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Diodes Incorporated SMBJ45CAQ-13-F
- Part No.:
- SMBJ45CAQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ45CAQ-13-F.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR SMB
- Quantity:
- Payment:
- Shipping:
Inventory:8,563
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Product details
Overview
SMBJ45CAQ-13-F from Diodes Incorporated is a bi-directional 45V standoff, 600W peak pulse power automotive transient voltage suppressor (TVS) diode in SMB package, with clamping voltage of 72.7V at 8.3A peak pulse current, AEC-Q101 qualified, and compliant with ISO10605 (±30kV ESD) and ISO7637-2 (Pulse 1/2a/3a/3b) for engine control unit power rail protection.
For engineers reviewing the SMBJ45CAQ-13-F datasheet, SMBJ45CAQ-13-F pinout, SMBJ45CAQ-13-F application, or SMBJ45CAQ-13-F equivalent, this part supports high-reliability automotive surge suppression where precise clamping voltage, low leakage (<0.5µA), and IATF 16949-manufactured traceability are required.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, enabling bidirectional surge clamping on differential or floating automotive signal/power lines without polarity dependency. Its 45V reverse standoff voltage (VRWM) ensures stable blocking during nominal 12V/24V system operation while allowing fast response to transients exceeding ±72.7V.
The device uses silicon avalanche junction technology with 10×1000µs waveform-rated clamping, delivering 600W non-repetitive peak pulse power at TA = +25°C and derating linearly to zero at +175°C ambient. It features 0.5µA max reverse leakage at VRWM and 5W steady-state power dissipation at TL = +75°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600W - sustains single 10×1000µs surges up to ISO7637-2 Pulse 3b (+150V) without failure |
| Reverse Standoff Voltage | 45V - blocks normal 12V/24V automotive battery fluctuations while triggering above system overvoltage thresholds |
| Clamping Voltage | 72.7V @ IPP = 8.3A - limits downstream IC voltage to safe level during 10×1000µs transient events |
| Breakdown Voltage | 50.0–55.3V @ IT = 1mA - defines sharp, repeatable avalanche onset for predictable protection timing |
| Reverse Leakage | ≤0.5µA @ VRWM - minimizes standby power loss and avoids false triggering in low-current sensor circuits |
| Operating Temperature | −55°C to +175°C - supports under-hood placement in engine management, transmission control, and ADAS modules |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD stress per AEC standard |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, molded plastic body with UL 94V-0 flammability rating, 0.1g weight, matte tin-plated terminals solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point (bi-directional) | Functions as cathode during negative transients; no polarity marking - symmetrical conduction |
| Cathode | Current exit point (bi-directional) | Functions as anode during positive transients; terminal pair provides identical clamping in both directions |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping architecture | Enables single-device protection of floating or AC-coupled lines (e.g., CAN FD bus, LIN, sensor bridges) without external polarity logic |
| ISO10605 ±30kV ESD compliance | Validated for air and contact discharge - eliminates need for secondary ESD components in infotainment and body control modules |
| IATF 16949 manufacturing & PPAP capability | Ensures full production traceability, change control, and audit-ready documentation for Tier 1 automotive supply chain integration |
| Halogen- and antimony-free "Green" construction | Meets EU RoHS 3 (2015/863/EU) with Br+Cl <1500ppm and Sb <1000ppm - supports OEM sustainability compliance reporting |
| Moisture sensitivity Level 1 | Eliminates bake requirements prior to reflow - reduces assembly cost and process complexity in high-volume SMT lines |
Applications
| Engine Control Unit (ECU) Power Input | CAN FD Transceiver Protection |
|---|---|
|
Use Scenario: 12V battery feed to microcontroller power supply in gasoline/diesel engine ECUs exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main VBAT rail, responding within nanoseconds to ISO7637-2 Pulse 1 (−150V) and Pulse 2a (+112V). Use Value: Limits rail voltage to ≤72.7V, preventing damage to 5V/3.3V LDOs and MCU I/O cells while maintaining AEC-Q100 qualification integrity. |
Use Scenario: Bidirectional protection of CAN_H/CAN_L differential pair in ADAS domain controllers subjected to ESD and coupled transients. IC Role / Device Role / Timing Role: Symmetric clamping element placed across differential lines, suppressing ±30kV ESD (ISO10605) and common-mode surges without disrupting signal integrity. Use Value: Maintains CAN FD bit rate up to 5 Mbps by limiting inter-line capacitance to <100pF and avoiding DC bias shift during clamping. |
| Body Control Module (BCM) LIN Bus | Electric Power Steering (EPS) Motor Driver |
|
Use Scenario: LIN physical layer protection in door module controllers where long harness runs induce ISO7637-2 Pulse 3a (−220V) and Pulse 3b (+150V). IC Role / Device Role / Timing Role: Low-leakage (≤0.5µA) bi-directional clamp on LIN bus line, preserving sleep-mode current budget while enabling fast transient response. Use Value: Prevents false wake-up and bus lock-up by clamping transients before they exceed LIN transceiver absolute maximum ratings (typically ±40V). |
