-F?
All SMBJ20AQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ20AQ-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 SMBJ20AQ-13-F part is unused and in its original packaging.
Return procedure for SMBJ20AQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ20AQ-13-F Tags
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Diodes Incorporated
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