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Vishay General Semiconductor - Diodes Division SMBJ43HE3/52
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- Part No.:
- SMBJ43HE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ43HE3/52.pdf
- Description:
- TVS DIODE 43VWM 76.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,464
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Product details
Overview
SMBJ43HE3/52 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed to protect sensitive electronics against ESD, lightning-induced surges, and inductive switching transients. 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 a 10/1000 µs waveform.
For engineers reviewing the SMBJ43HE3/52 datasheet, SMBJ43HE3/52 pinout, SMBJ43HE3/52 application, or SMBJ43HE3/52 equivalent, this device is selected for robust overvoltage protection on DC power rails and signal lines in automotive ECUs, industrial I/O modules, and telecom interface circuits where AEC-Q101 qualification, low clamping ratio, and fast response time (<1 ns) are critical.
Technical Context
The SMBJ43HE3/52 operates as a unidirectional avalanche diode, conducting only in reverse bias above its breakdown threshold to shunt transient energy to ground. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1.0 µA at 43 V), while the low incremental surge resistance enables effective clamping under high-current transients.
Designed for surface-mount assembly on standard PCB pads (0.2" × 0.2"), it delivers thermal performance with RθJA = 100 °C/W and supports continuous operation up to TJ = 150 °C. The HE3 suffix confirms RoHS-compliance and AEC-Q101 qualification-required for automotive-grade reliability in engine control, body electronics, and ADAS sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 43 V - Maximum continuous reverse voltage before significant leakage; defines operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 47.8–52.8 V at 1 mA - Tight tolerance ensures predictable turn-on during transients without premature conduction |
| VC (Clamping Voltage) | 69.4 V at 8.6 A (10/1000 µs) - Limits downstream voltage stress to safe levels for 3.3 V/5 V/12 V ICs and MOSFETs |
| PPPM (Peak Pulse Power) | 600 W - Sustains high-energy surges per IEC 61000-4-5 Level 4 (4 kV) without degradation |
| IPPM (Peak Pulse Current) | 8.6 A - Supports transient suppression on 24 V industrial buses and automotive 12 V systems |
| TJ max. | 150 °C - Enables deployment in under-hood automotive environments and enclosed industrial enclosures |
| Package | SMB (DO-214AA) - Standardized footprint compatible with automated pick-and-place and reflow soldering |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, cathode-banded unidirectional configuration. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H), with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (non-banded end) | Forward current path / reference node | Connected to protected line (e.g., +12 V rail); establishes forward bias direction for normal operation |
| Cathode (banded end) | Transient shunt path / clamping node | Connected to ground or low-impedance return; conducts reverse avalanche current during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, infotainment, and ADAS sensors per stress test requirements |
| 600 W peak pulse power (10/1000 µs) | Withstands IEC 61000-4-5 surge waveforms up to 4 kV without parametric shift or failure |
| Low clamping ratio (VC/VWM ≈ 1.61) | Minimizes overvoltage exposure to downstream components compared to higher-ratio TVS devices |
| Glass-passivated junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity exposure |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V supply inputs in engine control units (ECUs) against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery feed and LDO input to limit transient voltage to ≤69.4 V. Use Value: Prevents damage to 40 V-rated regulators and microcontrollers during 120 V/50 ms load dump events. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loop) in factory-floor pressure/temperature transmitters. IC Role / Device Role / Timing Role: Reverse-biased TVS across signal and ground to absorb ESD and cable-coupled surges. Use Value: Maintains signal integrity by limiting induced transients to <70 V, preserving ADC accuracy and isolator lifetime. |
| Telecom DC Power Input Protection | Consumer Device USB Port Protection |
Use Scenario: Safeguarding 48 V PoE-powered network switches against lightning-induced surges on Ethernet cables. IC Role / Device Role / Timing Role: TVS placed on primary-side DC input after bridge rectifier to clamp common-mode transients. Use Value: Absorbs >600 W surge energy without thermal runaway, enabling compliance with UL 60950-1 and IEC 61000-4-5. |
Use Scenario: Adding secondary-level surge protection on VBUS line of USB-C ports in portable monitors and docking stations. IC Role / Device Role / Timing Role: Unidirectional TVS between VBUS and GND to suppress ESD and hot-swap overshoot. Use Value: Clamps 8 kV contact ESD to <69.4 V within <1 ns, preventing latch-up in USB PD controllers and power switches. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43A-E3/52 | Same electrical specs but commercial-grade (non-AEC-Q101); no automotive qualification testing | Not suitable for automotive production; acceptable for industrial/commercial prototypes | Select when AEC-Q101 is not required and cost optimization is prioritized |
| SMAJ43AHE3/A | Lower peak pulse power (400 W vs. 600 W); SMA package (smaller footprint, higher RθJA) | Limited to lower-energy transients (e.g., IEC 61000-4-2 ESD only); unsuitable for IEC 61000-4-5 Level 4 | Choose only if board space is constrained and surge threat level is limited to ESD and low-energy switching noise |
Compared with SMBJ43A-E3/52 and SMAJ43AHE3/A, the SMBJ43HE3/52 uniquely combines AEC-Q101 qualification, 600 W surge capability, and SMB package thermal robustness-making it the only option qualified for automotive power rail protection where both reliability and high-energy clamping are mandatory.
