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Vishay General Semiconductor - Diodes Division SMBJ11AHE3/52
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- Part No.:
- SMBJ11AHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ11AHE3/52.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,347
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Product details
Overview
SMBJ11AHE3/52 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping inductive switching transients and lightning-induced surges on power and signal lines. It features 11 V standoff voltage (VWM), 12.2–13.5 V breakdown range (VBR at 1 mA), 18.2 V maximum clamping voltage (VC) at 33 A peak pulse current, and 600 W peak pulse power (10/1000 µs waveform). It is widely deployed for protecting MOSFET gates, microcontroller I/O pins, and sensor interfaces in industrial motor drives.
For engineers reviewing the SMBJ11AHE3/52 datasheet, SMBJ11AHE3/52 pinout, SMBJ11AHE3/52 application, or SMBJ11AHE3/52 equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), junction temperature limit (TJ = 150 °C), and compliance with UL 497B surge protector classification.
Technical Context
This TVS diode operates as a voltage-clamping protection device in series with sensitive downstream circuitry. Its glass-passivated silicon junction enables sub-nanosecond response to transient overvoltages, while its low incremental surge resistance ensures minimal voltage overshoot during high-current events. The device is rated for repetitive 600 W pulses at 0.01% duty cycle and supports 100 A non-repetitive forward surge current (8.3 ms half-sine).
Thermal performance is defined by RθJA = 100 °C/W (on 0.2" × 0.2" copper pads) and RθJL = 20 °C/W, enabling reliable operation up to TJ = 150 °C. The cathode band marking identifies polarity, and the matte tin-plated leads meet J-STD-002 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - Maximum continuous reverse operating voltage before conduction begins; defines safe operating margin below clamping threshold. |
| VBR (min/max) | 12.2 V / 13.5 V at 1 mA - Breakdown voltage range where device transitions from high-impedance to low-impedance clamping state. |
| VC @ IPPM | 18.2 V at 33 A - Clamped voltage during 10/1000 µs surge; determines maximum stress imposed on protected IC or MOSFET. |
| PPPM | 600 W - Peak pulse power handling capability; defines energy absorption capacity per transient event. |
| IFSM | 100 A - Non-repetitive forward surge current rating (8.3 ms half-sine); critical for inductive load switch-off protection. |
| TJ max. | 150 °C - Maximum junction temperature; sets thermal derating boundary for sustained power dissipation. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard 5 mm × 5 mm copper pads; used to calculate temperature rise under DC bias. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads. Cathode identified by black band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to ground or low-side return path in unidirectional TVS configuration; carries full surge current during clamping. |
| Cathode | Current exit terminal during forward conduction; marked with band | Connected to protected line (e.g., 12 V rail or sensor output); defines polarity-sensitive placement on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JEDEC standards. |
| 600 W peak pulse power (10/1000 µs) | Enables robust protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 4 surges without external heatsinking. |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes overvoltage stress on downstream components-critical for 3.3 V or 5 V logic-level interfaces. |
| MSL Level 1 (260 °C reflow) | Supports lead-free SMT assembly without moisture sensitivity concerns or baking requirements. |
| Glass passivated junction | Ensures stable leakage current (<5 µA at VWM) and long-term parameter stability under humidity and thermal stress. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate drivers and current-sense amplifiers against back-EMF spikes during MOSFET turn-off in BLDC inverters. IC Role / Device Role / Timing Role: Unidirectional clamping element placed between gate driver output and MOSFET gate, absorbing <100 ns transients. Use Value: Prevents gate oxide rupture and false triggering by limiting VGS excursion to ≤18.2 V during 33 A surge events. |
Use Scenario: Surge suppression on LIN bus lines and door module sensor inputs exposed to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Standoff-clamp TVS connected between LIN signal line and chassis ground, responding within <1 ns to transients. Use Value: Maintains signal integrity under ISO 16750-2 load dump (up to 35 V, 100 ms) and meets AEC-Q101 automotive qualification. |
| Industrial PLC I/O Modules | Consumer Appliance Control Boards |
|
Use Scenario: Input protection for 24 V digital input channels receiving signals from proximity sensors and limit switches. IC Role / Device Role / Timing Role: Primary overvoltage clamp on field-side input traces, placed upstream of optocoupler or Schmitt trigger input stage. Use Value: Limits transient voltage to 18.2 V, ensuring compatibility with 24 V-rated interface ICs and preventing latch-up in microcontrollers. |
Use Scenario: Protection of MCU GPIOs and display backlight drivers in washing machine control boards subject to relay contact bounce and pump motor noise. IC Role / Device Role / Timing Role: Localized TVS on 5 V supply rail and I²C bus lines, mounted adjacent to connector entry points. Use Value: Suppresses 600 W transients induced by brushed motor commutation without affecting 5 V rail regulation or I²C timing margins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ11AHM3/52 | Halogen-free variant with identical electrical specs and AEC-Q101 qualification; same SMB package and pinout. | No functional difference; selected when halogen-free compliance is required per IPC-1752 or OEM environmental mandates. | Direct material substitution where RoHS + halogen-free certification is mandatory; no layout or validation changes needed. |
| SMCJ11AHE3/52 | Same VWM, VBR, and VC, but in larger SMC (DO-214AB) package with 1500 W PPPM rating and lower RθJA (50 °C/W). | Higher power handling and better thermal performance; suited for higher-energy surge environments (e.g., outdoor equipment). | Choose when system-level surge testing exceeds 600 W or board layout allows larger footprint; requires PCB pad revision. |
Compared with SMBJ11AHM3/52, SMBJ11AHE3/52 offers identical protection performance with standard RoHS compliance but excludes halogen-free certification; compared with SMCJ11AHE3/52, it provides compact size and cost efficiency at the expense of lower surge energy capacity and higher thermal resistance.
