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Vishay General Semiconductor - Diodes Division SMBJ8.0-E3/52
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- Part No.:
- SMBJ8.0-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ8.0-E3/52.pdf
- Description:
- TVS DIODE 8VWM 15VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,346
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Product details
Overview
SMBJ8.0-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 (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 - deployed in industrial motor drives to safeguard MOSFET gate drivers against inductive switching transients.
For engineers reviewing the SMBJ8.0-E3/52 datasheet, SMBJ8.0-E3/52 pinout, SMBJ8.0-E3/52 application, or SMBJ8.0-E3/52 equivalent, key selection criteria include clamping voltage margin relative to protected IC's absolute maximum rating, thermal resistance (RθJA = 100 °C/W), unidirectional polarity marking (cathode band), RoHS-compliant matte tin plating, and compatibility with automated SMT placement on SMB (DO-214AA) footprint.
Technical Context
This TVS operates as a voltage-clamped shunt protector: under normal bias it presents high impedance (<1 µA leakage at 8.0 V), then rapidly avalanches below 1 ns to divert surge energy when transient voltage exceeds VBR. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance.
Rated for 100 A non-repetitive forward surge (8.3 ms half-sine) and 150 °C max junction temperature, SMBJ8.0-E3/52 meets MSL Level 1 per J-STD-020 and supports reflow up to 260 °C peak. It is not AEC-Q101 qualified (suffix lacks HE3/HM3), distinguishing it from automotive-grade variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - Maximum continuous reverse operating voltage before significant leakage; sets upper limit for protected circuit's nominal rail. |
| VBR @ IT=1 mA | 8.89–9.83 V - Verified breakdown range ensuring reliable turn-on margin above VWM; guarantees clamping initiates before damage threshold. |
| VC @ IPPM=44.1 A | 13.6 V - Clamped voltage during 600 W transient; must remain below downstream IC's absolute maximum input rating. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 µs waveform; defines maximum single-event surge energy absorption capability. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; determines steady-state power derating above 25 °C ambient. |
| IFSM | 100 A - Peak forward surge current rating (8.3 ms half-sine); validates robustness against accidental polarity reversal surges. |
| Package | SMB (DO-214AA) - Standardized 2-pin surface-mount outline with 5.59 mm max length, 4.06 mm max width, and cathode band polarity indicator. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, unidirectional configuration with molded plastic case meeting UL 94 V-0. Cathode identified by a visible band on the body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Low-side reference terminal | Connected to ground or lowest potential node; completes conduction path during reverse-biased clamping event. |
| Cathode (banded end) | High-side surge input terminal | Connected to protected line (e.g., 12 V rail); avalanche conduction occurs from cathode to anode when VIN > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables protection against high-energy transients from relay coil collapse or ESD events without thermal runaway. |
| 13.6 V clamping voltage at 44.1 A | Provides tight voltage limiting for 5 V–12 V logic and power circuits, maintaining safe margin below 15 V absolute maximum ratings. |
| Glass passivated junction | Ensures stable, repeatable breakdown voltage over temperature and lifetime, critical for long-term reliability in industrial environments. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without moisture sensitivity concerns or pre-bake requirements. |
| RoHS-compliant matte tin plating | Guarantees solderability per J-STD-002 and whisker resistance per JESD 201 Class 2 for high-reliability PCB assemblies. |
Applications
| Industrial Motor Drive Control | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: Protection of gate driver ICs (e.g., IR2110) from inductive kickback during MOSFET/IGBT switching in 24 V DC motor controllers. IC Role / Device Role / Timing Role: Shunt clamping device placed between gate driver output and ground, activated within <1 ns upon voltage overshoot. Use Value: Limits gate-source voltage to ≤13.6 V, preventing oxide breakdown in logic-level MOSFETs while sustaining 600 W transient energy. |
Use Scenario: Input line protection for microcontroller-based window lift or seat actuator modules exposed to load dump and jump-start transients. IC Role / Device Role / Timing Role: Primary front-end TVS on 12 V supply rail upstream of LDO regulators and CAN transceivers. Use Value: Clamps 12 V rail to 13.6 V during ISO 7637-2 Pulse 1 (−150 V/50 Ω) and Pulse 3a (−200 V/50 Ω), preserving MCU reset integrity. |
| Telecom Power Interface | Consumer Appliance Sensor Hub |
|
Use Scenario: Surge suppression on PoE-powered Ethernet switch port DC inputs subject to lightning-induced common-mode transients. IC Role / Device Role / Timing Role: Unidirectional clamp on secondary-side 48 V DC bus feeding PHY and management ICs. Use Value: Absorbs 600 W surges without degradation, maintaining VC ≤13.6 V to protect 5 V auxiliary rails derived via buck converters. |
