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Vishay General Semiconductor - Diodes Division SMBJ11AHM3_B/I
- Part No.:
- SMBJ11AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ11AHM3_B/I.pdf
- Description:
- 600W,11V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:4,582
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Product details
Overview
SMBJ11AHM3_B/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. It features a 11 V stand-off voltage (VWM), 12.2–13.5 V breakdown voltage (VBR) at 1 mA, 18.2 V maximum clamping voltage (VC) at 33 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed on power rails and signal lines in industrial sensor interfaces.
For engineers reviewing the SMBJ11AHM3_B/I datasheet, SMBJ11AHM3_B/I pinout, SMBJ11AHM3_B/I application, or SMBJ11AHM3_B/I equivalent, this device serves as a halogen-free, RoHS-compliant, AEC-Q101 qualified TVS for automotive-grade ESD and surge protection where low clamping voltage, fast response time (<1 ns), and stable thermal performance up to +150 °C junction temperature are critical selection criteria.
Technical Context
This unidirectional TVS operates by avalanche breakdown when reverse voltage exceeds its VBR range (12.2–13.5 V), limiting transient energy to protect downstream ICs and MOSFETs. Its low incremental surge resistance ensures minimal voltage overshoot during 33 A surges, while the glass-passivated junction delivers consistent performance across temperature.
The SMBJ11AHM3_B/I is rated for 100 A non-repetitive forward surge current (IFSM), supports 5.0 W steady-state power dissipation at TA = 50 °C, and exhibits a VBR temperature coefficient of +0.080 %/°C - enabling predictable derating in high-temperature environments such as engine control units and motor drives.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working margin for protected circuitry. |
| VBR (min/max) | 12.2 V / 13.5 V at IT = 1 mA - precise avalanche onset range ensuring reliable triggering without premature conduction. |
| VC @ IPPM | 18.2 V at 33 A - clamped voltage during 10/1000 µs surge; determines worst-case stress on downstream components. |
| PPPM | 600 W - peak pulse power handling capability; enables protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω). |
| TJ max. | +150 °C - maximum junction temperature; supports operation in under-hood automotive and industrial ambient conditions. |
| RθJA | 100 °C/W - thermal resistance junction-to-ambient; informs PCB copper pad design (0.2" × 0.2") for thermal reliability. |
| Polarity | Unidirectional - cathode marked with band; blocks forward conduction above ~3.5 V, suppresses only reverse transients. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, MSL Level 1 (260 °C reflow peak). Cathode indicated by molded band on case.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or low-impedance return path; completes clamping loop during transient events. |
| Cathode | High-side connection point | Connected to protected line (e.g., 12 V rail or sensor output); conducts avalanche current to anode during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables compliance with IEC 61000-4-5 surge immunity requirements for industrial and automotive electronics. |
| 18.2 V clamping voltage at 33 A | Keeps protected ICs within absolute maximum ratings during 4 kV surge events on 12 V systems. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including body control modules and ADAS sensor interfaces. |
| Halogen-free & RoHS-compliant | Meets environmental compliance mandates for global OEM supply chains and end-of-life recycling. |
| Low profile SMB package | Supports automated SMT placement and fits space-constrained layouts in compact ECUs and IoT edge nodes. |
Applications
| Automotive Body Control Module (BCM) | Industrial Current-Sense Amplifier Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and microcontroller I/O pins from load dump and inductive switching transients in vehicle door modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between LIN line and ground to clamp negative-going spikes while blocking normal 12 V supply ripple. Use Value: Prevents latch-up or permanent damage to LIN PHY ICs during 12 V system load dump events (ISO 7637-2 Pulse 5a). |
Use Scenario: Safeguarding precision shunt-based current-sense amplifiers connected to motor driver outputs in servo drives. IC Role / Device Role / Timing Role: TVS placed across amplifier input terminals to absorb flyback energy from MOSFET switching edges. Use Value: Maintains measurement accuracy by preventing input stage saturation or ESD-induced offset drift during repetitive 30 A switching events. |
| Telecom Power Supply Input Stage | Consumer Appliance Motor Driver Interface |
Use Scenario: Shielding AC-DC converter primary-side controllers from lightning-induced surges entering via mains input. IC Role / Device Role / Timing Role: TVS installed across bulk capacitor terminals to limit transient voltage rise during 1.2/50 µs open-circuit surges. Use Value: Extends controller lifetime by reducing cumulative dielectric stress on gate oxide layers during repeated 2 kV surge exposure. |
Use Scenario: Protecting Hall-effect position sensors and gate drivers in washing machine motor control boards from commutation noise. IC Role / Device Role / Timing Role: TVS mounted directly at sensor connector to suppress <100 ns EFT bursts coupled through harness wiring. Use Value: Eliminates false zero-crossing detection and prevents firmware resets caused by transient-induced logic glitches. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ11AHE3_B/I | Same electrical specs; RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification. | Suitable for commercial/industrial use only; not approved for automotive under-hood deployment. | Select when halogen-free content is not mandated and automotive qualification is unnecessary. |
| SMBJ11CAHM3_B/I | Bidirectional variant; symmetric VBR (12.2–13.5 V) in both polarities; same clamping and power ratings. | Required for AC-coupled or bidirectional signal lines (e.g., RS-485, CAN FD) where polarity reversal occurs. | Choose only when protecting differential or alternating-voltage paths - not a drop-in replacement for unidirectional use cases. |
Compared with SMBJ11AHM3_B/I, the HE3 variant trades halogen-free construction and automotive qualification for lower cost in non-automotive settings, while the CAHM3 variant adds bidirectional clamping capability at the expense of polarity-specific optimization for DC rail protection.
