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Vishay General Semiconductor - Diodes Division SMBJ8.0A-E3/52
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- Part No.:
- SMBJ8.0A-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ8.0A-E3/52.pdf
- Description:
- TVS DIODE 8VWM 13.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,180
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Product details
Overview
SMBJ8.0A-E3/52 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 at 1 mA, 13.6 V maximum clamping voltage at 44.1 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed in industrial sensor interfaces and automotive body control modules.
For engineers reviewing the SMBJ8.0A-E3/52 datasheet, SMBJ8.0A-E3/52 pinout, SMBJ8.0A-E3/52 application, or SMBJ8.0A-E3/52 equivalent, key selection criteria include clamping performance under 44.1 A surge, thermal resistance (RθJA = 100 °C/W), unidirectional polarity marking, SMB (DO-214AA) package compatibility, and AEC-Q101 qualification path via HE3 suffix variants.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VBR, it avalanches to divert transient energy away from downstream ICs. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at 8.0 V), while the low incremental surge resistance enables rapid response to sub-microsecond transients induced by inductive switching or ESD events.
The device is rated for repetitive 600 W pulses at 0.01% duty cycle, derated linearly above 25 °C ambient per Fig. 2, and supports mounting on 5.0 mm × 5.0 mm copper pads per JEDEC standard layout. Polarity is marked by a cathode band; no marking applies to bidirectional versions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - Maximum continuous reverse operating voltage before significant leakage; sets safe margin below system rail (e.g., 9–12 V supply) |
| VBR @ IT = 1 mA | 8.89–9.83 V - Verified breakdown range ensuring reliable turn-on during transients without premature conduction |
| VC @ IPPM = 44.1 A | 13.6 V - Clamped voltage seen by protected circuit during 10/1000 µs surge; defines worst-case stress on downstream components |
| PPPM | 600 W - Peak pulse power handling capability with standardized 10/1000 µs waveform; validates robustness against lightning-induced surges |
| IPPM | 44.1 A - Maximum non-repetitive surge current the device sustains without failure; determines minimum trace width and fuse coordination |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on recommended PCB pad layout; informs derating requirements above 25 °C ambient |
| TJmax | +150 °C - Maximum junction temperature; enables operation in under-hood automotive or industrial enclosures |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Cathode identified by a single band on the body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference | Connected to system ground or lower-potential node; defines reference for clamping action |
| Cathode | Reverse voltage input / Surge current sink | Connected to protected line (e.g., 8–12 V rail); conducts avalanche current to ground during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Validates immunity to IEC 61000-4-5 Level 4 surges (4 kV line-to-ground) when properly laid out |
| Clamping voltage ≤13.6 V at 44.1 A | Ensures protected 3.3 V or 5 V logic ICs remain within absolute maximum ratings during surge events |
| Low leakage <1.0 µA at 8.0 V | Minimizes standby power loss and avoids false triggering in high-impedance sensor bias networks |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements |
| AEC-Q101 qualified variant available (HE3 suffix) | Enables drop-in use in automotive ECUs requiring certified reliability for powertrain and chassis applications |
Applications
| Industrial Sensor Interface | Automotive Body Control Module |
|---|---|
|
Use Scenario: Protecting analog output lines (e.g., 4–20 mA loop drivers) from load dump and relay coil flyback in factory automation PLCs. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between signal line and ground, clamping transients within 1 ns. Use Value: Limits voltage excursion to ≤13.6 V during 44.1 A surges, preserving ADC input integrity and preventing op-amp latch-up. |
Use Scenario: Safeguarding LIN bus transceivers and microcontroller I/O pins against battery reverse connection and jump-start spikes. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 12 V supply rail feeding BCU power management ICs. Use Value: Withstands 600 W pulses without degradation, enabling compliance with ISO 7637-2 Pulse 1/2a/5a test profiles. |
| Consumer Power Adapter Output | Telecom PoE Midspan Protection |
|
Use Scenario: Secondary-side surge suppression on 5 V/9 V/12 V USB-C PD adapter outputs exposed to accidental short-circuit transients. IC Role / Device Role / Timing Role: Fast-acting crowbar element that diverts >40 A surges before downstream USB controller resets. Use Value: 13.6 V clamping ensures connected devices (e.g., smartphones, tablets) remain within USB PD VBUS tolerance limits. |
Use Scenario: DC feed line protection in IEEE 802.3af/at midspan injectors where 48 V PoE lines are susceptible to lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Unidirectional TVS on each PSE output pair, referenced to local ground plane. Use Value: 600 W rating handles induced surges up to 100 Vpk without thermal runaway, maintaining IEEE 802.3 compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.0CA-E3/52 | Bidirectional; symmetric VBR = 8.89–9.83 V; same VC = 13.6 V, but clamps in both polarities | Required for AC-coupled or floating signal lines (e.g., RS-485, CAN bus) where polarity reversal occurs | Select SMBJ8.0CA-E3/52 only if bidirectional clamping is needed; otherwise SMBJ8.0A-E3/52 offers lower leakage and simpler grounding |
| SMCJ8.0A-E3/57 | Larger SMC (DO-214AB) package; higher PPPM = 1500 W; same VWM/VBR/VC specs but 10× higher IPPM (100 A) | Suitable for higher-energy threats (e.g., automotive alternator load dump) where PCB space allows larger footprint | Choose SMCJ8.0A-E3/57 only when 600 W is insufficient; SMBJ8.0A-E3/52 remains optimal for space-constrained 44.1 A surge protection |
Compared with SMBJ8.0CA-E3/52 and SMCJ8.0A-E3/57, SMBJ8.0A-E3/52 delivers optimal balance of compact SMB footprint, verified 44.1 A surge handling, and low-leakage unidirectional clamping - making it the preferred choice for DC rail protection where polarity is fixed and board area is constrained.
