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Diodes Incorporated SMBJ40CAQ-13-F
- Part No.:
- SMBJ40CAQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ40CAQ-13-F.pdf
- Description:
- TVS DIODE 40VWM 64.5VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:15,675
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Product details
Overview
SMBJ40CAQ-13-F from Diodes Incorporated is a bi-directional 40V standoff, 600W peak pulse power automotive TVS diode in SMB package, designed to clamp transient overvoltages on dual-polarity signal/power lines in engine control units, infotainment interfaces, and CAN transceiver protection circuits per ISO7637-2 Pulse 1/2a/3a/3b and ISO10605 ESD requirements.
For engineers reviewing the SMBJ40CAQ-13-F datasheet, SMBJ40CAQ-13-F pinout, SMBJ40CAQ-13-F application, or SMBJ40CAQ-13-F equivalent, this part supports AEC-Q101 qualification, IATF 16949 manufacturing, PPAP readiness, and RoHS/halogen-free compliance - critical for Tier-1 automotive design-in and long-term supply continuity.
Technical Context
This bi-directional TVS operates symmetrically across both polarities with a 40V reverse standoff voltage (VRWM), 44.4V minimum breakdown voltage (VBR) at 1mA, and clamps to ≤64.5V at 9.3A peak pulse current (IPP) under 10×1000μs waveform. It delivers 600W non-repetitive surge suppression with 4.8W/°C derating above +25°C ambient.
Rated for -55°C to +175°C junction temperature, it sustains 100A 8.3ms half-sine forward surge (IFSM), exhibits ≤0.5μA reverse leakage at VRWM, and features ultra-low thermal resistance due to SMB package construction with matte tin-plated leads and UL 94V-0 molded plastic body.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600W - withstands ISO7637-2 Pulse 3b (+150V) and ISO10605 ±30kV ESD events without failure |
| Reverse Standoff Voltage | 40V - sets clamping threshold for 12V/24V automotive bus protection without false triggering |
| Clamping Voltage @ IPP | 64.5V max @ 9.3A - limits downstream IC voltage stress during 10×1000μs transients |
| Breakdown Voltage | 44.4–49.1V min/max @ 1mA - ensures reliable turn-on margin above VRWM for robust surge response |
| Operating Temperature | -55°C to +175°C - supports under-hood placement in ECU, transmission control, and ADAS sensor modules |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including HTOL, TCT, and ESD testing per AEC specification |
Pinout & Package
Package: SMB surface-mount package (3.30–3.94mm × 5.00–5.59mm × 2.00–2.50mm height), UL 94V-0 molded plastic, matte tin-plated terminals, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Input terminal for negative polarity surge | Accepts reverse-biased transients; forms symmetrical clamping path with Cathode |
| Cathode (Pin 2) | Input terminal for positive polarity surge | Accepts forward-biased transients; enables bidirectional clamping without external polarity logic |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping architecture | Eliminates need for dual-diode configurations in differential or AC-coupled lines (e.g., LIN, CAN FD, sensor bridges) |
| 600W peak pulse rating | Meets ISO7637-2 Pulse 3a (-220V) and Pulse 3b (+150V) energy thresholds for 12V systems |
| AEC-Q101 qualification & PPAP capability | Enables direct integration into OEM BOMs with full change control documentation and process validation records |
| Halogen- and antimony-free "Green" construction | Complies with EU RoHS 3 (2015/863/EU) and automotive sustainability mandates (<900ppm Br/Cl, <1000ppm Sb) |
Applications
| Engine Control Unit (ECU) Power Input | CAN Transceiver Bus Protection |
|---|---|
Use Scenario: Protects 12V main power rail of gasoline/diesel ECUs against load dump and alternator ripple. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed upstream of DC-DC converters and microcontroller power supplies. Use Value: Clamps 150V ISO7637-2 Pulse 3b transients to ≤64.5V, preventing brownout or latch-up in 5V/3.3V logic domains. | Use Scenario: Shields high-speed CAN FD physical layer transceivers from ESD and coupled noise on differential bus lines. IC Role / Device Role / Timing Role: Bi-directional transient suppressor mounted directly at connector interface before common-mode choke. Use Value: Maintains signal integrity by limiting bus voltage excursions to <±65V during ±30kV contact discharge (ISO10605), preserving bit error rate. |
| Infotainment Display Interface | ADAS Camera Power Line |
Use Scenario: Guards LVDS or FPD-Link III video data lines between head unit and central display against hot-swap and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance bi-directional TVS placed adjacent to connector pins to minimize stub length. Use Value: Provides sub-100pF typical capacitance (per Fig. 2) while clamping ±30kV ESD to safe levels, avoiding pixel corruption or frame drop. | Use Scenario: Safeguards 12V power input to radar/camera modules exposed to under-hood surges and vibration-induced arcing. IC Role / Device Role / Timing Role: First-line transient defense before buck converter and image sensor power management IC. Use Value: Withstands -220V ISO7637-2 Pulse 3a and +112V Pulse 2a without degradation, ensuring continuous operation in ASIL-B systems. |
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 |
|---|---|---|---|
| SMBJ40CDICT-ND (Mouser) | Same VRWM (40V), identical SMB package, but rated for 150°C max TJ (vs. 175°C) | Limited to cabin modules; not qualified for under-hood use above 150°C ambient | Select only if operating temperature stays below 150°C and AEC-Q101 requalification is not required |
| TPSMD40CA (Texas Instruments) | 40V VRWM, 600W rating, but higher clamping voltage (67V vs. 64.5V) and no AEC-Q101 documentation | Requires additional qualification effort for automotive production; lacks PPAP support | Use only for prototyping or non-OEM industrial designs where full automotive certification is waived |
Compared with SMBJ40CAQ-13-F, the Mouser alternative sacrifices under-hood thermal margin, while the TI part lacks documented AEC-Q101 validation and has looser clamping - making the Diodes part the only fully production-ready option for certified automotive programs.
