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Vishay General Semiconductor - Diodes Division SMB8J11CAHM3/I
- Part No.:
- SMB8J11CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J11CAHM3/I.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,212
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Product details
Overview
SMB8J11CAHM3/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection on signal and power lines. 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 44 A peak pulse current (IPPM), and 800 W peak pulse power (PPPM) with 10/1000 μs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMB8J11CAHM3/I datasheet, SMB8J11CAHM3/I pinout, SMB8J11CAHM3/I application, or SMB8J11CAHM3/I equivalent, key selection criteria include bidirectional clamping performance under ISO 7637-2/IEC 61000-4-5 transients, AEC-Q101 qualification status, thermal resistance (RθJA = 72 °C/W), and halogen-free RoHS compliance per HM3 suffix.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, responding within <1 ps to fast-rising transients. Its glass-passivated junction ensures stable VBR tolerance and low leakage (<5 μA at VWM), while the SMB package supports automated SMT placement and meets MSL level 1 (260 °C reflow peak).
Designed for bidirectional operation, SMB8J11CAHM3/I symmetrically clamps both positive and negative surges without polarity marking. It sustains repetitive 800 W pulses under derated conditions up to TJ = 150 °C and delivers 44 A IPPM when mounted on 5.0 mm × 5.0 mm copper pads per JEDEC standard layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 12.2 V / 13.5 V at IT = 1 mA - defines guaranteed breakdown threshold window for design margining |
| VC @ IPPM | 18.2 V at 44 A - clamping voltage during 10/1000 μs surge, limiting downstream IC stress |
| PPPM | 800 W - peak transient power handling capability under standardized waveform |
| ID @ VWM | ≤5 μA - ultra-low leakage preserves signal integrity in high-impedance sensor circuits |
| TJ max | +150 °C - enables operation in under-hood automotive environments |
| RθJA | 72 °C/W - thermal resistance from junction to ambient, critical for power derating above 25 °C |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional device with no polarity marking; matte tin-plated leads, compliant with J-STD-002 solderability and JESD 22-B102 whisker testing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Connects to protected line; conducts during negative surges and provides reference for clamping |
| Cathode | Transient return path (bidirectional) | Connects to protected line; conducts during positive surges - functionally identical to anode in bidirectional configuration |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
| Halogen-free & RoHS-compliant (HM3) | Meets environmental compliance requirements for Tier-1 automotive supply chains |
| Low incremental surge resistance | Enables tighter VC/VBR ratio (18.2 V / 12.2 V ≈ 1.49), improving protection margin over competing TVS devices |
| MSL Level 1 rating | Supports lead-free reflow up to 260 °C peak without moisture-induced damage |
| Glass passivated junction | Ensures long-term VBR stability and low leakage drift across 15-year automotive service life |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and inductive switching spikes in engine control units. IC Role / Device Role / Timing Role: Bidirectional shunt clamp placed between signal line and ground, absorbing energy before it reaches the transceiver's ESD structure. Use Value: Limits transient voltage to ≤18.2 V during 44 A surges, preventing latch-up or gate oxide damage in 5 V/3.3 V interface ICs. | Use Scenario: Safeguarding PLC digital input modules against field-wiring induced surges from relay coils or motor drives. IC Role / Device Role / Timing Role: Primary front-end surge absorber on 24 V DC input channels, placed before optocoupler or Schmitt trigger input stage. Use Value: Withstands repeated 800 W transients without degradation, maintaining consistent clamping performance over >10⁵ surge events. |
| Telecom Line Interface | Consumer Appliance Motor Control |
Use Scenario: Shielding RS-485 transceivers and Ethernet PHYs from lightning-induced surges on outdoor cabling in base stations and network equipment. IC Role / Device Role / Timing Role: Secondary-level protection device located after gas discharge tube (GDT) primary stage, providing low-clamp refinement. Use Value: Delivers 18.2 V clamping at 44 A - 22% lower than typical 23 V alternatives - reducing stress on downstream TVS arrays and IC ESD cells. | Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machines and HVAC blowers connected to microcontroller GPIOs. IC Role / Device Role / Timing Role: Fast-response shunt element across motor terminals or MCU input pins, diverting inductive kickback energy to ground. Use Value: Responds in <1 ps and handles 100 A single-pulse surge (IFSM not rated for bidirectional, but IPPM = 44 A reflects practical surge capacity), preventing MCU reset or ADC corruption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J11CAHE3/I | Same electrical specs; RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification | Suitable for commercial/industrial use only; not approved for automotive ECUs or ADAS modules | Select when halogen-free content and automotive qualification are not required, and cost optimization is prioritized. |
| SMAJ11CA | Lower PPPM (400 W), higher VC (23.2 V at 17.3 A), SMA package (smaller footprint, higher RθJA) | Acceptable for low-energy surges (e.g., USB, audio lines); insufficient for ISO 7637-2 Pulse 5a/b in automotive | Choose only for space-constrained non-automotive designs where 800 W surge immunity is not mandated. |
Compared with SMB8J11CAHE3/I and SMAJ11CA, SMB8J11CAHM3/I uniquely combines AEC-Q101 qualification, halogen-free construction, and 800 W bidirectional surge capability in SMB package - making it the sole option for production automotive sensor nodes requiring full compliance and robust clamping.
