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Diodes Incorporated SMBJ33CAQ-13-F
- Part No.:
- SMBJ33CAQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ33CAQ-13-F.pdf
- Description:
- TVS DIODE 33VWM 53.3VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:90,603
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Product details
Overview
SMBJ33CAQ-13-F from Diodes Incorporated is a bi-directional automotive-grade transient voltage suppressor (TVS) diode in SMB package, rated for 600W peak pulse power, 33V reverse standoff voltage (VRWM), and 53.3V clamping voltage (VC) at 11.3A peak pulse current - designed to protect CAN, LIN, and sensor interfaces in 12V/24V vehicle subsystems against ISO7637-2 Pulse 1/2a/3a/3b transients and ISO10605 ESD events.
For engineers reviewing the SMBJ33CAQ-13-F datasheet, SMBJ33CAQ-13-F pinout, SMBJ33CAQ-13-F application, or SMBJ33CAQ-13-F equivalent, this device delivers AEC-Q101 qualified surge immunity with bi-directional clamping symmetry, RoHS-compliant matte tin terminations, and IATF 16949-manufactured traceability - critical for infotainment power rails, ADAS camera links, and body control module I/O protection.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, enabling robust protection of differential or AC-coupled automotive signal lines without polarity sensitivity. Its 33V VRWM aligns with nominal 24V system rails while maintaining margin above battery float voltage (≈28.5V), and its 53.3V VC ensures downstream ICs with 55–60V absolute maximum ratings remain within safe operating limits during ISO7637-2 Pulse 3b (+150V) events.
Thermal design leverages 5.0W steady-state dissipation at TL = +75°C and 4.8W/°C derating above +25°C ambient, supporting placement near high-power modules. The 100A IFSM rating supports repeated 8.3ms half-sine surges at ≤4 pulses/minute, meeting durability requirements for engine bay and chassis-mounted ECUs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600W - sustains single 10×1000μs transients up to 11.3A without failure |
| Reverse Standoff Voltage (VRWM) | 33V - blocks leakage & maintains signal integrity on 24V systems during normal operation |
| Clamping Voltage (VC) | 53.3V @ IPP = 11.3A - limits voltage seen by protected ICs below 55V ABS MAX threshold |
| Breakdown Voltage (VBR) | 36.7–40.6V @ IT = 1mA - defines sharp avalanche onset ensuring predictable clamping onset |
| Leakage Current (IR) | ≤0.5µA @ VRWM - negligible loading on low-power sensor bias networks |
| Operating Temperature | −55°C to +175°C - supports under-hood placement in engine control units and transmission controllers |
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; lead-free matte tin plating solderable per MIL-STD-202, Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Input terminal for negative transients | Conducts during reverse-biased surge events; forms symmetrical clamping path with Cathode |
| Cathode (Pin 2) | Input terminal for positive transients | Conducts during forward-biased surge events; paired with Anode for full bi-directional suppression |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use with PPAP capability and IATF 16949 manufacturing control |
| ISO10605 ESD compliance | Withstands ±30kV air/contact discharge - eliminates need for external ESD diodes on exposed connectors |
| ISO7637-2 transient immunity | Clamps Pulse 1 (−150V), Pulse 2a (+112V), Pulse 3a (−220V), Pulse 3b (+150V) within safe voltage windows |
| Bi-directional symmetry | Identical clamping performance for ± polarity surges - simplifies layout on differential buses like CAN FD |
Applications
| ADAS Camera Power Input | CAN FD Bus Termination |
|---|---|
|
Use Scenario: 12V supply line to 5MP rear-view camera module exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Primary overvoltage clamp protecting DC-DC converter input and image sensor power domain. Use Value: Limits transient excursions to ≤53.3V, preventing latch-up in buck controller ICs rated for 55V max input. |
Use Scenario: Protection of CAN FD transceiver I/O pins connected to chassis harness subject to ISO7637-2 Pulse 3a (−220V). IC Role / Device Role / Timing Role: Bi-directional clamping element placed directly at connector entry point before transceiver. Use Value: Maintains signal integrity by clamping within 1ns, with <0.5µA leakage preserving bus bias stability at 5Mbps. |
| Body Control Module LIN Bus | Electric Power Steering Sensor Interface |
|
Use Scenario: LIN slave node (e.g., door lock actuator) powered from vehicle battery with intermittent ground bounce. IC Role / Device Role / Timing Role: Secondary surge suppression stage after primary fuse, guarding LIN transceiver VCC and TX/RX pins. Use Value: Enables reliable operation under ISO7637-2 Pulse 2a (+112V) without disrupting 19.2kbps communication timing. |
