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Vishay General Semiconductor - Diodes Division SMBJ11CAHE3_A/I
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- Part No.:
- SMBJ11CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ11CAHE3_A/I.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,898
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Product details
Overview
SMBJ11CAHE3_A/I 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 and power lines. It features a 11 V stand-off voltage (VWM), 12.2–13.5 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), and clamps to ≤18.2 V at 33 A peak surge current. It is AEC-Q101 qualified and used for protecting MOSFETs, ICs, and sensor signal lines in automotive and industrial systems.
For engineers reviewing the SMBJ11CAHE3_A/I datasheet, SMBJ11CAHE3_A/I pinout, SMBJ11CAHE3_A/I application, or SMBJ11CAHE3_A/I equivalent, key selection criteria include bidirectional clamping capability, 18.2 V max clamping voltage at rated IPPM, AEC-Q101 qualification status, SMB package thermal resistance (RθJA = 100 °C/W), and compatibility with automated SMT placement per J-STD-002.
Technical Context
This device operates as a voltage-clamped transient protector with symmetrical avalanche behavior in both directions, enabling protection of AC-coupled or differential signal paths without polarity concerns. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1 µA at VWM), while the 10/1000 µs waveform rating reflects standardized lightning/surge immunity testing per ANSI/IEEE C62.35.
The SMBJ11CAHE3_A/I exhibits a temperature coefficient of VBR at +0.080 %/°C and is rated for operation from –55 °C to +150 °C junction temperature. Its 20 °C/W junction-to-lead thermal resistance supports localized heat dissipation during repetitive surge events when mounted on recommended 5.0 mm × 5.0 mm copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 11 V - Maximum continuous reverse voltage before significant leakage; defines operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 12.2–13.5 V at 1 mA - Confirmed avalanche initiation range; ensures reliable turn-on before damage to protected circuitry. |
| VC (Clamping Voltage) | ≤18.2 V at IPPM = 33 A - Peak voltage seen by downstream components during 10/1000 µs surge; critical for IC-level protection. |
| PPPM (Peak Pulse Power) | 600 W - Surge energy handling capacity under standard 10/1000 µs waveform; validates robustness against IEC 61000-4-5 Level 4 transients. |
| ID (Max Reverse Leakage) | ≤1 µA at VWM - Minimal standby power loss and signal integrity impact in high-impedance circuits. |
| TJ max. | +150 °C - Enables use in under-hood automotive environments and thermally constrained industrial enclosures. |
| Package | SMB (DO-214AA) - Standardized SMT footprint (5.21 mm × 4.06 mm × 2.20 mm); compatible with JEDEC MS-012AC and automated pick-and-place. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102. Molding compound meets UL 94 V-0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction | No functional distinction between terminals; either terminal may connect to line or ground-enables flexible PCB layout for AC or differential signals. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD; required for under-hood and ADAS sensor protection. |
| 600 W peak pulse power (10/1000 µs) | Withstands repeated surges up to 33 A without degradation-meets IEC 61000-4-5 surge immunity requirements for industrial equipment. |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes overvoltage stress on protected ICs; enables tighter design margins versus higher-ratio TVS devices. |
| MSL Level 1 (260 °C peak reflow) | Compatible with standard lead-free SMT reflow profiles without preconditioning; eliminates moisture sensitivity handling overhead. |
| Glass passivated junction | Ensures stable VBR over time and temperature; reduces parameter drift in long-life embedded applications. |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine control modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across sensor output and ground to limit transients to <18.2 V. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V ADC inputs while maintaining signal fidelity during normal operation due to <1 µA leakage. |
Use Scenario: Guarding CAN_H and CAN_L lines in factory automation gateways subject to EFT and surge coupling from motor drives. IC Role / Device Role / Timing Role: Differential-mode TVS pair (one per line) referenced to common ground, suppressing common-mode surges up to ±33 A. Use Value: Maintains CAN signal integrity by clamping transients within bus voltage tolerance (±40 V), avoiding bit errors or node reset. |
| Consumer USB Port ESD Protection | Telecom DSL Line Protection |
|
Use Scenario: Safeguarding USB 2.0 D+/D− lines in set-top boxes against human-body-model (HBM) ESD events up to ±15 kV. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp (CJ ≈ 200 pF at 0 V) placed inline with data lines before USB transceiver. Use Value: Limits ESD-induced voltage excursion to <18.2 V without distorting 480 Mbps data eye; passes IEC 61000-4-2 Level 4. |
Use Scenario: Front-end protection of ADSL/VDSL line drivers in DSLAMs exposed to lightning-induced surges on twisted-pair copper lines. IC Role / Device Role / Timing Role: Primary surge limiter installed between line transformer secondary and codec IC, rated for 600 W unidirectional/bidirectional surges. Use Value: Absorbs >95 % of 10/1000 µs surge energy before reaching sensitive PHY, extending mean time between failures in outdoor cabinets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ11CA-E3/52 | Commercial-grade (non-AEC-Q101), same VWM/VBR/VC/PPPM, identical SMB package. | Lacks automotive qualification; suitable for consumer/industrial designs not requiring AEC validation. | Select when cost sensitivity outweighs automotive reliability requirements and lifecycle traceability is not mandated. |
| SMCJ11CAHE3_A/I | Same electrical specs but in larger SMC (DO-214AB) package; RθJA = 50 °C/W vs. 100 °C/W. | Higher thermal mass supports higher duty-cycle surge repetition; requires larger PCB area. | Choose when system-level surge repetition rate exceeds SMBJ11CAHE3_A/I derating limits or board space permits larger footprint. |
Compared with SMBJ11CA-E3/52, the SMBJ11CAHE3_A/I adds AEC-Q101 qualification and traceable automotive sourcing; compared with SMCJ11CAHE3_A/I, it trades thermal performance for compact SMB layout-critical for space-constrained ECUs and sensor nodes.
