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Vishay General Semiconductor - Diodes Division SMBJ11CAHM3_A/H
- Part No.:
- SMBJ11CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ11CAHM3_A/H.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,180
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Product details
Overview
SMBJ11CAHM3_A/H 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 standoff voltage (VWM), 12.2–13.5 V breakdown range (VBR at 1 mA), 18.2 V maximum clamping voltage (VC) at 33.0 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 µs waveform). It is used to protect MOSFETs, ICs, and sensor signal lines in industrial and telecom equipment against ESD and inductive switching surges.
For engineers reviewing the SMBJ11CAHM3_A/H datasheet, SMBJ11CAHM3_A/H pinout, SMBJ11CAHM3_A/H application, or SMBJ11CAHM3_A/H equivalent, key selection considerations include bidirectional clamping capability, 18.2 V clamping threshold at rated surge current, AEC-Q101 qualification status, halogen-free RoHS compliance (HM3 suffix), and SMB package thermal performance with RθJA = 100 °C/W.
Technical Context
This device operates as a voltage-clamping protector with symmetrical avalanche behavior in both directions due to its bidirectional construction. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while the 10/1000 µs surge rating reflects standardized lightning and switching transient immunity testing per ANSI/IEEE C62.35.
The SMBJ11CAHM3_A/H is rated for continuous operation from –55 °C to +150 °C junction temperature, with thermal resistance of 20 °C/W junction-to-lead (RθJL). Its MSL Level 1 rating (J-STD-020) and matte tin-plated leads support lead-free reflow compatibility up to 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 11 V - Maximum continuous reverse voltage before significant conduction begins; defines operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 12.2–13.5 V at 1 mA - Confirmed avalanche onset range; ensures reliable triggering during transients without premature conduction. |
| VC (Clamping Voltage) | 18.2 V at 33.0 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge; determines downstream component stress. |
| PPPM (Peak Pulse Power) | 600 W - Sustained energy-handling capacity under standardized surge waveform; enables protection against IEC 61000-4-5 Level 3/4 events. |
| IPPM (Peak Pulse Current) | 33.0 A - Maximum non-repetitive surge current the device can shunt without failure; directly linked to PCB trace and layout robustness. |
| TJmax | +150 °C - Maximum allowable junction temperature; supports operation in high-ambient industrial environments with proper thermal pad design. |
| Package | SMB (DO-214AA) - Standardized 2-pin surface-mount outline with 5.0 mm × 5.0 mm copper pad requirement; optimized for automated placement and thermal dissipation. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102. Mounting requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal for rated power derating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (bidirectional) | Accepts surge current from either direction; connects to line being protected (e.g., RS-485 A/B, DC bus, sensor output). |
| Cathode | Transient current exit point (bidirectional) | Completes low-impedance path to ground or return rail during clamping; must be routed with minimal inductance for effective suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables symmetric protection on AC-coupled or differential lines (e.g., CAN, RS-485) without polarity concerns or external circuitry. |
| 600 W peak pulse power (10/1000 µs) | Meets IEC 61000-4-5 surge immunity requirements for industrial equipment up to Level 4 (4 kV line-earth, 2 kV line-line). |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance-supports under-hood and ADAS sensor applications. |
| Halogen-free & RoHS-compliant | Fulfills environmental compliance mandates for consumer, telecom, and industrial end-equipment without compromising surge robustness. |
| MSL Level 1 (260 °C peak) | Eliminates moisture sensitivity concerns during standard lead-free reflow, reducing BOM risk and assembly yield loss. |
Applications
| Industrial Motor Drive Control | Automotive Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting gate drivers and feedback signal lines in variable-frequency drives from inductive kickback during IGBT switching. IC Role / Device Role / Timing Role: Bidirectional TVS clamping element placed across isolated signal inputs (e.g., encoder A/B lines) and low-side current sense paths. Use Value: Limits transient voltage to ≤18.2 V during 33 A surges, preventing latch-up or damage to isolated amplifiers and microcontrollers operating at 3.3 V or 5 V rails. |
Use Scenario: Safeguarding LIN/CAN transceiver I/O pins and analog sensor outputs (e.g., pressure, temperature) in engine control modules. IC Role / Device Role / Timing Role: Primary front-end surge suppressor on vehicle bus lines and sensor harness interfaces, compliant with ISO 16750-2 pulse 5a/b. Use Value: Withstands repetitive 10/1000 µs surges up to 600 W while maintaining <1.0 µA leakage at 11 V, ensuring signal integrity and low quiescent current in always-on systems. |
| Telecom Power Supply Input | Consumer USB-C Port ESD Protection |
|
Use Scenario: Secondary-side overvoltage suppression on 12 V or 24 V DC input rails feeding PoE-powered switches and base station RF modules. IC Role / Device Role / Timing Role: Fast-response clamping diode placed between input rail and ground, coordinated with upstream MOVs and fuses. Use Value: Clamps transients within <1 ns, limiting voltage overshoot to 18.2 V and enabling use of 20 V-rated DC-DC converters without derating. |
Use Scenario: Board-level ESD and surge protection for USB-C CC, SBU, and VBUS lines in portable docking stations and monitors. IC Role / Device Role / Timing Role: Standalone bidirectional TVS on high-speed data and auxiliary power lines where space constraints preclude integrated protection arrays. Use Value: Provides ±15 kV contact / ±25 kV air ESD immunity per IEC 61000-4-2 while adding only 0.106 g mass and fitting within tight SMB footprint. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ11CAHE3_A/H | Same electrical specs but RoHS-compliant commercial grade (E3), not halogen-free or AEC-Q101 qualified. | Lacks automotive qualification and halogen-free certification; suitable for non-automotive industrial or consumer use. | Select when AEC-Q101 or halogen-free compliance is not required and cost optimization is prioritized. |
| SMAJ11CAHM3 | Lower 400 W peak pulse power (vs. 600 W), same VWM/VC, SMA package (smaller thermal mass, higher RθJA). | Reduced surge handling limits use to lower-energy transients (e.g., IEC 61000-4-2 only); less suitable for motor drive or telecom primary protection. | Choose only if board space is constrained and surge threat level is limited to ESD or low-energy coupling. |
Compared with SMBJ11CAHM3_A/H, the SMBJ11CAHE3_A/H offers identical clamping and surge performance without halogen-free or automotive qualification, while the SMAJ11CAHM3 trades 33 % lower pulse power and inferior thermal performance for smaller footprint-neither is pin-compatible nor a drop-in replacement without system-level validation.