Availability
SMBJ8.0A-E3/52 is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, consumer power adapter outputs, and telecom PoE midspan protection requiring stable component supply and RoHS-compliant commercial-grade TVS diodes.
Supply support for SMBJ8.0A-E3/52 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, power efficiency, and automotive qualification.
The SMBJ series is engineered for robust transient suppression in harsh environments - targeting industrial automation, automotive electronics, and communications infrastructure where consistent clamping performance and long-term stability are critical.
FAQ
What is the maximum clamping voltage of SMBJ8.0A-E3/52 at its rated peak pulse current?
The SMBJ8.0A-E3/52 has a maximum clamping voltage (VC) of 13.6 V when subjected to its rated peak pulse current (IPPM) of 44.1 A using the standard 10/1000 µs waveform. This value is measured under controlled test conditions per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ8.0A-E3/52 maintains this clamping performance across its full operating temperature range.
Is SMBJ8.0A-E3/52 suitable for automotive applications?
SMBJ8.0A-E3/52 is RoHS-compliant and rated for operation from –55 °C to +150 °C, but it is not AEC-Q101 qualified in the E3/52 configuration. For automotive use, Vishay offers the SMBJ8.0AHE3_B/H variant (HE3 suffix), which carries full AEC-Q101 qualification. Engineers must specify the HE3 version explicitly when designing for automotive ECUs, infotainment systems, or ADAS modules requiring certified reliability.
How does the SMBJ8.0A-E3/52 differ from the SMBJ8.0CA-E3/52?
The SMBJ8.0A-E3/52 is unidirectional, with a cathode band marking and clamping action only in reverse bias, while the SMBJ8.0CA-E3/52 is bidirectional and clamps symmetrically in both polarities. Both share identical VWM (8.0 V), VBR (8.89–9.83 V), and VC (13.6 V) values, but the CA version exhibits double the reverse leakage (≤2.0 µA) due to dual-junction construction. SMBJ8.0A-E3/52 is preferred for DC rails; SMBJ8.0CA-E3/52 suits AC or floating signal paths.
What is the thermal resistance of SMBJ8.0A-E3/52, and how does it affect layout?
The SMBJ8.0A-E3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on the recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes no internal layer copper or thermal vias. To maintain reliability under repeated surges, PCB layout must replicate this pad area - undersized pads increase junction temperature, accelerating degradation and reducing surge lifetime. The SMBJ8.0A-E3/52 datasheet specifies exact dimensions in Figure 5.
Does SMBJ8.0A-E3/52 require a heatsink for standard operation?
No, SMBJ8.0A-E3/52 does not require an external heatsink for single-event transient suppression, as its 600 W rating applies to non-repetitive pulses with 0.01% duty cycle. However, for repetitive surge conditions (e.g., frequent motor commutation), thermal design must ensure average power dissipation stays below 5.0 W (PD). In such cases, increasing copper area or adding thermal vias beneath the SMB pads improves heat spreading - the SMBJ8.0A-E3/52 relies on PCB copper, not discrete heatsinks, for thermal management.
SMBJ8.0A-E3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 8V
- Voltage - Breakdown (Min):
- 8.89V
- Voltage - Clamping (Max) @ Ipp:
- 13.6V
- Current - Peak Pulse (10/1000µs):
- 44.1A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ8.0A-E3/52 FAQ
1.How can I place an order for SMBJ8.0A-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ8.0A-E3/52 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 SMBJ8.0A-E3/52 reliable?
The price and inventory of SMBJ8.0A-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ8.0A-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ8.0A-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ8.0A-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ8.0A-E3/52?
SMBJ8.0A-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ8.0A-E3/52 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 SMBJ8.0A-E3/52?
For technical support, including SMBJ8.0A-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ8.0A-E3/52 requirements.
6.How does Aetrix verify that SMBJ8.0A-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ8.0A-E3/52 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 SMBJ8.0A-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ8.0A-E3/52?
All SMBJ8.0A-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ8.0A-E3/52, 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 SMBJ8.0A-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ8.0A-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ8.0A-E3/52 Tags
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