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Vishay General Semiconductor - Diodes Division SMBJ8.0CHE3/5B
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- Part No.:
- SMBJ8.0CHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ8.0CHE3/5B.pdf
- Description:
- TVS DIODE 8VWM 15VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,241
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Product details
Overview
SMBJ8.0CHE3/5B from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed for robust 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, and clamps transients to ≤13.6 V at 44.1 A peak pulse current (IPPM) under 10/1000 µs waveform - ideal for safeguarding MOSFET gates and microcontroller I/O in industrial motor drives.
For engineers reviewing the SMBJ8.0CHE3/5B datasheet, SMBJ8.0CHE3/5B pinout, SMBJ8.0CHE3/5B application, or SMBJ8.0CHE3/5B equivalent, key selection criteria include its AEC-Q101 qualification, 600 W peak pulse power rating, low clamping ratio (VC/VBR ≈ 1.47), and compatibility with automated SMT assembly on standard PCB pad layouts.
Technical Context
This TVS diode operates as a unidirectional clamping device, leveraging an avalanche breakdown mechanism to divert surge energy away from protected circuitry. Its glass-passivated junction ensures stable VBR tolerance and long-term reliability under repetitive transient stress.
The SMBJ8.0CHE3/5B is rated for 150 °C maximum junction temperature and exhibits a thermal resistance of 100 °C/W (junction-to-ambient) on standard 0.2" × 0.2" copper pads. Its 0.069 %/°C VBR temperature coefficient enables predictable performance across automotive and industrial ambient ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 8.0 V - Maximum continuous reverse voltage before leakage exceeds 1.0 µA; sets operating margin below breakdown. |
| VBR (Breakdown Voltage) | 8.89–9.83 V at 10 mA - Confirmed avalanche onset range; defines minimum clamping threshold under surge conditions. |
| VC (Clamping Voltage) | ≤13.6 V at IPPM = 44.1 A - Peak voltage seen by protected IC during 10/1000 µs surge; determines safe voltage headroom. |
| PPPM (Peak Pulse Power) | 600 W - Maximum single-pulse energy dissipation capability; supports IEC 61000-4-5 Level 4 compliance when properly mounted. |
| IR (Reverse Leakage) | ≤1.0 µA at VWM - Ensures minimal standby power loss and signal integrity in high-impedance circuits. |
| TJ max. | 150 °C - Enables operation in under-hood automotive and high-temperature industrial environments without derating. |
| AEC-Q101 Qualified | Yes - Validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD HBM ≥ 8 kV. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102. Cathode indicated by band marking; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or return path; completes clamping loop during positive transients on cathode side. |
| Cathode | High-side connection point | Connected to protected line (e.g., 12 V rail or sensor output); conducts avalanche current during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, high-temp operating life, and ESD robustness. |
| 600 W peak pulse power (10/1000 µs) | Supports protection against severe transients such as load dump (ISO 7637-2 Pulse 5a) and inductive switching spikes. |
| Low clamping voltage (VC/VBR ≈ 1.47) | Minimizes voltage overshoot on protected nodes, reducing risk of gate oxide damage in downstream MOSFETs or logic inputs. |
| MSL Level 1 (JEDEC J-STD-020) | Enables lead-free reflow soldering at peak temperatures up to 260 °C without moisture-induced failure. |
| Glass passivated junction | Ensures stable electrical parameters over time and improved resistance to humidity and contamination in harsh environments. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V supply lines in body control modules against ISO 7637-2 load dump pulses. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery input and DC-DC converter input stage. Use Value: Limits transient voltage to ≤13.6 V, preventing latch-up or permanent damage to buck controller ICs rated for 16 V absolute max. |
Use Scenario: Shielding analog outputs of pressure sensors in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Low-leakage (≤1.0 µA) TVS connected across sensor output and ground to absorb ESD and cable discharge events. Use Value: Maintains signal fidelity with negligible offset error (<0.1 mV) while clamping 8 kV contact ESD per IEC 61000-4-2 to safe levels. |
| MOSFET Gate Protection | Microcontroller I/O Line Protection |
Use Scenario: Safeguarding high-side N-channel MOSFET gates driven by isolated gate drivers in motor inverters. IC Role / Device Role / Timing Role: TVS placed between gate and source to clamp Miller-induced voltage spikes during fast switching transitions. Use Value: Responds in <1 ps to limit gate-source voltage to ≤13.6 V, avoiding dielectric breakdown of thin gate oxides (typ. 20 V rating). |
Use Scenario: Protecting UART and CAN transceiver pins on embedded controllers exposed to field wiring. IC Role / Device Role / Timing Role: Unidirectional TVS on TX/RX lines referenced to local ground, absorbing induced surges from nearby AC cables. Use Value: Clamps 1 kV/50 Ω ring wave transients to <14 V within nanoseconds, preserving logic-level integrity and preventing false triggering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.0AHE3/5B | No AEC-Q101 qualification; commercial-grade only. | Not suitable for automotive production; acceptable for industrial prototypes or non-safety-critical consumer devices. | Select when cost sensitivity outweighs automotive qualification requirements and full lifecycle traceability is not mandated. |
| SMAJ8.0AHE3/5B | Lower PPPM (400 W vs. 600 W); SMA package (DO-214AC), smaller footprint and lower thermal mass. | Less effective against high-energy transients like load dump; limited to lower-power signal-line or secondary-rail protection. | Choose for space-constrained designs where surge energy is limited to <400 W and board area is premium. |
Compared with SMBJ8.0AHE3/5B and SMAJ8.0AHE3/5B, the SMBJ8.0CHE3/5B uniquely combines AEC-Q101 qualification, 600 W surge handling, and SMB package thermal robustness - making it the only option qualified for front-end automotive power rail protection requiring both reliability and energy absorption.
