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Vishay General Semiconductor - Diodes Division SMBJ43AHE3_B/I
- Part No.:
- SMBJ43AHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ43AHE3_B/I.pdf
- Description:
- 600W,43V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:9,937
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Product details
Overview
SMBJ43AHE3_B/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 43 V stand-off voltage (VWM), 47.8–52.8 V breakdown voltage (VBR) at 1 mA, 69.4 V maximum clamping voltage (VC) at 8.6 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies and automotive ECUs.
For engineers reviewing the SMBJ43AHE3_B/I datasheet, SMBJ43AHE3_B/I pinout, SMBJ43AHE3_B/I application, or SMBJ43AHE3_B/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), junction temperature range (–55 to +150 °C), and compliance with UL 497B and IEC 61000-4-2/4-5 surge immunity standards.
Technical Context
This TVS diode operates as a voltage-clamping protection device triggered by reverse-biased avalanche breakdown. Its glass-passivated junction ensures stable leakage performance (<1 µA at VWM) and fast response time (<1 ns), enabling suppression of ESD, lightning-induced surges, and inductive switching transients before sensitive downstream circuitry is damaged.
The SMBJ43AHE3_B/I is rated for 600 W peak pulse power under standardized 10/1000 µs waveform conditions, with derating above 25 °C per Fig. 2. Its unidirectional configuration requires cathode-band orientation during PCB layout, and it meets MSL Level 1 per J-STD-020 with 260 °C reflow peak temperature tolerance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (min/max) | 47.8 V / 52.8 V at 1 mA - Confirmed breakdown threshold range; ensures reliable turn-on within specified tolerance band. |
| VC @ IPPM | 69.4 V at 8.6 A - Clamped voltage seen by protected circuit during 10/1000 µs surge; limits stress on downstream components. |
| PPPM | 600 W - Peak transient energy handling capability; supports robust protection against IEC 61000-4-5 Level 4 surges. |
| IFSM | 100 A - Non-repetitive forward surge current rating; validates survivability during accidental polarity reversal events. |
| TJ Range | –55 °C to +150 °C - Extended junction temperature operation enables use in under-hood automotive and industrial environments. |
| RθJA | 100 °C/W - Thermal resistance from junction to ambient on standard 0.2" × 0.2" copper pads; informs heatsinking requirements. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band marking on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point in conduction mode | Connected to lower-potential side (e.g., ground or return path); must be routed with low-inductance trace for effective surge shunting. |
| Cathode | Avalanche breakdown terminal under reverse bias | Connected to protected line (e.g., 43 V rail or signal input); band-marked end determines PCB orientation and polarity alignment. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control, ADAS, and infotainment systems. |
| Glass passivated junction | Stable VBR tolerance and low leakage (<1 µA at VWM) over lifetime and temperature extremes. |
| 600 W peak pulse power | Supports IEC 61000-4-5 surge immunity up to 4 kV (line-earth) and 2 kV (line-line) without degradation. |
| MSL Level 1 | Compatible with standard SMT reflow profiles up to 260 °C peak, eliminating moisture sensitivity handling requirements. |
| UL 497B recognition | Approved for use in telecom and industrial signal line protection per Underwriters Laboratories safety standard QVGQ2. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 42 V battery-fed microcontrollers and CAN transceivers from load dump and jump-start transients in 12 V/48 V dual-voltage architectures. IC Role / Device Role / Timing Role: Unidirectional clamping device placed between supply rail and ground, activated within <1 ns upon exceeding 47.8 V. Use Value: Limits transient voltage to ≤69.4 V during 8.6 A surge, preventing latch-up or gate oxide damage in downstream logic and analog ICs. | Use Scenario: Safeguarding analog outputs of pressure/temperature sensors connected to PLC I/O modules exposed to motor drive noise and relay coil kickback. IC Role / Device Role / Timing Role: Standoff-mode protector on 4–20 mA current loop or 0–10 V analog output line, conducting only during overvoltage events. Use Value: Maintains <1 µA leakage at 43 V operating voltage, preserving signal accuracy while suppressing >1 kV transients per IEC 61000-4-4. |
| Telecom DC Power Input Protection | Consumer Device USB Port ESD Suppression |
Use Scenario: Shielding PoE-powered switches and base station RF amplifiers from induced surges on 48 V DC input derived from outdoor cabling. IC Role / Device Role / Timing Role: Primary-level TVS on bulk DC input, coordinated with upstream fuses and secondary-stage filtering. Use Value: Handles 600 W peak pulse energy without failure, enabling compliance with GR-1089-CORE lightning surge requirements. | Use Scenario: Secondary-level protection on VBUS line of USB-C ports in portable monitors and docking stations subjected to human-body-model ESD. IC Role / Device Role / Timing Role: Fast-response clamp limiting VBUS overshoot during ±15 kV contact discharge events. Use Value: Clamps to 69.4 V within nanoseconds, preventing damage to USB PD controllers and Type-C CC logic circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43AHM3_B/I | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification. | No functional difference; selected where halogen-free material compliance is mandated by OEM environmental policy. | Choose when halogen-free bill-of-materials requirement applies; otherwise SMBJ43AHE3_B/I is preferred for cost-sensitive designs. |
| SMCJ43AHE3_A/H | Same VWM/VC ratings but in larger SMC (DO-214AB) package with higher PPPM (1500 W) and lower RθJA (50 °C/W). | Used where higher surge endurance or improved thermal performance is required, e.g., in high-power industrial inverters. | Select SMCJ43AHE3_A/H only if 1500 W rating or enhanced thermal dissipation is needed; SMBJ43AHE3_B/I remains optimal for space-constrained layouts. |
Compared with SMBJ43AHM3_B/I, the SMBJ43AHE3_B/I offers identical protection performance with standard RoHS compliance but excludes halogen-free certification; compared with SMCJ43AHE3_A/H, it trades 900 W lower peak power and higher thermal resistance for 40 % smaller footprint in compact consumer and automotive modules.