Availability
SMB8J11CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and consumer appliance motor control requiring stable component supply and long-term lifecycle support.
Supply support for SMB8J11CAHM3/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 SMB8JxxCA series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for high-power, bidirectional transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure applications demanding AEC-Q101 validation.
FAQ
What is the clamping voltage of SMB8J11CAHM3/I at its rated peak pulse current?
The SMB8J11CAHM3/I has a maximum clamping voltage (VC) of 18.2 V at 44 A peak pulse current (IPPM) under 10/1000 μs waveform conditions. This value is measured with the device mounted on 5.0 mm × 5.0 mm copper pads per JEDEC standard layout and represents the upper limit of voltage seen by downstream circuitry during surge events - critical for ensuring compatibility with 3.3 V or 5 V interface ICs.
Is SMB8J11CAHM3/I suitable for automotive applications?
Yes, SMB8J11CAHM3/I is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction validated for automotive use. It meets requirements for engine control, body electronics, and ADAS sensor modules where transient immunity to ISO 7637-2 and IEC 61000-4-5 is mandatory - confirmed by Vishay's qualification report referenced in document 88422.
What does the "HM3" suffix mean in SMB8J11CAHM3/I?
The "HM3" suffix in SMB8J11CAHM3/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from E3 (RoHS only) and HE3 (AEC-Q101, non-halogen-free) versions. The "I" indicates 13-inch tape-and-reel packaging (3200 units/reel), enabling high-volume SMT assembly.
How does SMB8J11CAHM3/I differ from unidirectional SMB10J11A?
SMB8J11CAHM3/I is bidirectional with symmetrical clamping for ± transients and no cathode band marking, whereas SMB10J11A is unidirectional (cathode-banded), rated for 1000 W PPPM and 100 A IFSM. SMB8J11CAHM3/I offers lower IPPM (44 A) but matches the same VWM (11 V) and VC (18.2 V), making it ideal for AC-coupled or differential signal lines where polarity reversal occurs.
What is the thermal resistance of SMB8J11CAHM3/I, and why does it matter?
SMB8J11CAHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W. This parameter determines how much the junction temperature rises per watt of dissipated surge power - essential for derating calculations above 25 °C ambient. For example, at 800 W peak power, even brief exposure requires careful PCB copper area design to avoid exceeding TJ(max) = 150 °C.
SMB8J11CAHM3/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):
- 44A
- Power - Peak Pulse:
- 800W
- 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)
SMB8J11CAHM3/I FAQ
1.How can I place an order for SMB8J11CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J11CAHM3/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 SMB8J11CAHM3/I reliable?
The price and inventory of SMB8J11CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J11CAHM3/I is usually 5 days.
3.What payment methods are accepted for SMB8J11CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J11CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J11CAHM3/I?
SMB8J11CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J11CAHM3/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 SMB8J11CAHM3/I?
For technical support, including SMB8J11CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J11CAHM3/I requirements.
6.How does Aetrix verify that SMB8J11CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SMB8J11CAHM3/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 SMB8J11CAHM3/I meets industry standards.
7.What is the process for return or replacement of SMB8J11CAHM3/I?
All SMB8J11CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J11CAHM3/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 SMB8J11CAHM3/I part is unused and in its original packaging.
Return procedure for SMB8J11CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J11CAHM3/I Tags
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