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Diodes Incorporated SMBJ28CAQ-13-F
- Part No.:
- SMBJ28CAQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ28CAQ-13-F.pdf
- Description:
- TVS DIODE 28VWM 45.4VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:69,042
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Product details
Overview
SMBJ28CAQ-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, 28V reverse standoff voltage (VRWM), and clamping voltage of 45.4V at 13.2A peak pulse current. It protects CAN, LIN, and sensor interfaces in 12V/24V vehicle subsystems against ISO7637-2 Pulse 1/2a/3a/3b surges and ISO10605 ESD events.
For engineers reviewing the SMBJ28CAQ-13-F datasheet, SMBJ28CAQ-13-F pinout, SMBJ28CAQ-13-F application, or SMBJ28CAQ-13-F equivalent, this device is selected for AEC-Q101-compliant surge protection where clamping voltage margin, low leakage (<0.5µA @ VRWM), and IATF 16949 traceable manufacturing are mandatory.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, with breakdown voltage (VBR) specified at 31.1–34.4V (min/max) under 1mA test current. Its clamping behavior follows the 10×1000µs waveform per REA standard, delivering 45.4V VC at IPP = 13.2A - critical for preserving downstream transceivers during load dump or inductive switching events.
Thermally rated for -55°C to +175°C junction operation and packaged in UL 94V-0 molded plastic, it sustains 5W steady-state power at TL = +75°C with 4.8W/°C derating above +25°C ambient. Moisture sensitivity is Level 1 per J-STD-020, enabling standard SMT reflow without baking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPK) | 600W - withstands ISO7637-2 Pulse 3b (+150V) without failure |
| Reverse Standoff Voltage (VRWM) | 28.0V - blocks normal 12V/24V rail noise while triggering above system overvoltage thresholds |
| Clamping Voltage (VC) | 45.4V @ IPP = 13.2A - limits transient voltage seen by protected ICs to safe levels |
| Breakdown Voltage (VBR) | 31.1–34.4V @ IT = 1mA - ensures reliable turn-on before damage to downstream components |
| Leakage Current (IR) | <0.5µA @ VRWM - negligible standby power loss in always-on automotive modules |
| Operating Temperature | -55°C to +175°C - supports under-hood placement near engine control units |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, lead-free matte tin plating, 0.1g weight, UL 94V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry (uni-dir) / Symmetric terminal (bi-dir) | For bi-directional devices like SMBJ28CAQ-13-F, both terminals behave identically - no polarity marking required |
| Cathode | Current exit (uni-dir) / Symmetric terminal (bi-dir) | Same as Anode in bi-directional configuration; device clamps equally for ± transients |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use with PPAP documentation and IATF 16949 manufacturing control |
| ISO10605 ESD compliance | 30kV air/contact discharge - meets full vehicle-level electrostatic immunity requirements |
| ISO7637-2 surge immunity | Rated for Pulse 1 (-150V), Pulse 2a (+112V), Pulse 3a (-220V), Pulse 3b (+150V) |
| Halogen & antimony free | <900ppm Br, <900ppm Cl (<1500ppm total Br+Cl), <1000ppm Sb - compliant with global "Green" directives |
Applications
| Body Control Module (BCM) | Infotainment Head Unit |
|---|---|
Use Scenario: Protecting LIN bus transceivers and door module sensors from battery line transients during jump-start or alternator load dump. IC Role / Device Role / Timing Role: Bi-directional TVS placed at connector interface to clamp ±150V pulses per ISO7637-2 Pulse 3b. Use Value: Prevents latch-up or permanent damage to 5V/3.3V microcontrollers and LIN PHY ICs during real-world vehicle electrical disturbances. | Use Scenario: Safeguarding USB-C and HDMI port ESD paths in center-stack displays exposed to user contact discharge. IC Role / Device Role / Timing Role: Front-line ESD suppressor meeting ISO10605 30kV contact discharge requirement on high-speed data lines. Use Value: Maintains signal integrity below 1pF typical capacitance while absorbing >30kV discharges without degradation. |
| Engine Control Unit (ECU) | ADAS Camera Module |
Use Scenario: Shielding CAN FD transceivers from ignition coil-induced spikes and relay switching noise in engine bay harnesses. IC Role / Device Role / Timing Role: Low-leakage (0.5µA) bi-directional TVS on CANH/CANL lines, operating continuously at 125°C ambient. Use Value: Ensures CAN communication remains functional after repeated exposure to 100A surge currents per ISO7637-2 Pulse 1. | Use Scenario: Protecting MIPI CSI-2 differential pairs in rear-view cameras subjected to cable discharge events during assembly or service. IC Role / Device Role / Timing Role: Compact SMB-footprint TVS placed adjacent to connector to minimize inductance in ESD current path. Use Value: Enables robust field reliability with <1.9A peak pulse current handling at 200V VRWM variants, scalable to camera voltage rails. |
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 |
|---|---|---|---|
| SMBJ28CA | No AQ suffix - not AEC-Q101 qualified; RoHS but not automotive change control | Limited to industrial or consumer designs without PPAP or IATF 16949 traceability | Select only if automotive qualification is not required and cost is primary constraint |
| TPSMBS28C | Same VRWM/VC specs but TO-277 package - higher thermal mass, lower mounting density | Better power dissipation in high-temperature zones but incompatible with SMB footprint | Choose when board space allows larger package and thermal performance outweighs layout constraints |
Compared with SMBJ28CA and TPSMBS28C, SMBJ28CAQ-13-F uniquely delivers AEC-Q101 validation, SMB footprint compatibility, and full ISO7637-2/Pulse 3b compliance - making it the only drop-in solution for production automotive ECUs requiring documented change control and PPAP support.