Availability
SMBJ43AHE3_B/I is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, telecom power inputs, and consumer USB port protection requiring stable component supply across multi-year production cycles.
Supply support for SMBJ43AHE3_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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, precision, and application-specific validation.
The SMBJ series is engineered for high-reliability transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where consistent clamping behavior and long-term stability are critical.
FAQ
What is the maximum clamping voltage of SMBJ43AHE3_B/I at its rated peak pulse current?
The SMBJ43AHE3_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 10/1000 µs waveform condition. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ43AHE3_B/I maintains this clamping performance across its full operating temperature range of –55 °C to +150 °C.
Is SMBJ43AHE3_B/I qualified for automotive applications?
Yes, SMBJ43AHE3_B/I is AEC-Q101 qualified, having passed stress tests including high-temperature reverse bias, temperature cycling, and ESD per JESD22-A114. This qualification confirms its suitability for automotive powertrain, chassis, and body electronics where reliability under thermal and electrical stress is mandatory. The "HE3" suffix explicitly denotes AEC-Q101 compliance in Vishay's ordering nomenclature.
What does the "B/I" suffix mean in SMBJ43AHE3_B/I?
The "B/I" suffix in SMBJ43AHE3_B/I indicates packaging configuration: "B" denotes the base revision level of the device, and "I" specifies 13-inch diameter plastic tape-and-reel delivery containing 3200 units per reel. This format supports high-volume automated assembly and is distinct from the "H" variant (7-inch reel, 750 units). Both share identical electrical and mechanical specifications.
How does SMBJ43AHE3_B/I differ from bidirectional variants like SMBJ43CA?
SMBJ43AHE3_B/I is unidirectional, featuring a cathode band and conducting only in reverse breakdown, whereas SMBJ43CA is bidirectional with symmetrical clamping in both polarities and no polarity marking. The SMBJ43AHE3_B/I exhibits lower leakage (<1 µA at 43 V) and supports forward surge current (100 A), making it appropriate for DC rail protection; SMBJ43CA suits AC-coupled or differential signal lines where polarity reversal occurs.
What is the thermal resistance of SMBJ43AHE3_B/I, and how does it affect layout?
The SMBJ43AHE3_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 minimal copper area; increasing pad size or adding thermal vias reduces RθJA, improving surge survivability. Layout must maintain the cathode band orientation and avoid solder mask over thermal pads to ensure reliable operation at 150 °C maximum junction temperature.
SMBJ43AHE3_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:
- 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:
- 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)
SMBJ43AHE3_B/I FAQ
1.How can I place an order for SMBJ43AHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ43AHE3_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 SMBJ43AHE3_B/I reliable?
The price and inventory of SMBJ43AHE3_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 SMBJ43AHE3_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ43AHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ43AHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ43AHE3_B/I?
SMBJ43AHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ43AHE3_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 SMBJ43AHE3_B/I?
For technical support, including SMBJ43AHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ43AHE3_B/I requirements.
6.How does Aetrix verify that SMBJ43AHE3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ43AHE3_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 SMBJ43AHE3_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ43AHE3_B/I?
All SMBJ43AHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ43AHE3_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 SMBJ43AHE3_B/I part is unused and in its original packaging.
Return procedure for SMBJ43AHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ43AHE3_B/I Tags
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