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Vishay General Semiconductor - Diodes Division SMBJ11CAHM3/I
- Part No.:
- SMBJ11CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ11CAHM3/I.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,439
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Product details
Overview
SMBJ11CAHM3/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal or power lines. It features a 11 V stand-off voltage (VWM), 12.2–13.5 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), and clamps to ≤18.2 V at 33 A peak surge current. Used for protecting MOSFETs, ICs, and sensor signal lines in industrial and telecom equipment.
For engineers reviewing the SMBJ11CAHM3/I datasheet, SMBJ11CAHM3/I pinout, SMBJ11CAHM3/I application, or SMBJ11CAHM3/I equivalent, this page delivers verified electrical specs, bidirectional clamping behavior, thermal resistance (RθJA = 100 °C/W), AEC-Q101 qualification status, and real-world protection use cases - all confirmed from Vishay's official 88392 document (Rev. 09-Jan-2024).
Technical Context
This device operates as a voltage-clamping protector with symmetrical bidirectional conduction - no polarity marking required. Its silicon avalanche junction provides sub-nanosecond response time and low dynamic impedance during transient events, enabling effective suppression of ESD, lightning-induced surges, and inductive switching spikes.
Rated for -55 °C to +150 °C junction temperature, it delivers 600 W peak pulse power under 10/1000 µs waveform with 0.01% duty cycle, and maintains stable clamping performance across temperature due to ±0.080 %/°C VBR temperature coefficient. The halogen-free, RoHS-compliant HM3 suffix confirms compliance with JESD201 Class 2 whisker resistance and MSL Level 1 reflow profile (260 °C peak).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 11 V - Maximum continuous reverse voltage before significant leakage; defines operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 12.2–13.5 V at 1 mA - Guaranteed avalanche initiation range; ensures reliable turn-on during overvoltage events |
| VC (Clamping Voltage) | ≤18.2 V at IPPM = 33 A - Peak voltage seen by protected circuit during 10/1000 µs surge; determines stress on downstream components |
| PPPM (Peak Pulse Power) | 600 W - Sustained transient energy absorption capability under standardized 10/1000 µs waveform |
| ID (Reverse Leakage) | ≤5.0 µA at VWM - Minimal DC loading on signal/power line during normal operation |
| RθJA | 100 °C/W - Thermal resistance from junction to ambient on standard 0.2" × 0.2" copper pads; informs derating above 25 °C |
| TJ max. | +150 °C - Maximum allowable junction temperature; supports operation in high-ambient industrial environments |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, MSL Level 1 (260 °C peak reflow). Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); matte tin-plated leads solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; common node for bidirectional conduction | Connected to lower-potential side of protected line; forms symmetrical clamp path with cathode |
| Cathode | Current exit terminal in forward bias; common node for bidirectional conduction | Connected to higher-potential side of protected line; enables clamping in both voltage polarities |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 600 W peak pulse power | Handles IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) with margin when mounted per recommended pad layout |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes overvoltage stress on protected ICs compared to higher-ratio suppressors |
| MSL Level 1 rating | Allows unlimited floor life and single-reflow processing without baking, reducing manufacturing complexity |
Applications
| Industrial Motor Drives | Automotive Sensor Interfaces |
|---|---|
Use Scenario: Protection of gate drivers and feedback signal lines against inductive kickback from BLDC motor switching. IC Role / Device Role / Timing Role: Voltage clamping element placed across MOSFET gate-source or op-amp input pins. Use Value: Limits transient overshoot to ≤18.2 V, preventing gate oxide rupture and analog front-end saturation. |
Use Scenario: Shielding LIN/CAN physical layer receivers from load-dump and jump-start induced surges. IC Role / Device Role / Timing Role: Bidirectional shunt protector on differential bus lines or single-ended sensor supply rails. Use Value: Maintains signal integrity during 12 V system transients up to 600 W without polarity reversal concerns. |
| Telecom Power Supplies | Consumer IoT Sensor Nodes |
Use Scenario: Input-stage surge suppression on 48 V DC-DC converter inputs exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary-line TVS connected between input rail and chassis ground. Use Value: Absorbs 10/1000 µs pulses up to 33 A while holding clamped voltage below 18.2 V, preserving upstream rectifiers. |
