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Vishay General Semiconductor - Diodes Division SMBJ8.0HE3/52
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- Part No.:
- SMBJ8.0HE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ8.0HE3/52.pdf
- Description:
- TVS DIODE 8VWM 15VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,679
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Product details
Overview
SMBJ8.0HE3/52 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for primary overvoltage protection of DC power rails and signal lines. It features a 8.0 V stand-off voltage (VWM), 8.89–9.83 V breakdown voltage (VBR) at 10 mA, 13.6 V maximum clamping voltage (VC) at 44.1 A peak pulse current (IPPM), and 600 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive power supply inputs, industrial sensor interfaces, and USB port ESD protection.
For engineers reviewing the SMBJ8.0HE3/52 datasheet, SMBJ8.0HE3/52 pinout, SMBJ8.0HE3/52 application, or SMBJ8.0HE3/52 equivalent, key selection criteria include its AEC-Q101 qualification, low clamping ratio (VC/VBR ≈ 1.53), 1.0 µA max reverse leakage at VWM, SMB (DO-214AA) package compatibility with automated SMT placement, and thermal resistance (RθJA = 100 °C/W) under standard PCB pad layout.
Technical Context
The SMBJ8.0HE3/52 operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its specified breakdown range (8.89–9.83 V). Its junction structure is glass passivated for stable surge performance and long-term reliability under repetitive transients.
It delivers 600 W peak pulse power handling per 10/1000 µs waveform with 0.01 % duty cycle, clamps to ≤13.6 V at 44.1 A, and exhibits a temperature coefficient of VBR at +0.069 %/°C - enabling predictable derating above 25 °C ambient per Figure 2 in the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - maximum continuous reverse operating voltage before conduction begins; defines safe DC rail margin for 9–12 V systems. |
| VBR (min/max) | 8.89 V / 9.83 V at IT = 10 mA - verified avalanche onset range; ensures consistent triggering across production lots. |
| VC @ IPPM | 13.6 V at 44.1 A - clamping voltage during worst-case 600 W transient; protects downstream ICs rated ≤15 V absolute max. |
| PPPM | 600 W - peak pulse power capability with 10/1000 µs waveform; meets IEC 61000-4-5 Level 4 surge immunity requirements. |
| ID @ VWM | 1.0 µA max - ultra-low reverse leakage at stand-off voltage; avoids parasitic loading on low-power sensor or battery-backed circuits. |
| TJ max. | +150 °C - maximum junction temperature; supports operation in under-hood automotive and industrial enclosures. |
| Package | SMB (DO-214AA) - standardized surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height; compatible with IPC-7351B density level B. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads; polarity indicated by cathode band (cathode terminal).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., GND or return path); enables unidirectional clamping from cathode to anode during overvoltage events. |
| Cathode | Avalanche conduction terminal | Connected to protected line (e.g., 8 V rail or signal input); conducts surge current to anode when reverse voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance - suitable for engine control units and ADAS power domains. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 combination wave surges up to 4 kV (open-circuit)/2 kA (short-circuit) without degradation when mounted per recommended 5.0 mm × 5.0 mm copper pads. |
| Low clamping ratio (VC/VBR ≈ 1.53) | Minimizes voltage overshoot during clamping - critical for protecting 12 V logic interfaces and microcontroller I/O pins with tight absolute maximum ratings. |
| MSL Level 1 (JEDEC J-STD-020) | Unlimited floor life at ≤30 °C/60 % RH; supports lead-free reflow up to 260 °C peak without moisture-induced popcorning. |
| Glass passivated junction | Ensures stable VBR and low leakage over 10+ years in humid or high-bias industrial environments - no degradation from surface contamination or humidity ingress. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: 12 V battery-fed ECUs exposed to load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Primary TVS clamp placed upstream of LDO regulators and CAN transceivers to limit input voltage to ≤13.6 V during 100 ms surges. Use Value: Prevents regulator latch-up and transceiver damage while maintaining system uptime during vehicle cranking and alternator faults. |
Use Scenario: 4–20 mA current loop sensors in factory automation subject to cable ESD and inductive switching noise. IC Role / Device Role / Timing Role: Unidirectional shunt protector across sensor output terminals to divert fast transients (<1 ns rise time) before reaching ADC front-end. Use Value: Maintains analog measurement accuracy within ±0.1 % full scale by limiting transient-induced offset shift and preventing ADC saturation. |
| USB 2.0 Port ESD Suppression | DC-DC Converter Input Rail Clamp |
|
Use Scenario: Consumer electronics USB ports subjected to ±15 kV air discharge per IEC 61000-4-2. IC Role / Device Role / Timing Role: Low-capacitance TVS (CJ ≈ 200 pF at 0 V) placed between VBUS and GND to clamp ESD pulses before USB controller PHY. Use Value: Passes USB 2.0 eye diagram compliance with <0.5 dB insertion loss at 480 MHz while surviving >1000 ESD strikes. |
Use Scenario: 24 V input to isolated flyback converter in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: Bulk transient suppressor across primary-side input capacitor to absorb switching spikes and lightning-induced surges. Use Value: Extends electrolytic capacitor lifetime by reducing RMS ripple stress and prevents MOSFET avalanche failure during 600 W transient events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.0A-E3/52 | Commercial-grade (non-AEC-Q101); identical VWM, VBR, VC, and PPPM specs; same SMB package. | Lacks automotive qualification testing - unsuitable for under-hood or safety-critical modules. | Select when cost sensitivity outweighs automotive reliability requirements and environmental stress validation is not mandated. |
| SAC8.0 | Lower 400 W PPPM rating; higher VC = 15.0 V at 32 A; same VWM and SMB package; not AEC-Q101 qualified. | Reduced surge margin and higher clamping voltage limit use to non-safety-critical consumer or office equipment. | Choose only if legacy SAC-series inventory exists and 600 W surge immunity is not required per system-level test plan. |
Compared with SMBJ8.0A-E3/52 and SAC8.0, the SMBJ8.0HE3/52 uniquely combines AEC-Q101 qualification, 600 W surge capability, and 13.6 V clamping - making it the sole option for automotive power domain protection where both reliability and precise voltage limiting are mandatory.
