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Vishay General Semiconductor - Diodes Division SMBJ43CAHE3/52
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- Part No.:
- SMBJ43CAHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ43CAHE3/52.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,219
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Product details
Overview
SMBJ43CAHE3/52 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. It features a 43 V stand-off voltage (VWM), 47.8–52.8 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), and clamps transients to ≤69.4 V at 8.6 A peak surge current - deployed on signal lines and power rails in industrial sensor interfaces and telecom equipment.
For engineers reviewing the SMBJ43CAHE3/52 datasheet, SMBJ43CAHE3/52 pinout, SMBJ43CAHE3/52 application, or SMBJ43CAHE3/52 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), low leakage (<1.0 µA at VWM), and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
This device operates as a voltage-clamping protector using an avalanche junction structure, responding within <1 ps to transient overvoltages. Its bidirectional symmetry enables protection of AC-coupled or differential signal paths without polarity constraints, and its glass-passivated chip junction ensures stable performance under repeated surge stress.
The SMBJ43CAHE3/52 is rated for -55 °C to +150 °C operating junction temperature, meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), and delivers 600 W peak pulse power with 0.01% duty cycle - validated under standardized 10/1000 µs waveform testing per ANSI/IEEE C62.35.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - maximum continuous reverse working voltage before clamping initiates; defines safe operating margin for 36–48 V nominal systems. |
| VBR (min/max) | 47.8 V / 52.8 V at IT = 1 mA - guaranteed breakdown range ensures predictable turn-on across manufacturing lot and temperature. |
| VC @ IPPM | ≤69.4 V at 8.6 A - clamping voltage limits downstream IC stress during 600 W transient events. |
| IPPM | 8.6 A (10/1000 µs) - peak surge current capacity directly supports IEC 61000-4-5 Level 4 immunity requirements. |
| ID @ VWM | ≤1.0 µA - ultra-low leakage preserves signal integrity and battery life in high-impedance sensor front-ends. |
| TJ max. | +150 °C - enables operation in under-hood automotive or industrial enclosures without derating. |
| RθJA | 100 °C/W - thermal resistance informs board-level copper pad design (0.2" × 0.2") for sustained power dissipation. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Matte tin-plated leads, RoHS-compliant and AEC-Q101 qualified (HE3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | Accepts surge current from either direction; connects to protected line (e.g., RS-485 A/B or CAN H/L). |
| Cathode | Transient current entry (bidirectional) | Completes low-impedance path to ground during clamping; symmetric with Anode in CA devices. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 surge immunity up to Level 4 (4 kV line-to-ground) without external series impedance. |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive-grade reliability including temperature cycling, humidity bias, and surge endurance per stress test plan. |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free reflow assembly without moisture sensitivity concerns or baking requirements. |
| Glass passivated junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity exposure. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ESD or inductive switch-off). |
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 relay switching noise and cable ESD. IC Role / Device Role / Timing Role: Bidirectional clamping TVS placed at connector entry point, shunting transients to chassis ground before reaching ADC or microcontroller GPIO. Use Value: Maintains signal fidelity by limiting induced voltages to ≤69.4 V, preventing latch-up or permanent damage to 3.3 V/5 V interface ICs. |
Use Scenario: Safeguarding LIN bus transceivers and power window motor drivers against load dump and alternator ripple in vehicle door modules. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 12 V supply rail and LIN data line, operating alongside ceramic decoupling capacitors. Use Value: Withstands repetitive 600 W surges and operates reliably from -40 °C to +125 °C ambient, meeting ISO 7637-2 Pulse 1/2a/5a requirements. |
| Telecom Power Supply Input | Consumer USB-C Port Protection |
|
Use Scenario: Input-stage surge suppression on 48 V DC-DC converters in PoE-powered network switches and base stations. IC Role / Device Role / Timing Role: First-line defense against lightning-induced surges on primary-side DC input, coordinated with upstream fuses and MOVs. Use Value: Clamps 48 V rail transients to <70 V within nanoseconds, preserving MOSFET gate oxide integrity and enabling compact heatsink-free design. |
Use Scenario: Bidirectional protection of USB-C CC and VBUS lines against hot-plug ESD and accidental 20 V adapter misconnection. IC Role / Device Role / Timing Role: Low-capacitance TVS placed adjacent to connector, guarding Type-C controller and power delivery ICs. Use Value: Sub-1 µA leakage at 20 V VWM prevents false detection, while 69.4 V clamping protects 20 V-rated PD controllers during fault conditions. |
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-M3/52 | Same electrical specs, halogen-free RoHS-compliant variant (HM3 suffix not used; M3 denotes halogen-free commercial grade). | Lacks AEC-Q101 qualification; suitable for industrial/commercial but not automotive end-equipment. | Select when automotive qualification is unnecessary and halogen-free compliance is mandated by OEM material declaration. |
| SMCJ43CAHE3/52 | Same VWM/VBR/VC, but SMC (DO-214AB) package: larger footprint, higher 1500 W PPPM, RθJA = 50 °C/W. | Better thermal performance and surge handling, but requires PCB redesign due to 2.54 mm longer body and wider terminals. | Choose when system-level surge tests exceed 600 W or sustained power dissipation demands lower thermal resistance. |
Compared with SMBJ43CAHE3/52, the M3/52 alternative trades automotive qualification for halogen-free compliance, while the SMCJ43CAHE3/52 offers higher surge robustness at the cost of board space - neither is pin-compatible, requiring layout revision for substitution.
