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Diodes Incorporated SMBJ43AQ-13-F
- Part No.:
- SMBJ43AQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ43AQ-13-F.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PP
- Quantity:
- Payment:
- Shipping:
Inventory:7,837
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Product details
Overview
SMBJ43AQ-13-F from Diodes Incorporated is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode designed for automotive circuit protection. It features a 43V reverse standoff voltage (VRWM), 47.8V minimum breakdown voltage (VBR), clamps transients to ≤69.4V at 8.6A peak pulse current (IPP), and meets ISO10605 (±30kV ESD) and ISO7637-2 (Pulse 1/2a/3a/3b) surge immunity requirements in vehicle power networks.
For engineers reviewing the SMBJ43AQ-13-F datasheet, SMBJ43AQ-13-F pinout, SMBJ43AQ-13-F application, or SMBJ43AQ-13-F equivalent, this AEC-Q101 qualified TVS provides verified clamping performance, IATF 16949-manufactured traceability, and RoHS-compliant lead-free plating - critical for automotive body control modules, infotainment power rails, and ADAS sensor interfaces requiring robust transient suppression.
Technical Context
This unidirectional TVS operates as a voltage-clamped shunt device triggered by overvoltage events exceeding its 43V standoff threshold. Its 600W peak pulse power rating (10×1000μs waveform) and 100A non-repetitive surge capability (8.3ms half-sine) enable protection against load dump and inductive switching transients in 12V/24V automotive systems.
Thermal design is supported by a 5.0W steady-state power dissipation at TL = +75°C and a -55°C to +175°C operating junction temperature range. The device exhibits ≤0.5μA reverse leakage at VRWM and 3.5V forward voltage at 35A, confirming low conduction loss during fault conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 43.0V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR (min) | 47.8V @ 1.0mA - Guaranteed breakdown onset ensures reliable triggering above system nominal voltage |
| VC @ IPP | 69.4V @ 8.6A - Clamped voltage level defines maximum stress on downstream ICs during ISO7637-2 Pulse 3b |
| PPK | 600W - Peak pulse power handling per 10×1000μs transient, enabling single-event surge survival |
| IFSM | 100A @ 8.3ms - Surge current rating validates compatibility with automotive load-dump waveforms |
| TJ Range | -55°C to +175°C - Full AEC-Q101 temperature coverage supports under-hood and powertrain placement |
| IR @ VRWM | ≤0.5μA - Negligible leakage preserves battery life in always-on vehicle subsystems |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, molded plastic body with UL 94V-0 flammability rating; moisture sensitivity level 1 per J-STD-020; matte tin-plated terminals solderable per MIL-STD-202, Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry during forward conduction | Connected to protected line (e.g., CAN_H, LIN, or 12V rail) when used in unidirectional configuration |
| Cathode | Current exit during forward conduction; polarity indicator band | Connected to ground or lower-potential reference; cathode band identifies terminal orientation for correct PCB layout |
Key Features
| Feature | Design Value |
|---|---|
| 600W peak pulse power | Enables single-event suppression of ISO7637-2 Pulse 1 (-150V) without degradation in 12V systems |
| AEC-Q101 qualification | Validated reliability for automotive use including temperature cycling, HTRB, and ESD stress testing |
| Lead-free & halogen-free | RoHS 3 compliant with <900ppm Br+Cl and <1000ppm Sb - meets global automotive environmental mandates |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage margin between breakdown and clamping, reducing stress on protected ICs |
Applications
| Body Control Module (BCM) | Infotainment Power Rail |
|---|---|
Use Scenario: Protects microcontroller I/O and LIN bus transceivers from battery line transients during door lock actuation or lighting load switching. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between LIN signal line and chassis ground to clamp negative-going pulses (ISO7637-2 Pulse 3a). Use Value: Limits voltage excursion to ≤69.4V, preventing latch-up or gate oxide damage in 5V-tolerant transceivers. | Use Scenario: Shields USB-C PD controller and display driver ICs from 12V rail surges during ignition-on transitions or alternator regulation faults. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main 12V input to infotainment head unit, activated within nanoseconds of transient onset. Use Value: Absorbs up to 600W for 1ms, maintaining downstream regulator input within safe SOA limits during load dump events. |
| ADAS Camera Power Input | Telematics Control Unit (TCU) |