Use Scenario: ESD hardening of I²C/SPI lines connecting MCU to environmental sensors in battery-powered devices. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF typical) bidirectional clamp on data bus pairs. Use Value: Passes IEC 61000-4-2 ±8 kV contact discharge without latch-up, with <5 µA leakage preserving battery life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ11CA-E3/52 | RoHS-compliant commercial grade; no halogen-free or AEC-Q101 qualification | Limited to non-automotive industrial/commercial use; not suitable for automotive ECUs | Select when cost sensitivity outweighs automotive qualification requirements |
| SMBJ11CAHE3_B/I | AEC-Q101 qualified, RoHS-compliant, but not halogen-free; same SMB package and electrical specs | Meets automotive reliability standards but lacks halogen-free material declaration required by some OEMs | Choose where AEC-Q101 is mandatory but halogen-free content is not enforced |
Compared with SMBJ11CAHM3/I, the E3 variant lacks automotive qualification and halogen-free status, while the HE3 variant meets AEC-Q101 but omits halogen-free compliance - making SMBJ11CAHM3/I the only option satisfying full automotive material and reliability requirements simultaneously.
Availability
SMBJ11CAHM3/I is available at Aetrix Electronics and suitable for industrial motor drives, automotive sensor interfaces, and telecom power supplies requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for SMBJ11CAHM3/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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMBJ series targets board-level transient protection across automotive, industrial, and telecom markets, with design focus on high-power clamping, low leakage, and robust thermal performance in compact surface-mount packages.
FAQ
What is the clamping voltage of SMBJ11CAHM3/I at its rated peak pulse current?
The SMBJ11CAHM3/I clamps to a maximum 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 Vishay Document 88392 and defines the upper voltage limit imposed on protected circuits during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is SMBJ11CAHM3/I suitable for automotive applications?
Yes, SMBJ11CAHM3/I is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction validated for automotive-grade reliability. It meets requirements for temperature cycling, high-temperature reverse bias, and ESD robustness - making it appropriate for engine control units, body electronics, and ADAS sensor modules.
What does the "CA" suffix indicate in SMBJ11CAHM3/I?
The "CA" suffix in SMBJ11CAHM3/I denotes a bidirectional configuration, meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., SMBJ11A), it has no cathode band marking and functions identically in either orientation across the protected line.
What is the thermal resistance of SMBJ11CAHM3/I, and how does it affect layout?
SMBJ11CAHM3/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 assumes minimum recommended pad layout; reducing pad area increases RθJA and requires derating of power dissipation above 25 °C ambient - critical for sustained surge duty cycles.
How does SMBJ11CAHM3/I differ from SMBJ11A in practical circuit design?
SMBJ11CAHM3/I is bidirectional with symmetrical clamping, while SMBJ11A is unidirectional and requires correct polarity placement (cathode band toward higher potential). In AC-coupled or floating signal paths - such as differential sensor outputs or telecom line interfaces - SMBJ11CAHM3/I eliminates orientation dependency and simplifies layout, whereas SMBJ11A would require additional design verification for polarity alignment.
SMBJ11CAHM3/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:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- 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)
SMBJ11CAHM3/I FAQ
1.How can I place an order for SMBJ11CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ11CAHM3/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 SMBJ11CAHM3/I reliable?
The price and inventory of SMBJ11CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ11CAHM3/I is usually 5 days.
3.What payment methods are accepted for SMBJ11CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ11CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ11CAHM3/I?
SMBJ11CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ11CAHM3/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 SMBJ11CAHM3/I?
For technical support, including SMBJ11CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ11CAHM3/I requirements.
6.How does Aetrix verify that SMBJ11CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SMBJ11CAHM3/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 SMBJ11CAHM3/I meets industry standards.
7.What is the process for return or replacement of SMBJ11CAHM3/I?
All SMBJ11CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ11CAHM3/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 SMBJ11CAHM3/I part is unused and in its original packaging.
Return procedure for SMBJ11CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ11CAHM3/I Tags
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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