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Vishay General Semiconductor - Diodes Division SMBJ43CAHE3_A/I
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- Part No.:
- SMBJ43CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ43CAHE3_A/I.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,914
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Product details
Overview
SMBJ43CAHE3_A/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal or power lines. It features a 43 V stand-off voltage (VWM), 69.4 V maximum clamping voltage (VC) at 8.6 A peak pulse current (IPPM), and 600 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed in automotive sensor interfaces, industrial I/O protection, and telecom line surge suppression.
For engineers reviewing the SMBJ43CAHE3_A/I datasheet, SMBJ43CAHE3_A/I pinout, SMBJ43CAHE3_A/I application, or SMBJ43CAHE3_A/I equivalent, this device serves as a robust, AEC-Q101-qualified transient protector for bidirectional AC-coupled or floating signal paths where low clamping voltage, fast response (<1 ns), and repeatable surge handling are critical.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with breakdown voltage (VBR) ranging from 47.8 V to 52.8 V at 1 mA test current and ±0.102 %/°C temperature coefficient. Its glass-passivated junction ensures stable avalanche performance under repetitive 10/1000 µs surges at 0.01 % duty cycle.
Thermal design relies on RθJA = 100 °C/W (typ.) and RθJL = 20 °C/W (typ.), requiring minimum 5.0 mm × 5.0 mm copper pads per terminal for rated PPPM. The device meets MSL Level 1 (260 °C reflow peak) and is halogen-free RoHS-compliant with matte tin-plated leads solderable per J-STD-002.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 36–48 V nominal systems. |
| VBR min/max | 47.8 V / 52.8 V at IT = 1 mA - Confirmed bidirectional breakdown range; ensures symmetrical clamping onset across polarity. |
| VC @ IPPM | 69.4 V at 8.6 A - Clamped voltage during 10/1000 µs surge; limits downstream IC stress to sub-70 V under full-rated transient. |
| PPPM | 600 W - Peak pulse power handling with standard 10/1000 µs waveform; supports IEC 61000-4-5 Level 3/4 surge immunity testing. |
| ID @ VWM | 1.0 µA - Ultra-low reverse leakage at stand-off voltage; prevents signal distortion or bias shift in high-impedance sensor lines. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive or industrial enclosures without derating. |
| Package | SMB (DO-214AA) - Surface-mount outline with 5.59 mm × 4.06 mm footprint; compatible with automated pick-and-place and reflow assembly. |
Pinout & Package
Package: SMB (DO-214AA), bidirectional configuration - no polarity marking; terminals are symmetrical anode/cathode pair.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Either terminal may serve as anode or cathode depending on instantaneous polarity; no band marking required. |
| Terminal 2 | Anode/Cathode (bidirectional) | Electrically identical to Terminal 1; forms symmetrical clamping path across protected line pair (e.g., RS-485 A/B). |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and ADAS sensor interfaces per stress test requirements. |
| 600 W peak pulse power | Withstands repeated 10/1000 µs transients up to 600 W without degradation - sufficient for ISO 7637-2 Pulse 1/2/5a/b compliance. |
| Low clamping ratio (VC/VWM = 1.61) | Delivers tight voltage limiting relative to stand-off level - reduces overvoltage stress on downstream 48 V-rated transceivers or ADC inputs. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and single-reflow processing at 260 °C peak - eliminates baking requirements in high-volume SMT lines. |
| Glass passivated junction | Ensures stable avalanche characteristics and long-term reliability under thermal cycling and humidity exposure. |
Applications
| Automotive Sensor Interface | Industrial RS-485 Bus Protection |
|---|---|
|
Use Scenario: Protecting CAN FD or LIN transceiver I/O pins from load dump and inductive switching spikes in vehicle body control modules. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point, shunting transients before reaching PHY layer. Use Value: Maintains signal integrity under ISO 16750-2 load dump (120 V/1 s) and ISO 7637-2 Pulse 5b (75 V/300 ms) while preserving <1 ns response. |
Use Scenario: Safeguarding differential data lines in factory automation PLCs exposed to motor drive EMI and ground bounce. IC Role / Device Role / Timing Role: Common-mode TVS across RS-485 A/B lines, referenced to local ground, absorbing common-mode surges up to ±30 kV contact discharge. Use Value: Limits clamped voltage to ≤69.4 V, keeping transceiver inputs within absolute maximum rating while supporting >500 kbps data rates. |
| Telecom DSL Line Protection | Consumer Appliance Motor Control |
|
Use Scenario: Shielding ADSL/VDSL line drivers from lightning-induced surges entering via outdoor copper pairs. IC Role / Device Role / Timing Role: Primary protection stage ahead of G.992.x line interface ICs; paired with gas discharge tube (GDT) for staged coordination. Use Value: Fast response captures initial surge edge before GDT fires, reducing let-through energy by >40 % compared to GDT-only solutions. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in smart home appliances (e.g., vacuum cleaners, blenders). IC Role / Device Role / Timing Role: Across motor terminals or H-bridge outputs, clamping flyback voltages generated during PWM switching. Use Value: Handles 100 A non-repetitive forward surge (IFSM) and dissipates 600 W pulses without latch-up, extending MOSFET lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43CAHM3_A/I | Halogen-free variant with identical electrical specs and AEC-Q101 qualification; same SMB package and thermal profile. | No functional difference; selected when halogen-free compliance is mandated by OEM environmental policy. | Direct material substitution where RoHS + halogen-free requirements apply; no layout or validation change needed. |
| SMCJ43CAHE3_A/I | Same VWM (43 V) and VC (69.4 V), but in larger SMC (DO-214AB) package with 1500 W PPPM rating and lower RθJA (50 °C/W). | Used where higher surge endurance (>1500 W) or improved thermal dissipation is required, e.g., in outdoor telecom cabinets. | Choose when system-level surge testing exceeds 600 W or ambient temperature exceeds 105 °C; requires PCB pad revision. |
Compared with SMBJ43CAHE3_A/I, SMBJ43CAHM3_A/I offers identical protection performance with halogen-free construction, while SMCJ43CAHE3_A/I provides 2.5× higher pulse power and better thermal management at the cost of larger footprint and revised layout.
