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Vishay General Semiconductor - Diodes Division SMB8J11CAHE3/52
- Part No.:
- SMB8J11CAHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J11CAHE3/52.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,334
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Product details
Overview
SMB8J11CAHE3/52 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, and 800 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMB8J11CAHE3/52 datasheet, SMB8J11CAHE3/52 pinout, SMB8J11CAHE3/52 application, or SMB8J11CAHE3/52 equivalent, this AEC-Q101 qualified TVS offers verified bidirectional clamping performance, low leakage (<5 µA at VWM), and MSL Level 1 moisture sensitivity - critical for automotive-grade board-level ESD and load-dump resilience validation.
Technical Context
This device operates as a voltage-clamped shunt protector: under transient overvoltage exceeding VWM = 11 V, it avalanches symmetrically in both directions to clamp line voltage to ≤18.2 V while diverting up to 44.0 A (10/1000 µs). Its glass-passivated junction ensures stable VBR tolerance (12.2–13.5 V) and fast response (<1 ns), enabling protection of downstream analog front-ends and CAN transceivers.
Thermally, it sustains operation from –55 °C to +150 °C junction temperature, with RθJA = 72 °C/W (on 5.0 mm × 5.0 mm copper pads) and RθJL = 20 °C/W - supporting reliable derating in enclosed automotive ECUs. The matte tin-plated leads meet J-STD-002 solderability and JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - Maximum continuous reverse operating voltage before avalanche conduction begins; defines safe signal swing margin for 12 V automotive bus lines. |
| VBR (min/max) | 12.2 V / 13.5 V - Breakdown voltage range at 1.0 mA test current; ensures consistent clamping onset across production lots. |
| VC @ IPPM | 18.2 V at 44.0 A - Clamped voltage during 800 W surge; guarantees downstream ICs see <18.2 V even under worst-case 10/1000 µs transients. |
| IPPM | 44.0 A - Peak pulse current capability with 10/1000 µs waveform; supports ISO 7637-2 Pulse 1/2/5a compliance testing. |
| PPPM | 800 W - Peak pulse power rating; enables robust protection against load dump and inductive switching surges in vehicle subsystems. |
| ID @ VWM | ≤5.0 µA - Reverse leakage at 11 V; minimizes quiescent power loss and avoids false triggering in high-impedance sensor circuits. |
| TJ max | +150 °C - Maximum junction temperature; allows operation in engine bay or powertrain control modules without thermal shutdown. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with cathode band marking omitted per bidirectional configuration. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); terminals are matte tin-plated, compatible with lead-free reflow (peak 260 °C, MSL Level 1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction | No polarity distinction - either terminal serves as anode or cathode depending on transient polarity; enables single-device protection of AC-coupled or differential lines. |
| Case (body) | Thermal and mechanical interface | Plastic molding meets UL 94 V-0; copper pad layout (5.0 mm × 5.0 mm per terminal) required to achieve rated 800 W pulse power and thermal resistance of 72 °C/W. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control, body electronics, and ADAS sensors - supports PPAP and long-term reliability under thermal cycling and humidity. |
| Glass-passivated junction | Ensures stable VBR and low leakage over lifetime; eliminates risk of passivation degradation under high-humidity or high-temperature operating conditions. |
| MSL Level 1 rating | Allows unlimited floor life and standard SMT reflow without baking; simplifies manufacturing for high-volume automotive PCB assembly. |
| Low incremental surge resistance | Enables tighter clamping (VC − VBR = 6.0 V) and higher energy absorption efficiency compared to legacy TVS devices in same package. |
| UL 94 V-0 compliant molding | Meets flammability safety requirements for under-hood and cabin-mounted electronics, reducing fire risk during electrical fault events. |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from battery load dump and alternator ripple in passenger vehicles. IC Role / Device Role / Timing Role: Bidirectional shunt clamping element placed directly at connector entry point to limit transient voltage before reaching ASIC input pins. Use Value: Maintains signal integrity below 18.2 V during 800 W surges, preventing latch-up or gate oxide damage in 3.3 V/5 V sensor signal chains. |
Use Scenario: Safeguarding PLC digital input modules against induced surges from relay coil switching and motor drive noise in factory automation systems. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V DC input lines, coordinated with series impedance to limit let-through energy. Use Value: Enables >100,000 surge cycles at 44.0 A without parameter shift, ensuring long-term field reliability in unattended industrial environments. |
| Automotive Body Control Module | Telecom Line Interface |
Use Scenario: Guarding door module microcontroller GPIOs and LED driver outputs against ESD and cable discharge events in 12 V vehicle networks. IC Role / Device Role / Timing Role: Localized TVS at each protected node, leveraging low capacitance (<100 pF) to avoid signal distortion on PWM-controlled lighting lines. Use Value: Delivers <5 µA leakage at 11 V, eliminating standby current penalties in always-on body electronics with strict quiescent power budgets. |
Use Scenario: Protecting RS-485 transceiver inputs in outdoor telecom base station equipment exposed to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: First-stage surge diverter ahead of secondary protection (e.g., GDT + MOV), absorbing bulk energy before downstream components. Use Value: Withstands repeated 10/1000 µs transients up to 800 W, extending system uptime and reducing field failure rates in harsh outdoor deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J11CAHM3/52 | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification; same SMB package and pinout. | Required where halogen-free material compliance is mandated by OEM environmental specifications (e.g., VW 80101). | Select when full halogen-free BOM compliance is contractually required; no design or layout changes needed. |
| SMBJ11CAHE3/52 | Same VWM, VBR, and VC, but rated for 1000 W unidirectional PPPM (vs. 800 W bidirectional); not bidirectional - requires polarity-aware placement. | Suitable only for DC-biased lines where polarity is fixed (e.g., 12 V supply rail); cannot protect AC or differential signals. | Choose only for unidirectional 12 V rail protection; verify circuit polarity and replace with bidirectional SMB8J11CAHE3/52 if signal inversion or AC coupling exists. |
Compared with SMB8J11CAHE3/52, SMB8J11CAHM3/52 offers identical protection performance with halogen-free construction, while SMBJ11CAHE3/52 provides higher 1000 W pulse rating but lacks bidirectional capability - making SMB8J11CAHE3/52 the sole choice for polarity-agnostic surge suppression in modern automotive and industrial interfaces.