Availability
SMBJ11AHE3/52 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body electronics, and consumer appliance control boards requiring stable component supply, AEC-Q101 qualification, and surface-mount surge protection with 600 W capability.
Supply support for SMBJ11AHE3/52 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, TVS devices, and power MOSFETs with emphasis on reliability, precision, and application-specific optimization.
The SMBJ series was developed to deliver standardized, high-reliability transient suppression in compact surface-mount packages for automotive, industrial, and computing applications demanding AEC-Q101 qualification and UL 497B recognition.
FAQ
What is the clamping voltage of SMBJ11AHE3/52 at its rated peak pulse current?
The SMBJ11AHE3/52 has a maximum clamping voltage (VC) of 18.2 V when subjected to its rated peak pulse current of 33 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ11AHE3/52 maintains this clamping performance across its specified operating temperature range and is validated per AEC-Q101 stress tests.
Is SMBJ11AHE3/52 suitable for bidirectional transient protection?
No, SMBJ11AHE3/52 is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. For bidirectional protection, Vishay specifies the "CA" suffix (e.g., SMBJ11CA). Using SMBJ11AHE3/52 in a bidirectional configuration would result in forward conduction during negative transients, potentially damaging the device or failing to protect the circuit. The SMBJ11AHE3/52 must be oriented with cathode toward the protected line and anode to ground.
Does SMBJ11AHE3/52 require derating at elevated ambient temperatures?
Yes, SMBJ11AHE3/52 must be derated above TA = 25 °C per Figure 2 in the datasheet. Its peak pulse power (PPPM) decreases linearly with rising junction temperature, reaching ~50% of 600 W at TJ ≈ 100 °C. Derating is calculated using RθJA = 100 °C/W and the actual copper pad area; for designs operating near 150 °C junction limit, thermal simulation or empirical testing is recommended to confirm margin.
What does the "HE3" suffix indicate in SMBJ11AHE3/52?
"HE3" denotes a RoHS-compliant, AEC-Q101 qualified version of the SMBJ11A device. The "H" indicates AEC-Q101 qualification, "E3" confirms RoHS compliance (lead-free, bromine-free), and "/52" specifies packaging in 7" tape-and-reel with 750 units per reel. This suffix distinguishes it from commercial-grade variants like SMBJ11A-E3/52 (RoHS only) or SMBJ11AHM3/52 (halogen-free + AEC-Q101).
Can SMBJ11AHE3/52 be used in place of SMAJ11A in an existing design?
No-SMBJ11AHE3/52 uses the SMB (DO-214AA) package, while SMAJ11A uses the smaller SMA (DO-214AC) package. Though both share identical electrical ratings, the SMB package has larger terminals, higher surge current capability, and different pad layout requirements. Substituting SMBJ11AHE3/52 for SMAJ11A requires PCB land pattern revision and may affect board space and thermal profile. The SMBJ11AHE3/52 is not a drop-in replacement for SMAJ11A.
SMBJ11AHE3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 11V
- Voltage - Breakdown (Min):
- 12.2V
- Voltage - Clamping (Max) @ Ipp:
- 18.2V
- Current - Peak Pulse (10/1000µs):
- 33A
- 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)
SMBJ11AHE3/52 FAQ
1.How can I place an order for SMBJ11AHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ11AHE3/52 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 SMBJ11AHE3/52 reliable?
The price and inventory of SMBJ11AHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ11AHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ11AHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ11AHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ11AHE3/52?
SMBJ11AHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ11AHE3/52 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 SMBJ11AHE3/52?
For technical support, including SMBJ11AHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ11AHE3/52 requirements.
6.How does Aetrix verify that SMBJ11AHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ11AHE3/52 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 SMBJ11AHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ11AHE3/52?
All SMBJ11AHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ11AHE3/52, 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 SMBJ11AHE3/52 part is unused and in its original packaging.
Return procedure for SMBJ11AHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ11AHE3/52 Tags
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