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Vishay General Semiconductor - Diodes Division SMB8J11CAHM3_A/H
- Part No.:
- SMB8J11CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J11CAHM3_A/H.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMB8J11CAHM3_A/H 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 12.2 V minimum breakdown voltage (VBR), 11 V standoff voltage (VWM), 18.2 V clamping voltage (VC) at 44.0 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_A/H datasheet, SMB8J11CAHM3_A/H pinout, SMB8J11CAHM3_A/H application, or SMB8J11CAHM3_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low clamping ratio (VC/VWM = 1.65), MSL Level 1 moisture sensitivity, and halogen-free RoHS compliance per HM3 suffix.
Technical Context
This bidirectional TVS diode operates symmetrically across both polarities, enabling robust protection against ESD, lightning-induced transients, and inductive switching spikes without polarity constraints. Its glass-passivated junction ensures stable VBR tolerance (±10%), low leakage (<5 µA at VWM), and fast response time (<1 ns).
Thermally, it delivers RθJA = 72 °C/W and RθJL = 20 °C/W, supporting reliable operation up to TJ = +150 °C. The device meets AEC-Q101 stress testing requirements and is rated for repetitive surge events when derated above 25 °C ambient per Fig. 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 12.2 V / 13.5 V at 1.0 mA test current - defines precise voltage threshold where avalanche conduction begins under reverse bias |
| VWM | 11 V - maximum continuous working voltage before significant leakage; sets safe operating margin for 12 V nominal systems |
| VC @ IPPM | 18.2 V at 44.0 A (10/1000 µs) - clamped voltage seen by protected circuit during worst-case surge, limiting stress on downstream ICs |
| PPPM | 800 W - peak transient power dissipation capacity; enables protection against IEC 61000-4-5 Level 3 (1 kV/42 Ω) surges |
| IPPM | 44.0 A - peak surge current handling with defined clamping; determines minimum trace width and PCB copper pad sizing (0.2" × 0.2") |
| TJ max. | +150 °C - maximum junction temperature rating supports under-hood automotive and industrial environments without thermal shutdown |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including HTOL, TC, UHAST, and ESD (HBM ≥ 8 kV, CDM ≥ 1 kV) |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, matte tin-plated leads, MSL Level 1 (260 °C reflow peak), 0.220" × 0.130" footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Transient current return path in negative half-cycle | Provides symmetrical conduction path during bidirectional surges; no polarity marking required |
| Cathode (unmarked end) | Transient current return path in positive half-cycle | Enables clamping in both directions; identical terminal function due to bidirectional construction |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Protects AC-coupled and floating signal lines (e.g., CAN, LIN, RS-485) without external polarity management |
| AEC-Q101 qualification | Validated for automotive electronics including engine control modules, ADAS sensors, and body ECUs |
| Low clamping ratio (VC/VWM = 1.65) | Minimizes overvoltage exposure to protected ICs while maintaining margin above system rail |
| MSL Level 1 rating | Enables standard SMT reflow without baking; compatible with high-volume automated assembly |
| Halogen-free & RoHS-compliant (HM3) | Meets automotive OEM environmental requirements and JEDEC JESD201 Class 2 whisker resistance |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting analog/digital outputs of pressure, temperature, and position sensors in engine bay and chassis modules. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between sensor output and microcontroller input or CAN transceiver. Use Value: Limits transient overshoot to ≤18.2 V during load dump or ISO 7637-2 pulse 5a, preserving ADC accuracy and logic-level integrity. |
Use Scenario: Safeguarding PLC digital input channels exposed to 24 V DC field wiring with inductive load switching noise. IC Role / Device Role / Timing Role: Primary surge suppression element on each input channel, mounted adjacent to connector entry point. Use Value: Absorbs 800 W surges without degradation, enabling >100,000 surge cycles per IEC 61000-4-5 compliance testing. |
| Automotive Body Control Module | Consumer Appliance Motor Driver |
Use Scenario: Shielding LIN bus lines and LED driver outputs in door modules, lighting controllers, and seat control units. IC Role / Device Role / Timing Role: Low-capacitance TVS on LIN data line and 12 V supply rail, placed before level-shifter and regulator stages. Use Value: Maintains signal integrity with <10 pF junction capacitance at 0 V bias while meeting ISO 16750-2 electrical load dump immunity. |
Use Scenario: Suppressing back-EMF spikes from brushed DC motors in washing machines, HVAC blowers, and power tools. IC Role / Device Role / Timing Role: Across-motor terminals or on H-bridge supply rails to clamp inductive kickback during PWM commutation. Use Value: Withstands 100 A non-repetitive forward surge (IFSM) and repeated 44 A pulses, extending MOSFET lifetime and reducing EMI. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J11CAHE3_A/H | Same electrical specs; RoHS-compliant but not halogen-free (E3 vs HM3); no JESD201 Class 2 whisker rating | Suitable for commercial/industrial use where halogen-free requirement is absent | Select HM3 for automotive Tier-1 supply chains requiring halogen-free compliance and whisker resistance. |
| SMAJ11CA | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (95 °C/W), same VBR/VC values | Used where board space is constrained but surge energy is lower (e.g., consumer USB ports) | Choose SMB8J11CAHM3_A/H when 800 W surge handling and automotive qualification are mandatory. |
Compared with SMB8J11CAHE3_A/H and SMAJ11CA, SMB8J11CAHM3_A/H uniquely combines AEC-Q101 qualification, halogen-free construction, and 800 W bidirectional surge capacity in SMB package - making it the only option qualified for safety-critical automotive signal line protection with full supply-chain compliance.
