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Vishay General Semiconductor - Diodes Division SMB8J11CAHE3_A/I
- Part No.:
- SMB8J11CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J11CAHE3_A/I.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,679
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Product details
Overview
SMB8J11CAHE3_A/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 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 (10/1000 µs waveform), qualified to AEC-Q101 for automotive electronics.
For engineers reviewing the SMB8J11CAHE3_A/I datasheet, SMB8J11CAHE3_A/I pinout, SMB8J11CAHE3_A/I application, or SMB8J11CAHE3_A/I equivalent, this device serves as a robust, surface-mount solution for protecting CAN bus transceivers, automotive sensor interfaces, and 12 V power rails against ESD, load dump, and inductive switching transients - with verified thermal resistance (RθJA = 72 °C/W) and low leakage (<5.0 µA at VWM).
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable VBR tolerance (±10%), fast response time (<1 ns), and low incremental surge resistance - critical for limiting voltage overshoot during sub-microsecond transients.
The device is rated for continuous operation from –55 °C to +150 °C junction temperature and meets MSL Level 1 per J-STD-020 (peak reflow 260 °C). Its matte tin-plated leads comply with J-STD-002 and JESD 22-B102, and it satisfies AEC-Q101 stress testing for automotive under-hood and infotainment applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 12.2 V / 13.5 V at 1.0 mA test current - defines reliable conduction onset under surge conditions |
| VWM | 11 V - maximum continuous reverse voltage before significant leakage; matches 12 V nominal system rails |
| VC @ IPPM | 18.2 V at 44.0 A (10/1000 µs) - clamped voltage seen by protected ICs during worst-case surge |
| PPPM | 800 W - peak surge energy absorption capability without failure under standardized waveform |
| IPPM | 44.0 A - maximum non-repetitive surge current the device safely clamps without degradation |
| RθJA | 72 °C/W - thermal resistance from junction to ambient on standard 0.2" × 0.2" copper pads |
| Leakage @ VWM | <5.0 µA - negligible standby power loss and signal integrity impact in always-on circuits |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking - symmetrical terminals suitable for placement across differential or AC lines without orientation dependency.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals function identically; bidirectional clamping occurs regardless of voltage polarity |
| Case (body) | Thermal and mechanical interface | Plastic molded body with UL 94 V-0 rating; transfers heat to PCB copper pads via soldered leads |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock |
| Glass-passivated junction | Ensures long-term VBR stability and low parameter drift over lifetime and thermal stress |
| MSL Level 1 rating | Enables standard SMT reflow without moisture-related popcorning or delamination |
| Low clamping ratio (VC/VWM = 1.65) | Minimizes overvoltage stress on downstream components during surge events |
| Matte tin lead finish | Guarantees solderability per J-STD-002 and whisker resistance per JESD 201 Class 2 |
Applications
| Automotive CAN Bus Protection | Industrial Sensor Signal Lines |
|---|---|
Use Scenario: Protecting high-speed CAN FD transceivers (e.g., TJA1057) from ESD and load-dump-induced transients in vehicle body control modules. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector interface to shunt surge energy before reaching transceiver pins. Use Value: Maintains CAN signal integrity by limiting line voltage to ≤18.2 V during 44 A surges, preventing transceiver latch-up or damage. |
Use Scenario: Safeguarding analog outputs (4–20 mA) and digital I/O (RS-485) of pressure/temperature sensors in factory automation PLCs. IC Role / Device Role / Timing Role: Low-capacitance TVS mounted at field-wire entry point to absorb inductive kickback from solenoid actuation. Use Value: Enables uninterrupted sensor operation with <5.0 µA leakage at 11 V, avoiding measurement offset or false triggering. |
| 12 V Power Rail Protection | Automotive Infotainment USB Interface |
Use Scenario: Secondary overvoltage protection on fused 12 V supply lines feeding ADAS camera modules and radar ECUs. IC Role / Device Role / Timing Role: Standoff-clamp TVS operating in parallel with primary protection (e.g., polyfuse + upstream TVS) to handle residual energy. Use Value: Absorbs up to 800 W surge energy while maintaining VC ≤18.2 V - compatible with 24 V tolerant input stages of PMICs like TPS65381. |
Use Scenario: ESD suppression on USB 2.0 D+/D− lines in head unit applications exposed to human-body-model (HBM) discharges. IC Role / Device Role / Timing Role: Fast-response (<1 ns) bidirectional clamp placed adjacent to USB connector to divert HBM/IEC61000-4-2 pulses. Use Value: Achieves ±30 kV contact ESD immunity without signal distortion due to symmetrical clamping and low dynamic impedance. |
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/I | Unidirectional variant with identical VBR, VWM, and VC, but asymmetric conduction (cathode-marked); lower IPPM (38.5 A vs. 44.0 A) and PPPM (600 W vs. 800 W) | Requires polarity-aware layout; unsuitable for AC/differential lines without external biasing | Select only when unidirectional protection suffices and board space allows cathode alignment |
| SMCJ11CAHE3_A/I | Larger SMC (DO-214AB) package; same electrical specs but higher IPPM (64.9 A) and PPPM (1500 W); RθJA = 35 °C/W | Occupies ~2.5× PCB area; better thermal performance but incompatible with dense automotive layouts | Choose when system-level surge requirements exceed 800 W or junction temperature must stay below 125 °C under sustained stress |
Compared with SMBJ11CAHE3_A/I and SMCJ11CAHE3_A/I, SMB8J11CAHE3_A/I delivers optimal balance of 800 W surge capacity, compact SMB footprint, and AEC-Q101 compliance - making it the preferred choice for space-constrained, bidirectional 12 V automotive signal protection where thermal margin and layout simplicity are prioritized.