Availability
SMBJ8.0HE3/52 is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and USB power delivery systems requiring stable component supply with traceable sourcing and long-term lifecycle support.
Supply support for SMBJ8.0HE3/52 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, and protection devices with emphasis on reliability, surge robustness, and automotive qualification.
The SMBJ series was engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where failure modes must be mitigated without compromising signal integrity or power efficiency.
FAQ
What is the maximum clamping voltage of SMBJ8.0HE3/52 under a 600 W transient?
The SMBJ8.0HE3/52 clamps to a maximum of 13.6 V when subjected to its rated 600 W peak pulse power with a 10/1000 µs waveform. This occurs at a peak pulse current (IPPM) of 44.1 A, as specified in the Electrical Characteristics table on page 2 of Vishay document 88392. The clamping voltage is measured across the device terminals under standardized surge conditions and remains stable across its operational temperature range.
Is SMBJ8.0HE3/52 suitable for bidirectional signal line protection?
No, SMBJ8.0HE3/52 is a unidirectional TVS diode and is not rated for bidirectional operation. Its cathode band indicates polarity, and it conducts only when reverse-biased beyond VBR. For bidirectional protection, Vishay specifies the CA-suffix variant (e.g., SMBJ8.0CA), which has symmetrical breakdown in both directions and no polarity marking. Using SMBJ8.0HE3/52 on AC or differential signal lines risks forward conduction and failure.
Does SMBJ8.0HE3/52 meet automotive qualification standards?
Yes, SMBJ8.0HE3/52 is explicitly AEC-Q101 qualified, as confirmed in the Mechanical Data section and Ordering Information table of Vishay document 88392. The "HE3" suffix denotes RoHS-compliant and AEC-Q101 qualified construction. This includes validation for temperature cycling, high-temperature reverse bias (HTRB), and surge endurance - making it suitable for under-hood and chassis-mounted automotive applications.
What is the thermal resistance of SMBJ8.0HE3/52, and how does it affect PCB layout?
The SMBJ8.0HE3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on the minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, per the Thermal Characteristics table. To maintain TJ ≤ 150 °C under sustained 5.0 W power dissipation, designers must ensure adequate copper area and avoid excessive ambient temperatures - undersized pads will cause premature thermal shutdown or parametric drift.
How does the leakage current of SMBJ8.0HE3/52 impact low-power sensor circuits?
The SMBJ8.0HE3/52 exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 8.0 V stand-off voltage (VWM), as tested per the Electrical Characteristics table. This ultra-low leakage ensures minimal loading on high-impedance sensor outputs or battery-backed monitoring circuits - for example, it introduces <8 nW of standby power loss at 8 V, preserving multi-year battery life in IoT node designs without degrading signal-to-noise ratio.
SMBJ8.0HE3/52 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):
- 8V
- Voltage - Breakdown (Min):
- 8.89V
- Voltage - Clamping (Max) @ Ipp:
- 15V
- Current - Peak Pulse (10/1000µs):
- 40A
- 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)
SMBJ8.0HE3/52 FAQ
1.How can I place an order for SMBJ8.0HE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ8.0HE3/52 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 SMBJ8.0HE3/52 reliable?
The price and inventory of SMBJ8.0HE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ8.0HE3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ8.0HE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ8.0HE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ8.0HE3/52?
SMBJ8.0HE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ8.0HE3/52 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 SMBJ8.0HE3/52?
For technical support, including SMBJ8.0HE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ8.0HE3/52 requirements.
6.How does Aetrix verify that SMBJ8.0HE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ8.0HE3/52 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 SMBJ8.0HE3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ8.0HE3/52?
All SMBJ8.0HE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ8.0HE3/52, 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 SMBJ8.0HE3/52 part is unused and in its original packaging.
Return procedure for SMBJ8.0HE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ8.0HE3/52 Tags
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