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Diodes Incorporated SMBJ43CAQ-13-F
- Part No.:
- SMBJ43CAQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ43CAQ-13-F.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PP
- Quantity:
- Payment:
- Shipping:
Inventory:2,495
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Product details
Overview
SMBJ43CAQ-13-F from Diodes Incorporated is a bi-directional 600W surface-mount transient voltage suppressor (TVS) designed for automotive power line protection. It features a 43V reverse standoff voltage (VRWM), 47.8–52.8V breakdown voltage (VBR), clamps to ≤69.4V at 8.6A peak pulse current (IPP), and meets ISO7637-2 Pulse 1/2a/3a/3b and ISO10605 ESD requirements in vehicle infotainment and body control modules.
For engineers reviewing the SMBJ43CAQ-13-F datasheet, SMBJ43CAQ-13-F pinout, SMBJ43CAQ-13-F application, or SMBJ43CAQ-13-F equivalent, key selection criteria include clamping voltage margin vs. system rail, bi-directional surge handling for AC-coupled or floating lines, AEC-Q101 qualification status, and SMB package thermal performance under pulsed load conditions.
Technical Context
This bi-directional TVS diode operates symmetrically across both polarities, enabling robust protection of differential or ungrounded signal/power lines against bidirectional transients such as ISO7637-2 Pulse 3a (−220V) and Pulse 3b (+150V). Its 600W peak pulse power rating is specified per 10×1000μs waveform with derating above +25°C ambient.
Clamping behavior is defined by a maximum VC of 69.4V at IPP = 8.6A, with low leakage (<0.5µA @ VRWM) and tight VBR tolerance (±5.5% typical). The device sustains 100A non-repetitive forward surge current (IFSM) for 8.3ms half-sine wave, supporting high-energy automotive load dump immunity when used with appropriate upstream impedance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600W - Sustains single 10×1000μs surges up to this level without failure |
| Reverse Standoff Voltage | 43V - Maximum continuous DC or RMS voltage before significant leakage |
| Breakdown Voltage | 47.8–52.8V - Guaranteed conduction onset range at 1mA test current |
| Clamping Voltage | ≤69.4V @ 8.6A - Maximum voltage seen by protected circuit during rated surge |
| Peak Pulse Current | 8.6A - Surge current corresponding to rated clamping voltage |
| Leakage Current | ≤0.5µA @ 43V - Negligible standby power loss and signal interference |
| AEC-Q101 Qualified | Yes - Validated for automotive underhood and cabin applications per stress test schedule |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, molded plastic housing with UL 94V-0 flammability rating; moisture sensitivity level 1 per J-STD-020; 0.1g mass; matte tin-plated terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Cathode Band Absent) | Bi-directional terminal | No polarity marking; symmetrical conduction in either direction |
| Cathode (Cathode Band Absent) | Bi-directional terminal | Identical to Anode; terminals interchangeable in layout |
Key Features
| Feature | Design Value |
|---|---|
| 600W peak pulse power | Enables protection against high-energy ISO7637-2 Pulse 1 (−150V) and Pulse 3a (−220V) without thermal runaway |
| Bi-directional architecture | Supports AC-coupled buses (e.g., LIN, CAN FD stubs) and floating power domains without polarity constraints |
| AEC-Q101 qualification | Validates reliability for automotive applications including engine control, ADAS sensors, and infotainment head units |
| RoHS 3 & "Green" compliant | Meets EU halogen-free requirements (<900ppm Br/Cl, <1000ppm Sb) for end-of-life recyclability and regulatory compliance |
Applications
| Automotive Infotainment Power Rails | Body Control Module (BCM) I/O Protection |
|---|---|
Use Scenario: 12V supply input to display controller ICs exposed to load dump and jump-start transients. IC Role / Device Role: Primary overvoltage clamp on main VCC rail prior to DC-DC converter input. Use Value: Limits transient voltage to ≤69.4V, preventing damage to downstream 40V-rated buck controllers and preserving system uptime. | Use Scenario: LIN bus transceiver power pins subjected to ISO7637-2 Pulse 2a (+112V) during alternator field decay. IC Role / Device Role: Bi-directional clamping element placed between VBAT and transceiver VDD pin. Use Value: Symmetric clamping ensures protection regardless of transient polarity, eliminating need for dual unidirectional devices. |
| ADAS Camera Module Power Input | Electric Power Steering (EPS) Sensor Interface |