Availability
SMBJ28CAQ-13-F is available at Aetrix Electronics and suitable for automotive body electronics, infotainment systems, and ADAS sensor interfaces requiring stable component supply across multi-year vehicle production cycles.
Supply support for SMBJ28CAQ-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 for automotive, industrial, computing, and consumer markets.
The SMBJ(AQ) series is designed specifically for AEC-Q101-compliant transient suppression in harsh automotive environments, targeting ISO7637-2 and ISO10605 compliance with zero compromise on thermal robustness or manufacturing traceability.
FAQ
What does the 'AQ' suffix signify in SMBJ28CAQ-13-F?
The 'AQ' suffix denotes AEC-Q101 qualification, PPAP capability, and manufacture in IATF 16949-certified facilities. It confirms full automotive change control, lot-level traceability, and compliance with stress-test requirements including temperature cycling, HTRB, and ESD robustness - distinguishing it from commercial-grade SMBJ28CA parts.
Is SMBJ28CAQ-13-F unidirectional or bidirectional?
SMBJ28CAQ-13-F is a bi-directional TVS diode, indicated by the 'C' in the part number. It provides symmetrical clamping for both positive and negative transients, with no cathode band marking - unlike unidirectional variants which feature a polarity indicator bar on the package.
Can SMBJ28CAQ-13-F be used in 48V mild-hybrid systems?
No - its 28V VRWM and 45.4V clamping voltage are optimized for 12V/24V architectures. For 48V systems, Diodes offers higher-voltage variants such as SMBJ64CAQ-13-F (64V VRWM) or SMBJ85CAQ-13-F (85V VRWM), which maintain identical AEC-Q101 qualification and package form factor.
What is the maximum allowable PCB pad temperature during reflow soldering?
The SMBJ28CAQ-13-F is rated for moisture sensitivity Level 1 per J-STD-020 and supports standard Pb-free reflow profiles. Peak PCB pad temperature must not exceed 260°C for ≤30 seconds, with ramp rates conforming to IPC/JEDEC J-STD-020D. No pre-bake is required due to its Level 1 classification.
SMBJ28CAQ-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):
- 28V
- Voltage - Breakdown (Min):
- 31.1V
- Voltage - Clamping (Max) @ Ipp:
- 45.4V
- Current - Peak Pulse (10/1000µs):
- 13.2A
- 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
SMBJ28CAQ-13-F FAQ
1.How can I place an order for SMBJ28CAQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ28CAQ-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 SMBJ28CAQ-13-F reliable?
The price and inventory of SMBJ28CAQ-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 SMBJ28CAQ-13-F is usually 5 days.
3.What payment methods are accepted for SMBJ28CAQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ28CAQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ28CAQ-13-F?
SMBJ28CAQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ28CAQ-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 SMBJ28CAQ-13-F?
For technical support, including SMBJ28CAQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ28CAQ-13-F requirements.
6.How does Aetrix verify that SMBJ28CAQ-13-F is sourced from the original manufacturer or authorized distributors?
All SMBJ28CAQ-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 SMBJ28CAQ-13-F meets industry standards.
7.What is the process for return or replacement of SMBJ28CAQ-13-F?
All SMBJ28CAQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ28CAQ-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 SMBJ28CAQ-13-F part is unused and in its original packaging.
Return procedure for SMBJ28CAQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ28CAQ-13-F Tags
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Diodes Incorporated
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