Use Scenario: Analog voltage output from steering angle sensor routed through firewall into EPS ECU. IC Role / Device Role / Timing Role: Low-capacitance (<100pF) TVS on analog signal line to prevent ESD-induced ADC offset drift. Use Value: Adds <0.5µA leakage at 33V VRWM - no measurable impact on 0–5V ratiometric sensor scaling accuracy. |
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 |
|---|---|---|---|
| SAC33-2/TR13 | Same 33V VRWM, but 400W PPK rating and 58V VC @ 10A - lower surge capacity and higher clamping voltage | Limited to less severe transients (e.g., interior modules); not validated for ISO7637-2 Pulse 3a −220V | Select when cost sensitivity outweighs requirement for full 600W ISO7637-2 compliance |
| SMCJ33CA | Same electrical specs but SMC package (larger footprint, 1.5g weight) - higher thermal mass but incompatible with SMB-restricted PCB space | Suitable for under-dash ECUs with relaxed board area constraints; not viable for compact camera modules | Choose only if existing SMC footprint reuse is required and thermal margin >20% is available |
Compared with SAC33-2/TR13 and SMCJ33CA, SMBJ33CAQ-13-F uniquely balances AEC-Q101 validation, 600W surge handling, SMB footprint, and bi-directional symmetry - making it the optimal choice for space-constrained, high-reliability automotive signal and power line protection where ISO7637-2 Pulse 3a immunity is mandatory.
Availability
SMBJ33CAQ-13-F is available at Aetrix Electronics and suitable for automotive infotainment power rails, ADAS camera interfaces, and body control module LIN/CAN protection requiring stable component supply across multi-year production cycles.
Supply support for SMBJ33CAQ-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 ISO/TS 16949 and IATF 16949 certified facilities.
This device belongs to Diodes' AEC-Q101-qualified SMBJ-AQ automotive TVS family, engineered specifically to meet stringent ISO7637-2 and ISO10605 requirements for modern vehicle electronic subsystems.
FAQ
Is SMBJ33CAQ-13-F unidirectional or bidirectional?
SMBJ33CAQ-13-F is a bi-directional TVS diode, indicated by the "C" suffix in the part number. It provides symmetrical clamping for both positive and negative transients, making it ideal for protecting AC-coupled or differential signal lines such as CAN, LIN, and sensor outputs without polarity concerns.
What is the maximum clamping voltage under standard test conditions?
The maximum clamping voltage (VC) is 53.3V at a peak pulse current (IPP) of 11.3A, measured using the 10×1000μs waveform per Figure 4 of DS40740 Rev. 15-2. This value ensures protected downstream ICs remain within their absolute maximum voltage ratings during ISO7637-2 Pulse 3b (+150V) events.
Does this part meet AEC-Q101 stress testing requirements?
Yes - SMBJ33CAQ-13-F is explicitly AEC-Q101 qualified, PPAP capable, and manufactured in IATF 16949 certified facilities. Its qualification covers temperature cycling, humidity bias, mechanical shock, and ESD testing per the AEC-Q101 standard, confirming suitability for automotive under-hood and cabin applications.
Can SMBJ33CAQ-13-F replace SMBJ33A-13-F in an existing design?
No - SMBJ33A-13-F is unidirectional (no "C" suffix), while SMBJ33CAQ-13-F is bi-directional. Substituting without circuit review risks improper clamping during negative transients. Layout must verify symmetric placement and absence of polarity-dependent biasing before replacement.
SMBJ33CAQ-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):
- 33V
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 53.3V
- Current - Peak Pulse (10/1000µs):
- 11.3A
- 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
SMBJ33CAQ-13-F FAQ
1.How can I place an order for SMBJ33CAQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ33CAQ-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 SMBJ33CAQ-13-F reliable?
The price and inventory of SMBJ33CAQ-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 SMBJ33CAQ-13-F is usually 5 days.
3.What payment methods are accepted for SMBJ33CAQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ33CAQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ33CAQ-13-F?
SMBJ33CAQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ33CAQ-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 SMBJ33CAQ-13-F?
For technical support, including SMBJ33CAQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ33CAQ-13-F requirements.
6.How does Aetrix verify that SMBJ33CAQ-13-F is sourced from the original manufacturer or authorized distributors?
All SMBJ33CAQ-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 SMBJ33CAQ-13-F meets industry standards.
7.What is the process for return or replacement of SMBJ33CAQ-13-F?
All SMBJ33CAQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ33CAQ-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 SMBJ33CAQ-13-F part is unused and in its original packaging.
Return procedure for SMBJ33CAQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ33CAQ-13-F Tags
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Diodes Incorporated
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Diodes Incorporated
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