Availability
SMBJ11CAHM3_A/H is available at Aetrix Electronics and suitable for industrial motor drives, automotive sensor modules, telecom power supplies, and consumer USB-C interface protection requiring stable component supply and long-term lifecycle assurance.
Supply support for SMBJ11CAHM3_A/H 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 optoelectronics with emphasis on reliability, efficiency, and application-specific performance.
The SMBJ series was developed for high-energy transient suppression in harsh environments, targeting industrial automation, automotive electronics, and infrastructure equipment where robustness and AEC-Q101 compliance are mandatory.
FAQ
What is the clamping voltage of SMBJ11CAHM3_A/H at its rated peak pulse current?
The SMBJ11CAHM3_A/H has a maximum clamping voltage (VC) of 18.2 V at 33.0 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. The SMBJ11CAHM3_A/H maintains this clamping performance across its full operating temperature range (–55 °C to +150 °C) with minimal drift.
Is SMBJ11CAHM3_A/H suitable for automotive applications?
Yes, SMBJ11CAHM3_A/H is AEC-Q101 qualified, as confirmed by the HM3 suffix in its ordering code, which denotes halogen-free, RoHS-compliant, and automotive-grade construction. It undergoes rigorous stress testing including temperature cycling, highly accelerated life testing (HALT), and surge endurance validation. The SMBJ11CAHM3_A/H is approved for use in engine control units, body electronics, and ADAS sensor interfaces where transient immunity and long-term reliability are critical.
How does the SMBJ11CAHM3_A/H differ from unidirectional SMBJ11A variants?
The SMBJ11CAHM3_A/H is bidirectional, meaning it provides symmetrical clamping in both polarities-ideal for AC-coupled or differential signal lines like RS-485 or CAN. In contrast, unidirectional variants such as SMBJ11A have a cathode band marking and conduct only in reverse bias, requiring correct orientation during placement. The SMBJ11CAHM3_A/H has no polarity marking and delivers identical VBR, VC, and IPPM in either direction, simplifying layout and eliminating orientation errors.
What is the thermal resistance and recommended PCB layout for SMBJ11CAHM3_A/H?
The SMBJ11CAHM3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead (RθJL) of 20 °C/W. To achieve rated 600 W pulse power, Vishay specifies mounting on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. Use of internal ground planes and thermal vias beneath pads further reduces thermal impedance. The SMBJ11CAHM3_A/H's MSL Level 1 rating permits standard lead-free reflow without baking.
Does SMBJ11CAHM3_A/H meet industry surge immunity standards?
Yes, the SMBJ11CAHM3_A/H meets IEC 61000-4-5 (surge immunity) up to Level 4 (4 kV line-earth, 2 kV line-line) when applied with appropriate PCB layout and coordination with upstream protection elements. Its 600 W peak pulse power rating is defined using the 10/1000 µs double-exponential waveform specified in that standard. The SMBJ11CAHM3_A/H also complies with IEC 61000-4-2 (ESD) and ISO 16750-2 (automotive) pulse 5a/b when implemented per Vishay's recommended layout guidelines.
SMBJ11CAHM3_A/H 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):
- 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_A/H FAQ
1.How can I place an order for SMBJ11CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ11CAHM3_A/H 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_A/H reliable?
The price and inventory of SMBJ11CAHM3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ11CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMBJ11CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ11CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ11CAHM3_A/H?
SMBJ11CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ11CAHM3_A/H 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_A/H?
For technical support, including SMBJ11CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ11CAHM3_A/H requirements.
6.How does Aetrix verify that SMBJ11CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMBJ11CAHM3_A/H 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_A/H meets industry standards.
7.What is the process for return or replacement of SMBJ11CAHM3_A/H?
All SMBJ11CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ11CAHM3_A/H, 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_A/H part is unused and in its original packaging.
Return procedure for SMBJ11CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ11CAHM3_A/H Tags
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