Availability
SMBJ43HE3/52 is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, and telecom infrastructure equipment requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBJ43HE3/52 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 performance.
The SMBJ series is engineered for high-reliability transient suppression in harsh environments-targeting automotive, industrial, and telecom applications where consistent clamping behavior and AEC-Q101 validation are non-negotiable.
FAQ
What is the clamping voltage of SMBJ43HE3/52 at its rated peak pulse current?
The SMBJ43HE3/52 has a maximum clamping voltage (VC) of 69.4 V at 8.6 A peak pulse current with a 10/1000 µs waveform. This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during surge events. The clamping performance is guaranteed across the full operating temperature range and remains stable due to the device's glass-passivated junction structure.
Is SMBJ43HE3/52 suitable for automotive applications?
Yes, SMBJ43HE3/52 is AEC-Q101 qualified, making it suitable for automotive applications including engine control modules, body electronics, and ADAS sensor interfaces. The HE3 suffix explicitly denotes RoHS-compliant and AEC-Q101-qualified construction. Its 150 °C maximum junction temperature and validated performance under temperature cycling, humidity, and mechanical shock meet automotive reliability requirements.
How does the SMBJ43HE3/52 differ from the SMBJ43A-E3/52?
The SMBJ43HE3/52 and SMBJ43A-E3/52 share identical electrical parameters-including VWM = 43 V, VBR = 47.8–52.8 V, and VC = 69.4 V-but differ in qualification status. SMBJ43HE3/52 is AEC-Q101 qualified and intended for automotive production, whereas SMBJ43A-E3/52 is commercial-grade with no automotive stress testing. Both use the same SMB (DO-214AA) package and RoHS-compliant materials.
What is the maximum reverse leakage current for SMBJ43HE3/52 at its stand-off voltage?
The SMBJ43HE3/52 exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 43 V stand-off voltage (VWM) and 25 °C ambient temperature. This low leakage ensures minimal power loss in standby operation and avoids false triggering in high-impedance sensing circuits. Leakage remains below 5 µA up to 125 °C per datasheet characterization.
Can SMBJ43HE3/52 be used in bidirectional protection configurations?
No, SMBJ43HE3/52 is a unidirectional TVS diode and must be used with correct polarity-cathode connected to ground-to function as a transient clamp. For bidirectional protection, Vishay offers the SMBJ43CA variant (e.g., SMBJ43CAHE3/52), which provides symmetrical clamping in both polarities and uses the "CA" suffix. Using SMBJ43HE3/52 in reverse bias beyond its specified limits risks permanent damage.
SMBJ43HE3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 76.7V
- Current - Peak Pulse (10/1000µs):
- 7.8A
- 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)
SMBJ43HE3/52 FAQ
1.How can I place an order for SMBJ43HE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ43HE3/52 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 SMBJ43HE3/52 reliable?
The price and inventory of SMBJ43HE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ43HE3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ43HE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ43HE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ43HE3/52?
SMBJ43HE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ43HE3/52 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 SMBJ43HE3/52?
For technical support, including SMBJ43HE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ43HE3/52 requirements.
6.How does Aetrix verify that SMBJ43HE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ43HE3/52 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 SMBJ43HE3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ43HE3/52?
All SMBJ43HE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ43HE3/52, 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 SMBJ43HE3/52 part is unused and in its original packaging.
Return procedure for SMBJ43HE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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