Availability
SMBJ11CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN networks, consumer USB ports, and telecom DSL line protection requiring stable component supply across multi-year production cycles.
Supply support for SMBJ11CAHE3_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, rectifiers, and protection devices with emphasis on reliability, precision, and automotive-grade validation.
The SMBJ series targets high-reliability transient suppression in harsh environments, with design focus on AEC-Q101 compliance, low clamping voltage, and compatibility with automated manufacturing for automotive and industrial end equipment.
FAQ
What is the maximum clamping voltage of SMBJ11CAHE3_A/I at its rated peak pulse current?
The SMBJ11CAHE3_A/I has a maximum clamping voltage (VC) of 18.2 V when subjected to its rated peak pulse current (IPPM) of 33 A under the standard 10/1000 µs waveform. This value is measured at TA = 25 °C with devices mounted on 5.0 mm × 5.0 mm copper pads per datasheet condition. The SMBJ11CAHE3_A/I maintains this clamping performance across its full operating temperature range, supporting robust protection of 3.3 V and 5 V logic interfaces.
Is SMBJ11CAHE3_A/I suitable for bidirectional signal line protection?
Yes, SMBJ11CAHE3_A/I is explicitly designed for bidirectional protection, as indicated by the "CA" suffix and confirmed in the datasheet's "DEVICES FOR BIDIRECTION APPLICATIONS" section. Its symmetrical breakdown behavior (VBR min/max identical in both directions) allows placement across any two points in an AC-coupled or differential path-such as CAN_H/CAN_L or USB D+/D−-without polarity constraints. The SMBJ11CAHE3_A/I delivers matched clamping in both polarities, ensuring balanced transient suppression.
Does SMBJ11CAHE3_A/I meet automotive qualification standards?
Yes, SMBJ11CAHE3_A/I is AEC-Q101 qualified, as confirmed by the "HE3" suffix and footnote (1) in the Thermal Characteristics table. This qualification covers stress tests including temperature cycling, high-temperature reverse bias (HTRB), and ESD per AEC-Q101 Rev D. The SMBJ11CAHE3_A/I is approved for use in automotive powertrain, chassis, and ADAS subsystems where reliability under extended temperature and vibration is mandatory.
What is the thermal resistance from junction to ambient for SMBJ11CAHE3_A/I?
The SMBJ11CAHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on the minimum recommended pad layout (0.2" × 0.2" copper pads per terminal). This value assumes natural convection cooling and is critical for calculating safe operating area during repetitive surge events. Derating curves in Figure 2 of the datasheet show how usable PPPM decreases above TA = 25 °C-essential for validating SMBJ11CAHE3_A/I performance in sealed enclosures or high-ambient environments.
How does the leakage current of SMBJ11CAHE3_A/I compare to other TVS diodes in its class?
The SMBJ11CAHE3_A/I specifies a maximum reverse leakage current (ID) of 1 µA at its 11 V stand-off voltage (VWM), measured at TA = 25 °C. This is lower than many competing 11 V TVS devices (e.g., some SOD-323 variants specify 5–10 µA), reducing standby power loss and minimizing loading on high-impedance sensor outputs or reference lines. The SMBJ11CAHE3_A/I achieves this via glass passivation and tight process control, making it especially suitable for battery-powered and precision analog applications.
SMBJ11CAHE3_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):
- 33A
- Power - Peak Pulse:
- 600W
- 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 (SMBJ)
SMBJ11CAHE3_A/I FAQ
1.How can I place an order for SMBJ11CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ11CAHE3_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 SMBJ11CAHE3_A/I reliable?
The price and inventory of SMBJ11CAHE3_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 SMBJ11CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMBJ11CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ11CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ11CAHE3_A/I?
SMBJ11CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ11CAHE3_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 SMBJ11CAHE3_A/I?
For technical support, including SMBJ11CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ11CAHE3_A/I requirements.
6.How does Aetrix verify that SMBJ11CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMBJ11CAHE3_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 SMBJ11CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMBJ11CAHE3_A/I?
All SMBJ11CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ11CAHE3_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 SMBJ11CAHE3_A/I part is unused and in its original packaging.
Return procedure for SMBJ11CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ11CAHE3_A/I Tags
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