Availability
SMBJ40CAQ-13-F is available at Aetrix Electronics and suitable for engine control units, CAN FD bus protection, and ADAS camera power line designs requiring stable component supply, long-lifecycle support, and full automotive qualification traceability.
Supply support for SMBJ40CAQ-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 with over 50 years of power management expertise.
The SMBJ(AQ) series is engineered specifically for automotive transient suppression, combining AEC-Q101 qualification, IATF 16949 process control, and optimized clamping performance for ISO7637-2 and ISO10605 compliance in safety-critical vehicle subsystems.
FAQ
What is the maximum clamping voltage for SMBJ40CAQ-13-F at its rated peak pulse current?
The maximum clamping voltage (VC) is 64.5V at 9.3A peak pulse current (IPP), measured using the standardized 10×1000μs double-exponential waveform per REA definition. This value is guaranteed across the full -55°C to +175°C operating temperature range and ensures downstream ICs remain within absolute maximum ratings during surge events.
Is SMBJ40CAQ-13-F unidirectional or bidirectional, and how does that affect circuit placement?
SMBJ40CAQ-13-F is bi-directional, indicated by the "C" suffix and absence of cathode band marking. It protects both positive and negative polarity transients on the same line without polarity-sensitive orientation, enabling simplified layout on differential buses like CAN or LIN and eliminating risk of incorrect installation during assembly.
Does SMBJ40CAQ-13-F meet AEC-Q101 requirements for automotive use?
Yes - SMBJ40CAQ-13-F is fully AEC-Q101 qualified, manufactured in IATF 16949-certified facilities, and PPAP-capable. Test reports cover HTOL, temperature cycling, ESD (HBM/MM), and surge endurance per AEC-Q101 Rev D, with full documentation available upon request for OEM release approval.
What is the steady-state power dissipation rating and thermal derating behavior?
The steady-state power dissipation (PM(AV)) is 5.0W at TL = +75°C. Derating follows a linear 4.8W/°C slope above +25°C ambient, reaching zero at approximately +135°C ambient - a key constraint when mounting near heat sources like power MOSFETs or DC-DC inductors in compact ECU enclosures.
SMBJ40CAQ-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):
- 40V
- Voltage - Breakdown (Min):
- 44.4V
- Voltage - Clamping (Max) @ Ipp:
- 64.5V
- Current - Peak Pulse (10/1000µs):
- 9.3A
- 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
SMBJ40CAQ-13-F FAQ
1.How can I place an order for SMBJ40CAQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ40CAQ-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 SMBJ40CAQ-13-F reliable?
The price and inventory of SMBJ40CAQ-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 SMBJ40CAQ-13-F is usually 5 days.
3.What payment methods are accepted for SMBJ40CAQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ40CAQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ40CAQ-13-F?
SMBJ40CAQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ40CAQ-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 SMBJ40CAQ-13-F?
For technical support, including SMBJ40CAQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ40CAQ-13-F requirements.
6.How does Aetrix verify that SMBJ40CAQ-13-F is sourced from the original manufacturer or authorized distributors?
All SMBJ40CAQ-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 SMBJ40CAQ-13-F meets industry standards.
7.What is the process for return or replacement of SMBJ40CAQ-13-F?
All SMBJ40CAQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ40CAQ-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 SMBJ40CAQ-13-F part is unused and in its original packaging.
Return procedure for SMBJ40CAQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ40CAQ-13-F Tags
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Diodes Incorporated
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