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Vishay General Semiconductor - Diodes Division SMBJ43CAHE3_B/I
- Part No.:
- SMBJ43CAHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ43CAHE3_B/I.pdf
- Description:
- 600W,43V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:7,729
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Product details
Overview
SMBJ43CAHE3_B/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, rated for 43 V standoff voltage (VWM), 69.4 V maximum clamping voltage (VC) at 8.6 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 µs waveform). It protects signal lines and power rails in sensor interfaces, industrial I/O modules, and telecom front-end circuits against ESD and inductive switching transients.
For engineers reviewing the SMBJ43CAHE3_B/I datasheet, SMBJ43CAHE3_B/I pinout, SMBJ43CAHE3_B/I application, or SMBJ43CAHE3_B/I equivalent, this device delivers verified bidirectional clamping performance, AEC-Q101 qualification for automotive-grade reliability, and MSL Level 1 moisture sensitivity - critical for high-reliability board-level surge protection design and BOM validation.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with breakdown voltage (VBR) specified at 47.8–52.8 V (min/max) under 1 mA test current. Its low incremental surge resistance ensures stable clamping during fast transients, and its 100 °C/W junction-to-ambient thermal resistance supports operation up to +150 °C junction temperature without forced cooling.
The device uses a glass-passivated silicon junction and matte tin-plated leads compliant with J-STD-002 and JESD 22-B102. It meets UL 497B recognition (QVGQ2) and is halogen-free, RoHS-compliant, and qualified per AEC-Q101 - distinguishing it from commercial-grade variants like E3/M3 suffixes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe operating margin for 36–42 V nominal systems. |
| VBR (min/max) | 47.8 V / 52.8 V - Breakdown occurs within this range at 1 mA; ensures predictable turn-on across production lot and temperature. |
| VC @ IPPM | 69.4 V - Clamped voltage at 8.6 A peak pulse (10/1000 µs); limits downstream IC stress during 600 W transient events. |
| IPPM | 8.6 A - Peak surge current capability under standard 10/1000 µs waveform; determines minimum trace width and PCB copper area needed. |
| PPPM | 600 W - Peak pulse power rating; defines energy-handling capacity for lightning-induced surges and relay coil flyback. |
| TJ max. | +150 °C - Maximum junction temperature; enables use in under-hood automotive or high-ambient industrial enclosures. |
| MSL Level | Level 1 (per J-STD-020) - No floor life limitation; can be stored indefinitely and reflowed at peak 260 °C without baking. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, 2-terminal case with no polarity marking (bidirectional configuration).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | Accepts reverse surge current during negative transients; forms symmetrical clamping path with cathode. |
| Cathode | Transient current entry (positive polarity) | Accepts forward surge current during positive transients; completes bidirectional conduction path. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., RS-485, CAN, Ethernet PHY) without polarity concerns. |
| AEC-Q101 qualification | Validated for automotive applications including body control modules and ADAS sensor interfaces where reliability over temperature and lifetime is mandatory. |
| 600 W peak pulse power (10/1000 µs) | Withstands IEC 61000-4-5 Level 3 (1 kV/2 Ω) surge events on 24 V industrial buses without degradation. |
| Low clamping ratio (VC/VWM = 1.61) | Minimizes overvoltage stress on protected ICs - e.g., keeps 3.3 V or 5 V logic inputs below absolute maximum ratings during clamping. |
| MSL Level 1 & lead finish | Eliminates pre-bake requirements and ensures solder joint integrity in high-volume SMT assembly with J-STD-002-compliant wetting. |
Applications
| Industrial Sensor Interface | Automotive Body Control Module |
|---|---|
|
Use Scenario: Protecting analog output lines (4–20 mA) and digital I/O (CAN/LIN) in factory-floor pressure/temperature sensors exposed to motor drive noise and relay switching. IC Role / Device Role / Timing Role: Bidirectional TVS placed at connector entry point to shunt transients before reaching precision ADCs or microcontroller GPIOs. Use Value: Prevents latch-up or permanent damage to 12-bit SAR ADCs and 32-bit ARM Cortex-M MCUs by limiting induced spikes to ≤69.4 V. |
Use Scenario: Safeguarding LIN bus transceivers and LED driver outputs in door module ECUs subjected to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Primary clamping device on 12 V supply rail and LIN signal line, coordinated with upstream fuse and downstream L-C filter. Use Value: Maintains functional safety compliance (ISO 26262 ASIL-B) by ensuring <100 ns response time and surviving 1000+ surge cycles per AEC-Q101 stress profile. |
| Telecom Power Feeding Port | Consumer USB-C ESD Protection |
|
Use Scenario: Surge suppression on 48 V PoE (Power over Ethernet) feeding ports in IP cameras and wireless access points. IC Role / Device Role / Timing Role: Secondary-level TVS after primary GDT or polymer PTC, clamping residual transients coupled onto DC feed lines. Use Value: Limits voltage overshoot to <70 V during IEC 61000-4-5 4 kV combo wave tests, protecting IEEE 802.3af/at PD controller ICs. |
Use Scenario: Board-level ESD protection for USB-C CC and VBUS lines in portable audio docks and docking stations. IC Role / Device Role / Timing Role: Fast-response TVS placed adjacent to connector, absorbing ±15 kV HBM ESD pulses before reaching USB PD controller. Use Value: Achieves IEC 61000-4-2 Level 4 (±15 kV air/±8 kV contact) immunity while adding <0.5 pF capacitance - no signal integrity impact on 10 Gbps SuperSpeed signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43CA-E3/52 | Commercial-grade (non-AEC-Q101), same VWM/VC/PPPM, but lacks automotive qualification and uses standard RoHS plating. | Suitable for consumer or industrial non-automotive designs where AEC-Q101 is not mandated. | Select when cost sensitivity outweighs automotive reliability requirements and MSL Level 1 suffices. |
| SMCJ43CAHE3_A/H | Same AEC-Q101 qualification and electrical specs, but in larger SMC (DO-214AB) package with higher IPPM (13.7 A) and 1500 W PPPM. | Used where higher surge margin is required (e.g., outdoor telecom equipment), but requires larger PCB footprint. | Choose when system-level surge testing exceeds IEC 61000-4-5 Level 4 and layout allows SMC footprint. |
Compared with SMBJ43CA-E3/52, SMBJ43CAHE3_B/I adds AEC-Q101 qualification and enhanced process controls for automotive use; compared with SMCJ43CAHE3_A/H, it trades surge headroom for space-constrained layouts - making SMBJ43CAHE3_B/I optimal for compact, automotive-qualified PCBs needing 600 W protection.
