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Diodes Incorporated SMBJ43A-13-F
- Part No.:
- SMBJ43A-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ43A-13-F.pdf
- Description:
- TVS DIODE 43VWM 69.4VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:10,312
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Product details
Overview
SMBJ43A-13-F from Diodes Incorporated is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode with 43V reverse standoff voltage, 47.8V minimum breakdown voltage at 1mA, and 69.4V maximum clamping voltage at 8.6A peak pulse current. It features glass-passivated die construction, SMB package, and is rated for industrial power supply input protection and automotive ECU surge suppression.
For engineers reviewing the SMBJ43A-13-F datasheet, SMBJ43A-13-F pinout, SMBJ43A-13-F application, or SMBJ43A-13-F equivalent, key selection criteria include clamping voltage margin relative to protected IC VDD, peak pulse current capability under IEC 61000-4-5 waveform, standoff voltage derating over temperature, and RoHS-compliant lead-free plating compatibility with reflow profiles.
Technical Context
This TVS operates as a fast-acting shunt protector triggered by reverse-biased avalanche breakdown above its VRWM of 43V. Its unidirectional configuration provides polarity-specific surge clamping on DC lines, with clamping initiated within <1ns after voltage exceeds VBR = 47.8–54.9V.
Thermal performance is defined by 5.0W steady-state power dissipation at TL = +75°C and 4.8W/°C derating above +25°C ambient. The device sustains 100A non-repetitive forward surge current (8.3ms half-sine) and exhibits ≤5.0μA reverse leakage at rated VRWM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600W - Withstands single 8.3ms surge events per IEC 61000-4-5 Level 4 without failure |
| Reverse Standoff Voltage | 43V - Maximum continuous DC or RMS voltage before significant leakage begins |
| Breakdown Voltage | 47.8–54.9V @ 1mA - Confirmed avalanche onset range; defines minimum overvoltage threshold |
| Clamping Voltage | 69.4V @ 8.6A - Maximum voltage seen by downstream circuit during specified 8.3ms surge |
| Package | SMB - Surface-mount outline (5.59 × 4.06 × 2.21 mm) compatible with standard SMT pick-and-place and reflow |
| Operating Temperature | −55°C to +150°C - Validated junction temperature range for automotive under-hood and industrial control environments |
| RoHS Compliance | Lead-free, halogen- and antimony-free - Meets EU Directive 2011/65/EU and IPC/JEDEC J-STD-020 Level 1 moisture sensitivity |
Pinout & Package
Package: SMB (Surface Mount Body), molded plastic case with UL 94V-0 flammability rating, matte tin-plated terminals, 0.1g mass. Cathode band denotes polarity for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to system ground or low-voltage rail; completes shunt path during reverse surge |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 48V bus); avalanche conduction initiates here when VAK > VBR |
Key Features
| Feature | Design Value |
|---|---|
| 600W peak pulse power | Enables robust protection against IEC 61000-4-5 4kV/2Ω combination wave surges on 24–48V systems |
| Glass-passivated die | Ensures stable breakdown characteristics and long-term reliability under thermal cycling and humidity stress |
| Uni-directional configuration | Prevents unwanted conduction during normal positive DC bias while clamping negative transients |
| Lead-free, green construction | Supports automated assembly with Pb-free reflow profiles and meets environmental compliance mandates |
Applications
| Industrial PLC I/O Protection | Automotive Body Control Module |
|---|---|
Use Scenario: 24V DC input terminals on programmable logic controller modules exposed to inductive switching transients and load dump. IC Role / Device Role / Timing Role: Shunt TVS placed between input rail and ground to clamp surges before they reach upstream DC-DC converter and microcontroller. Use Value: Limits transient voltage to ≤69.4V, protecting 36V-rated input regulators and ensuring system uptime during factory floor electrical noise events. | Use Scenario: LIN bus power rail and sensor supply lines in body control units subject to ISO 7637-2 Pulse 1/2a/5a. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 12V auxiliary rail feeding door module actuators and ambient light sensors. Use Value: Clamps 100V/50ms load dump pulses to safe levels, preventing latch-up in 5V LDOs and preserving EEPROM data integrity. |
| Telecom Power Entry | Renewable Energy Charge Controller |