Use Scenario: Overvoltage guard for I²C and analog sensor lines (e.g., temperature, humidity) in smart washing machine control boards. IC Role / Device Role / Timing Role: Point-of-load TVS on 3.3 V or 5 V sensor supply traces adjacent to motor windings and triac noise sources. Use Value: Sub-1 ns response prevents latch-up in precision ADCs and digital sensors during brush-commutator EMI bursts. |
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-E3/52 | Identical electrical specs and package; differs only in ordering suffix - "A" denotes unidirectional variant (same as "-E3/52" base designation). | No functional difference; both rated for same 8.0 V VWM, 13.6 V VC, and 600 W PPPM. | Select SMBJ8.0A-E3/52 if standard Vishay part numbering is required for BOM alignment or distributor stocking programs. |
| SMCJ8.0A-E3/57 | Same VWM/VC but larger SMC (DO-214AB) package; 1500 W PPPM, lower RθJA (50 °C/W), and higher IPPM (88.2 A). | Used where higher surge endurance or improved thermal performance is needed - e.g., outdoor telecom enclosures with frequent lightning exposure. | Choose SMCJ8.0A-E3/57 only if board layout allows larger footprint and system-level surge testing exceeds 600 W requirements. |
Compared with SMBJ8.0-E3/52, SMBJ8.0A-E3/52 offers identical protection performance in the same SMB package, while SMCJ8.0A-E3/57 trades compactness for 2.5× higher surge capacity and better thermal dissipation - making the latter suitable for harsher environments but requiring PCB redesign.
Availability
SMBJ8.0-E3/52 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body electronics, and telecom power interfaces requiring stable component supply, RoHS compliance, and surface-mount manufacturability.
Supply support for SMBJ8.0-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, efficiency, and application-specific optimization.
The SMBJ series was engineered for high-power, low-profile transient suppression in space-constrained industrial and automotive systems - balancing clamping precision, surge robustness, and SMT process compatibility.
FAQ
What is the maximum clamping voltage of SMBJ8.0-E3/52 and under what test condition?
The SMBJ8.0-E3/52 has a maximum clamping voltage (VC) of 13.6 V, measured at a peak pulse current (IPPM) of 44.1 A using the standardized 10/1000 µs double-exponential waveform. This value is guaranteed across the full operating temperature range and represents the upper voltage limit imposed on the protected circuit during worst-case transient events.
Is SMBJ8.0-E3/52 suitable for automotive applications requiring AEC-Q101 qualification?
No, SMBJ8.0-E3/52 is not AEC-Q101 qualified. Its suffix "E3" indicates RoHS-compliant commercial grade only. For automotive use, select the AEC-Q101 qualified variant SMBJ8.0AHE3_B/H or SMBJ8.0AHM3_B/H - these carry the "HE3" or "HM3" suffix and are tested to stress requirements defined in AEC-Q101.
How does the SMBJ8.0-E3/52 differ from bidirectional TVS diodes like SMBJ8.0CA?
The SMBJ8.0-E3/52 is unidirectional and functions only during reverse-bias overvoltage events, with a cathode band marking. In contrast, SMBJ8.0CA is bidirectional and suppresses transients of either polarity - useful for AC lines or differential data buses. SMBJ8.0-E3/52 provides tighter leakage control (<1 µA at 8.0 V) and supports forward surge rating (100 A), unlike bidirectional versions.
What is the thermal resistance and how does it affect SMBJ8.0-E3/52's power handling?
The SMBJ8.0-E3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads. This means each watt of sustained power dissipates a 100 °C temperature rise above ambient - limiting continuous power to ~50 mW at 70 °C ambient. Its 600 W rating applies only to short-duration pulses (≤1 ms), not steady-state operation.
Can SMBJ8.0-E3/52 be used in place of SMAJ8.0A for higher surge protection?
No - SMAJ8.0A is rated for only 400 W peak pulse power and uses the smaller SMA (DO-214AC) package. Replacing it with SMBJ8.0-E3/52 increases surge capacity to 600 W and improves thermal performance due to the larger SMB footprint, but requires verifying PCB pad layout compatibility and ensuring no interference with adjacent components due to its 5.59 mm length.
SMBJ8.0-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:
- 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-E3/52 FAQ
1.How can I place an order for SMBJ8.0-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ8.0-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 SMBJ8.0-E3/52 reliable?
The price and inventory of SMBJ8.0-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 SMBJ8.0-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ8.0-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ8.0-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ8.0-E3/52?
SMBJ8.0-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ8.0-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 SMBJ8.0-E3/52?
For technical support, including SMBJ8.0-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ8.0-E3/52 requirements.
6.How does Aetrix verify that SMBJ8.0-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ8.0-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 SMBJ8.0-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ8.0-E3/52?
All SMBJ8.0-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ8.0-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 SMBJ8.0-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ8.0-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ8.0-E3/52 Tags
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