Availability
SMBJ8.0CHE3/5B is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLC I/O modules, and motor drive gate driver circuits requiring stable component supply with full AEC-Q101 traceability and long-term manufacturing continuity.
Supply support for SMBJ8.0CHE3/5B 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 high-reliability diodes, rectifiers, and protection devices for automotive, industrial, and computing markets.
The SMBJ series was engineered specifically for high-energy transient suppression in harsh-environment electronics, emphasizing AEC-Q101 compliance, tight VBR tolerances, and repeatable clamping performance across temperature.
FAQ
What is the clamping voltage of SMBJ8.0CHE3/5B at its rated peak pulse current?
The SMBJ8.0CHE3/5B has a maximum clamping voltage (VC) of 13.6 V when subjected to its rated peak pulse current (IPPM) of 44.1 A under the standard 10/1000 µs waveform. This value is measured at the device terminals and reflects worst-case voltage seen by protected circuitry during surge events - critical for ensuring downstream components remain within their absolute maximum ratings.
Is SMBJ8.0CHE3/5B suitable for bidirectional transient protection?
No, SMBJ8.0CHE3/5B is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. For bidirectional protection, Vishay offers the SMBJ8.0CA variant. Using SMBJ8.0CHE3/5B in bidirectional applications would result in forward conduction during negative transients, potentially damaging the device or failing to protect the circuit.
Does SMBJ8.0CHE3/5B require a heatsink for standard operation?
No external heatsink is required for SMBJ8.0CHE3/5B under typical single-pulse or low-duty-cycle surge conditions. Its RθJA of 100 °C/W assumes mounting on 0.2" × 0.2" copper pads per terminal - sufficient for dissipating 5.0 W continuously at TA = 50 °C. Heatsinking becomes relevant only for repetitive surge scenarios exceeding 0.01% duty cycle.
What does the "HE3/5B" suffix indicate in SMBJ8.0CHE3/5B?
The "HE3" denotes RoHS-compliant construction with AEC-Q101 qualification; "5B" specifies packaging in 13-inch plastic tape-and-reel format with 3200 units per reel. This ordering code ensures traceable, automotive-grade material with full process control documentation and extended temperature validation - distinct from commercial-grade "E3" or halogen-free "HM3" variants.
How does SMBJ8.0CHE3/5B compare to SMAJ8.0CHE3/5B in terms of surge handling?
SMBJ8.0CHE3/5B delivers 600 W peak pulse power versus 400 W for SMAJ8.0CHE3/5B, due to its larger SMB (DO-214AA) package offering lower thermal resistance and higher surge current capacity (44.1 A vs. 29.4 A). This makes SMBJ8.0CHE3/5B appropriate for primary power rail protection, while SMAJ8.0CHE3/5B suits secondary or signal-line applications with lower energy threats.
SMBJ8.0CHE3/5B 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:
- -
- Bidirectional Channels:
- 1
- 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)
SMBJ8.0CHE3/5B FAQ
1.How can I place an order for SMBJ8.0CHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ8.0CHE3/5B 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 SMBJ8.0CHE3/5B reliable?
The price and inventory of SMBJ8.0CHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ8.0CHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ8.0CHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ8.0CHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ8.0CHE3/5B?
SMBJ8.0CHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ8.0CHE3/5B 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 SMBJ8.0CHE3/5B?
For technical support, including SMBJ8.0CHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ8.0CHE3/5B requirements.
6.How does Aetrix verify that SMBJ8.0CHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ8.0CHE3/5B 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 SMBJ8.0CHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ8.0CHE3/5B?
All SMBJ8.0CHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ8.0CHE3/5B, 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 SMBJ8.0CHE3/5B part is unused and in its original packaging.
Return procedure for SMBJ8.0CHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ8.0CHE3/5B Tags
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