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Vishay General Semiconductor - Diodes Division SMBJ8.0-E3/5B
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- Part No.:
- SMBJ8.0-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ8.0-E3/5B.pdf
- Description:
- TVS DIODE 8VWM 15VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,252
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Product details
Overview
SMBJ8.0-E3/5B from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 8.0 V stand-off voltage (VWM), 8.89–9.83 V breakdown voltage (VBR) at 1 mA, 13.6 V maximum clamping voltage (VC) at 44.1 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial and telecom equipment.
For engineers reviewing the SMBJ8.0-E3/5B datasheet, SMBJ8.0-E3/5B pinout, SMBJ8.0-E3/5B application, or SMBJ8.0-E3/5B equivalent, key selection criteria include unidirectional polarity, 13.6 V clamping performance under 44.1 A surge, RoHS-compliant matte tin-plated leads, MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a fast-acting shunt protector: during overvoltage events exceeding VWM = 8.0 V, it avalanches at VBR = 8.89–9.83 V and clamps the line to ≤13.6 V at IPPM = 44.1 A. Its glass-passivated junction ensures stable leakage (<50 µA at VWM) and low incremental surge resistance.
Thermally, it sustains 150 °C max junction temperature with RθJA = 100 °C/W (on recommended pad layout) and handles 100 A non-repetitive forward surge (8.3 ms half-sine). Polarity is marked by cathode band; no marking on bidirectional variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR @ IT = 1 mA | 8.89–9.83 V - Breakdown threshold range ensuring reliable avalanche initiation |
| VC @ IPPM = 44.1 A | 13.6 V - Clamped voltage limiting stress on downstream ICs during 10/1000 µs surge |
| PPPM | 600 W - Peak transient power handling capability per standard 10/1000 µs waveform |
| IPPM | 44.1 A - Maximum non-repetitive surge current the device safely diverts |
| Leakage ID @ VWM | ≤50 µA - Low standby current preserving signal integrity and system efficiency |
| Package | SMB (DO-214AA) - Surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height |
Pinout & Package
Package: SMB (DO-214AA), molded case with matte tin-plated leads, compliant with J-STD-002 solderability and JESD 22-B102 whisker testing. Cathode indicated by band; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to protected circuit ground or low-side reference | Provides return path during clamping; must be routed with low-inductance trace to minimize overshoot |
| Cathode | Current exit terminal in forward bias; connected to protected line (e.g., VCC, signal) | Band-marked terminal; defines unidirectional polarity - reverse connection disables protection |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 4 surges without derating on standard PCB pads |
| 13.6 V clamping voltage at 44.1 A | Keeps downstream 5 V logic or 3.3 V MCU I/O within safe absolute maximum ratings during transients |
| MSL Level 1 (260 °C peak reflow) | Supports single-pass lead-free reflow assembly without preconditioning or dry-pack requirements |
| Glass-passivated junction | Ensures stable VBR tolerance (±5%), low leakage, and long-term reliability under thermal cycling |
| RoHS-compliant, matte tin plating | Guarantees solder joint integrity and intermetallic formation control for high-yield SMT production |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate drivers and microcontroller I/O against inductive kickback from relay coils and solenoid loads. IC Role / Device Role: Unidirectional shunt clamp placed between VDD rail and ground near power stage. Use Value: Limits transient voltage to ≤13.6 V, preventing latch-up or oxide breakdown in 5 V logic and 3.3 V MCU peripherals. |
Use Scenario: Safeguarding LIN bus transceivers and sensor supply lines from load dump and jump-start surges. IC Role / Device Role: Standoff-rated TVS on 12 V supply input to BCUs, positioned upstream of LDO regulators. Use Value: Withstands 600 W pulses while maintaining <50 µA leakage, avoiding regulator dropout or false wake-up events. |
| Telecom Power Supplies | Consumer Sensor Interfaces |
|
Use Scenario: Input-stage surge suppression on AC/DC adapter outputs feeding PoE-powered devices. IC Role / Device Role: Primary clamping element on +5 V or +12 V DC output rails prior to DC-DC converters. Use Value: 13.6 V clamping ensures secondary-side converters remain within input UVLO and overvoltage thresholds. |
Use Scenario: ESD and cable discharge protection on analog sensor lines (e.g., temperature, humidity) in smart home hubs. IC Role / Device Role: Low-capacitance unidirectional TVS on signal paths between sensors and ADC inputs. Use Value: Sub-50 µA leakage avoids DC offset errors; fast response preserves signal fidelity up to 1 MHz bandwidth. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.0A-M3/5B | Halogen-free, RoHS-compliant variant with identical electrical specs and SMB package | No difference in circuit function or layout; selected where halogen-free compliance is mandated | Choose when environmental compliance requires halogen-free materials without altering design or test plans |
| SMBJ8.0CA-E3/5B | Bidirectional version with same VWM = 8.0 V but symmetrical clamping in both polarities | Required for AC-coupled or floating signal lines (e.g., RS-485, CAN) where polarity reversal occurs | Select only if bidirectional protection is needed; unidirectional SMBJ8.0-E3/5B is optimal for DC rails and grounded signals |
Compared with SMBJ8.0A-M3/5B, SMBJ8.0-E3/5B offers standard RoHS compliance without halogen restrictions; versus SMBJ8.0CA-E3/5B, it provides lower capacitance and tighter leakage for DC-biased applications but lacks reverse-polarity clamping capability.