Availability
SMBJ11AHM3_B/I is available at Aetrix Electronics and suitable for automotive electronics, industrial motor controls, and telecom power supply designs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBJ11AHM3_B/I 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 validation.
The SMBJ series targets high-energy transient suppression in harsh environments, with HM3 variants engineered specifically for automotive-grade durability, halogen-free compliance, and AEC-Q101 stress testing across temperature and surge cycles.
FAQ
What is the clamping voltage of SMBJ11AHM3_B/I at its rated peak pulse current?
The SMBJ11AHM3_B/I has a maximum clamping voltage (VC) of 18.2 V at 33 A peak pulse current with a 10/1000 µs waveform. This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ11AHM3_B/I maintains this clamping performance across its specified operating temperature range, making it suitable for applications where downstream ICs have tight absolute maximum voltage tolerances.
Is SMBJ11AHM3_B/I suitable for automotive applications?
Yes, SMBJ11AHM3_B/I is AEC-Q101 qualified and manufactured with halogen-free, RoHS-compliant materials - meeting key requirements for automotive electronics. Its +150 °C maximum junction temperature, validated surge robustness, and MSL Level 1 reflow compatibility support use in body control modules, sensor interfaces, and infotainment power supplies. The HM3 suffix explicitly denotes this automotive-grade qualification, distinguishing it from commercial-grade variants like SMBJ11A-E3.
How does SMBJ11AHM3_B/I differ from SMBJ11AHE3_B/I?
SMBJ11AHM3_B/I and SMBJ11AHE3_B/I share identical electrical specifications (VWM = 11 V, VC = 18.2 V, PPPM = 600 W), but differ in material compliance and qualification: HM3 is halogen-free and AEC-Q101 qualified, while HE3 is RoHS-compliant but contains halogens and lacks automotive qualification. This makes SMBJ11AHM3_B/I appropriate for under-hood automotive use, whereas SMBJ11AHE3_B/I is limited to commercial/industrial applications where halogen content and automotive certification are not required.
What is the thermal resistance of SMBJ11AHM3_B/I, and how does it affect PCB layout?
The SMBJ11AHM3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value guides PCB thermal design: larger copper areas reduce RθJA and improve surge endurance, especially during repetitive transients. For sustained power dissipation near 5.0 W, designers should verify board-level thermal performance using the device's RθJL (20 °C/W) and recommended pad layout to avoid exceeding +150 °C junction temperature.
Can SMBJ11AHM3_B/I be used in bidirectional signal protection?
No - SMBJ11AHM3_B/I is a unidirectional TVS diode, intended for DC rail or single-polarity signal line protection. Its cathode band marks the high-side terminal, and it conducts only during reverse overvoltage events. For bidirectional protection (e.g., RS-485, CAN, or AC-coupled analog lines), the bidirectional variant SMBJ11CAHM3_B/I must be used instead. Substituting SMBJ11AHM3_B/I in such applications risks failure to clamp positive transients and potential damage to protected circuitry.
SMBJ11AHM3_B/I 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):
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ11AHM3_B/I FAQ
1.How can I place an order for SMBJ11AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ11AHM3_B/I 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 SMBJ11AHM3_B/I reliable?
The price and inventory of SMBJ11AHM3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ11AHM3_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ11AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ11AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ11AHM3_B/I?
SMBJ11AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ11AHM3_B/I 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 SMBJ11AHM3_B/I?
For technical support, including SMBJ11AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ11AHM3_B/I requirements.
6.How does Aetrix verify that SMBJ11AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ11AHM3_B/I 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 SMBJ11AHM3_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ11AHM3_B/I?
All SMBJ11AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ11AHM3_B/I, 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 SMBJ11AHM3_B/I part is unused and in its original packaging.
Return procedure for SMBJ11AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ11AHM3_B/I Tags
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