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Diodes Incorporated SMBJ43CA-13-F
- Part No.:
- SMBJ43CA-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ43CA-13-F.pdf
- Description:
- TVS DIODE 43VWM 69.4VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:9,973
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Product details
Overview
SMBJ43CA-13-F from Diodes Incorporated is a bi-directional transient voltage suppressor (TVS) diode in SMB package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 43 V reverse standoff voltage (VRWM), 47.8–54.9 V breakdown voltage (VBR), 69.4 V maximum clamping voltage (VC) at 8.6 A peak pulse current (IPP), and 600 W peak pulse power dissipation - deployed in industrial power supplies and automotive infotainment interfaces.
For engineers reviewing the SMBJ43CA-13-F datasheet, SMBJ43CA-13-F pinout, SMBJ43CA-13-F application, or SMBJ43CA-13-F equivalent, key selection criteria include clamping performance under 8.3 ms surge, bi-directional symmetry for AC-coupled lines, thermal derating above +25°C, and RoHS-compliant matte tin plating for lead-free reflow compatibility.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, responding to transients exceeding VRWM by avalanche conduction. Its glass-passivated silicon die ensures stable breakdown characteristics and low leakage (<5 µA at VRWM), while bi-directional symmetry enables use on balanced lines without polarity concerns.
The device complies with IEC 61000-4-2 (ESD) and IEC 61000-4-5 (surge) immunity requirements. Thermal performance is defined by a 4.8 W/°C derating slope above +25°C ambient and a junction temperature range of –55°C to +150°C, supporting operation in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600 W - sustains single 8.3 ms half-sine surges up to this level without failure |
| Reverse Standoff Voltage | 43 V - maximum continuous DC or RMS voltage before significant leakage begins |
| Breakdown Voltage | 47.8–54.9 V @ 1.0 mA - tight VBR window ensures predictable turn-on across production lot |
| Clamping Voltage | 69.4 V @ 8.6 A IPP - limits downstream circuit voltage during surge events |
| Peak Pulse Current | 8.6 A - maximum non-repetitive surge current it can safely divert |
| Leakage Current | ≤5 µA @ 43 V - minimal standby power loss and signal integrity impact |
| Operating Temperature | –55°C to +150°C - validated for under-hood automotive and industrial control cabinet use |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, molded plastic case rated UL 94V-0, 0.1 g weight, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode | Bi-directional terminals | No polarity marking; symmetric structure allows connection in either orientation on AC or floating lines |
| Cathode Band | Not applicable | Absent - bi-directional variant lacks cathode band; distinct from unidirectional SMBJ43A-13-F |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse rating | Enables protection against severe IEC 61000-4-5 Level 4 surges (4 kV line-to-earth) in compact SMB footprint |
| Glass-passivated die | Ensures long-term stability of VBR and low parametric drift under thermal cycling and humidity stress |
| Bi-directional architecture | Eliminates need for polarity-aware layout on differential buses like RS-485, CAN FD, or audio lines |
| RoHS & Halogen-Free | Meets EU RoHS 2 and green manufacturing standards (<900 ppm Br/Cl, <1000 ppm Sb) |
| Lead-free matte tin plating | Compatible with Pb-free reflow profiles (JEDEC J-STD-020) and prevents intermetallic growth during assembly |
Applications
| Industrial PLC I/O Protection | Automotive Infotainment USB Lines |
|---|---|
Use Scenario: Protecting 24 V DC analog input modules from induced lightning surges and switching transients in factory automation cabinets. IC Role / Device Role / Timing Role: Shunt TVS diode placed at connector entry point to clamp transients before reaching precision ADC front-end. Use Value: Clamps 8.6 A surges to ≤69.4 V, preserving 24 V system margin and preventing damage to ±10 V input stage op-amps. | Use Scenario: Safeguarding USB 2.0 D+/D− lines in head-unit designs exposed to ESD events during user interface interaction. IC Role / Device Role / Timing Role: Bi-directional TVS placed directly at USB receptacle to suppress ±15 kV contact ESD per IEC 61000-4-2. Use Value: Symmetric clamping maintains signal integrity on differential pair; 5 µA leakage avoids USB suspend current violations. |
| Telecom PoE Data Line Protection | Medical Diagnostic Equipment Signal Conditioning |