Availability
SMB8J11CAHE3/52 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O hardening, and telecom line interface applications requiring stable component supply, AEC-Q101 traceability, and long-lifecycle support.
Supply support for SMB8J11CAHE3/52 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, precision, and automotive-grade qualification.
The SMB8JxxCA family is engineered specifically for bidirectional transient suppression in harsh automotive and industrial environments - delivering AEC-Q101 validated performance in compact SMB packages for space-constrained ECU designs.
FAQ
What is the clamping voltage of SMB8J11CAHE3/52 at its rated peak pulse current?
The SMB8J11CAHE3/52 has a maximum clamping voltage (VC) of 18.2 V at its rated peak pulse current (IPPM) of 44.0 A with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 standards and ensures downstream ICs remain within safe operating voltage limits during surge events. The SMB8J11CAHE3/52 achieves this clamping performance while maintaining low leakage and AEC-Q101 qualification.
Is SMB8J11CAHE3/52 suitable for automotive applications?
Yes, SMB8J11CAHE3/52 is AEC-Q101 qualified and explicitly designated for automotive use with suffix "HE3" indicating RoHS-compliant and automotive-grade qualification. It supports operating temperatures from –55 °C to +150 °C, meets MSL Level 1, and is used in body control modules, sensor interfaces, and infotainment systems. The SMB8J11CAHE3/52 data sheet confirms its suitability for load-dump and ESD protection per ISO 16750 and ISO 10605.
What is the standoff voltage (VWM) of SMB8J11CAHE3/52, and why does it matter?
The standoff voltage (VWM) of SMB8J11CAHE3/52 is 11 V - the maximum DC or continuous reverse voltage the device can block without entering avalanche conduction. This parameter ensures compatibility with nominal 12 V automotive systems, allowing normal operation while remaining fully inactive until transients exceed the threshold. Selecting SMB8J11CAHE3/52 with VWM = 11 V prevents false triggering and preserves signal integrity in 12 V rail and sensor line protection.
How does SMB8J11CAHE3/52 differ from unidirectional TVS diodes like SMBJ11CAHE3/52?
SMB8J11CAHE3/52 is bidirectional and protects both polarities of a signal line without regard to orientation, whereas SMBJ11CAHE3/52 is unidirectional and must be placed with correct cathode/anode alignment relative to DC bias. SMB8J11CAHE3/52 delivers 800 W peak pulse power in bidirectional mode, while SMBJ11CAHE3/52 offers 1000 W but only in one direction. For AC-coupled, differential, or polarity-unknown interfaces, SMB8J11CAHE3/52 is mandatory - the SMB8J11CAHE3/52 part number reflects this fundamental functional distinction.
What package type does SMB8J11CAHE3/52 use, and what are its mounting requirements?
SMB8J11CAHE3/52 uses the SMB (DO-214AA) surface-mount package, measuring 4.57 mm × 3.94 mm × 2.20 mm, with matte tin-plated leads rated for lead-free reflow (260 °C peak, MSL Level 1). To achieve rated 800 W pulse power and thermal resistance of 72 °C/W, it must be mounted on minimum 5.0 mm × 5.0 mm copper pads per terminal. The SMB8J11CAHE3/52 footprint is standardized and compatible with automated pick-and-place equipment.
SMB8J11CAHE3/52 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB8J11CAHE3/52 FAQ
1.How can I place an order for SMB8J11CAHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J11CAHE3/52 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 SMB8J11CAHE3/52 reliable?
The price and inventory of SMB8J11CAHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J11CAHE3/52 is usually 5 days.
3.What payment methods are accepted for SMB8J11CAHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J11CAHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J11CAHE3/52?
SMB8J11CAHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J11CAHE3/52 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 SMB8J11CAHE3/52?
For technical support, including SMB8J11CAHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J11CAHE3/52 requirements.
6.How does Aetrix verify that SMB8J11CAHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMB8J11CAHE3/52 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 SMB8J11CAHE3/52 meets industry standards.
7.What is the process for return or replacement of SMB8J11CAHE3/52?
All SMB8J11CAHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J11CAHE3/52, 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 SMB8J11CAHE3/52 part is unused and in its original packaging.
Return procedure for SMB8J11CAHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J11CAHE3/52 Tags
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