Availability
SMBJ43CAHE3_A/I is available at Aetrix Electronics and suitable for automotive electronics, industrial communication interfaces, and consumer appliance designs requiring stable component supply with AEC-Q101 assurance and traceable sourcing.
Supply support for SMBJ43CAHE3_A/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, and protection devices with emphasis on reliability, automotive qualification, and high-volume manufacturability.
The SMBJ series was developed specifically for surface-mount transient suppression in space-constrained, high-reliability applications - balancing low clamping voltage, fast response, and AEC-Q101 compliance for automotive and industrial use.
FAQ
What is the clamping voltage of SMBJ43CAHE3_A/I at its rated peak pulse current?
The SMBJ43CAHE3_A/I has a maximum clamping voltage (VC) of 69.4 V when subjected to its rated peak pulse current (IPPM) of 8.6 A using the standard 10/1000 µs waveform. This value is measured under defined test conditions per ANSI/IEEE C62.35 and ensures predictable overvoltage limiting for protected circuits. The SMBJ43CAHE3_A/I maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMBJ43CAHE3_A/I suitable for automotive applications?
Yes, SMBJ43CAHE3_A/I is AEC-Q101 qualified and explicitly designated for automotive use with suffix "HE3" indicating RoHS-compliant and AEC-Q101-qualified construction. It meets stress test requirements for temperature cycling, humidity, and mechanical shock relevant to engine bay and cabin electronics. The SMBJ43CAHE3_A/I is commonly deployed in body control modules, sensor signal conditioning, and infotainment power rail protection.
How does the bidirectional configuration of SMBJ43CAHE3_A/I affect its placement in circuit design?
The SMBJ43CAHE3_A/I has no polarity marking and functions identically in both directions, making it ideal for protecting AC-coupled or floating differential lines such as RS-485, CAN, or audio signals. Unlike unidirectional TVS diodes, it requires no orientation check during placement - simplifying assembly and eliminating risk of reverse installation. The SMBJ43CAHE3_A/I is placed directly across the protected nodes without reference to ground or supply rails.
What is the maximum reverse leakage current of SMBJ43CAHE3_A/I at its stand-off voltage?
The SMBJ43CAHE3_A/I exhibits a maximum reverse leakage current (ID) of 1.0 µA when biased at its 43 V stand-off voltage (VWM) and tested at 25 °C. This ultra-low leakage preserves signal integrity in high-impedance sensor front-ends and prevents unwanted loading on precision analog circuits. The SMBJ43CAHE3_A/I maintains leakage below 5 µA even at +125 °C, ensuring stability across extended temperature ranges.
Does SMBJ43CAHE3_A/I require special PCB layout considerations for thermal performance?
Yes - to achieve its rated 600 W peak pulse power, the SMBJ43CAHE3_A/I must be mounted on minimum recommended copper pads: 0.2" × 0.2" (5.0 mm × 5.0 mm) per terminal, per Vishay's datasheet Figure 2. Smaller pads cause thermal derating; for example, at 75 °C ambient, power capability drops to ~350 W with standard 1.5 mm² pads. The SMBJ43CAHE3_A/I thermal resistance (RθJA = 100 °C/W) assumes this layout, and deviation directly impacts surge survivability.
SMBJ43CAHE3_A/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:
- Obsolete
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ43CAHE3_A/I FAQ
1.How can I place an order for SMBJ43CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ43CAHE3_A/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_A/I reliable?
The price and inventory of SMBJ43CAHE3_A/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_A/I is usually 5 days.
3.What payment methods are accepted for SMBJ43CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ43CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ43CAHE3_A/I?
SMBJ43CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ43CAHE3_A/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_A/I?
For technical support, including SMBJ43CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ43CAHE3_A/I requirements.
6.How does Aetrix verify that SMBJ43CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMBJ43CAHE3_A/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_A/I meets industry standards.
7.What is the process for return or replacement of SMBJ43CAHE3_A/I?
All SMBJ43CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ43CAHE3_A/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_A/I part is unused and in its original packaging.
Return procedure for SMBJ43CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ43CAHE3_A/I Tags
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DESD3V3E1BL-7B
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