Use Scenario: 48V DC input stage of PoE-powered network switches and base station radios. IC Role / Device Role / Timing Role: First-line transient suppressor ahead of hot-swap controllers and primary filter capacitors. Use Value: Absorbs up to 600W for 8.3ms, maintaining <70V clamping to prevent MOSFET gate oxide rupture and bulk capacitor overvoltage. | Use Scenario: Battery-side input of solar charge controllers interfacing with 48V lead-acid or LiFePO4 banks. IC Role / Device Role / Timing Role: Reverse-polarity and surge protection element on battery connection terminals. Use Value: Blocks reverse connection up to 43V standoff and clamps lightning-induced surges to protect MPPT controller gate drivers and sense amplifiers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43CA-13-F | Bi-directional version; symmetric clamping for AC-coupled or bidirectional signal lines | Required where both positive and negative transients occur (e.g., RS-485, CAN bus) | Select only if bidirectional protection is needed; otherwise unidirectional offers tighter VRWM margin |
| SMAJ43A-13-F | Lower 400W peak power rating; same VRWM/VC but reduced IPP = 6.2A | Suitable for lower-energy surges (IEC 61000-4-4 EFT) but insufficient for full IEC 61000-4-5 Level 4 | Use where space constraints require SMA package and surge threat level is limited to EFT or low-energy transients |
Compared with SMBJ43CA-13-F and SMAJ43A-13-F, SMBJ43A-13-F delivers higher surge energy handling in the same SMB footprint and avoids unnecessary bidirectional leakage in DC-only applications, making it optimal for 48V industrial power rails requiring precise unidirectional clamping.
Availability
SMBJ43A-13-F is available at Aetrix Electronics and suitable for industrial PLC I/O protection, automotive body control modules, and telecom power entry requiring stable component supply across extended production cycles.
Supply support for SMBJ43A-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, manufacturing, and sales operations across Asia, Europe, and North America.
The SMBJ series belongs to Diodes' transient voltage suppression portfolio, engineered specifically for high-energy surge immunity in industrial automation, automotive electronics, and communications infrastructure.
FAQ
What is the maximum clamping voltage of SMBJ43A-13-F at its rated peak pulse current?
The maximum clamping voltage is 69.4V at 8.6A peak pulse current (IPP), measured using the 8.3ms half-sine waveform per IEC 61000-4-5. This value ensures downstream components rated for ≤70V absolute maximum will remain within safe operating limits during surge events.
Can SMBJ43A-13-F be used in place of a bi-directional TVS like SMBJ43CA-13-F?
No - SMBJ43A-13-F is unidirectional and conducts only during reverse-biased overvoltage. Substituting it for a bi-directional part in AC or bidirectional signal paths (e.g., CAN, RS-485) will leave positive transients unprotected and may cause catastrophic failure due to forward conduction during normal operation.
What is the thermal resistance from junction to lead (RθJL) for SMBJ43A-13-F?
The datasheet specifies steady-state power dissipation of 5.0W at TL = +75°C, implying RθJL ≈ 15°C/W (calculated as (TJmax − TL)/PM(AV) = (150 − 75)/5.0). No explicit RθJL value is published, but this derived figure aligns with SMB package thermal performance benchmarks.
Does SMBJ43A-13-F meet AEC-Q200 stress testing requirements for automotive use?
While SMBJ43A-13-F operates across −55°C to +150°C and is widely deployed in automotive ECUs, Diodes Incorporated does not list it as AEC-Q200-qualified in official documentation. For AEC-Q200-compliant designs, engineers should select the automotive-grade variant SMBJ43AHE3_A/H or verify qualification status directly with Diodes' automotive product team.
SMBJ43A-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
SMBJ43A-13-F FAQ
1.How can I place an order for SMBJ43A-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ43A-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 SMBJ43A-13-F reliable?
The price and inventory of SMBJ43A-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 SMBJ43A-13-F is usually 5 days.
3.What payment methods are accepted for SMBJ43A-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ43A-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ43A-13-F?
SMBJ43A-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ43A-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 SMBJ43A-13-F?
For technical support, including SMBJ43A-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ43A-13-F requirements.
6.How does Aetrix verify that SMBJ43A-13-F is sourced from the original manufacturer or authorized distributors?
All SMBJ43A-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 SMBJ43A-13-F meets industry standards.
7.What is the process for return or replacement of SMBJ43A-13-F?
All SMBJ43A-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ43A-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 SMBJ43A-13-F part is unused and in its original packaging.
Return procedure for SMBJ43A-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ43A-13-F Tags
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ESD9B5.0ST5G
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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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