Use Scenario: 5V or 3.3V camera module supply line encountering coupled noise from adjacent motor drivers. IC Role / Device Role: Secondary clamping stage after primary filter, targeting fast-rising ESD events per ISO10605. Use Value: Sub-1µA leakage preserves low-power sleep mode integrity while delivering 30kV air/contact ESD immunity. | Use Scenario: Analog sensor signal lines (e.g., torque sensor bridge output) routed near high-current EPS motor phases. IC Role / Device Role: Low-capacitance TVS placed at connector interface to suppress coupled transients before signal conditioning amplifier. Use Value: Maintains signal fidelity with minimal added capacitance, avoiding bandwidth reduction in critical feedback loops. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bi-directional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43CA | Same electrical specs but not AEC-Q101 qualified; RoHS-compliant but not "Green" certified | Limited to industrial or consumer-grade automotive accessories (non-safety-critical) | Select when cost sensitivity outweighs automotive qualification requirements |
| TPSMD43CA | Same VRWM/VC/IPP, but higher PM(AV) = 6.5W and wider operating temperature (−65°C to +175°C) | Better suited for under-hood applications with extreme thermal cycling | Prefer for engine bay placement where ambient exceeds +125°C regularly |
Compared with SMBJ43CAQ-13-F, SMBJ43CA lacks AEC-Q101 validation and halogen-free certification, while TPSMD43CA offers extended thermal capability but requires requalification of PCB layout due to different package footprint.
Availability
SMBJ43CAQ-13-F is available at Aetrix Electronics and suitable for automotive infotainment systems, body control modules, and ADAS camera power rails requiring stable component supply across multi-year production cycles.
Supply support for SMBJ43CAQ-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.
The SMBJ(AQ) series is engineered specifically for AEC-Q101-compliant transient suppression in 12V/24V automotive subsystems, emphasizing robustness against ISO7637-2 and ISO10605 threats.
FAQ
What does the 'Q' suffix signify in SMBJ43CAQ-13-F?
The 'Q' denotes AEC-Q101 qualification, confirming the device has passed stress tests for automotive use including HTOL, temperature cycling, and ESD. It also indicates manufacturing in IATF 16949-certified facilities and PPAP capability-critical for Tier 1 supplier documentation.
Can SMBJ43CAQ-13-F be used in place of a unidirectional TVS like SMBJ43AQ-13-F?
No-SMBJ43CAQ-13-F is bi-directional and lacks cathode polarity marking, making it unsuitable for DC-biased lines requiring asymmetric clamping. Unidirectional variants provide lower forward voltage drop in one direction and are mandatory for rectified or ground-referenced rails.
What is the maximum allowable PCB trace length between SMBJ43CAQ-13-F and the protected IC?
Trace inductance must be minimized: keep total loop inductance ≤15nH. For typical 1oz copper, this limits combined trace + via inductance to ~5mm per mm of length-so traces should be ≤8mm long with direct ground plane coupling and no vias if possible.
Does SMBJ43CAQ-13-F require derating at elevated ambient temperatures?
Yes-peak pulse power derates linearly at 4.8W/°C above +25°C ambient. At +85°C, maximum PPK drops to 312W. Steady-state power dissipation remains 5W up to +75°C lead temperature, requiring adequate copper pour for thermal relief.
SMBJ43CAQ-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):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 69.4V
- Current - Peak Pulse (10/1000µs):
- 8.6A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
SMBJ43CAQ-13-F FAQ
1.How can I place an order for SMBJ43CAQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ43CAQ-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 SMBJ43CAQ-13-F reliable?
The price and inventory of SMBJ43CAQ-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 SMBJ43CAQ-13-F is usually 5 days.
3.What payment methods are accepted for SMBJ43CAQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ43CAQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ43CAQ-13-F?
SMBJ43CAQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ43CAQ-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 SMBJ43CAQ-13-F?
For technical support, including SMBJ43CAQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ43CAQ-13-F requirements.
6.How does Aetrix verify that SMBJ43CAQ-13-F is sourced from the original manufacturer or authorized distributors?
All SMBJ43CAQ-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 SMBJ43CAQ-13-F meets industry standards.
7.What is the process for return or replacement of SMBJ43CAQ-13-F?
All SMBJ43CAQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ43CAQ-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 SMBJ43CAQ-13-F part is unused and in its original packaging.
Return procedure for SMBJ43CAQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ43CAQ-13-F Tags
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