Use Scenario: Gate driver supply rail protection in EPS motor inverters exposed to inductive switching spikes and load dump events. IC Role / Device Role / Timing Role: Secondary clamping device parallel to bulk capacitor on 12V gate drive rail, absorbing energy from MOSFET turn-off overshoot. Use Value: Extends gate driver IC lifetime by limiting VDD spikes to ≤72.7V, reducing cumulative dielectric stress on internal LDOs and level shifters. |
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 |
|---|---|---|---|
| SMBJ45CA-13-F (Diodes) | No AEC-Q101 qualification; RoHS-compliant but not PPAP-capable; same electrical specs | Acceptable for non-safety-critical consumer or industrial designs lacking automotive change control requirements | Select only if AEC-Q101 documentation, IATF 16949 traceability, or PPAP submission is not required |
| SAC45C (Littelfuse) | Same 45V VRWM, 72.7V VC, but rated for 600W @ 10×1000µs; AEC-Q101 qualified, different marking and tape/reel packaging | Drop-in compatible electrically; requires validation of mechanical fit and reflow profile due to minor SMB dimensional variance | Choose when dual-sourcing is mandated or when Littelfuse's global logistics network offers better lead time |
Compared with SMBJ45CAQ-13-F, the SMBJ45CA-13-F lacks automotive change control and PPAP support, while SAC45C matches qualification and performance but introduces sourcing and layout verification overhead.
Availability
SMBJ45CAQ-13-F is available at Aetrix Electronics and suitable for engine control units, CAN FD networks, body control modules, and electric power steering systems requiring stable component supply with full automotive compliance documentation.
Supply support for SMBJ45CAQ-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 IATF 16949-certified facilities.
This device belongs to Diodes' SMBJ-AQ automotive TVS series, engineered specifically for ISO7637-2 and ISO10605 compliance in safety-critical vehicle subsystems where AEC-Q101 validation and PPAP readiness are mandatory.
FAQ
What is the difference between SMBJ45CAQ-13-F and SMBJ45A-13-F?
SMBJ45CAQ-13-F is the AEC-Q101-qualified, PPAP-capable, IATF 16949-manufactured version with full automotive change control and traceability. SMBJ45A-13-F is the commercial-grade variant lacking AEC qualification, PPAP documentation, and automotive-specific reliability testing - it shares identical electrical parameters but cannot be used in certified automotive designs.
Does SMBJ45CAQ-13-F require a heatsink for 5W continuous dissipation?
No. The 5W steady-state power rating (PM(AV)) applies at TL = +75°C lead temperature, not ambient. In typical SMB surface-mount applications with 2 oz copper and 2 cm² thermal pad, natural convection achieves sufficient heat transfer without added heatsinking - verified per JEDEC JESD51-2 thermal characterization.
Can SMBJ45CAQ-13-F protect against load dump per ISO16750-2?
Yes. With 600W peak pulse power and 72.7V clamping voltage, it meets ISO16750-2 Test 4a (load dump, 12V system, 35V/100ms) when used with appropriate series impedance (e.g., 1Ω inline resistor). Its 100A IFSM rating supports short-duration high-current surges typical of alternator regulation failure events.
Is the SMBJ45CAQ-13-F bi-directional clamping voltage symmetric?
Yes. As a bi-directional TVS, its clamping voltage is identical for positive and negative transients: 72.7V measured at ±8.3A using the standardized 10×1000µs waveform. This symmetry is confirmed in the datasheet's electrical characteristics table and validated per AEC-Q101 transient testing protocols.
SMBJ45CAQ-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):
- 45V
- Voltage - Breakdown (Min):
- 50V
- Voltage - Clamping (Max) @ Ipp:
- 72.7V
- Current - Peak Pulse (10/1000µs):
- 8.3A
- 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
SMBJ45CAQ-13-F FAQ
1.How can I place an order for SMBJ45CAQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ45CAQ-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 SMBJ45CAQ-13-F reliable?
The price and inventory of SMBJ45CAQ-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 SMBJ45CAQ-13-F is usually 5 days.
3.What payment methods are accepted for SMBJ45CAQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ45CAQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ45CAQ-13-F?
SMBJ45CAQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ45CAQ-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 SMBJ45CAQ-13-F?
For technical support, including SMBJ45CAQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ45CAQ-13-F requirements.
6.How does Aetrix verify that SMBJ45CAQ-13-F is sourced from the original manufacturer or authorized distributors?
All SMBJ45CAQ-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 SMBJ45CAQ-13-F meets industry standards.
7.What is the process for return or replacement of SMBJ45CAQ-13-F?
All SMBJ45CAQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ45CAQ-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 SMBJ45CAQ-13-F part is unused and in its original packaging.
Return procedure for SMBJ45CAQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ45CAQ-13-F Tags
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