Use Scenario: Shielding Ethernet data pairs (10/100BASE-T) carrying 48 V PoE power from surge coupling via shared cabling runs. IC Role / Device Role / Timing Role: Bi-directional TVS on each twisted pair, referenced to common-mode ground, handling combined power/signal transients. Use Value: Withstands 600 W pulses while maintaining <0.3 pF typical capacitance at 1 MHz, avoiding signal rise-time degradation. | Use Scenario: Protecting low-noise sensor amplifier inputs (e.g., ECG, EEG) from electrostatic discharge during patient electrode attachment. IC Role / Device Role / Timing Role: Front-end TVS on isolated analog input path, selected for ultra-low leakage to prevent DC offset drift. Use Value: ≤5 µA leakage at 43 V standoff preserves sub-µV input bias stability required for high-gain medical amplifiers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43A-13-F | Unidirectional; includes cathode band marking; identical VRWM/VBR/VC but only conducts in one polarity | Required where polarity is fixed (e.g., DC power rail protection); unsuitable for AC or differential lines | Select when protecting unidirectional 43 V supply rails with known ground reference |
| SMAJ43CA | Same electrical specs but in smaller SMA (DO-214AC) package; lower 400 W peak power rating | Used where board space is constrained but surge energy is lower (e.g., consumer USB ports) | Choose for cost-sensitive, lower-energy applications where 400 W rating suffices |
Compared with SMBJ43A-13-F and SMAJ43CA, SMBJ43CA-13-F uniquely supports bi-directional surge suppression in the industry-standard SMB footprint with full 600 W capability - making it optimal for balanced interfaces requiring polarity-agnostic protection without sacrificing power-handling margin.
Availability
SMBJ43CA-13-F is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive infotainment systems, and telecom PoE equipment requiring stable component supply and long-lifecycle support.
Supply support for SMBJ43CA-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, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.
This part belongs to Diodes' SMBJ series of surface-mount TVS diodes, engineered specifically for high-energy transient suppression in industrial, automotive, and communications infrastructure where reliability under repeated surge stress is critical.
FAQ
What does the "C" suffix in SMBJ43CA-13-F indicate?
The "C" denotes bi-directional configuration - meaning the device has symmetrical avalanche characteristics in both forward and reverse bias, with no cathode band marking. This distinguishes it from the unidirectional SMBJ43A-13-F, which conducts only in reverse and includes a polarity indicator.
Can SMBJ43CA-13-F be used in place of a unidirectional TVS on a DC power rail?
Yes, but with caution: its bi-directional behavior means it will also clamp positive transients relative to ground, potentially interfering with upstream regulators or load switches. For pure DC rail protection, SMBJ43A-13-F is preferred unless bidirectional fault tolerance is explicitly required.
What is the thermal resistance from junction to ambient (RθJA) for SMBJ43CA-13-F?
RθJA is not specified in the DS19002 datasheet, as thermal performance is characterized via derating curves. At +25°C ambient, it delivers full 600 W; derating is linear at 4.8 W/°C above that, implying an effective RθJA ≈ 20.8°C/W under standard PCB mounting conditions per JEDEC test board guidelines.
Is SMBJ43CA-13-F compliant with AEC-Q200 for automotive use?
No - while it operates from –55°C to +150°C and is widely used in automotive infotainment, Diodes Incorporated does not qualify the SMBJ series to AEC-Q200. For AEC-Q200-compliant alternatives, consider the company's Automotive Grade P4SMAJ or SM8S series with explicit qualification documentation.
SMBJ43CA-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:
- -
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
SMBJ43CA-13-F FAQ
1.How can I place an order for SMBJ43CA-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ43CA-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 SMBJ43CA-13-F reliable?
The price and inventory of SMBJ43CA-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 SMBJ43CA-13-F is usually 5 days.
3.What payment methods are accepted for SMBJ43CA-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ43CA-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ43CA-13-F?
SMBJ43CA-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ43CA-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 SMBJ43CA-13-F?
For technical support, including SMBJ43CA-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ43CA-13-F requirements.
6.How does Aetrix verify that SMBJ43CA-13-F is sourced from the original manufacturer or authorized distributors?
All SMBJ43CA-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 SMBJ43CA-13-F meets industry standards.
7.What is the process for return or replacement of SMBJ43CA-13-F?
All SMBJ43CA-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ43CA-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 SMBJ43CA-13-F part is unused and in its original packaging.
Return procedure for SMBJ43CA-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ43CA-13-F Tags
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Diodes Incorporated
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Diodes Incorporated
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