Availability
SMBJ8.0-E3/5B is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power supplies requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMBJ8.0-E3/5B 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, power efficiency, and automotive-grade qualification.
The SMBJ series is engineered for high-energy transient suppression in harsh environments, targeting industrial automation, automotive electronics, and infrastructure equipment where robustness and repeatable clamping performance are critical.
FAQ
What is the maximum clamping voltage of SMBJ8.0-E3/5B under surge conditions?
The SMBJ8.0-E3/5B has a maximum clamping voltage (VC) of 13.6 V when subjected to its rated peak pulse current of 44.1 A using the 10/1000 µs waveform. This value is measured per JEDEC standards and ensures downstream components like 5 V MCUs or logic ICs remain within safe operating limits during transient events. The SMBJ8.0-E3/5B maintains this clamping performance across its specified temperature range and lifetime.
Is SMBJ8.0-E3/5B suitable for automotive applications?
SMBJ8.0-E3/5B is commercial-grade and RoHS-compliant but not AEC-Q101 qualified. For automotive use, Vishay offers the SMBJ8.0HE3 variant (with HE3 suffix), which meets AEC-Q101 stress testing requirements. The SMBJ8.0-E3/5B may be used in non-safety-critical aftermarket or infotainment subsystems where qualification is not mandated, but the SMBJ8.0-E3/5B itself does not carry automotive qualification.
What is the meaning of the "-E3/5B" suffix in SMBJ8.0-E3/5B?
The "-E3" suffix denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads; "/5B" specifies packaging in 13-inch diameter plastic tape and reel, with a base quantity of 3200 units. This format supports high-volume SMT assembly and is distinct from "/52" (7-inch reel, 750 units) or "HE3" (AEC-Q101 qualified) variants. The SMBJ8.0-E3/5B is fully compatible with standard pick-and-place equipment calibrated for DO-214AA footprints.
How does SMBJ8.0-E3/5B compare to SMAJ8.0A in terms of power handling?
SMBJ8.0-E3/5B delivers 600 W peak pulse power (10/1000 µs), whereas SMAJ8.0A is rated for 400 W. The larger SMB package enables higher thermal dissipation and surge current capacity (44.1 A vs. 29.4 A), making SMBJ8.0-E3/5B preferable for applications exposed to higher-energy transients such as industrial motor controls or telecom line cards. Both share identical VWM and VC, but the SMBJ8.0-E3/5B offers superior ruggedness without layout change beyond pad size.
Does SMBJ8.0-E3/5B require derating at elevated ambient temperatures?
Yes - SMBJ8.0-E3/5B must be derated above 25 °C ambient per Figure 2 in Vishay document 88392. At 85 °C, its peak pulse power drops to approximately 420 W (70 % of 600 W), and at 125 °C, it falls to ~240 W (40 %). Derating ensures junction temperature remains ≤150 °C. Designers must verify clamping performance under worst-case thermal conditions; the SMBJ8.0-E3/5B data sheet provides precise derating curves for accurate system-level margining.
SMBJ8.0-E3/5B 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ8.0-E3/5B FAQ
1.How can I place an order for SMBJ8.0-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ8.0-E3/5B 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 SMBJ8.0-E3/5B reliable?
The price and inventory of SMBJ8.0-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ8.0-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ8.0-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ8.0-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ8.0-E3/5B?
SMBJ8.0-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ8.0-E3/5B 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 SMBJ8.0-E3/5B?
For technical support, including SMBJ8.0-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ8.0-E3/5B requirements.
6.How does Aetrix verify that SMBJ8.0-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ8.0-E3/5B 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 SMBJ8.0-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ8.0-E3/5B?
All SMBJ8.0-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ8.0-E3/5B, 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 SMBJ8.0-E3/5B part is unused and in its original packaging.
Return procedure for SMBJ8.0-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ8.0-E3/5B Tags
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