Availability
SMBJ43CAHE3_B/I is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, telecom power feeding ports, and consumer USB-C ESD protection requiring stable component supply, long-term lifecycle support, and AEC-Q101 traceability.
Supply support for SMBJ43CAHE3_B/I 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, MOSFETs, optoelectronics, and passive components with emphasis on reliability, power efficiency, and automotive-grade qualification.
The SMBJ series is part of Vishay's TRANSZORB® TVS platform designed specifically for robust, standardized transient suppression in space-constrained, high-reliability applications across automotive, industrial, and communications markets.
FAQ
What is the clamping voltage of SMBJ43CAHE3_B/I at its rated peak pulse current?
The SMBJ43CAHE3_B/I has a maximum clamping voltage (VC) of 69.4 V at its rated peak pulse current (IPPM) of 8.6 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that downstream circuitry sees no more than 69.4 V during a full-power transient event. The SMBJ43CAHE3_B/I maintains this clamping performance across its full operating temperature range (−55 °C to +150 °C).
Is SMBJ43CAHE3_B/I suitable for automotive applications?
Yes, SMBJ43CAHE3_B/I is AEC-Q101 qualified and manufactured with automotive-grade process controls, including enhanced wafer-level screening and extended temperature cycling validation. Its halogen-free, RoHS-compliant construction and MSL Level 1 rating meet stringent automotive assembly and field reliability requirements. The SMBJ43CAHE3_B/I is explicitly listed in Vishay's automotive ordering codes (HE3 suffix) and approved for use in body control modules, sensor nodes, and infotainment power rails.
How does the bidirectional configuration of SMBJ43CAHE3_B/I affect its placement on the PCB?
The SMBJ43CAHE3_B/I has no polarity marking and conducts identically in both directions, allowing placement across any two-point node without orientation concern - ideal for AC-coupled lines like RS-485 differential pairs or transformer-isolated power feeds. Unlike unidirectional TVS diodes, it eliminates risk of incorrect orientation during automated placement and simplifies layout for floating or dual-polarity rails. The SMBJ43CAHE3_B/I achieves this via symmetrical junction design, not internal series back-to-back diodes.
What is the thermal resistance of SMBJ43CAHE3_B/I, and how does it impact board layout?
The SMBJ43CAHE3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes minimum recommended pad layout per Vishay's datasheet Figure 6. To maintain TJ ≤ 150 °C under worst-case 5.0 W steady-state dissipation, designers must ensure adequate copper area and avoid thermal bottlenecks - the SMBJ43CAHE3_B/I does not require heatsinking for transient-only operation but benefits from thermal relief in high-duty-cycle scenarios.
Does SMBJ43CAHE3_B/I meet UL recognition standards?
Yes, SMBJ43CAHE3_B/I carries Underwriters Laboratories recognition under UL 497B (QVGQ2) for protector classification, with file number E136766 covering both unidirectional and bidirectional variants. This certification confirms compliance for use in telecommunications and data line protection applications where third-party safety approval is mandated. The SMBJ43CAHE3_B/I satisfies insulation, flammability (UL 94 V-0 molding compound), and surge withstand requirements defined in UL 497B Section 7.
SMBJ43CAHE3_B/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ43CAHE3_B/I FAQ
1.How can I place an order for SMBJ43CAHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ43CAHE3_B/I 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 SMBJ43CAHE3_B/I reliable?
The price and inventory of SMBJ43CAHE3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ43CAHE3_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ43CAHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ43CAHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ43CAHE3_B/I?
SMBJ43CAHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ43CAHE3_B/I 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 SMBJ43CAHE3_B/I?
For technical support, including SMBJ43CAHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ43CAHE3_B/I requirements.
6.How does Aetrix verify that SMBJ43CAHE3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ43CAHE3_B/I 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 SMBJ43CAHE3_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ43CAHE3_B/I?
All SMBJ43CAHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ43CAHE3_B/I, 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 SMBJ43CAHE3_B/I part is unused and in its original packaging.
Return procedure for SMBJ43CAHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ43CAHE3_B/I Tags
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