Availability
SMBJ43CAHE3/52 is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, telecom power inputs, and consumer USB-C port protection requiring stable component supply across production lifecycles.
Supply support for SMBJ43CAHE3/52 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, efficiency, and application-specific optimization.
The SMBJ series targets high-reliability transient suppression in space-constrained SMT designs, with HE3 variants engineered specifically for automotive electronics meeting AEC-Q101 stress test requirements.
FAQ
What is the clamping voltage of SMBJ43CAHE3/52 at its rated peak pulse current?
The SMBJ43CAHE3/52 clamps to a maximum of 69.4 V when subjected to its rated 8.6 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is measured at TA = 25 °C on specified copper pad layout and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is SMBJ43CAHE3/52 suitable for automotive applications?
Yes, SMBJ43CAHE3/52 is AEC-Q101 qualified, as confirmed by the "HE3" suffix in its ordering code. It undergoes rigorous stress testing including temperature cycling, high-temperature operating life, and surge endurance per the AEC-Q101 standard - making it appropriate for use in automotive body control modules, infotainment power supplies, and sensor interfaces where reliability under harsh environmental conditions is mandatory.
What does the "CA" suffix indicate in SMBJ43CAHE3/52?
The "CA" suffix in SMBJ43CAHE3/52 denotes a bidirectional configuration: the device provides symmetrical transient suppression for both positive and negative voltage excursions relative to ground. Unlike unidirectional "A" variants, it has no cathode marking and functions identically in either polarity - ideal for protecting AC-coupled lines such as RS-485, CAN, or audio signals where polarity reversal may occur.
How does the thermal resistance of SMBJ43CAHE3/52 affect PCB layout?
The SMBJ43CAHE3/52 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. To maintain safe junction temperatures under repetitive surge conditions, designers must allocate sufficient copper area and avoid excessive trace length or isolation - undersized pads will cause thermal derating and reduced surge endurance over time.
What is the maximum leakage current of SMBJ43CAHE3/52 at its stand-off voltage?
At its 43 V stand-off voltage (VWM), the SMBJ43CAHE3/52 exhibits a maximum reverse leakage current (ID) of 1.0 µA at TA = 25 °C. This ultra-low leakage ensures minimal loading on high-impedance circuits such as sensor bias networks or battery-powered monitoring nodes, preserving accuracy and extending operational battery life without compromising protection performance.
SMBJ43CAHE3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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)
SMBJ43CAHE3/52 FAQ
1.How can I place an order for SMBJ43CAHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ43CAHE3/52 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 SMBJ43CAHE3/52 reliable?
The price and inventory of SMBJ43CAHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ43CAHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ43CAHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ43CAHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ43CAHE3/52?
SMBJ43CAHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ43CAHE3/52 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 SMBJ43CAHE3/52?
For technical support, including SMBJ43CAHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ43CAHE3/52 requirements.
6.How does Aetrix verify that SMBJ43CAHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ43CAHE3/52 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 SMBJ43CAHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ43CAHE3/52?
All SMBJ43CAHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ43CAHE3/52, 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 SMBJ43CAHE3/52 part is unused and in its original packaging.
Return procedure for SMBJ43CAHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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