Availability
SMB8J11CAHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial digital I/O protection, and body control module designs requiring stable component supply, long-term lifecycle support, and certified AEC-Q101 performance.
Supply support for SMB8J11CAHM3_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, MOSFETs, and protection devices with emphasis on reliability, power density, and automotive-grade validation.
The SMB8JxxCA series belongs to Vishay's TRANSZORB® high-power TVS family, engineered specifically for AEC-Q101-compliant transient suppression in harsh automotive and industrial environments where bidirectional clamping and thermal robustness are critical.
FAQ
What is the clamping voltage of SMB8J11CAHM3_A/H at its rated peak pulse current?
The SMB8J11CAHM3_A/H has a maximum clamping voltage (VC) of 18.2 V at 44.0 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured under standardized surge conditions and defines the upper voltage limit imposed on protected circuitry during transient events. The SMB8J11CAHM3_A/H maintains this clamping performance across its qualified operating temperature range of -55 °C to +150 °C.
Is SMB8J11CAHM3_A/H suitable for automotive applications?
Yes, SMB8J11CAHM3_A/H is AEC-Q101 qualified and manufactured with halogen-free, RoHS-compliant materials (HM3 suffix), meeting stringent automotive reliability standards including HTOL, temperature cycling, and ESD testing. Its 150 °C junction rating, MSL Level 1 reflow compatibility, and bidirectional clamping make SMB8J11CAHM3_A/H appropriate for engine control units, ADAS sensors, and body electronics in passenger and commercial vehicles.
How does the SMB8J11CAHM3_A/H differ from unidirectional variants like SMB10J11A?
SMB8J11CAHM3_A/H is bidirectional with symmetrical clamping behavior in both polarities, while SMB10J11A is unidirectional and conducts only in reverse bias. SMB8J11CAHM3_A/H offers 800 W PPPM, whereas SMB10J11A delivers 1000 W but requires correct polarity orientation. The SMB8J11CAHM3_A/H's bidirectional nature eliminates polarity concerns in AC or floating signal paths - a key distinction for CAN, LIN, and differential bus protection where SMB10J11A cannot be substituted.
What is the standoff voltage (VWM) and why is it important for SMB8J11CAHM3_A/H?
The standoff voltage (VWM) of SMB8J11CAHM3_A/H is 11 V - the maximum continuous reverse voltage the device can block without entering avalanche conduction. This parameter ensures normal circuit operation without leakage or power loss, while providing sufficient margin below the 12.2 V minimum breakdown voltage. For a 12 V automotive system, VWM = 11 V allows safe operation during battery transients up to ±10 % while retaining headroom for clamping action during surges.
Does SMB8J11CAHM3_A/H require special PCB layout considerations?
Yes - Vishay specifies mounting on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve rated 800 W pulse power and thermal performance. Short, wide traces minimize inductance and preserve clamping speed; ground planes must be solid beneath the SMB footprint to reduce thermal resistance (RθJA = 72 °C/W). Avoid thermal relief on pads, and ensure solder mask clearance matches the DO-214AA outline to prevent tombstoning during reflow. These practices are essential to realize the full protection capability of SMB8J11CAHM3_A/H.
SMB8J11CAHM3_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):
- 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_A/H FAQ
1.How can I place an order for SMB8J11CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J11CAHM3_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 SMB8J11CAHM3_A/H reliable?
The price and inventory of SMB8J11CAHM3_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 SMB8J11CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMB8J11CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J11CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J11CAHM3_A/H?
SMB8J11CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J11CAHM3_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 SMB8J11CAHM3_A/H?
For technical support, including SMB8J11CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J11CAHM3_A/H requirements.
6.How does Aetrix verify that SMB8J11CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMB8J11CAHM3_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 SMB8J11CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMB8J11CAHM3_A/H?
All SMB8J11CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J11CAHM3_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 SMB8J11CAHM3_A/H part is unused and in its original packaging.
Return procedure for SMB8J11CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J11CAHM3_A/H Tags
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