Availability
SMB8J11CAHE3_A/I is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and 12 V power rail protection requiring stable component supply across production lifecycles.
Supply support for SMB8J11CAHE3_A/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 automotive-grade qualification.
The SMB8JxxCA series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-power-density, AEC-Q101-compliant transient suppression in harsh automotive and industrial environments.
FAQ
What is the clamping voltage of SMB8J11CAHE3_A/I at its rated peak pulse current?
The SMB8J11CAHE3_A/I has a maximum clamping voltage (VC) of 18.2 V when subjected to its rated peak pulse current of 44.0 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees predictable voltage limiting during surge events, ensuring downstream ICs remain within safe operating limits. The SMB8J11CAHE3_A/I maintains this performance across its full operating temperature range (–55 °C to +150 °C).
Is SMB8J11CAHE3_A/I suitable for bidirectional signal line protection?
Yes, SMB8J11CAHE3_A/I is explicitly designed as a bidirectional TVS diode, with symmetrical breakdown characteristics in both polarities. Its datasheet specifies matched VBR min/max (12.2 V / 13.5 V) and identical clamping behavior regardless of voltage polarity - making it ideal for protecting differential interfaces like RS-485, CAN, or USB data lines without requiring orientation-specific layout. The SMB8J11CAHE3_A/I has no polarity marking on the SMB package body.
Does SMB8J11CAHE3_A/I meet automotive qualification standards?
Yes, SMB8J11CAHE3_A/I is AEC-Q101 qualified and manufactured with the HE3 suffix denoting RoHS-compliant and automotive-grade construction. It passes stress tests including temperature cycling, high-temperature operating life, and ESD per AEC-Q101 Rev D. The device is intended for use in engine control units, body electronics, and infotainment systems where reliability under extended thermal and vibration profiles is mandatory. The SMB8J11CAHE3_A/I also meets MSL Level 1 for lead-free reflow compatibility.
How does the thermal performance of SMB8J11CAHE3_A/I compare to larger package alternatives?
SMB8J11CAHE3_A/I exhibits a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W when mounted on 0.2" × 0.2" copper pads - higher than SMC-packaged equivalents (e.g., SMCJ11CAHE3_A/I at 35 °C/W) due to smaller surface area. This means SMB8J11CAHE3_A/I requires careful PCB thermal design for repeated surge events, but remains appropriate for single-event or low-duty-cycle protection. Its RθJL of 20 °C/W confirms efficient heat transfer to PCB traces, supporting reliable operation in compact automotive modules.
What is the maximum leakage current of SMB8J11CAHE3_A/I at its standoff voltage?
The SMB8J11CAHE3_A/I specifies a maximum reverse leakage current (ID) of 5.0 µA at its 11 V standoff voltage (VWM) and 25 °C ambient temperature. This low leakage ensures minimal power loss and avoids interference with precision analog sensing or always-on microcontroller inputs. Leakage remains well below 10 µA across the full –55 °C to +125 °C operating range, as confirmed in Vishay's characterization data for the SMB8JxxCA family.
SMB8J11CAHE3_A/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:
- 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:
- -
- 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_A/I FAQ
1.How can I place an order for SMB8J11CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J11CAHE3_A/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 SMB8J11CAHE3_A/I reliable?
The price and inventory of SMB8J11CAHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J11CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMB8J11CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J11CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J11CAHE3_A/I?
SMB8J11CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J11CAHE3_A/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 SMB8J11CAHE3_A/I?
For technical support, including SMB8J11CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J11CAHE3_A/I requirements.
6.How does Aetrix verify that SMB8J11CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMB8J11CAHE3_A/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 SMB8J11CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMB8J11CAHE3_A/I?
All SMB8J11CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J11CAHE3_A/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 SMB8J11CAHE3_A/I part is unused and in its original packaging.
Return procedure for SMB8J11CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J11CAHE3_A/I Tags
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Diodes Incorporated
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