Use Scenario: Secures 5V camera sensor supply against ESD from connector mating and conducted noise from nearby radar modules. IC Role / Device Role / Timing Role: Secondary protection stage after common-mode choke, clamping fast-rising ESD (ISO10605 contact discharge) on VDD line. Use Value: Responds in <1ns with ≤69.4V clamping, preserving image sensor functionality without reset or corruption. | Use Scenario: Guards cellular modem power interface against coupled transients from antenna switching and GSM burst emissions. IC Role / Device Role / Timing Role: Bidirectional-capable variant (SMBJ43CQ) not used here; unidirectional SMBJ43AQ applied to modem VBAT rail with cathode to ground. Use Value: Maintains modem uptime during ±30kV ESD events by limiting voltage rise to <70V, avoiding brownout resets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43A-Q | Same electrical specs; differs only in packaging marking (no "-13-F" suffix) and reel quantity (same SMB tape-and-reel) | No functional difference; identical AEC-Q101 qualification and thermal performance | Select when standard Diodes part numbering without distributor-specific suffix is required |
| SMCJ43A | Higher 1500W PPK rating in larger SMC package; 100A IFSM unchanged; same VRWM/VBR/VC | Requires more PCB area; suited for higher-energy transients where space permits | Choose for enhanced surge margin in engine bay applications where SMB footprint is insufficient |
Compared with SMBJ43AQ-13-F, SMBJ43A-Q offers identical protection performance with simplified ordering, while SMCJ43A trades compactness for 2.5× higher pulse power - making the SMBJ variant optimal for space-constrained ADAS and infotainment modules where 600W suffices.
Availability
SMBJ43AQ-13-F is available at Aetrix Electronics and suitable for automotive body electronics, infotainment systems, and ADAS camera modules requiring stable component supply across extended production lifecycles.
Supply support for SMBJ43AQ-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.
This device belongs to Diodes' AEC-Q101-qualified SMBJ automotive TVS family, engineered specifically to meet stringent ISO7637-2 and ISO10605 surge/ESD requirements in vehicle electronic control units.
FAQ
What is the polarity configuration of SMBJ43AQ-13-F?
SMBJ43AQ-13-F is a unidirectional TVS diode with anode and cathode terminals clearly marked by a cathode band on the SMB package. It conducts only during reverse-biased overvoltage events - i.e., when cathode voltage exceeds anode voltage by ≥47.8V - and blocks normal forward operation like a rectifier diode.
Does SMBJ43AQ-13-F require external heat sinking?
No external heat sink is required. Its 5.0W steady-state power dissipation rating applies at TL = +75°C with standard PCB copper land patterns. Thermal performance relies on adequate PCB copper area (≥100mm² per terminal recommended) and airflow; derating curves show 4.8W/°C reduction above +25°C ambient.
How does SMBJ43AQ-13-F perform under repeated surge stress?
It is rated for non-repetitive pulses only: maximum 4 pulses per minute at 8.3ms half-sine or 10×1000μs waveform. Repeated surges beyond this duty cycle cause cumulative junction heating and potential degradation. For repetitive threat environments, system-level design must include current limiting or staged protection.
Can SMBJ43AQ-13-F be used in 24V commercial vehicle systems?
Yes - its 43V VRWM and 69.4V clamping voltage provide appropriate margin above 24V nominal systems (typically 20–28V). It satisfies ISO7637-2 Pulse 1 (−150V) and Pulse 2a (+112V) requirements for commercial vehicles, provided layout minimizes inductance and grounding is low-impedance.
SMBJ43AQ-13-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-214AA, SMB
- Series:
- SMBJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
SMBJ43AQ-13-F FAQ
1.How can I place an order for SMBJ43AQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ43AQ-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 SMBJ43AQ-13-F reliable?
The price and inventory of SMBJ43AQ-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 SMBJ43AQ-13-F is usually 5 days.
3.What payment methods are accepted for SMBJ43AQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ43AQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ43AQ-13-F?
SMBJ43AQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ43AQ-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 SMBJ43AQ-13-F?
For technical support, including SMBJ43AQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ43AQ-13-F requirements.
6.How does Aetrix verify that SMBJ43AQ-13-F is sourced from the original manufacturer or authorized distributors?
All SMBJ43AQ-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 SMBJ43AQ-13-F meets industry standards.
7.What is the process for return or replacement of SMBJ43AQ-13-F?
All SMBJ43AQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ43AQ-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 SMBJ43AQ-13-F part is unused and in its original packaging.
Return procedure for SMBJ43AQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ43AQ-13-F Tags
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ESD9B5.0ST5G
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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